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Percy AJ, Edwin M. A comprehensive review on the production and enhancement techniques of gaseous biofuels and their applications in IC engines with special reference to the associated performance and emission characteristics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 934:173087. [PMID: 38763185 DOI: 10.1016/j.scitotenv.2024.173087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/01/2024] [Accepted: 05/04/2024] [Indexed: 05/21/2024]
Abstract
The increasing global demand for energy, coupled with environmental concerns associated with fossil fuels, has led to the exploration of alternative fuel sources. Gaseous biofuels, derived from organic matter, have gained attention due to their renewable nature and clean combustion characteristics. The paper extensively explores production pathways for gaseous biofuels, including biogas, syngas, and hydrogen, providing insightful discussions on various sources and processes. The energy content, physical, and chemical properties of gaseous biofuels have been analysed, highlighting their potential as viable alternatives to conventional fuels. Distinctive properties of biogas, producer gas, and hydrogen that impact combustion characteristics and engine efficiency in IC engines are underscored. Furthermore, the review systematically reviews enhancement techniques for gaseous biofuels, encompassing strategies to augment quality, purity, and combustion efficiency. Various methods, ranging from substrate pretreatment for biogas to membrane separation for hydrogen, illustrate effective means of enhancing fuel performance. Rigorous examination of performance parameters such as brake thermal efficiency, specific fuel consumption and emissions characteristics such as NOx, CO, CO2, HC of gaseous biofuels in dual-fuel mode emphasizes efficiency and environmental impact, offering valuable insights into their feasibility as engine fuels. The findings of this review will serve as a valuable resource for researchers, engineers, and policymakers involved in alternative fuels and sustainable transportation, while also highlighting the need for further research and development to fully unlock the potential of gaseous biofuels in IC engines.
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Affiliation(s)
- A Jemila Percy
- Department of Mechanical Engineering, University College of Engineering, Nagercoil, Anna University Constituent College, Nagercoil, Tamil Nadu, India
| | - M Edwin
- Department of Mechanical Engineering, University College of Engineering, Nagercoil, Anna University Constituent College, Nagercoil, Tamil Nadu, India.
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2
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Wang H, Zhou Q. Potential application of bioelectrochemical systems in cold environments. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172385. [PMID: 38604354 DOI: 10.1016/j.scitotenv.2024.172385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/17/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Globally, more than half of the world's regions and populations inhabit psychrophilic and seasonally cold environments. Lower temperatures can inhibit the metabolic activity of microorganisms, thereby restricting the application of traditional biological treatment technologies. Bioelectrochemical systems (BES), which combine electrochemistry and biocatalysis, can enhance the resistance of microorganisms to unfavorable environments through electrical stimulation, thus showing promising applications in low-temperature environments. In this review, we focus on the potential application of BES in such environments, given the relatively limited research in this area due to temperature limitations. We select microbial fuel cells (MFC), microbial electrolytic cells (MEC), and microbial electrosynthesis cells (MES) as the objects of analysis and compare their operational mechanisms and application fields. MFC mainly utilizes the redox potential of microorganisms during substance metabolism to generate electricity, while MEC and MES promote the degradation of refractory substances by augmenting the electrode potential with an applied voltage. Subsequently, we summarize and discuss the application of these three types of BES in low-temperature environments. MFC can be employed for environmental remediation as well as for biosensors to monitor environmental quality, while MEC and MES are primarily intended for hydrogen and methane production. Additionally, we explore the influencing factors for the application of BES in low-temperature environments, including operational parameters, electrodes and membranes, external voltage, oxygen intervention, and reaction devices. Finally, the technical, economic, and environmental feasibility analyses reveal that the application of BES in low-temperature environments has great potential for development.
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Affiliation(s)
- Hui Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
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3
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Chettri D, Verma AK, Ghosh S, Verma AK. Biogas from lignocellulosic feedstock: current status and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:1-26. [PMID: 37697197 DOI: 10.1007/s11356-023-29805-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 09/06/2023] [Indexed: 09/13/2023]
Abstract
The organic wastes and residues generated from agricultural, industrial, and domestic activities have the potential to be converted to bioenergy. One such energy is biogas, which has already been included in rural areas as an alternative cooking energy source and agricultural activities. It is produced via anaerobic digestion of a wide range of organic nutrient sources and is an essential renewable energy source. The factors influencing biogas yield, i.e., the various substrate, their characteristics, pretreatment methods involved, different microbial types, sources, and inoculum properties, are analyzed. Furthermore, the optimization of these parameters, along with fermentation media optimization, such as optimum pH, temperature, and anaerobic digestion strategies, is discussed. Novel approaches of bioaugmentation, co-digestion, phase separation, co-supplementation, nanotechnology, and biorefinery approach have also been explored for biogas production. Finally, the current challenges and prospects of the process are discussed in the review.
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Affiliation(s)
- Dixita Chettri
- Department of Microbiology, Sikkim University, Gangtok, Sikkim, India, 737102
| | - Ashwani Kumar Verma
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Shilpi Ghosh
- Department of Biotechnology, University of North Bengal, Siliguri, West Bengal, India, 734104
| | - Anil Kumar Verma
- Department of Microbiology, Sikkim University, Gangtok, Sikkim, India, 737102.
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Abubakar UA, Lemar GS, Bello AAD, Ishaq A, Dandajeh AA, Jagun ZT, Houmsi MR. Evaluation of traditional and machine learning approaches for modeling volatile fatty acid concentrations in anaerobic digestion of sludge: potential and challenges. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33281-2. [PMID: 38649611 DOI: 10.1007/s11356-024-33281-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 04/07/2024] [Indexed: 04/25/2024]
Abstract
This study evaluates models for predicting volatile fatty acid (VFA) concentrations in sludge processing, ranging from classical statistical methods (Gaussian and Surge) to diverse machine learning algorithms (MLAs) such as Decision Tree, XGBoost, CatBoost, LightGBM, Multiple linear regression (MLR), Support vector regression (SVR), AdaBoost, and GradientBoosting. Anaerobic bio-methane potential tests were carried out using domestic wastewater treatment primary and secondary sludge. The tests were monitored over 40 days for variations in pH and VFA concentrations under different experimental conditions. The data observed was compared to predictions from the Gaussian and Surge models, and the MLAs. Based on correlation analysis using basic statistics and regression, the Gaussian model appears to be a consistent performer, with high R2 values and low RMSE, favoring precision in forecasting VFA concentrations. The Surge model, on the other hand, albeit having a high R2, has high prediction errors, especially in dynamic VFA concentration settings. Among the MLAs, Decision Tree and XGBoost excel at predicting complicated patterns, albeit with overfitting issues. This study provides insights underlining the need for context-specific considerations when selecting models for accurate VFA forecasts. Real-time data monitoring and collaborative data sharing are required to improve the reliability of VFA prediction models in AD processes, opening the way for breakthroughs in environmental sustainability and bioprocessing applications.
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Affiliation(s)
- Umar Alfa Abubakar
- Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, 1045, Kaduna, Nigeria
| | - Gul Sanga Lemar
- Department of Botany, Faculty of Biology, Kabul University, Kart-E-Char, Kabul, Afghanistan
| | - Al-Amin Danladi Bello
- Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, 1045, Kaduna, Nigeria
| | - Aliyu Ishaq
- Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, 1045, Kaduna, Nigeria
| | - Aliyu Adamu Dandajeh
- Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, 1045, Kaduna, Nigeria
| | - Zainab Toyin Jagun
- School of Built Environment Engineering and Computing, Leeds Beckett University City Campus, Leeds, UK.
| | - Mohamad Rajab Houmsi
- New Era and Development in Civil Engineering Research Group, Scientific Research Center, Al-Ayen University, Thi-Qar, Nasiriyah, 64001, Iraq
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Adnane I, Taoumi H, Elouahabi K, Lahrech K, Oulmekki A. Valorization of crop residues and animal wastes: Anaerobic co-digestion technology. Heliyon 2024; 10:e26440. [PMID: 38439870 PMCID: PMC10909651 DOI: 10.1016/j.heliyon.2024.e26440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 02/08/2024] [Accepted: 02/13/2024] [Indexed: 03/06/2024] Open
Abstract
To switch the over-reliance on fossil-based resources, curb environmental quality deterioration, and promote the use of renewable fuels, much attention has recently been directed toward the implementation of sustainable and environmentally benign 'waste-to-energy' technology exploiting a clean, inexhaustible, carbon-neutral, and renewable energy source, namely agricultural biomass. From this perspective, anaerobic co-digestion (AcoD) technology emerges as a potent and plausible approach to attain sustainable energy development, foster environmental sustainability, and, most importantly, circumvent the key challenges associated with mono-digestion. This review article provides a comprehensive overview of AcoD as a biochemical valorization pathway of crop residues and livestock manure for biogas production. Furthermore, this manuscript aims to assess the different biotic and abiotic parameters affecting co-digestion efficiency and present recent advancements in pretreatment technologies designed to enhance feedstock biodegradability and conversion rate. It can be concluded that the substantial quantities of crop residues and animal waste generated annually from agricultural practices represent valuable bioenergy resources that can contribute to meeting global targets for affordable renewable energy. Nevertheless, extensive and multidisciplinary research is needed to evolve the industrial-scale implementation of AcoD technology of livestock waste and crop residues, particularly when a pretreatment phase is included, and bridge the gap between small-scale studies and real-world applications.
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Affiliation(s)
- Imane Adnane
- Sidi Mohamed Ben Abdellah University (USMBA), IPI Laboratory, ENS, Fez, Morocco
| | - Hamza Taoumi
- Sidi Mohamed Ben Abdellah University (USMBA), IPI Laboratory, ENS, Fez, Morocco
| | - Karim Elouahabi
- Sidi Mohamed Ben Abdellah University (USMBA), IPI Laboratory, ENS, Fez, Morocco
| | - Khadija Lahrech
- Sidi Mohamed Ben Abdellah University (USMBA), ENSA, Fez, Morocco
| | - Abdellah Oulmekki
- Laboratory of Processes, Materials and Environment (LPME), Faculty of Science and Technology, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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Ali S, Yan Q, Sun H, Irfan M. Techno-economic analysis of biogas production from domestic organic wastes and locally sourced material: the moderating role of social media based-awareness. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:6460-6480. [PMID: 38148456 DOI: 10.1007/s11356-023-31543-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 12/09/2023] [Indexed: 12/28/2023]
Abstract
Management of organic waste addresses the issue of cleanliness and sanitation in developing nations such as Pakistan, where improper waste management usually leads to significant health problems and early mortality. The control of organic waste in rural regions of Pakistan and other developing nations needs to be undertaken using effective solutions. This study contributes to satisfying local needs such as cooking, lighting, and maintaining a comfortable temperature in anaerobic locations and works as a guideline for converting to biogas. This research aims to ascertain households' most substantial challenges concerning biogas production using domestic organic waste and locally sourced materials. The analysis is conducted on data from 81 respondents gathered using a comprehensive questionnaire assessment. Respondents were carefully chosen with the purposive sampling process. Primary data were collected from a structured questionnaire and partial least squares structural equation modeling (PLS-SEM) to evaluate the formulated assumptions. The results indicate that managing organic waste positively influences the sustainable improvement of biogas using human organic waste and locally resourced materials. The selected variables and their moderating effect significantly and favorably influence this conceptual model. Furthermore, all manipulating influences are constructively connected with implementing biogas technology using organic waste and locally resourced material, minimizing household energy expenses, and satisfying local needs. This study concludes that the government's green energy policy and economic incentives encourage households to use biogas energy produced from organic waste and locally resourced material. The government should use modern technology, resident training, and expert methodological assistance to induce households into biogas production using domestic organic waste and locally resourced material. Finally, the study's limitations and suggestions for further research are also addressed.
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Affiliation(s)
- Shahid Ali
- School of Economics and Management, North China Electric Power University, Beijing, 102206, China
| | - Qingyou Yan
- School of Economics and Management, North China Electric Power University, Beijing, 102206, China
- Beijing Key Laboratory of New Energy and Low-Carbon Development, North China Electric Power University, Beijing, 102206, China
| | - Huaping Sun
- School of Economics and Management, University of Science and Technology, Beijing, Beijing, 100083, China
| | - Muhammad Irfan
- School of Management and Economics, Beijing Institute of Technology, Beijing, 100081, China.
- Adnan Kassar School of Business, Lebanese American University, Beirut, Lebanon.
- Department of Business Administration, ILMA University, Karachi, 75190, Pakistan.
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7
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Meena PK, Pal A, Gautam S. Zone-wise biogas potential in India: fundamentals, challenges, and policy considerations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:1841-1862. [PMID: 38066273 DOI: 10.1007/s11356-023-31328-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 11/28/2023] [Indexed: 01/18/2024]
Abstract
The current manuscript focuses on the advancements made in establishing zone-based biogas plants in India from 1990 to the present. India generates various types of waste from agricultural, industrial, and human activities. Several methods are available to manage and derive energy from these waste materials, such as incineration, gasification, and anaerobic digestion (AD). Among these options, AD stands out as one of the most viable and environmentally friendly alternatives for biogas production, thanks to its low energy consumption. However, developing biogas plants in developing countries faces significant challenges, primarily due to governments' inadequate application of policy, financial, social, market, information, and technical constraints. To compile this information, data from various agencies in India have been gathered, revealing that 1.81 million biogas plants are currently installed in the West Zone, 1.48 million in the South Zone, 1.106 million in the North Zone, and 0.65 million in the East Zone. These biogas plants across the zones generate 7.02 lakh m3 per day. Additionally, 22 bio-CNG plants produce 84,759 kg/day of compressed biogas, and 201 waste plants generate 330.935 MW of electricity. Recently, the government has emphasized several initiatives, including GOBAR-DHAN, New National Biogas and Organic Manure, Sustainable Alternative Towards Affordable Transportation, and the waste-to-energy program. These initiatives aim to enhance the utilization of waste, promote cleanliness in villages and towns, and support the Swachh Bharat Mission and Atmanirbhar Bharat campaign, leading to tremendous overall success.
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Affiliation(s)
- Pradeep Kumar Meena
- Department of Mechanical Engineering, Delhi Technological University, Delhi, India.
| | - Amit Pal
- Department of Mechanical Engineering, Delhi Technological University, Delhi, India
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8
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Wang H, Zhou Q. Dominant factors analyses and challenges of anaerobic digestion under cold environments. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119378. [PMID: 37883833 DOI: 10.1016/j.jenvman.2023.119378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/14/2023] [Accepted: 10/14/2023] [Indexed: 10/28/2023]
Abstract
With the development of fermentation technology and the improvement of efficiency, anaerobic digestion (AD) has been playing an increasingly primary role in waste treatment and resource recovery. Temperature is undoubtedly the most important factor because it shapes microbial habitats, changes the composition of the microbial community structure, and even affects the expression of related functional genes. More than half of the biosphere is in a long-term or seasonal low-temperature environment (<20 °C), which makes psychrophilic AD have broad application prospects. Therefore, this review discusses the influencing factors and enhancement strategies of psychrophilic AD, which may provide a corresponding reference for future research on low-temperature fermentation. First, the occurrence of AD has been discussed. Then, the adaptation of microorganisms to the low-temperature environment was analyzed. Moreover, the challenges of psychrophilic AD have been reviewed. Meanwhile, the strategies for improving psychrophilic AD are presented. Further, from technology to application, the current situation of psychrophilic AD in pilot-scale tests is described. Finally, the economic and environmental feasibility of psychrophilic AD has been highlighted. In summary, psychrophilic AD is technically feasible, while economic analysis shows that the output benefits cannot fully cover the input costs, and the large-scale practical application of psychrophilic AD is still in its infancy. More research should focus on how to improve fermentation efficiency and reduce the investment cost of psychrophilic AD.
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Affiliation(s)
- Hui Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Carbon Neutrality Interdisciplinary Science Center/College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Carbon Neutrality Interdisciplinary Science Center/College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
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9
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Wang C, Nakakoji S, Ng TCA, Zhu P, Tsukada R, Tatara M, Ng HY. Acclimatizing waste activated sludge in a thermophilic anaerobic fixed-bed biofilm reactor to maximize biogas production for food waste treatment at high organic loading rates. WATER RESEARCH 2023; 242:120299. [PMID: 37441869 DOI: 10.1016/j.watres.2023.120299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/21/2023] [Accepted: 07/01/2023] [Indexed: 07/15/2023]
Abstract
Thermophilic anaerobic digestion (TAD) provides a promising solution for sustainable high-strength waste treatment due to its enhanced methane-rich biogas recovery. However, high organic loading rates (OLR) exceeding 3.0 kgCOD/m3/day and short hydraulic retention times (HRT) below 10 days pose challenges in waste-to-energy conversion during TAD, stemming from volatile fatty acids (VFAs) accumulation and methanogenesis failure. In this study, we implemented a stepwise strategy for acclimatizing waste activated sludge (WAS) in a thermophilic anaerobic fixed-bed biofilm reactor (TA-FBBR) to optimize methanogen populations, thereby enhancing waste-to-energy efficiencies under elevated OLRs in food waste treatment. Results showed that following stepwise acclimatization, the TA-FBBR achieved stable methane production of approximately 5.8 L/L-reactor/day at an ultrahigh OLR of ∼20 kgCOD/m3/day and ∼15 kgVS/m3/day at 6-day HRT in food waste treatment. The average methane yield reached 0.45 m3/kgCODremoval, attaining the theoretical production in TAD. Moreover, VFA concentrations were stabilized below 1000 mg/L at the ultrahigh OLR under 6-day HRT, while maintaining an acetate/propionate ratio of > 1.8 and a VFA/TAK ratio of < 0.3 serving as effective indicators of system stability and methane yield potential. The microbial community analysis revealed that the WAS acclimatization strategy fostered the microbial diversity and abundance of Methanothermobacter and Methanosarcina. Methanosarcina in the biofilm were observed to be twice as abundant as Methanothermobacter, indicating a potential preference for biofilm existence among methanogens. The findings demonstrated an effective strategy, specifically the stepwise acclimatization of WAS in a thermophilic fixed-bed biofilm reactor, to enhance the food waste treatment performance at high OLRs, contributing valuable mechanistic and technical insights for future sustainable high-strength waste management.
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Affiliation(s)
- Chuansheng Wang
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
| | - Sumire Nakakoji
- Kajima Technical Research Institute, 2-19-1 Tobitakyu, Chofushi, Tokyo 182-0036, Japan
| | - Tze Chiang Albert Ng
- National University of Singapore Environmental Research Institute, 5A Engineering Drive 1, 117411, Singapore
| | - Peilin Zhu
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore
| | - Ryohei Tsukada
- Kajima Technical Research Institute, 2-19-1 Tobitakyu, Chofushi, Tokyo 182-0036, Japan
| | - Masahiro Tatara
- Kajima Technical Research Institute, 2-19-1 Tobitakyu, Chofushi, Tokyo 182-0036, Japan
| | - How Yong Ng
- Center for Water Research, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, 519087, China; Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, 117576, Singapore.
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Kirubaharan CJ, Wang JW, Abbas SZ, Shah SB, Zhang Y, Wang JX, Yong YC. Self-assembly of cell-embedding reduced graphene oxide/ polypyrrole hydrogel as efficient anode for high-performance microbial fuel cell. CHEMOSPHERE 2023; 318:137937. [PMID: 36925003 DOI: 10.1016/j.chemosphere.2023.137937] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 01/19/2023] [Accepted: 01/21/2023] [Indexed: 05/23/2023]
Abstract
A three-dimensional (3D) macroporous reduced graphene oxide/polypyrrole (rGO/Ppy) hydrogel assembled by bacterial cells was fabricated and applied for microbial fuel cells. By taking the advantage of electroactive cell-induced bioreduction of graphene oxide and in-situ polymerization of Ppy, a facile self-assembly by Shewanella oneidensis MR-1and in-situ polymerization approach for 3D rGO/Ppy hydrogel preparation was developed. This facile one-step self-assembly process enabled the embedding of living electroactive cells inside the hydrogel electrode, which showed an interconnected 3D macroporous structures with high conductivity and biocompatibility. Electrochemical analysis indicated that the self-assembly of cell-embedding rGO/Ppy hydrogel enhanced the electrochemical activity of the bioelectrode and reduced the electron charge transfer resistance between the cells and the electrode. Impressively, extremely high power output of 3366 ± 42 mW m-2 was achieved from the MFC with cell-embedding rGO/Ppy hydrogel rGO/Ppy, which was 8.6 times of that delivered from the MFC with bare electrode. Further analysis indicated that the increased cell loading by the hydrogel and improved electrochemical activity by the rGO/Ppy composite would be the underlying mechanism for this performance improvement. This study provided a facile approach to fabricate the biocompatible and electrochemical active 3D nanocomposites for MFC, which would also be promising for performance optimization of various bioelectrochemical systems.
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Affiliation(s)
- C Joseph Kirubaharan
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China
| | - Jian-Wei Wang
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China
| | - Syed Zaghum Abbas
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China
| | - Syed Bilal Shah
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China
| | - Yafei Zhang
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China
| | - Jing-Xian Wang
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China; School of Medicine, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China.
| | - Yang-Chun Yong
- Biofuels Institute, School of Environment and Safety Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, 212013, Jiangsu Province, China.
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11
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Aili Hamzah AF, Hamzah MH, Che Man H, Jamali NS, Siajam SI, Ismail MH. Effect of organic loading on anaerobic digestion of cow dung: Methane production and kinetic study. Heliyon 2023; 9:e16791. [PMID: 37303543 PMCID: PMC10250787 DOI: 10.1016/j.heliyon.2023.e16791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/25/2023] [Accepted: 05/28/2023] [Indexed: 06/13/2023] Open
Abstract
Organic loading influences the effectiveness of producing biogas through anaerobic digestion. This study set out to investigate the effect of organic loading on the anaerobic mesophilic digestion of cow dung, the parameters involved in the digestion process and to evaluate the kinetics. Anaerobic digestion of cow dung at different organic loading (gVS/L) of 14 gVS/L, 18gVS/L, 22 gVS/L, 26 gVS/L and 30 gVS/L were investigated. Increasing the organic loading increased the methane yield of the cow dung. The highest cumulative methane yield was observed at 30 gVS/L with 63.42 mL CH4/gVS while the highest biogas yield was reported at 192.53 mL/gVS with the highest methane content of 89%. In addition, the modified Gompertz model equation with an R2 of 0.9980 demonstrated strong consistency and a good fit between predicted and experimental data. The high number of substrates added to the systems when increasing the organic loading increased the λ and slow down the nutrient transport and hydrolysis. This study provides current information on the effects of organic loading on the anaerobic digestion of cow dung in batch mode, including experimental conditions and operational parameters.
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Affiliation(s)
- Adila Fazliyana Aili Hamzah
- Department of Biological and Agricultural Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Muhammad Hazwan Hamzah
- Department of Biological and Agricultural Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
- Smart Farming Technology Research Centre, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Hasfalina Che Man
- Department of Biological and Agricultural Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
- Smart Farming Technology Research Centre, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Nur Syakina Jamali
- Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Shamsul Izhar Siajam
- Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
| | - Muhammad Heikal Ismail
- Department of Chemical and Environmental Engineering, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
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Amin N, Aslam M, Khan Z, Yasin M, Hossain S, Shahid MK, Inayat A, Samir A, Ahmad R, Murshed MN, Khurram MS, El Sayed ME, Ghauri M. Municipal solid waste treatment for bioenergy and resource production: Potential technologies, techno-economic-environmental aspects and implications of membrane-based recovery. CHEMOSPHERE 2023; 323:138196. [PMID: 36842558 DOI: 10.1016/j.chemosphere.2023.138196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 02/12/2023] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
World estimated municipal solid waste generating at an alarming rate and its disposal is a severe concern of today's world. It is equivalent to 0.79 kg/d per person footprint and causing climate change; health hazards and other environmental issues which need attention on an urgent basis. Waste to energy (WTE) considers as an alternative renewable energy potential to recover energy from waste and reduce the global waste problems. WTE reduced the burden on fossil fuels for energy generation, waste volumes, environmental, and greenhouse gases emissions. This critical review aims to evaluate the source of solid waste generation and the possible routes of waste management such as biological landfill and thermal treatment (Incineration, pyrolysis, and gasification). Moreover, a comparative evaluation of different technologies was reviewed in terms of economic and environmental aspects along with their limitations and advantages. Critical literature revealed that gasification seemed to be the efficient route and environmentally sustainable. In addition, a framework for the gasification process, gasifier types, and selection of gasifiers for MSW was presented. The country-wise solutions recommendation was proposed for solid waste management with the least impact on the environment. Furthermore, key issues and potential perspectives that require urgent attention to facilitate global penetration are highlighted. Finally, practical implications of membrane and comparison membrane-based separation technology with other conventional technologies to recover bioenergy and resources were discussed. It is expected that this study will lead towards practical solution for future advancement in terms of economic and environmental concerns, and also provide economic feasibility and practical implications for global penetration.
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Affiliation(s)
- Naila Amin
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan; Department of Chemical Engineering and Technology, University of Gujrat, Hafiz Hayat campus, Gujrat, Pakistan
| | - Muhammad Aslam
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan.
| | - Zakir Khan
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan.
| | - Muhammad Yasin
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Shakhawat Hossain
- Department of Industrial and Production Engineering, Jashore University of Science and Technology, Jessore, 7408, Bangladesh
| | - Muhammad Kashif Shahid
- Research Institute of Environment & Biosystem, Chungnam National University, Yuseonggu, Daejeon, 34134, Republic of Korea
| | - Abrar Inayat
- Department of Sustainable and Renewable Energy Engineering, University of Sharjah, Sharjah, United Arab Emirates; Biomass & Bioenergy Research Group, Center for Sustainable Energy and Power Systems Research, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Ahmed Samir
- Physics Department, Faculty of Science and Arts, King Khalid University, Muhayl Asser, Saudi Arabia; Center of Plasma Technology, Al-Azhar University, Cairo, Egypt
| | - Rizwan Ahmad
- Department of Chemical and Energy Engineering, Pak-Austria Fachhochschule: Institute of Applied Sciences & Technology (PAF-IAST), Haripur, Pakistan
| | - Mohammad N Murshed
- Physics Department, Faculty of Science and Arts, King Khalid University, Muhayl Asser, Saudi Arabia
| | - Muhammad Shahzad Khurram
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Mohamed E El Sayed
- Physics Department, Faculty of Science and Arts, King Khalid University, Muhayl Asser, Saudi Arabia
| | - Moinuddin Ghauri
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
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Offie I, Piadeh F, Behzadian K, Campos LC, Yaman R. Development of an artificial intelligence-based framework for biogas generation from a micro anaerobic digestion plant. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 158:66-75. [PMID: 36640670 DOI: 10.1016/j.wasman.2022.12.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Despite the advantages of the Anaerobic Digestion (AD) technology for organic waste management, low system performance in biogas production negatively affects the wide spread of this technology. This paper develops a new artificial intelligence-based framework to predict and optimise the biogas generated from a micro-AD plant. The framework comprises some main steps including data collection and imputation, recurrent neural network/ Non-Linear Autoregressive Exogenous (NARX) model, shuffled frog leaping algorithm (SFLA) optimisation model and sensitivity analysis. The suggested framework was demonstrated by its application on a real micro-AD plant in London. The NARX model was developed for predicting yielded biogas based on the feeding data over preceding days in which their lag times were fine-tuned using the SFLA. The optimal daily feeding pattern to obtain maximum biogas generation was determined using the SFLA. The results show that the developed framework can improve the productivity of biogas in optimal operation strategy by 43 % compared to business as usual and the average biogas produced can raise from 3.26 to 4.34 m3/day. The optimal feeding pattern during a four-day cycle is to feed over the last two days and thereby reducing the operational costs related to the labour for feeding the plant in the first two days. The results of the sensitivity analysis show the optimised biogas generation is strongly influenced by the content of oats and catering waste as well as the optimal allocated day for adding feed to the main digester compared to other feed variables e.g., added water and soaked liner.
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Affiliation(s)
- Ikechukwu Offie
- School of Computing and Engineering, University of West London, Ealing, London, W5 5RF, UK
| | - Farzad Piadeh
- School of Computing and Engineering, University of West London, Ealing, London, W5 5RF, UK
| | - Kourosh Behzadian
- School of Computing and Engineering, University of West London, Ealing, London, W5 5RF, UK.
| | - Luiza C Campos
- Civil, Environmental and Geomatic Engineering, University College London, Gower St, London WC1E6BT, UK.
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Research trends and strategies for the improvement of anaerobic digestion of food waste in psychrophilic temperatures conditions. Heliyon 2022; 8:e11174. [PMID: 36340003 PMCID: PMC9626950 DOI: 10.1016/j.heliyon.2022.e11174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 09/09/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022] Open
Abstract
The organic fraction of municipal solid waste is mainly composed of food waste (FW), and traditional disposal practices for this fraction are generally considered to have negative environmental and economic impacts. However, the organic characteristics of this fraction could also be exploited through the anaerobic digestion of FW (FW-AD), which represents unique advantages, including the reduction of the area required for final disposal and environmental pollution and the same time the generation of renewable energy (mainly methane gas), and a by-product for agricultural use (digestate) due to its high nutrient content. Although approximately 88% of the world's population resides in areas with temperatures below 8 °C, psychrophilic conditions (temperatures below 20 °C) have hardly been studied, while mesophilic (66%) and thermophilic (27%) ranges were found to be more common than psychrophilic FW-AD (7%). The latter condition could decrease microbial activity and organic matter removal, which could affect biogas production and even make AD unfeasible. To improve the efficiency of the psychrophilic FW-AD process, there are strategies such as: measurement of physical properties as particle size, rheological characteristics (viscosity, consistency index and substrate behavior index), density and humidity, bioaugmentation and co-digestion with other substrates, use of inocula with psychrophilic methanogenic communities, reactor heating and modification of reactor configurations. However, these variables have hardly been studied in the context of psychrophilic conditions and future research should focus on evaluating the influence of these variables on FW-AD under psychrophilic conditions. Through a bibliometric analysis, this paper has described and analyzed the FW-AD process, with a focus on the psychrophilic conditions (<20 °C) so as to identify advances and future research trends, as well as determine strategies toward improving the anaerobic process under low temperature conditions. Temperature has a great influence on anaerobic digestion of food waste (FW-AD). Studies on the psychrophilic condition are limited, warranting further research. Physical properties of the substrate and inoculum influence psychrophilic FW-AD. The use of inocula adapted to low temperatures could increase biogas production. Changes in reactor configurations could improve biogas yield at low temperature.
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15
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Hydrogen Production by the Thermophilic Dry Anaerobic Co-Fermentation of Food Waste Utilizing Garden Waste or Kitchen Waste as Co-Substrate. SUSTAINABILITY 2022. [DOI: 10.3390/su14127367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Multicomponent collaborative anaerobic fermentation has been considered a promising technology for treating perishable organic solid wastes and producing clean energy. This study evaluated the potential of hydrogen production by thermophilic dry anaerobic co-fermentation of food waste (FW) with garden waste (GW) or kitchen waste (KW) as co-substrate. The results showed that when the ratio of FW to GW was 60:40, the maximum cumulative hydrogen production and organic matter removal rate reached 85.28 NmL g−1 VS and 63.29%, respectively. When the ratio of FW to KW was 80:20, the maximum cumulative hydrogen production and organic matter removal rate reached 81.31 NmL g−1 VS and 61.91%, respectively. These findings suggest that thermophilic dry anaerobic co-fermentation of FW using GW or KW as co-substrate has a greater potential than single-substrate fermentation to improve hydrogen production and the organic matter removal rate.
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16
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Lim YF, Chan YJ, Abakr YA, Sethu V, Selvarajoo A, Singh A, Lee J, Gareth M. Evaluation of potential feedstock for biogas production via anaerobic digestion in Malaysia: kinetic studies and economics analysis. ENVIRONMENTAL TECHNOLOGY 2022; 43:2492-2509. [PMID: 33502966 DOI: 10.1080/09593330.2021.1882587] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
As the population increases, energy demands continue to rise rapidly. In order to satisfy this increasing energy demand, biogas offers a potential alternative. Biogas is economically viable to be produced through anaerobic digestion (AD) from various biomass feedstocks that are readily available in Malaysia, such as food waste (FW), palm oil mill effluent (POME), garden waste (GW), landfill, sewage sludge (SS) and animal manure. This paper aims to determine the potential feedstocks for biogas production via AD based on their characteristics, methane yield, kinetic studies and economic analysis. POME and FW show the highest methane yield with biogas yields up to 0.50 L/g VS while the lowest is 0.12 L/g VS by landfill leachate. Kinetic study shows that modified Gompertz model fits most of the feedstock with R 2 up to 1 indicating that this model can be used for estimating treatment efficiencies of full-scale reactors and performing scale-up analysis. The economic analysis shows that POME has the shortest payback period (PBP), highest internal rate of return (IRR) and net present value (NPV). However, it has already been well explored, with 93% of biogas plants in Malaysia using POME as feedstock. The FW generation rate in Malaysia is approximately 15,000 tonnes per day, at the same time FW as the second place shows potential to have a PBP of 5.4 years and 13.3% IRR, which is close to the results achieved with POME. This makes FW suitable to be used as the feedstock for biogas production.
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Affiliation(s)
- Yik Fu Lim
- Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Yi Jing Chan
- Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Yousif Abdalla Abakr
- Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Vasanthi Sethu
- Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Anurita Selvarajoo
- Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Ajit Singh
- Faculty of Science and Engineering, University of Nottingham Malaysia, Semenyih, Malaysia
| | - Junyan Lee
- Tex Cycle (P2) Sdn. Bhd, Port Klang, Selangor, Malaysia
| | - Milton Gareth
- Ricardo UK Ltd, Shoreham Technical centre, West Sussex, UK
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17
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Boboua SYB, Zhou C, Li J, Bi W, Wang R, Chen S, Zheng G. Augmentation characteristics and microbial community dynamics of low temperature resistant composite strains LTF-27. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:35338-35349. [PMID: 35050471 DOI: 10.1007/s11356-022-18677-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 01/11/2022] [Indexed: 06/14/2023]
Abstract
Biogas production in the cold regions of China is hindered by low temperatures, which led to slow lignocellulose biotransformation. Cold-adapted lignocellulose degrading microbial complex community LTF-27 was used to investigate the influence of hydrolysis on biogas production. After 5 days of hydrolysis at 15 ± 1 °C, the hydrolysis conversion rate of the corn straw went up to 22.64%, and the concentration of acetic acid increased to 2596.56 mg/L. The methane production rates of total solids (TS) inoculated by LTF-27 reached 204.72 mL/g, which was higher than the biogas (161.34 mL/g), and the control group (CK) inoculated with cultural solution (121.19 mL/g), the methane production rate of volatile solids (VS) increased by 26.88% and 68.92%, respectively. Parabacteroides, Lysinibacillus, and Citrobacter were the main organisms that were responsible for hydrolysis. While numerous other bacteria genera in the gas-producing phase, Macellibacteroides were the most commonly occurring one. Methanosarcina and Methanobacteriaceae contributed 86.25% and 11.80% of the total Archaea abundance during this phase. This study proves the psychrotrophic LTF-27's applicability in hydrolysis and biomass gas production in low temperatures.
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Affiliation(s)
- Stopira Yannick Benz Boboua
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China
- Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province, Harbin, 150030, People's Republic of China
| | - Chenyang Zhou
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China
- Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province, Harbin, 150030, People's Republic of China
| | - Jiachen Li
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China
- Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province, Harbin, 150030, People's Republic of China
| | - Weishuai Bi
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China
- Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province, Harbin, 150030, People's Republic of China
| | - Ruxian Wang
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China
- Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province, Harbin, 150030, People's Republic of China
| | - Shengnan Chen
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China
- Key Laboratory of Pig-Breeding Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, 150030, People's Republic of China
| | - Guoxiang Zheng
- College of Engineering, Northeast Agriculture University, Harbin, 150030, People's Republic of China.
- Key Laboratory of Agricultural Renewable Resources Utilization Technology and Equipment in Cold Areas of Heilongjiang Province, Harbin, 150030, People's Republic of China.
- Key Laboratory of Pig-Breeding Facilities Engineering, Ministry of Agriculture and Rural Affairs, Harbin, 150030, People's Republic of China.
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18
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Zhao Y, Qamar SA, Qamar M, Bilal M, Iqbal HMN. Sustainable remediation of hazardous environmental pollutants using biochar-based nanohybrid materials. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 300:113762. [PMID: 34543967 DOI: 10.1016/j.jenvman.2021.113762] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 02/08/2023]
Abstract
Biochar is a well-known carbon material with diversified functionalities and excellent physicochemical characteristics with high wastewater treatment potential. This review aims to summarize recent advancements in the development of biochar and biochar-based nanohybrid materials as a potential tool for the removal of harmful organic compounds such as synthetic dyes/effluents. The formation of biochar using pyrolysis of renewable feedstocks and their applications in various industries are explained hereafter. The characteristics and construction of biochar-based hybrid materials are explained in detail. Diversity of feedstocks, including municipal wastes, industrial byproducts, agricultural, and forestry residues, endows different biochar types with a wide structural variety. The production of cost-effective biochar drives the interest in manipulating biochars and induces desire functionality using nanoscale reinforcements. Various types of biochars, such as magnetic biochar, layered nanomaterial coated biochar, nanometallic oxide composites, chemically and physically functionalized biochar, have been produced. With the aid of nanomaterial, hybrid biochar exhibits a high potential to remove toxic contaminants. Depending upon biochar type, dyes/effluents can be removed via different mechanisms, including the Fenton process, photocatalytic degradation, π-π interaction, electrostatic interaction, and physical adsorption. In conclusion, desired physicochemical features, and tunable surface properties of biochar present high potential material in removing organic dyes and other effluents. The blended biochar with different materials/nanomaterials endows broader development and multi-functional opportunities for treating dyes/effluents.
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Affiliation(s)
- Yuping Zhao
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Sarmad Ahmad Qamar
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Mahpara Qamar
- Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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19
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Improvement of Biomethane Production from Organic Fraction of Municipal Solid Waste (OFMSW) through Alkaline Hydrogen Peroxide (AHP) Pretreatment. FERMENTATION 2021. [DOI: 10.3390/fermentation7030197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The organic fraction resulting from the separate collection of municipal solid waste (OFMSW) is an abundant residue exploitable for biofuel production. Anaerobic digestion (AD) is one of the most attractive technologies for the treatment of organic wastes thanks to the generation of biogas with a high methane content. However, because of its complex composition, the direct digestion of OFMSW can be less effective. To overcome these difficulties, many pretreatments are under development. In this work, the efficacy of alkaline hydrogen peroxide (AHP) oxidation was assessed for the first time as a pretreatment of OFMSW to enhance its anaerobic biodegradability. In this regard, many AHP batch tests were executed at pH 9 and by changing the peroxide dosages up to 1 gH2O2/gCOD, under room temperature and pressure conditions. Afterwards, biomethane potential tests (BMP) were conducted to evaluate the performance of anaerobic digestion both on raw and pretreated OFMSW. The pretreatment tests demonstrated that AHP induces only a weak reduction in the organic load, reaching a maximum COD removal of about 28%. On the other hand, notable productions of volatile fatty acids (VFA) were found. In fact, by applying a peroxide dose of just 0.025 gH2O2/gCOD, there was a doubling in VFA concentration, which increased by five times with the highest H2O2 amount. These results indicate that AHP mainly causes the conversion of complex organic substrates into easily degradable compounds. This conversion made it possible to achieve much better performance during the BMP tests conducted with the pretreated waste compared to that carried out on fresh OFMSW. Indeed, a low methane production of just 37.06 mLCH4/gTS was detected on raw OFMSW. The cumulated CH4 production in the pretreated samples increased in response to the increase in H2O2 dosage applied during AHP. Maximum specific productions of about 463.7 mLCH4/gTS and 0.31 LCH4/gCODremoved were calculated on mixtures subjected to AHP. On these samples, the satisfactory evolution of AD was confirmed by the process parameters calculated by modeling the cumulated CH4 curves through a new proposed formulation of the Gompertz equation.
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20
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Sun J, Zhang L, Loh KC. Review and perspectives of enhanced volatile fatty acids production from acidogenic fermentation of lignocellulosic biomass wastes. BIORESOUR BIOPROCESS 2021; 8:68. [PMID: 38650255 PMCID: PMC10992391 DOI: 10.1186/s40643-021-00420-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 07/22/2021] [Indexed: 12/13/2022] Open
Abstract
Lignocellulosic biomass wastes are abundant resources that are usually valorized for methane-rich biogas via anaerobic digestion. Conversion of lignocellulose into volatile fatty acids (VFA) rather than biogas is attracting attention due to the higher value-added products that come with VFA utilization. This review consolidated the latest studies associated with characteristics of lignocellulosic biomass, the effects of process parameters during acidogenic fermentation, and the intensification strategies to accumulate more VFA. The differences between anaerobic digestion technology and acidogenic fermentation technology were discussed. Performance-enhancing strategies surveyed included (1) alkaline fermentation; (2) co-digestion and high solid-state fermentation; (3) pretreatments; (4) use of high loading rate and short retention time; (5) integration with electrochemical technology, and (6) adoption of membrane bioreactors. The recommended operations include: mesophilic temperature (thermophilic for high loading rate fermentation), C/N ratio (20-40), OLR (< 12 g volatile solids (VS)/(L·d)), and the maximum HRT (8-12 days), alkaline fermentation, membrane technology or electrodialysis recovery. Lastly, perspectives were put into place based on critical analysis on status of acidogenic fermentation of lignocellulosic biomass wastes for VFA production.
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Affiliation(s)
- Jiachen Sun
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore
| | - Le Zhang
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore, 138602, Singapore
- Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore
| | - Kai-Chee Loh
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore.
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore, 138602, Singapore.
- Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, Singapore, 138602, Singapore.
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21
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Prajapati P, Varjani S, Singhania RR, Patel AK, Awasthi MK, Sindhu R, Zhang Z, Binod P, Awasthi SK, Chaturvedi P. Critical review on technological advancements for effective waste management of municipal solid waste — Updates and way forward. ENVIRONMENTAL TECHNOLOGY & INNOVATION 2021; 23:101749. [DOI: 10.1016/j.eti.2021.101749] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/20/2023]
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22
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Sołowski G, Pastuszak K. Modelling of dark fermentation of glucose and sour cabbage. Heliyon 2021; 7:e07690. [PMID: 34401576 PMCID: PMC8350504 DOI: 10.1016/j.heliyon.2021.e07690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/30/2021] [Accepted: 07/27/2021] [Indexed: 11/25/2022] Open
Abstract
In the article, modified Anaerobic Digestion Models 1 (ADM-1) was tested for modelling dark fermentation for hydrogen production. The model refitting was done with the Euler method. The new model was based on sets of differential equations. The model was checked for hydrogen production from sour cabbage in batch and semi-batch in 5 g VSS (volatile solid suspension)/L and at the semi-batch process from glucose at 5 and 10 g VSS/L. Added parameters determined the conversion of a substrate, hydrogen production, and stress parameters. In the case of a semi-batch process, for one month, cumulative hydrogen production from sour cabbage of 5 g VSS/L was 0.9 L of cumulative hydrogen volume and from glucose 5 g VSS/L (in case of feeding 2 g VSS/L every two days) 2.5 L of cumulative hydrogen volume. At the bacterial population level, hydrogen production was a continuous process at an adequate range of population size and environmental parameters.
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Affiliation(s)
- Gaweł Sołowski
- Gdansk University of Technology, Faculty of Mechanical Engineering, Poland
| | - Krzysztof Pastuszak
- Gdansk University of Technology, Department of Algorithms and Systems Modelling, Faculty of Electronics, Telecommunications and Informatics, Building A, EA 226, Poland
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23
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Chinellato G, Battista F, Bolzonella D, Cavinato C. Single-phase anaerobic digestion of the organic fraction of municipal solid waste without dilution: Reactor stability and process performance of small, decentralised plants. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 125:103-111. [PMID: 33677180 DOI: 10.1016/j.wasman.2021.02.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 02/03/2021] [Accepted: 02/06/2021] [Indexed: 06/12/2023]
Abstract
Currently, centralised plants are the most favoured approach for the anaerobic treatment of the organic fraction of municipal solid waste (OFMSW). However, centralised solutions imply certain environmental impacts, which prevent large-scale implementation of the anaerobic digestion (AD). As a result, we are digesting <5% of organic waste both in Europe and the USA even today. Pursuing the criteria for maximising the balance between profit and impacts, an innovative layout with the ultimate goal of promoting the use of small, decentralised AD plants is proposed. In this study, source-separated OFMSW (SS-OFMSW) was treated in a mesophilic plug flow reactor by applying an atypical combination of conditions such as high SS-OFMSW solid content (214.5 g·kg-1), high organic loading rate (6.2 kg VS·m-3·d-1), and no dilution or co-substrate addition. A suitable and an efficient mixing system is essential to control the process. Accordingly, the process was stable in a single-stage reactor, in the absence of digestate recirculation, obtaining specific gas production of 0.67 m3·kg-1 VS in terms of biogas and 0.41 m3·kg-1 VS in terms of methane. High reactor volume exploitation and small plant construction were feasible, reaching a gas production rate of 4.5 m3·m-3 d-1. The estimated costs in terms of capital and operating expenditure are expected to realize gross economic sustainability of full-scale installation.
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Affiliation(s)
- G Chinellato
- Schmack Biogas srl, Bolzano 39100, Italy; Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, via Torino 155, Venice 30172, Italy.
| | - F Battista
- Department of Biotechnology, University of Verona, Strada Le Grazie, Verona 37134, Italy
| | - D Bolzonella
- Department of Biotechnology, University of Verona, Strada Le Grazie, Verona 37134, Italy
| | - C Cavinato
- Department of Environmental Sciences, Informatics and Statistics, Ca' Foscari University of Venice, via Torino 155, Venice 30172, Italy
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Hu Q, Jung J, Chen D, Leong K, Song S, Li F, Mohan BC, Yao Z, Prabhakar AK, Lin XH, Lim EY, Zhang L, Souradeep G, Ok YS, Kua HW, Li SFY, Tan HTW, Dai Y, Tong YW, Peng Y, Joseph S, Wang CH. Biochar industry to circular economy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 757:143820. [PMID: 33248779 DOI: 10.1016/j.scitotenv.2020.143820] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/29/2020] [Accepted: 10/30/2020] [Indexed: 06/12/2023]
Abstract
Biochar, produced as a by-product of pyrolysis/gasification of waste biomass, shows great potential to reduce the environment impact, address the climate change issue, and establish a circular economy model. Despite the promising outlook, the research on the benefits of biochar remains highly debated. This has been attributed to the heterogeneity of biochar itself, with its inherent physical, chemical and biological properties highly influenced by production variables such as feedstock types and treating conditions. Hence, to enable meaningful comparison of results, establishment of an agreed international standard to govern the production of biochar for specific uses is necessary. In this study, we analyzed four key uses of biochar: 1) in agriculture and horticulture, 2) as construction material, 3) as activated carbon, and 4) in anaerobic digestion. Then the guidelines for the properties of biochar, especially for the concentrations of toxic heavy metals, for its environmental friendly application were proposed in the context of Singapore. The international status of the biochar industry code of practice, feedback from Singapore local industry and government agencies, as well as future perspectives for the biochar industry were explained.
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Affiliation(s)
- Qiang Hu
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore
| | - Janelle Jung
- Research & Horticulture Department, Gardens by the Bay, 18 Marina Gardens Drive, Singapore 018953, Singapore
| | - Dexiang Chen
- Research & Horticulture Department, Gardens by the Bay, 18 Marina Gardens Drive, Singapore 018953, Singapore
| | - Ken Leong
- Mursun PTE. LTD, 14 Robinson Road, Singapore 048545, Singapore
| | - Shuang Song
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Fanghua Li
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore
| | - Babu Cadiam Mohan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Zhiyi Yao
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Arun Kumar Prabhakar
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore
| | - Xuan Hao Lin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Ee Yang Lim
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Le Zhang
- NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower #15-02, Singapore 138602, Singapore
| | - Gupta Souradeep
- School of Civil and Environmental Engineering, The University of New South Wales, Kingsford, NSW 2032, Australia
| | - Yong Sik Ok
- Korea Biochar Research Center & APRU Sustainable Waste Management Program & Division of Environmental Science and Ecological Engineering, Korea University, Seoul 02841, South Korea
| | - Harn Wei Kua
- Department of Building, School of Design and Environment, National University of Singapore, 4 Architecture Drive, Singapore 117566, Singapore
| | - Sam F Y Li
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Hugh T W Tan
- Department of Biological Sciences, National University of Singapore, 16 Science Drive 4, Singapore 117558, Singapore
| | - Yanjun Dai
- Institute of Refrigeration and Cryogenics, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yen Wah Tong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore
| | - Yinghong Peng
- Department of Mechanical Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Stephen Joseph
- School of Materials Science and Engineering, University of New South Wales, Kensington, NSW 2052, Australia
| | - Chi-Hwa Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
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25
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Cesaro A. The valorization of the anaerobic digestate from the organic fractions of municipal solid waste: Challenges and perspectives. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 280:111742. [PMID: 33308930 DOI: 10.1016/j.jenvman.2020.111742] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/12/2020] [Accepted: 11/24/2020] [Indexed: 05/12/2023]
Abstract
The anaerobic digestion is a well-established process for the treatment of organic solid waste, pursuing its conversion into a methane rich gas destined to energy generation. Research has largely dealt with the enhancement of the overall bioconversion yields, providing several strategies to maximize the production of bio-methane from the anaerobic processing of a wide variety of substrates. Nevertheless, the valorization of the process effluents should be pursued as well, especially if the anaerobic digestion is regarded in the light of the circular economy principles. Aim of this work is in identifying the state of the art of the strategies to manage the digestate from the anaerobic processing of the organic fractions of municipal solid waste. Conventional approaches are described and novel solutions are figured out in order to highlight their potential scale up as well as to address future research perspectives.
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Affiliation(s)
- Alessandra Cesaro
- Department of Civil, Architectural and Environmental Engineering, University of Napoli Federico II, via Claudio 21, 80125, Napoli, Italy.
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26
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Mahmudul HM, Rasul MG, Akbar D, Narayanan R, Mofijur M. A comprehensive review of the recent development and challenges of a solar-assisted biodigester system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141920. [PMID: 32889316 DOI: 10.1016/j.scitotenv.2020.141920] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/20/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
The extensive use of fossil fuels and the environmental effect of their combustion products have attracted researchers to look into renewable energy sources. In addition, global mass production of waste has motivated communities to recycle and reuse the waste in a sustainable way to lower landfill waste and associated problems. The development of waste to energy (WtE) technology including the production of bioenergy, e.g. biogas produced from various waste through Anaerobic Digestion (AD), is considered one of the potential measures to achieve the sustainable development goals of the United Nations (UN). Therefore, this study reviews the most recent studies from relevant academic literature on WtE technology (particularly AD technology) for biogas production and the application of a solar-assisted biodigester (SAB) system aimed at improving performance. In addition, socio-economic factors, challenges, and perspectives have been reported. From the analysis of different technologies, further work on effective low-cost technologies is recommended, especially using SAB system upgrading and leveraging the opportunities of this system. The study found that the performance of the AD system is affected by a variety of factors and that different approaches can be applied to improve performance. It has also been found that solar energy systems efficiently raise the biogas digester temperature and through this, they maximize the biogas yield under optimum conditions. The study revealed that the solar-assisted AD system produces less pollution and improves performance compared to the conventional AD system.
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Affiliation(s)
- H M Mahmudul
- School of Engineering and Technology, Central Queensland University, QLD 4701, Australia; Clean Energy Academy, Central Queensland University, QLD 4701, Australia.
| | - M G Rasul
- School of Engineering and Technology, Central Queensland University, QLD 4701, Australia; Clean Energy Academy, Central Queensland University, QLD 4701, Australia
| | - D Akbar
- School of Business and Law, Central Queensland University, QLD 4701, Australia
| | - R Narayanan
- School of Engineering and Technology, Central Queensland University, QLD 4701, Australia; Clean Energy Academy, Central Queensland University, QLD 4701, Australia
| | - M Mofijur
- School of Information, Systems and Modelling, University of Technology Sydney, NSW 2007, Australia; Mechanical Engineering Department, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia
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27
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Basinas P, Rusín J, Chamrádová K. Assessment of high-solid mesophilic and thermophilic anaerobic digestion of mechanically-separated municipal solid waste. ENVIRONMENTAL RESEARCH 2021; 192:110202. [PMID: 32931788 DOI: 10.1016/j.envres.2020.110202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/12/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
Mechanically-sorted organic fraction of municipal solid waste (OFMSW) was tested to determine its biogas and biomethane generation efficiency. Methane production capability of OFMSW was examined in biochemical methane potential (BMP) tests. The factors affecting the high-solid anaerobic digestion (AD) of feedstock were investigated in a series of long-term semi-continuous digestion tests performed at dry mesophilic and thermophilic conditions in a continuously rotating drum reactor with working volume of 0.013 m3. OFMSW presented low biogas and methane generation capacity due to its contained non-biodegradable components and the low proteins and starch proportions. Dry mesophilic AD allowed only a relatively limited fraction of OFMSW volatile solids to be consumed for biogas and methane production. Reducing particle size favoured utilization of higher proportions of the available digestible organic substances, and concurrently promoted biogas and biomethane generation rate. Stability of methane generation was also significantly improved by particle downsizing. Small particles compensated the limited mass transfer and restricted distribution of methane production intermediate metabolites caused by water absence in the dry AD system. Dry thermophilic AD converted sufficient quantity of OFMSWs biodegradable content. The average methane released from dry thermophilic AD (0.176 m3kgVS-1) was higher than that of dry mesophilic AD of fine particles (0.148 m3kgVS-1) and much higher than that of dry mesophilic AD of same grain size (0.114 m3kgVS-1). High temperature proved more suitable for anaerobically digesting mechanically-sorted OFMSW.
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Affiliation(s)
- Panagiotis Basinas
- Institute of Environmental Technology, VSB - Technical University of Ostrava, 17. Listopadu 2172/15, Ostrava, Poruba, 708 00, Czech Republic
| | - Jiří Rusín
- Institute of Environmental Technology, VSB - Technical University of Ostrava, 17. Listopadu 2172/15, Ostrava, Poruba, 708 00, Czech Republic
| | - Kateřina Chamrádová
- Institute of Environmental Technology, VSB - Technical University of Ostrava, 17. Listopadu 2172/15, Ostrava, Poruba, 708 00, Czech Republic.
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28
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Adami L, Schiavon M, Torretta V, Costa L, Rada EC. Evaluation of conventional and alternative anaerobic digestion technologies for applications to small and rural communities. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 118:79-89. [PMID: 32891026 DOI: 10.1016/j.wasman.2020.08.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/13/2020] [Accepted: 08/14/2020] [Indexed: 06/11/2023]
Abstract
The management of food waste has been considered an extremely important issue since the 1990s but finding efficient solutions for small and rural communities is still challenging. Anaerobic digestion (AD) may provide interesting opportunities in terms of carbon emissions and economic payback in the long term, but the choice of the correct technology and the spatial scale requires attention. The focus of this study is on a small rural municipality, which is selected as a case study to assess the environmental and economic sustainability of the application of two options for AD (a conventional and an alternative wet process) and two spatial scales (municipality and a consortium of municipalities). Both the AD configurations are examined in terms of biogas exploitation, through a combined heat and power generator, and in combination with a post-composting stage of the digestate. From economic and environmental perspectives, the consortium-scale application of the conventional wet process is expected to generate greater benefits in the long term, as it enables 80% more electric energy production and economic revenues/savings, and avoids carbon emissions. However, before selecting the technology, decision makers should consider the public acceptance of local communities (e.g., the susceptibility to the "not-in-my-backyard" syndrome), as the best technical-economical solution may not be the most appropriate to specific communities. The methodology developed in this paper and the discussion of the results will inform decision makers about how to identify the most appropriate alternative for their purposes.
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Affiliation(s)
- Luca Adami
- University of Trento, Department of Civil, Environmental and Mechanical Engineering, Via Mesiano 77, 38123 Trento, Italy; University of Insubria, Department of Theoretical and Applied Sciences, Via G.B. Vico, 46, 21100 Varese, Italy.
| | - Marco Schiavon
- University of Trento, Department of Civil, Environmental and Mechanical Engineering, Via Mesiano 77, 38123 Trento, Italy; University of Insubria, Department of Theoretical and Applied Sciences, Via G.B. Vico, 46, 21100 Varese, Italy.
| | - Vincenzo Torretta
- University of Insubria, Department of Theoretical and Applied Sciences, Via G.B. Vico, 46, 21100 Varese, Italy.
| | - Luca Costa
- University of Trento, Department of Civil, Environmental and Mechanical Engineering, Via Mesiano 77, 38123 Trento, Italy.
| | - Elena Cristina Rada
- University of Insubria, Department of Theoretical and Applied Sciences, Via G.B. Vico, 46, 21100 Varese, Italy.
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29
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Meng X, Sui Q, Liu J, Yu D, Wang Y, Wei Y. Relieving ammonia inhibition by zero-valent iron (ZVI) dosing to enhance methanogenesis in the high solid anaerobic digestion of swine manure. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 118:452-462. [PMID: 32977305 DOI: 10.1016/j.wasman.2020.08.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 07/20/2020] [Accepted: 08/15/2020] [Indexed: 06/11/2023]
Abstract
Relieving from ammonia inhibition and enhancing the utilization of thermodynamically unfavorable propionate are crucial for methane harvest in the high solid anaerobic digestion (HSAD) of ammonia-rich swine manure. In this study, the potential of dosing zero-valent iron (ZVI, 150 um) for enhancing the methanogenesis to resist total ammonia (TAN) over 5.0 g-N·L-1 was investigated via batch experiments under mesophilic condition. The cumulative methane production was enhanced by 22.2% at ≥160 mM ZVI dosage and the HSAD duration was further shortened by 50.6% at ≥320 mM ZVI dosage. The enhanced methanogenesis was mainly resulted from the full utilization of propionate and the accelerated collapse of posterior-biodegradable organics which might be driven by ZVI. Results of microbial community and qPCR (mcrA) showed that ZVI might trigger the blooming of Methanosarcina (from 27.9% to 78.3%) and Syntrophomonas (0.5% to 3.7%) and attribute to their possible direct interspecies electron transfer (DIET) to enhance propionate utilization. Besides, the main methanogenesis might remain in the effective aceticlastic pathway even under free ammonia (FAN) almost 1.0 g-N·L-1 because syntrophic acetate oxidizing bacteria (SAOB) decreased to almost none at 320 mM ZVI dosage. Dosing ZVI could relieve HSAD from TAN inhibition and more dosage was required to resist FAN inhibition.
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Affiliation(s)
- Xiaoshan Meng
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
| | - Qianwen Sui
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jibao Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Dawei Yu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yawei Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yuansong Wei
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Energy, Jiangxi Academy of Sciences, Nanchang 330029, China.
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30
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Abstract
There is a growing need of substrate flexibility for biobased production of energy and value-added products that allows the application of variable biodegradable residues within a circular economy. It can be used to balance fluctuating energy provision of other renewable sources. Hydrolysis presents one of the biggest limitations during anaerobic digestion. Methods to improve it will result in broader process applicability and improved integration into regional material cycles. Recently, one focus of anaerobic digestion research has been directed to systems with a separate hydrolysis–acidogenesis stage as it might be promised to improve process performance. Conditions can be adjusted to each class of microorganisms individually without harming methanogenic microorganisms. Extensive research of separate biomass pretreatment via biological, chemical, physical or mixed methods has been conducted. Nevertheless, several methods lack economic efficiency, have a high environmental impact or focus on specific substrates. Pretreatment via a separate hydrolysis stage as cell-driven biotransformation in a suspension might be an alternative that enables high yields, flexible feeding and production, and a better process control. In this review, we summarize existing technologies for microbial hydrolytic biotransformation in a separate reactor stage and the impacts of substrate, operational parameters, combined methods and process design as well as remaining challenges.
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31
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Simioni T, Agustini CB, Dettmer A, Gutterres M. Nutrient balance for anaerobic co-digestion of tannery wastes: Energy efficiency, waste treatment and cost-saving. BIORESOURCE TECHNOLOGY 2020; 308:123255. [PMID: 32251859 DOI: 10.1016/j.biortech.2020.123255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/21/2020] [Accepted: 03/24/2020] [Indexed: 06/11/2023]
Abstract
The macronutrients ratio present in tannery wastes is normally not ideal for anaerobic digestion (AD). In most cases, it is necessary to add nutrients to obtain a more balanced AD process and to ensure favorable conditions for the growth and metabolism of microorganisms. The aim of this study was to verify the influence of the components of nutrient solution added to AD of tannery wastes with regard to the energy and waste treatment efficiency and to the cost-saving analysis. The findings provides better understanding of the nutritional requirement of co-AD of tannery wastes, with the highest value of biogas production of 30.14 mL/g of added VSS, besides representing a step in the search for a more balanced, efficient and viable process. The results obtained proving the competitiveness of co-AD of tannery wastes instead of disposing it in landfills (saving off about 71% in terms of electric consumption).
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Affiliation(s)
- Taysnara Simioni
- Laboratory for Leather and Environmental Studies - LACOURO, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
| | - Caroline Borges Agustini
- Laboratory for Leather and Environmental Studies - LACOURO, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
| | - Aline Dettmer
- Chemical Engineering Course, Post-Graduation Program in Science and Food Technology, University of Passo Fundo, Brazil.
| | - Mariliz Gutterres
- Laboratory for Leather and Environmental Studies - LACOURO, Chemical Engineering Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
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32
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Xu Q, Qin J, Yuan T, Ko JH. Extracellular enzyme and microbial activity in MSW landfills with different gas collection and leachate management practices. CHEMOSPHERE 2020; 250:126264. [PMID: 32105861 DOI: 10.1016/j.chemosphere.2020.126264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 02/04/2020] [Accepted: 02/17/2020] [Indexed: 06/10/2023]
Abstract
The performance of simulated municipal solid waste (MSW) landfills with two different biogas collection practices - (1) upward and upward-downward biogas flow collection (LT-TB) in sequence and (2) simultaneous upward-downward biogas flow collection (LTB) from the beginning of the anaerobic degradation process - was investigated in terms of landfill gas and leachate, enzyme activity, and microbial community structure associated with MSW compression and leachate recirculation. The cumulative methane volume in LTB was 1.5 times higher than that in LT-TB. With MSW compression and leachate recirculation, amylase and lipase activity were enhanced in LTB. In LT-TB, the activities gradually decreased after reaching a peak with compression. The two biogas collection strategies influenced the community structure and activity of bacteria and archaea. The upward and downward gas collection flow with waste compression and leachate recirculation improved the environment for enriching bacterial phyla Firmicutes, Proteobacteria, and Synergistetes and genus Methanosarcina in Archaea.
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Affiliation(s)
- Qiyong Xu
- Key Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong, 518055, China
| | - Jie Qin
- Key Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong, 518055, China
| | - Tugui Yuan
- Key Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, Guangdong, 518055, China
| | - Jae Hac Ko
- Department of Environmental Engineering, College of Ocean Sciences, Jeju National University, Jeju Special Self-Governing Province, 63243, Republic of Korea.
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33
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Xue S, Qiu L, Guo X, Yao Y. Effect of liquid digestate recirculation on biogas production and enzyme activities for anaerobic digestion of corn straw. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 82:144-156. [PMID: 32910799 DOI: 10.2166/wst.2020.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
To accelerate the degradation of substrate, 50% liquid digestate recirculation (LDR) was used in the anaerobic digestion (AD) of corn straw. The effects of recirculation on the enzyme activities and biogas production were investigated by comparing with control reactor (ReactorCK). During the AD process, the fermentation system with 50% LDR was more stable. The average biogas and methane production in ReactorLDR were 7,891 mL·d-1 and 347 mL CH4·g-1 VSadded·d-1 respectively. The total volatile fatty acids (TVFAs) concentration in the two reactors both increased at first and then decreased with time. The LDR made the VFAs accumulation significant, especially propionic acid accumulation in 4 ∼ 16 days. The maximum peak value of cellulase, xylanase, dehydrogenase and coenzyme F420 activities in ReactorLDR were 0.51 mg·g-1·h-1, 0.29 mg·g-1·h-1, 4.88 mL·g-1·h-1 and 6.69 μmol·L-1, respectively, which were higher than that in ReactorCK. With or without recirculation, the concentration of TVFAs was positively correlated with cellulase, xylanase and dehydrogenase activities, while was negatively correlated with coenzyme F420 activity. Besides, a very significant correlation existed between hydrolase and dehydrogenase activities and daily biogas production in ReactorCK. And the peaks of cellulase, xylanase and dehydrogenase activities appeared ahead of the peak of daily biogas production with the LDR.
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Affiliation(s)
- Shuaixing Xue
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China and Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling 712100, China E-mail:
| | - Ling Qiu
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China and Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling 712100, China E-mail:
| | - Xiaohui Guo
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China and Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling 712100, China E-mail:
| | - Yiqing Yao
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China and Western Scientific Observation and Experiment Station of Development and Utilization of Rural Renewable Energy of Ministry of Agriculture, Northwest A&F University, Yangling 712100, China E-mail:
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34
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Dhanya BS, Mishra A, Chandel AK, Verma ML. Development of sustainable approaches for converting the organic waste to bioenergy. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 723:138109. [PMID: 32229385 DOI: 10.1016/j.scitotenv.2020.138109] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/09/2020] [Accepted: 03/20/2020] [Indexed: 05/22/2023]
Abstract
Dependence on fossil fuels such as oil, coal and natural gas are on alarming increase, thereby causing such resources to be in a depletion mode and a novel sustainable approach for bioenergy production are in demand. Successful implementation of zero waste discharge policy is one such way to attain a sustainable development of bioenergy. Zero waste discharge can be induced only through the conversion of organic wastes into bioenergy. Waste management is pivotal and considering its importance of minimizing the issue and menace of wastes, conversion strategy of organic waste is effectively recommended. Present review is concentrated on providing a keen view on the potential organic waste sources and the way in which the bioenergy is produced through efficient conversion processes. Biogas, bioethanol, biocoal, biohydrogen and biodiesel are the principal renewable energy sources. Different types of organic wastes used for bioenergy generation and its sources, anaerobic digestion-biogas production and its related process affecting parameters including fermentation, photosynthetic process and novel nano-inspired techniques are discussed. Bioenergy production from organic waste is associated with mitigation of lump waste generation and its dumping into land, specifically reducing all hazards and negativities in all sectors during waste disposal. A sustainable bioenergy sector with upgraded security for fuels, tackles the challenging climatic change problem also. Thus, intensification of organic waste conversion strategies to bioenergy, specially, biogas and biohydrogen production is elaborated and analyzed in the present article. Predominantly, persistent drawbacks of the existing organic waste conversion methods have been noted, providing consideration to economic, environmental and social development.
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Affiliation(s)
- B S Dhanya
- Department of Biotechnology, Udaya School of Engineering, Udaya Nagar, Kanyakumari, Tamil Nadu 629 204, India
| | - Archana Mishra
- Sustainable Agriculture Division, The Energy and Resources Institute, New Delhi, India
| | - Anuj K Chandel
- Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Brazil
| | - Madan L Verma
- Department of Biotechnology, School of Basic Sciences, Indian Institute of Information Technology, Una, Himachal Pradesh, India.
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35
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Choi HJ. Acid-fermented fish by-products broth: An influence to sludge reduction and biogas production in an anaerobic co-digestion. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 262:110305. [PMID: 32250789 DOI: 10.1016/j.jenvman.2020.110305] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 01/30/2020] [Accepted: 02/18/2020] [Indexed: 05/25/2023]
Abstract
This study investigates the effects of anaerobic co-digestion of a fishery by-products broth (FFB) mixed with sewage sludge on biogas production and sludge reduction. A 5:5 mixing ratio of sewage sludge and FFB generated the highest removal efficiency of volatile solids (VS) (51.3%), total solids (TS) (48.7%) and chemical oxygen demand (COD) (51.3%). In addition, the highest biogas production (0.585 L/g·VSin·d) was also achieved with a mixing ratio of 5:5, followed 0.305 L/g·VSin·d for 7:3. The methane content in produced biogas was associated more than 70% with ratios of 7:3 and 5:5. Moreover, the 5:5 ratio produced the greatest amount of the energy recovered at 4.1 kWh, followed by the 7:3 mixing ratio at 3.4 kWh. Therefore, the mixing ratio from 7:3 to 5:5 for anaerobic co-digestion of sewage sludge and FFB may be suitable for biogas production and organic matter removal. However, a 5:5 mixing ratio is recommended for anaerobic digestion of sewage sludge and FFB because it has the highest digestion efficiency, can treat larger quantities of fish by-products, and can recover the most energy. Biogas produced by mixing FFB with sewage sludge opens up the possibility of biogas production using organic waste because of the higher methane content.
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Affiliation(s)
- Hee-Jeong Choi
- Department of Biosystems and Convergence Engineering, Catholic Kwandong University, South Korea.
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Wainaina S, Awasthi MK, Sarsaiya S, Chen H, Singh E, Kumar A, Ravindran B, Awasthi SK, Liu T, Duan Y, Kumar S, Zhang Z, Taherzadeh MJ. Resource recovery and circular economy from organic solid waste using aerobic and anaerobic digestion technologies. BIORESOURCE TECHNOLOGY 2020; 301:122778. [PMID: 31983580 DOI: 10.1016/j.biortech.2020.122778] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
With the inevitable rise in human population, resource recovery from waste stream is becoming important for a sustainable economy, conservation of the ecosystem as well as for reducing the dependence on the finite natural resources. In this regard, a bio-based circular economy considers organic wastes and residues as potential resources that can be utilized to supply chemicals, nutrients, and fuels needed by mankind. This review explored the role of aerobic and anaerobic digestion technologies for the advancement of a bio-based circular society. The developed routes within the anaerobic digestion domain, such as the production of biogas and other high-value chemicals (volatile fatty acids) were discussed. The potential to recover important nutrients, such as nitrogen through composting, was also addressed. An emphasis was made on the innovative models for improved economics and process performance, which include co-digestion of various organic solid wastes, recovery of multiple bio-products, and integrated bioprocesses.
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Affiliation(s)
- Steven Wainaina
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
| | - Surendra Sarsaiya
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, PR China
| | - Hongyu Chen
- Institute of Biology, Freie Universität Berlin Altensteinstr. 6, 14195 Berlin, Germany
| | - Ekta Singh
- CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440 020, Maharashtra, India
| | - Aman Kumar
- CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440 020, Maharashtra, India
| | - B Ravindran
- Department of Environmental Energy and Engineering, Kyonggi University Youngtong-Gu, Suwon, Gyeonggi-Do 16227, South Korea
| | - Sanjeev Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Tao Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Yumin Duan
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
| | - Sunil Kumar
- CSIR-National Environmental Engineering Research Institute, Nehru Marg, Nagpur 440 020, Maharashtra, India
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China
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Lu JS, Chang JS, Lee DJ. Adding carbon-based materials on anaerobic digestion performance: A mini-review. BIORESOURCE TECHNOLOGY 2020; 300:122696. [PMID: 31928924 DOI: 10.1016/j.biortech.2019.122696] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 12/21/2019] [Accepted: 12/23/2019] [Indexed: 06/10/2023]
Abstract
The anaerobic digestion is the adopted to remediate the pollutant and extract the bioenergy from the waste during the treatment. Effects of adding carbon-based materials on enhancement of digestion performance are studied in literature. This paper provided a mini review on the current research efforts on the traditional view on the cytotoxicity of carbon-based materials to the aquatic microorganisms and the novel "adding carbon-based material strategy" for improving the anaerobic digestion performances. The further research needs for comprehending the interactions between the added carbon materials, the substrates and the microorganisms and the impacts of adopting these additives on full-scale operations were highlighted.
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Affiliation(s)
- Jia-Shun Lu
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Jo-Shu Chang
- College of Engineering, Tunghai University, Taichung 40704, Taiwan
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; College of Engineering, Tunghai University, Taichung 40704, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; College of Technology and Engineering, National Taiwan Normal University, Taipei 10610, Taiwan.
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What Could China Give to and Take from Other Countries in Terms of the Development of the Biogas Industry? SUSTAINABILITY 2020. [DOI: 10.3390/su12041490] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Anaerobic digestion is one of the most sustainable and promising technologies for the management of organic residues. China plays an important role in the world’s biogas industry and has accumulated rich and valuable experience, both positive and negative. The country has established relatively complete laws, policies and a subsidy system; its world-renowned standard system guarantees the implementation of biogas projects. Its prefabricated biogas industry has been developed, and several biogas-linked agricultural models have been disseminated. Nonetheless, the subsidy system in China’s biogas industry is inflexible and cannot lead to marketization, unlike that of its European counterpart. Moreover, the equipment and technology levels of China’s biogas industry are still lagging and underdeveloped. Mono-digestion, rather than co-digestion, dominates the biogas industry. In addition, biogas upgrading technology is immature, and digestate lacks planning and management. China’s government subsidy is reconsidered in this work, resulting in the recommendation that subsidy should be based on products (i.e., output-oriented) instead of only input subsidy for construction. The policy could focus on the revival of abandoned biogas plants as well.
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Zhang C, Hu C, Cao W, Wang M, Hou F, Yu A, Xie H, Lou J, Sun C, Liu R. Essential regulators of iron chemical speciation distributions in anaerobic digestion of pretreated food waste: Organic volatile fatty acids or inorganic acid radicals? BIORESOURCE TECHNOLOGY 2019; 293:122051. [PMID: 31472405 DOI: 10.1016/j.biortech.2019.122051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
In this work, a 30-days batched mesophilic assay on pretreated food waste (PFW) under different inoculum/substrate (I/S) ratios (1:5, 1:2, 1:1, 2:1, 4:1 and 1:0) was carried out, to target the most important parameters in AD matrix on regulating iron (Fe) chemical speciation. Correlation coefficients were calculated within four Fe chemical forms and AD parameters of pH, volatile fatty acids (VFAs), inorganic acid radicals (IARs), and alkalinity. Results showed that IARs were not key factors on regulating Fe speciation. Without acidification, IARs showed weak correlations (coefficients < 0.40) with Fe chemical dynamics while other parameters showed stronger correlations (coefficients ≥ 0.60). Under acidification, VFAs initiated the conversion of exchangeable Fe into water soluble fraction. Residual fraction might play important role in regulating Fe shifting to more bioavailable states.
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Affiliation(s)
- Chang'ai Zhang
- School of Environment and Natural Resources, Zhejiang University of Science & Technology, Hangzhou, Zhejiang Province 310023, People's Republic of China; Key Laboratory of Recycling and Ecological Treatment of Waste Biomass of Zhejiang Province, Zhejiang University of Science & Technology, Hangzhou, Zhejiang Province 310023, People's Republic of China
| | - Changwei Hu
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Weixing Cao
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Mimi Wang
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Fang Hou
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Aiai Yu
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Hongli Xie
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Jiale Lou
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China
| | - Chen Sun
- College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing, Zhejiang Province 314001, People's Republic of China.
| | - Ronghou Liu
- Biomass Energy Engineering Research Centre, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China
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Challenges and An Implementation Framework for Sustainable Municipal Organic Waste Management Using Biogas Technology in Emerging Asian Countries. SUSTAINABILITY 2019. [DOI: 10.3390/su11226331] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Due to its ability to recover both material and energy from organic waste, biogas technology is considered the best technology for treating organic waste. While in many emerging Asian countries more than 50% of municipal waste is organic waste, the amount of organic waste treated with biogas technology remains very limited. This study identified key challenges faced by practitioners in sustaining biogas plants from literature and interviewed a number of sustainably operating biogas plant managers and, based on the findings, developed an implementation framework to help decision makers and practitioners in planning a sustainable municipal organic waste biogas plant facility.
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Lee YJ, Lee DJ. Impact of adding metal nanoparticles on anaerobic digestion performance - A review. BIORESOURCE TECHNOLOGY 2019; 292:121926. [PMID: 31409520 DOI: 10.1016/j.biortech.2019.121926] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/25/2019] [Accepted: 07/27/2019] [Indexed: 06/10/2023]
Abstract
Anaerobic digestion is the most widely adopted biological waste treatment processes with renewable energy production. The effects of adding metal nanoparticles (NPs) on improving digestion performance are well noted. This paper reviewed the traditional view on the cytotoxicity of NPs to living organisms and the contemporary view of mechanisms for enhancement in anaerobic digestion performance in the presence of metal NPs. The complicated interactions acquire further studies for comprehending the physical and chemical interactions of metal NPs to the constituent compounds and to the living cells, and the involvement of mechanisms such as direct interspecies electron transfer for better design and control of the "NP strategy" for anaerobic digestion performance enhancement.
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Affiliation(s)
- Yu-Jen Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Duu-Jong Lee
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; College of Technology and Engineering, National Taiwan Normal University, Taipei 10610, Taiwan.
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Mirmohamadsadeghi S, Karimi K, Tabatabaei M, Aghbashlo M. Biogas production from food wastes: A review on recent developments and future perspectives. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.100202] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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