1
|
Chandra GV, Golla SY, Ghosh PK. Review of soil environment quality in India near coal mining regions: current and future predictions. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:194. [PMID: 38695957 DOI: 10.1007/s10653-024-01968-7] [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: 01/25/2024] [Accepted: 03/25/2024] [Indexed: 05/14/2024]
Abstract
Production and utilization of coal are one of the primary routes of accumulation of Toxic Elements (TEs) in the soil. The exploration of trends in the accumulation of TEs is essential to establishing a soil pollution strategy, implementing cost-effective remediation, and early warnings of ecological risks. This study provides a comprehensive review of soil concentrations and future accumulation trends of various TEs (Cr, Ni, Pb, Co, Cu, Cd, Zn, Fe, Mn, and As) in Indian coal mines. The findings revealed that average concentrations of Cr, Mn, Ni, Cu, Zn, Pb, and Co surpass India's natural background soil levels by factors of 2, 4.05, 5.32, 1.77, 9.6, and 6.15, respectively. Geo-accumulation index values revealed that 27.3%, 14.3%, and 7.7% of coal mines are heavily polluted by Ni, Co, and Cu, respectively. Also, the Potential Ecological Risk Index indicates that Cd and Ni are primary contaminants in coal mines. Besides, the health risk assessment reveals oral ingestion as the main exposure route for soil TMs. Children exhibit a higher hazard index than adults, with Pb and Cr being major contributors to their non-carcinogenic risk. In addition, carcinogenic risks exist for females and children, with Cr and Cu as primary contributors. Multivariate statistical analysis revealed that TEs (except Cd) accumulated in the soil from anthropogenic sources. The assessment of future accumulation trends in soil TE concentrations reveals dynamic increases that significantly impact both the ecology and humans at elevated levels. This study signifies a substantial improvement in soil quality and risk management in mining regions.
Collapse
|
2
|
Block JB, Michels M, Mußhoff O, Hermann D. How to reduce the carbon footprint of the agricultural sector? Factors influencing farmers' decision to participate in carbon sequestration programs. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 359:121019. [PMID: 38701586 DOI: 10.1016/j.jenvman.2024.121019] [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: 01/08/2024] [Revised: 04/17/2024] [Accepted: 04/23/2024] [Indexed: 05/05/2024]
Abstract
Mitigating climate change by sequestering carbon in agricultural soils through humus formation is a crucial component of sustainable agriculture. Humus programs that are designed to incentivize farmers to build more humus are still recent innovations, so current knowledge about farmers' motivation to participate is limited. This study examines the adoption of non-governmental humus programs to promote carbon sequestration by analyzing farmers' willingness to participate in humus programs and influential factors. We specifically investigate behavioral factors underlying farmers' adoption of humus programs using the Theory of Planned Behavior. To this end, we collected data using an online survey with 190 German farmers and applied partial least squares structural equation modeling. The results show that (i) perceived economic benefits, (ii) the actions of fellow farmers, and (iii) farmers' sense of responsibility with regard to climate change have a statistically significant influence on farmers' intention to participate in a humus program. In contrast, the perceived ecological benefits, political pressure, the possibility of establishing humus-building measures, and prior knowledge of humus programs have no statistically significant influence. Our findings suggest that farmers' decision to participate in humus programs is strongly influenced by the financial benefits, but the actions and thoughts of other farmers, as well as their own moral claims regarding climate change, also play a crucial role. We found that farmers lack knowledge about the registration and general functioning of humus programs, which can currently be one of the biggest barriers to participation in such initiatives.
Collapse
Affiliation(s)
- Julia B Block
- Department of Agricultural Economics and Rural Development, Georg-August-University Goettingen, Platz der Goettinger Sieben 5, 37073, Goettingen, Germany.
| | - Marius Michels
- Department of Agricultural Economics and Rural Development, Georg-August-University Goettingen, Platz der Goettinger Sieben 5, 37073, Goettingen, Germany.
| | - Oliver Mußhoff
- Department of Agricultural Economics and Rural Development, Georg-August-University Goettingen, Platz der Goettinger Sieben 5, 37073, Goettingen, Germany.
| | - Daniel Hermann
- Institute for Food- and Resource Economics, Rheinische Friedrich-Wilhelms-University Bonn, Nussallee 19, 53115, Bonn, Germany.
| |
Collapse
|
3
|
Rasaq WA, Thiruchenthooran V, Telega P, Bobak Ł, Igwegbe CA, Białowiec A. Optimizing hydrothermal treatment for sustainable valorization and fatty acid recovery from food waste. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 357:120722. [PMID: 38569260 DOI: 10.1016/j.jenvman.2024.120722] [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: 10/31/2023] [Revised: 02/26/2024] [Accepted: 03/19/2024] [Indexed: 04/05/2024]
Abstract
This study employs response surface methodology and a central composite design (CCD) to optimize hydrothermal treatment (HTT) conditions for the valorization of food waste (FW). Lab-scale pressure reactor-based HTT processes are investigated to detect the effects of temperature (220-340 °C) and resident time (90-260 min) on elemental composition and fatty acid recovery in the hydrothermal liquid. Central to the study is the identification of temperature as the primary factor influencing food waste conversion during the HTT process, showcasing its impact on HTT product yields. The liquid fraction, rich in saturated fatty acids (SFA), demonstrates a temperature-dependent trend, with higher temperatures favoring SFA recovery. Specifically, HTT at 340 °C in 180 min exhibits the highest SFA percentages, reaching up to 52.5 wt%. The study establishes HTT as a promising avenue for nutrient recovery, with the liquid fraction yielding approximately 95% at optimized conditions. Furthermore, statistical analysis using response surface methodology predicts the optimal achievable yields for hydrochar and hydrothermal liquid at 6.15% and 93.85%, respectively, obtained at 320 °C for 200 min.
Collapse
Affiliation(s)
- Waheed A Rasaq
- Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 37a Chełmońskiego Str., 51-630 Wrocław, Poland.
| | - Vaikunthavasan Thiruchenthooran
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland.
| | - Paweł Telega
- Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 37a Chełmońskiego Str., 51-630 Wrocław, Poland.
| | - Łukasz Bobak
- Department of Functional Food Products Development, Wroclaw University of Environmental and Life Sciences, 51-630, Wrocław, Poland.
| | - Chinenye Adaobi Igwegbe
- Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 37a Chełmońskiego Str., 51-630 Wrocław, Poland; Department of Chemical Engineering, Nnamdi Azikiwe University, P.M.B. 5025, Awka 420218, Nigeria.
| | - Andrzej Białowiec
- Department of Applied Bioeconomy, Wrocław University of Environmental and Life Sciences, 37a Chełmońskiego Str., 51-630 Wrocław, Poland.
| |
Collapse
|
4
|
Zhang Z, Zhong W, Tan D, Cui S, Pan M, Zhao Z, Zhang J, Hu J. Hydrocarbon adsorption mechanism of modern automobile engines and methods of reducing hydrocarbon emissions during cold start process: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 353:120188. [PMID: 38308990 DOI: 10.1016/j.jenvman.2024.120188] [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: 09/21/2023] [Revised: 01/04/2024] [Accepted: 01/20/2024] [Indexed: 02/05/2024]
Abstract
With the global emphasis on environmental protection and increasingly stringent emission regulations for internal combustion engines, there is an urgent need to overcome the problem of large hydrocarbon (HC) emissions caused by unstable engine cold starts. Synergistic engine pre-treatment (reducing hydrocarbon production) as well as after-treatment devices (adsorbing and oxidizing hydrocarbons) is the fundamental solution to emissions. In this paper, the improvement of hydrocarbon emissions is summarized from two aspects: pre-treatment and after-treatment. The pre-treatment for engine cold start mainly focuses on summarizing the intake control, fuel, and engine timing parameters. The after-treatment mainly focuses on summarizing different types of adsorbents and modifications (mainly including different molecular sieve structures and sizes, preparation conditions, silicon aluminum ratio, ion exchange modification, and heterogeneity, etc.), adsorptive catalysts (mainly including optimization of catalytic performance and structure), and catalytic devices (mainly including coupling with thermal management equipment and HC trap devices). In this paper, a SWOT (strength, weakness, opportunity, and threat) analysis of pre-treatment and after-treatment measures is conducted. Researchers can obtain relevant research results and seek new research directions and approaches for controlling cold start HC emissions.
Collapse
Affiliation(s)
- Zhiqing Zhang
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Weihuang Zhong
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Dongli Tan
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Shuwan Cui
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China.
| | - Mingzhang Pan
- Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning, 530004, China
| | - Ziheng Zhao
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Jian Zhang
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Jingyi Hu
- Liuzhou Key Laboratory of Automobile Exhaust Control Technology, Guangxi University of Science and Technology, Liuzhou, 545006, China
| |
Collapse
|
5
|
Wu R, Lv P, Liu B, Bai Y, Wang J, Wei J, Su W, Xu G, Bao W, Yu G. Aromatics production from relay catalytic pyrolysis of cow manure using Ru/C and ZSM-5 dual catalysts synthesized from coal gasification fine slag. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119356. [PMID: 37883835 DOI: 10.1016/j.jenvman.2023.119356] [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: 07/06/2023] [Revised: 09/25/2023] [Accepted: 10/14/2023] [Indexed: 10/28/2023]
Abstract
Resource utilization of solid waste can aid in gradual substitution of fossil fuels while achieving waste recycling. In this study, residual carbon and ash slag from the coal gasification fine slag were separated by froth flotation, and then was used to prepare Ru/C and ZSM-5 dual catalysts with carbon-rich and ash-rich components as raw materials, respectively. The performance of two catalysts for catalytic upgrading of volatiles from pyrolysis of cow manure (CM) to produce light aromatic hydrocarbons was systematically investigated. The direct pyrolysis products of CM mainly included alcohols, ketones, ethers, and other oxygen-containing compounds. When ZSM-5 was used as the catalyst, the yield of monocyclic aromatic hydrocarbons (MAHs) increased significantly due to the better catalytic cracking and aromatization abilities of ZSM-5 catalyst. However, the yield of phenols in the pyrolysis products improved when Ru/C was used as the catalyst due to the cleavage effect of Ru/C on the C-O bond. When Ru/C and ZSM-5 were used as dual catalysts in relay catalytic pyrolysis of volatiles, the increase in MAHs yield in the pyrolysis product was higher than the total increase obtained under Ru/C and ZSM-5 single catalysis. The possible pathways for the generation of MAHs from CM under Ru/C and ZSM-5 relay catalytic pyrolysis were revealed by the pyrolysis experiment performed on model compounds.
Collapse
Affiliation(s)
- Ruofei Wu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Peng Lv
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China.
| | - Bin Liu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Yonghui Bai
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Jiaofei Wang
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Juntao Wei
- Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Weiguang Su
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China
| | - Guangyu Xu
- Shandong Yankuangguotuo Science & Engineering Co., Ltd., Zoucheng, 273500, China
| | - Weina Bao
- Shandong Yankuangguotuo Science & Engineering Co., Ltd., Zoucheng, 273500, China
| | - Guangsuo Yu
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan, 750021, China; Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, 200237, China.
| |
Collapse
|
6
|
Kwapinska M, Pisano I, Leahy JJ. Hydrothermal carbonization of milk/dairy processing sludge: Fate of plant nutrients. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 345:118931. [PMID: 37688960 DOI: 10.1016/j.jenvman.2023.118931] [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: 06/16/2023] [Revised: 08/24/2023] [Accepted: 09/02/2023] [Indexed: 09/11/2023]
Abstract
Dairy processing sludge (DPS) is a byproduct generated in wastewater treatment plants located in dairy (milk) processing companies (waste activated sludge). DPS presents challenges in terms of its management (as biosolids) due to its high moisture content, prolonged storage required, uncontrolled nutrient loss and accumulation of certain substances in soil in the proximity of dairy companies. This study investigates the potential of hydrothermal carbonization (HTC) for recovery of nutrients in the form of solid hydrochar (biochar) produced from DPS originating from four different dairy processing companies. The HTC tests were carried out at 160 °C, 180 °C, 200 °C and 220 °C, and a residence time of 1h. The elemental properties of hydrochars (biochars), the content of primary and secondary nutrients, as well as contaminants were examined. The transformation of phosphorus in DPS during HTC was investigated. The fraction of plant available phosphorus was determined. The properties of hydrochar (biochar) were compared against the European Union Fertilizing Products Regulation. The findings of this study demonstrate that the content of nutrient in hydrochars (biochars) meet the requirements for organo-mineral fertilizer with nitrogen and phosphorus as the declared nutrients (13.9-26.7%). Further research on plant growth and field tests are needed to fully assess the agronomic potential of HTC hydrochar (biochar).
Collapse
Affiliation(s)
- Marzena Kwapinska
- Dairy Processing Technology Centre, University of Limerick, Limerick, V94 T9PX, Ireland.
| | - Italo Pisano
- Department of Chemical Sciences, University of Limerick, Limerick, V94 T9PX, Ireland.
| | - James J Leahy
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland.
| |
Collapse
|
7
|
Kundu R, Kunnoth B, Pilli S, Polisetty VR, Tyagi RD. Biochar symbiosis in anaerobic digestion to enhance biogas production: A comprehensive review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 344:118743. [PMID: 37572403 DOI: 10.1016/j.jenvman.2023.118743] [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: 06/14/2023] [Revised: 07/24/2023] [Accepted: 08/05/2023] [Indexed: 08/14/2023]
Abstract
In recent years, anaerobic digestion (AD) has gained popularity as a practical method for generating clean energy and efficiently managing organic waste. However, the effectiveness of the reactor is compromised by the accumulation of ammonia, acids, and nutrients, leading to inhibition and instability. Because of its adaptability, biochar (BC) has sparked a substantial interest in biogas production and can be created by charring biomass and waste materials. Adding BC to the AD process could yield the following benefits: mitigating toxic inhibition, reducing the duration of the methanogenic lag phase, immobilising functional bacteria, and enhancing the rate of electron transfer between methanogenic and acetogenic microorganisms. Nonetheless, there remains to be more comprehensive knowledge regarding the multifaceted function of BC and its intricate mechanisms in the generation of biogas in AD. The research summarises scattered information from the literature on BC production from various feedstocks and factors affecting its characteristics. Additionally, a comprehensive analysis of the utilisation of BC as an additive within AD is presented here, emphasising how BC characteristics impact AD processes and how they effectively engage key challenges.
Collapse
Affiliation(s)
- Ranarup Kundu
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India
| | - Bella Kunnoth
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India
| | - Sridhar Pilli
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India.
| | - Venkateswara Rao Polisetty
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India.
| | - R D Tyagi
- BOSK Bioproducts, Quebec City, QC, Canada
| |
Collapse
|
8
|
Lu J, Li H, Wang G. The impact of green mergers and acquisitions on illegal pollution discharge of heavy polluting firms: Mechanism, heterogeneity and spillover effects. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 340:117973. [PMID: 37119626 DOI: 10.1016/j.jenvman.2023.117973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 05/12/2023]
Abstract
This paper is to discuss the impact of green mergers and acquisitions (GMA) on illegal pollution discharge (ILP). The diurnal difference pollution data of the nearest monitoring station around heavy polluting enterprises are used to measure ILP. Results show that: (1) Compared with polluting firms that have not conducted GMA, GMA can reduce ILP by 2.9%. (2) Large scale, strong industrial correlation and cash payment of GMA is more conducive to controlling ILP. GMA in the same city is easier to inhibit ILP. (3) Impact paths of GMA on ILP mainly include cost effect, technology effect and responsibility effect. GMA aggravates ILP by increasing management costs and risk control risks. GMA inhibits ILP by increasing green innovation, environmental protection investment, social responsibility performance and environmental information disclosure. (4) GMA has a greater inhibition effect on ILP in state-owned firms, technology-intensive firms and eastern firms. (5) The industrial spillover effect of GMA is more obvious than that of the same city. This paper provides implications for curbing ILP from the perspective of GMA.
Collapse
Affiliation(s)
- Juan Lu
- College of Economics and Management, Nanjing Agricultural University, Nanjing, China.
| | - He Li
- School of Management, Nanjing University of Posts and Telecommunications, China.
| | - Guanhua Wang
- General Department of the National Bureau of Statistics, China.
| |
Collapse
|
9
|
Mardonova M, Han YS. Environmental, hydrological, and social impacts of coal and nonmetal minerals mining operations. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117387. [PMID: 36736087 DOI: 10.1016/j.jenvman.2023.117387] [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: 12/10/2022] [Revised: 01/22/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Mining and mineral exploration has many effects on the surrounding environment. The present study reviews the hydrological and environmental impacts of coal and nonmetal mining operations by mine lifecycle stages and facility patterns. Further, a critical review of regulations and policies in South Korea focusing on the mining-water interaction, conservation, and management was performed to emphasize the current state of legislation in the country. The counties where mining was the primary employer in Gangwon-do province in South Korea were assessed for the mining impact on the community's social life and com-pared to the non-mining counties in the same province. The results of the comparative study showed the less education, healthcare and employment chances in mining counties than the adjacent counties with no mining activities.
Collapse
Affiliation(s)
- Mokhinabonu Mardonova
- Environment and I.T. Convergence Department, Chungnam National University, 34134, Daejeon, South Korea
| | - Young-Soo Han
- Environment and I.T. Convergence Department, Chungnam National University, 34134, Daejeon, South Korea.
| |
Collapse
|
10
|
Shen G, Li Z, Hong T, Ru X, Wang K, Gu Y, Han J, Guo Y. The status of the global food waste mitigation policies: experience and inspiration for China. ENVIRONMENT, DEVELOPMENT AND SUSTAINABILITY 2023:1-29. [PMID: 37362998 PMCID: PMC10073629 DOI: 10.1007/s10668-023-03132-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 03/08/2023] [Indexed: 06/28/2023]
Abstract
Food waste has become a significant challenge faced by the community with a shared future for mankind, and it has also caused a considerable impact on China's food security. Scholars across disciplines, international organizations, and especially policymakers are increasingly interested in food waste. Policies are seen as a powerful factor in reducing food waste, but current research on related policies is more scattered. This paper summarizes and analyzes the experiences of food waste policy development and implementation by systematically reviewing the studies on food waste reduction policies. The results of this paper's analysis show that current global food waste policies are focused at the national strategic level, with approaches such as legislation, food donation, waste recycling, awareness and education, and data collection. At the same time, we find that the current experience of developed countries in policy formulation and implementation is beneficial for policy formulation in developing countries. And taking China as an example, we believe that developing countries can improve food waste policies in the future by improving legislation, guiding the development of food banks, promoting social governance, and strengthening scientific research projects. These policies will all contribute strongly to global environmental friendliness. In addition, we discuss some of the factors that influence the development of food waste policies and argue that in the future, more consideration needs to be given to the effects of policy implementation and that case studies should focus more on developing countries. This will contribute to the global sustainable development process. Supplementary Information The online version contains supplementary material available at 10.1007/s10668-023-03132-0.
Collapse
Affiliation(s)
- Guohui Shen
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Ziqi Li
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Tiannuo Hong
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Xin Ru
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Kunzhen Wang
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Yanting Gu
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Juan Han
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
| | - Yanzhi Guo
- Institute of Food and Nutrition Development, Ministry of Agriculture and Rural Affairs, Beijing, 100081 China
- Chinese Academy of Agricultural Sciences, Beijing, 100081 China
| |
Collapse
|
11
|
Yao C, Liu G, Hao X, Liu Y. Symbiotic integration of waste disposal capability within a city cluster: The case of the Yangtze River Delta. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 330:117166. [PMID: 36603257 DOI: 10.1016/j.jenvman.2022.117166] [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: 10/17/2022] [Revised: 12/17/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
With the ongoing urbanization in developing regions, integrating regional waste disposal capability is challenging due to unbalanced economic development and rising environmental issues. This research proposed a multi-dimensional symbiotic integration of waste disposal capability. Applying data from the Yangtze River Delta (YRD) in China, we first explore the waste flows and interactions between cities to identify the possibility of inter-municipal collaboration based on the augmented gravity model. We then employ social network analysis to categorize the cities in the collaborative network of waste disposal into subgroups by functionalities. Finally, we proposed the top-down framework of symbiotic networks for waste disposal. Our findings indicate that YRD cities can be classified into four types according to their waste density and disposal efficiency: High-High, Low-High, Low-Low, and High-Low. We also identify three types of inter-municipal collaborative relationships: between high-density and high-efficiency cities, between high-density cities, and between high-efficiency cities. The city subgroups can be categorized into "high-efficiency clusters," "high-density clusters," and "hub clusters," which pave the way for a shared or complementary urban symbiosis in the waste recycling industry. The division of roles among subgroups enables symbiotic activities within the city cluster. This paper extends the spatial scope of industrial symbiosis literature and has practical implications for transitioning to a circular economy in waste management of developing countries.
Collapse
Affiliation(s)
- Chengyan Yao
- School of Economics and Management, Tongji University, Shanghai, 200092; China
| | - Guangfu Liu
- School of Economics and Management, Tongji University, Shanghai, 200092; China
| | - Xinyu Hao
- School of Economics and Management, Tongji University, Shanghai, 200092; China; Department of Public and International Affairs, City University of Hong Kong, Hong Kong, 999077; China
| | - Yanran Liu
- Shanghai International College of Intellectual Property, Tongji University, Shanghai, 200092; China.
| |
Collapse
|
12
|
Interactions between CTAB and montmorillonite by atomic force microscopy and molecular dynamics simulation. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
13
|
El-Hout SI, Attia SY, Mohamed SG, Abdelbasir SM. From waste to value-added products: Evaluation of activated carbon generated from leather waste for supercapacitor applications. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 304:114222. [PMID: 34871869 DOI: 10.1016/j.jenvman.2021.114222] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/12/2021] [Accepted: 11/30/2021] [Indexed: 06/13/2023]
Abstract
Leather tanning operations create a large amount of solid and liquid waste from tanning, wherein Cr(III) compounds are used to produce wet blue leather. In this study, activated carbon (AC) generated from leather waste (LW) was evaluated for supercapacitor (SC) applications. AC was produced through carbonization at a temperature range of 700°C-900 °C, followed by chemical activation. The morphological characteristics of the AC samples revealed a certain degree of porosity and a maximum surface area of 381 m2 g-1. X-ray diffraction and EDX examination showed the existence of graphitic planes in the LW-derived AC. Raman, FT-IR, and XPS confirmed the defect nature and surface functional groups of the AC samples. A three-electrode approach was employed to assess the electrochemical characteristics of the AC samples. The supreme capacitance of a sample (LW700) at 1 A/g was 550 F g-1 (237 C g-1) in a 6 M KOH electrolyte. All the electrochemical results (CV, GCD, and Nyquist curves) demonstrated that the LW carbon possessed a high specific capacitance and electrochemical cycle constancy, and hence is appropriate for SC fabrication. These desirable capacitive performances enable solid leather waste-derived carbons as a source of new materials for low-cost energy storage supercapacitors. This work put forwards a new concept of 'waste to value-added products' that can be a helping hand for leather industries and its solid waste management disposal problems.
Collapse
Affiliation(s)
- Soliman I El-Hout
- Central Metallurgical Research and Development Institute, P.O. Box: 87, Helwan, 11421, Cairo, Egypt
| | - Sayed Y Attia
- Mining and Metallurgy Engineering Department, Tabbin Institute for Metallurgical Studies (TIMS), Tabbin, 109, Helwan, Cairo, 11421, Egypt
| | - Saad G Mohamed
- Mining and Metallurgy Engineering Department, Tabbin Institute for Metallurgical Studies (TIMS), Tabbin, 109, Helwan, Cairo, 11421, Egypt.
| | - S M Abdelbasir
- Central Metallurgical Research and Development Institute, P.O. Box: 87, Helwan, 11421, Cairo, Egypt.
| |
Collapse
|
14
|
Li P, Niu H, Li S, King TL, Zou S, Chen X, Lu Z. DBWM: A diluted bitumen weathering model. MARINE POLLUTION BULLETIN 2022; 175:113372. [PMID: 35114546 DOI: 10.1016/j.marpolbul.2022.113372] [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: 09/10/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
To help better assist the management of Diluted bitumen (DilBit) spills in marine environment, a model named as DilBit Weathering Model (DBWM) was developed in this study to simulate DilBits weathering in marine environment. The DBWM was developed based on specific algorithms for evaporation, dispersion, biodegradation, as well as density and viscosity changes for DilBit weathering and other widely used algorithms for conventional oil weathering in marine environment. To validate the model, a series of DilBit weathering simulation were conducted and compared with the experimental data. Furthermore, the performance of DBWM was compared with a widely used oil weathering model (Automated Data Inquiry for Oil Spills, ADIOS2). The results demonstrated the feasibility and advantages of the developed DBWM in simulating the weathering of marine DilBit spills. Thus, the proposed DBWM can provide effective decision support to marine DilBit spill management.
Collapse
Affiliation(s)
- Pu Li
- School of Marine Science, Sun Yat-sen University, Zhuhai Campus, Zhuhai 519082, China; Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China
| | - Haibo Niu
- Department of Engineering, Dalhousie University, Truro Campus, Truro, NS B2N 5E3, Canada
| | - Shihan Li
- Department of Engineering, Dalhousie University, Truro Campus, Truro, NS B2N 5E3, Canada
| | - Thomas L King
- Centre for Offshore Oil, Gas and Energy Research, Bedford Institute of Oceanography, Fisheries and Ocean Canada, Dartmouth, Nova Scotia B2Y 4A2, Canada
| | - Shichun Zou
- School of Marine Science, Sun Yat-sen University, Zhuhai Campus, Zhuhai 519082, China; Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China.
| | - Xiayu Chen
- School of Marine Science, Sun Yat-sen University, Zhuhai Campus, Zhuhai 519082, China; Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China
| | - Zhenhua Lu
- School of Marine Science, Sun Yat-sen University, Zhuhai Campus, Zhuhai 519082, China; Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China
| |
Collapse
|
15
|
Sewak A, Deshpande S, Rundle-Thiele S, Zhao F, Anibaldi R. Community perspectives and engagement in sustainable solid waste management (SWM) in Fiji: A socioecological thematic analysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113455. [PMID: 34365185 DOI: 10.1016/j.jenvman.2021.113455] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 07/21/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Improper waste disposal and low rates of household waste diversion through material and organic waste recycling are a global concern. Understanding community perspectives on solid waste management services, outreach activities, and regulatory measures, and the barriers to sustainable practices, is crucial for designing effective waste management programmes. Longitudinal content analysis of archival data, such as newspapers, is a cost-effective, yet underutilised, research method to identify the viewpoints of diverse civic groups and examine the developments and challenges associated with the waste management sector. This paper investigates divergent stakeholders' perspectives and priorities using the Socio-Ecological Model (SEM) to examine the micro-system (intrapersonal and interpersonal), meso- and exo-system (community and institutional), and macro-system (policy level) factors that influence sustainable SWM practices. Using specific keywords, the authors searched online archives of a national newspaper in Fiji with a weekday circulation of over 20,000. Data from 482 newspaper articles, dated 2009-2020, were reviewed and dual-coded by two researchers using QDA Miner Lite. Findings indicate that poor waste management behaviour is linked to all factors within the Socio-Ecological system. While micro-level factors such as negligence, personal responsibility, lack of civic pride, and lack of awareness are causes of anti-environmental behaviour, structural factors such as inadequate waste collection services and recycling infrastructure contribute to low recycling rates. Civic education has been highlighted as a solution to encouraging pro-environmental behaviour (PEB), but there is a need to identify the type of educational tools and the frequency and impact of education workshops. This paper further discusses about the implications of community-based strategies and regulatory measures.
Collapse
Affiliation(s)
- Aarti Sewak
- Department of Marketing, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia.
| | - Sameer Deshpande
- Department of Marketing, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia.
| | - Sharyn Rundle-Thiele
- Department of Marketing, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia.
| | - Fang Zhao
- Research and Enterprise, Staffordshire Business School, Staffordshire University, Leek Road, Stoke-on-Trent, United Kingdom.
| | - Renata Anibaldi
- Department of Marketing, Griffith University, 170 Kessels Road, Nathan, QLD, 4111, Australia.
| |
Collapse
|
16
|
Chong JWR, Yew GY, Khoo KS, Ho SH, Show PL. Recent advances on food waste pretreatment technology via microalgae for source of polyhydroxyalkanoates. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 293:112782. [PMID: 34052610 DOI: 10.1016/j.jenvman.2021.112782] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 05/07/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible polyester which are biosynthesized from the intracellular cells of microalgae through the cultivation of organic food waste medium. Before cultivation process, food waste must undergo several pre-treatment techniques such as chemical, biological, physical or mechanical in order to solubilize complex food waste matter into simpler micro- and macronutrients in which allow bio-valorisation of microalgae and food waste compound during the cultivation process. This work reviews four microalgae genera namely Chlamydomonas, Chlorella, Spirulina, and Botryococcus, are selected as suitable species due to rapid growth rate, minimal nutrient requirement, greater adaptability and flexibility prior to lower the overall production cost and maximized the production of PHAs. This study also focuses on the different mode of cultivation for the accumulation of PHAs followed by cell wall destabilization, extraction, and purification. Nonetheless, this review provides future insights into enhancing the productivity of bioplastic derived from microalgae towards low-cost, large-scale, and higher productivity of PHAs.
Collapse
Affiliation(s)
- Jun Wei Roy Chong
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, P.R. China; Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
| | - Guo Yong Yew
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
| | - Kuan Shiong Khoo
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia
| | - Shih-Hsin Ho
- State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, P.R. China
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Jalan Broga, 43500, Semenyih, Selangor Darul Ehsan, Malaysia.
| |
Collapse
|
17
|
Kong J, Escobedo S, Lopez-Zamora S, de Lasa H. Phase equilibrium in n-octane/water separation units: vapor pressures, vapor and liquid molar fractions. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The present study reports result from research into vapor–liquid–liquid phase equilibrium for n-octane highly diluted in water and water highly diluted in n-octane blends, using a dynamic method implemented in a constant volume CREC-VL-Cell. In the CREC-VL-Cell, a very high level of mixing is achieved, allowing for dispersions to be formed in the liquid phase and good mixing in the gas phase. This VL-Cell and its auxiliary equipment provide an increasing temperature ramp in the 30–110 °C range. It is found that the CREC-VL-Cell is of special value, for studying immiscible or partially miscible blends, such as is the case of n-octane in water. With the data obtained, which includes vapor pressures and temperatures, data analyses involving mass and molar balances, allow establishing overall liquid and vapor molar fractions. The recorded vapor pressures together with the calculated liquid and vapor molar fractions offer valuable data for VL thermodynamic model discrimination. For instance, it can be shown that vapor pressures, vapor and liquid molar fractions, as calculated with the Aspen-Hysys Peng Robinson Equation of State (Hysys-Aspen PR-EoS) provide only a first approximation of the experimental data, with significant discrepancies in the prediction of an n-octane disengagement temperatures. Thus, the determination of combined measured vapor pressures and calculated overall liquid molar fractions in the CREC-VL-Cell, offers a valuable and accurate procedure for thermodynamic model validation and discrimination.
Collapse
Affiliation(s)
- Jeonghoon Kong
- Faculty of Engineering, Chemical Reactor Engineering Centre (CREC), Western University , London , ON , N6A 5B9 , Canada
| | - Salvador Escobedo
- Faculty of Engineering, Chemical Reactor Engineering Centre (CREC), Western University , London , ON , N6A 5B9 , Canada
| | - Sandra Lopez-Zamora
- Faculty of Engineering, Chemical Reactor Engineering Centre (CREC), Western University , London , ON , N6A 5B9 , Canada
| | - Hugo de Lasa
- Faculty of Engineering, Chemical Reactor Engineering Centre (CREC), Western University , London , ON , N6A 5B9 , Canada
| |
Collapse
|
18
|
Azam A, Rafiq M, Shafique M, Yuan J. An empirical analysis of the non-linear effects of natural gas, nuclear energy, renewable energy and ICT-Trade in leading CO 2 emitter countries: Policy towards CO 2 mitigation and economic sustainability. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 286:112232. [PMID: 33676132 DOI: 10.1016/j.jenvman.2021.112232] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 02/11/2021] [Accepted: 02/18/2021] [Indexed: 06/12/2023]
Abstract
Achieving reliable energy supply and environment sustainability whereby mitigating CO2 emissions and promoting sustainable development has become a global effort. Thus, the current study intends to verify the non-linear influence effects of natural gas, nuclear energy, renewable energy and information and communication technology trade on economic growth and carbon dioxide emission in ten leading CO2 emitter countries from 20002016. The panel regression, such as pooled regression, model fixed effect, random effects, robust least squares and panel causation procedures are applied for panel data appraisal. The regression analysis results mention that nuclear energy, renewable energy, and Information and communication technology (ICT-trade) stimulate economic growth, whereas environmental results illustrate that renewable energy and ICT-trade contribute to eliminating CO2 emissions. The causality findings indicate that renewable energy consumption and ICT trade cause economic growth as well as CO2 emissions. Therefore, policymakers should invigorate to exploit renewable energy and achieve the benefits from the significant influence of economic growth and a clean environment through the potential of green ICT-trade.
Collapse
Affiliation(s)
- Anam Azam
- School of Economics and Management, North China Electric Power University, Beijing 102206, China
| | - Muhammad Rafiq
- Department of Electrical Engineering, University of Engineering and Technology, Taxila 47050, Pakistan
| | - Muhammad Shafique
- Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong
| | - Jiahai Yuan
- 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.
| |
Collapse
|
19
|
Baldisserotto C, Demaria S, Accoto O, Marchesini R, Zanella M, Benetti L, Avolio F, Maglie M, Ferroni L, Pancaldi S. Removal of Nitrogen and Phosphorus from Thickening Effluent of an Urban Wastewater Treatment Plant by an Isolated Green Microalga. PLANTS (BASEL, SWITZERLAND) 2020; 9:plants9121802. [PMID: 33353199 PMCID: PMC7766996 DOI: 10.3390/plants9121802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/05/2020] [Accepted: 12/16/2020] [Indexed: 06/12/2023]
Abstract
Microalgae are photosynthetic microorganisms and are considered excellent candidates for a wide range of biotechnological applications, including the removal of nutrients from urban wastewaters, which they can recover and convert into biomass. Microalgae-based systems can be integrated into conventional urban wastewater treatment plants (WW-TP) to improve the water depuration process. However, microalgal strain selection represents a crucial step for effective phytoremediation. In this work, a microalga isolated from the effluent derived from the thickening stage of waste sludge of an urban WW-TP was selected and tested to highlight its potential for nutrient removal. Ammonium and phosphate abatements by microalgae were evaluated using both the effluent and a synthetic medium in a comparative approach. Parallelly, the isolate was characterized in terms of growth capability, morphology, photosynthetic pigment content and photosystem II maximum quantum yield. The isolated microalga showed surprisingly high biomass yield and removal efficiency of both ammonium and phosphate ions from the effluent but not from the synthetic medium. This suggests its clear preference to grow in the effluent, linked to the overall characteristics of this matrix. Moreover, biomass from microalgae cultivated in wastewater was enriched in photosynthetic pigments, polyphosphates, proteins and starch, but not lipids, suggesting its possible use as a biofertilizer.
Collapse
Affiliation(s)
- Costanza Baldisserotto
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| | - Sara Demaria
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| | - Ornella Accoto
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| | - Roberta Marchesini
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| | - Marcello Zanella
- HERA SpA—Direzione Acqua, Via C. Diana, 40, Cassana, 44044 Ferrara, Italy; (M.Z.); (L.B.); (F.A.)
| | - Linda Benetti
- HERA SpA—Direzione Acqua, Via C. Diana, 40, Cassana, 44044 Ferrara, Italy; (M.Z.); (L.B.); (F.A.)
| | - Francesco Avolio
- HERA SpA—Direzione Acqua, Via C. Diana, 40, Cassana, 44044 Ferrara, Italy; (M.Z.); (L.B.); (F.A.)
| | - Michele Maglie
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| | - Lorenzo Ferroni
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| | - Simonetta Pancaldi
- Department of Life Sciences and Biotechnology, University of Ferrara, C.so Ercole I d’Este, 32, 44121 Ferrara, Italy; (C.B.); (S.D.); (O.A.); (R.M.); (M.M.); (L.F.)
| |
Collapse
|
20
|
Lv J, Liu G, Feng J, Liu Q, Nan F, Liu X, Xie S. Harvesting biomass of an oil-rich microalga Parachlorella kessleri TY02 by ferric chloride: Effects on harvesting efficiency, lipid production and municipal wastewater treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 273:111128. [PMID: 32736121 DOI: 10.1016/j.jenvman.2020.111128] [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: 02/16/2020] [Revised: 06/16/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Inorganic coagulants have been widely used to harvest microalgal biomass. A great deal of attention has been mainly focused on the response of harvesting efficiency, lipid production and feasibility of the reuse of medium to inorganic coagulants. The physiological state of harvested cells and feasibility of wastewater treatment remain unclear. In this context, the effect of ferric chloride as a conventional inorganic coagulant on the harvesting efficiency, physiological state and lipid content of an oil-rich microalga Parachlorella kessleri TY02 was evaluated. Moreover, the performance of harvested cells for municipal wastewater treatment was also evaluated. When the dosage of iron ions was 0.077 mg/mg dry biomass and the sedimentation time was 5 min, the microalga had good harvesting efficiency and cell viability. As the dosage of iron ions was up to 0.15 mg/mg dry biomass, cell viability notably decreased. Cells harvested by 0.077 and 0.15 mg/mg dry biomass of iron ions showed good wastewater treatment efficiency. It was also found that long sedimentation time (40 min) not only did not promote harvesting efficiency, but also reduced cell viability. Iron ions had no notable effect on lipid content of the microalga. Through comprehensive evaluation of harvesting efficiency, lipid production, physiological state and wastewater treatment efficiency, it indicated that 0.077 mg/mg dry biomass of iron ions could be used to harvest biomass of the microalga.
Collapse
Affiliation(s)
- Junping Lv
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Guoji Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Jia Feng
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Qi Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Fangru Nan
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Xudong Liu
- School of Life Science, Shanxi University, Taiyuan, 030006, China
| | - Shulian Xie
- School of Life Science, Shanxi University, Taiyuan, 030006, China.
| |
Collapse
|
21
|
Pang W, Hou D, Chen J, Nowar EE, Li Z, Hu R, Tomberlin JK, Yu Z, Li Q, Wang S. Reducing greenhouse gas emissions and enhancing carbon and nitrogen conversion in food wastes by the black soldier fly. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 260:110066. [PMID: 31941627 DOI: 10.1016/j.jenvman.2020.110066] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 12/11/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
Currently, sustainable utilisation, including recycling and valorisation, is becoming increasingly relevant in environmental management. The wastes bioconversion by the black soldier fly larva (BSFL) has two potential advantages: the larvae can convert the carbon and nitrogen in the biomass waste, and improve the properties of the substrate to reduce the loss of gaseous carbon and nitrogen. In the present study, the conversion rate of carbon, nitrogen and the emissions of greenhouse gases and NH3 during BSFL bio-treatment of food waste were investigated under different pH conditions. The results showed that the pH of the raw materials is a pivotal parameter affecting the process. The average wet weight of harvested BSFL was 13.26-95.28 mg/larva, with about 1.95-13.41% and 5.40-18.93% of recycled carbon and nitrogen from substrate at a pH from 3.0 to 11.0, respectively. Furthermore, pH is adversely correlated with CO2 emissions, but positively with NH3 emissions. Cumulative CO2, NH3, CH4 and N2O emissions at pH ranging from 3.0 to 11.0 were 88.15-161.11 g kg-1, 0.15-1.68 g kg-1, 0.19-2.62 mg kg-1 and 0.02-1.65 mg kg-1, respectively. Compared with the values in open composting, BSFL bio-treatment of food waste could lead greenhouse gas (especially CH4 and N2O) and NH3 emissions to decrease. Therefore, a higher pH value of the substrate can increase the larval output and help the mitigation of greenhouse gas emissions.
Collapse
Affiliation(s)
- Wancheng Pang
- State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Dejia Hou
- State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan, 430070, PR China; College of Engineering, Huazhong Agricultural University, Wuhan, PR China
| | - Jiangshan Chen
- State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Elhosseny E Nowar
- Plant Protection Department, Faculty of Agriculture, Benha University, Moshtohor, Kaluybia, 13736, Egypt
| | - Zongtian Li
- State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Ronggui Hu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, PR China
| | | | - Ziniu Yu
- State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Qing Li
- State Key Laboratory of Agricultural Microbiology, College of Science, Huazhong Agricultural University, Wuhan, 430070, PR China.
| | - Shucai Wang
- College of Engineering, Huazhong Agricultural University, Wuhan, PR China.
| |
Collapse
|
22
|
Wang H, Chao L, Wei X, Qi X, Li J, Jiang L, Li W, Jia P. Design and preparation of flocculant with self-degrading characteristics for dewatering of oil sand tailings. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1634586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Haiwang Wang
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
- Academy of Materials Science and Engineering, Northeastern University , Shenyang , P. R. China
| | - Li Chao
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
- Academy of Materials Science and Engineering, Northeastern University , Shenyang , P. R. China
| | - Xinfang Wei
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
- Academy of Materials Science and Engineering, Northeastern University , Shenyang , P. R. China
| | - Xiwei Qi
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
- Academy of Materials Science and Engineering, Northeastern University , Shenyang , P. R. China
| | - Jinlong Li
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
- Academy of Materials Science and Engineering, Northeastern University , Shenyang , P. R. China
| | - Luhong Jiang
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
- Academy of Materials Science and Engineering, Northeastern University , Shenyang , P. R. China
| | - Wenzhe Li
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
| | - Penghui Jia
- Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao , Qinhuangdao , P. R. China
| |
Collapse
|
23
|
Jebali A, Acién FG, Sayadi S, Molina-Grima E. Utilization of centrate from urban wastewater plants for the production of Scenedesmus sp. in a raceway-simulating reactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 211:112-124. [PMID: 29408060 DOI: 10.1016/j.jenvman.2018.01.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 11/12/2017] [Accepted: 01/15/2018] [Indexed: 06/07/2023]
Abstract
This work investigates the production of the native microalgae strain Scenedesmus sp. in semi-continuous mode at lab scale in open raceway-simulating reactors and using centrate as the culture medium. The biomass productivity and nutrient removal capacity of Scenedesmus sp. at different dilution rates were investigated indoors as well as its tolerance to centrate as the culture medium at different concentrations. A biomass productivity of 7.80 g/m2 day was obtained at 200 μE/m2 s, 5 cm culture depth, 0.30 1/day of dilution rate and 60% centrate while nitrogen and phosphorus removal rates were 1.50 g/m2 day and 0.15 g/m2 day, respectively. The produced biomass characterization under these conditions showed a lipid content of 12.60% d wt. along with a favorable fatty acids profile with 57.70% of total fatty acids composed of saturated and monounsaturated fatty acids. Subsequently, the effect of light intensity and culture depth on biomass productivity and nutrient uptake as well as the biochemical composition and fatty acids profile was studied using two irradiance levels (200 and 1000 μE/m2 s) and four culture depths (5 cm, 10 cm, 15 cm and 20 cm). Under optimal conditions of 1000 μE/m2 s, 60% centrate, 0.30 1/day dilution rate and 15 cm culture depth, a maximum biomass productivity of 22.20 g/m2 day was obtained. Nitrogen and phosphorus removal rates of 2.00 gN/m2 day and 0.40 gP/m2 day, respectively, were recorded. An amount of 11.70% d wt. of lipids was determined along with a suitable fatty acids profile for biofuel production.
Collapse
Affiliation(s)
- Ahlem Jebali
- Laboratory of Environmental Bioprocesses, Sfax Centre of Biotechnology, University of Sfax, P.O. Box 1177, 3018 Sfax, Tunisia; Chemical Engineering Department, University of Almería, 04120 Almería, Spain
| | - F Gabriel Acién
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain
| | - Sami Sayadi
- Laboratory of Environmental Bioprocesses, Sfax Centre of Biotechnology, University of Sfax, P.O. Box 1177, 3018 Sfax, Tunisia
| | - Emilio Molina-Grima
- Chemical Engineering Department, University of Almería, 04120 Almería, Spain.
| |
Collapse
|