1
|
Xiong H, Liu L, Song B, Liu H, Shi H, Zhu Y. Mesophilic and thermophilic fermentation of activated sludge for volatile fatty acids production: focusing on anaerobic degradation of carbohydrate and protein. ENVIRONMENTAL TECHNOLOGY 2024:1-13. [PMID: 38286139 DOI: 10.1080/09593330.2024.2306152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 12/31/2023] [Indexed: 01/31/2024]
Abstract
The volatile fatty acids (VFAs) productions, as well as particulate organics decomposition, soluble chemical oxygen demand (SCOD) yield, and the VFAs production pathways from mesophilic and thermophilic anaerobic fermentation in waste activated sludge were investigated. Batch experiments showed that the decomposition rate of volatile suspended solids (VSS), particulate carbohydrate (P-C) and particulate protein (P-P) followed the first-order kinetic model at different temperatures. However, the intermediates, accumulated in the process of protein or carbohydrate digestion had a more significant inhibitory effect on the production of VFAs during the mesophilic anaerobic acidification process. The production of VFAs by thermophilic anaerobic fermentation is 2086.05 mg COD/L, which is about twice the production under mesophilic conditions. Among them, the concentration and proportion of high molecular weight organic acids such as isobutyric acid (320.29 mgCOD/L) and isovaleric acid (745.75 mgCOD/L) are relatively high. Then 13C stable isotope labelling experiment demonstrated that, the decomposition of carbohydrates yields 77% acetic acid and 86% butyric acid, while protein breakdown produces 85% propionic acid and 99% valeric acid. This confirms that carbohydrates are more favourable for the formation of even-carbon organic acids, while proteins tend to yield odd-carbon organic acids. Additionally, this helps refine the pathway for valeric acid formation during anaerobic acidogenesis.
Collapse
Affiliation(s)
- Huilei Xiong
- Beijing Institute of Collaborative Innovation, Beijing, People's Republic of China
- School of Public Health, Xiangnan University, Chenzhou, People's Republic of China
| | - Lanhua Liu
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, People's Republic of China
| | - Baodong Song
- Beijing Institute of Collaborative Innovation, Beijing, People's Republic of China
| | - Haitao Liu
- School of Public Health, Xiangnan University, Chenzhou, People's Republic of China
| | - Hanchang Shi
- Beijing Institute of Collaborative Innovation, Beijing, People's Republic of China
- School of Environment, Tsinghua University, Beijing, People's Republic of China
| | - Yinhe Zhu
- Hunnan Chendian International Development Share-Holding Co. Ltd., Chenzhou, People's Republic of China
| |
Collapse
|
2
|
Lin M, Qiao W, Ren L, Sun Y, Zhang J, Dong R. Determination of effects of thermophilic and hyperthermophilic temperatures on anaerobic hydrolysis and acidogenesis of pig manure through a one-year study. BIORESOURCE TECHNOLOGY 2024; 391:129890. [PMID: 37858802 DOI: 10.1016/j.biortech.2023.129890] [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: 08/06/2023] [Revised: 10/01/2023] [Accepted: 10/16/2023] [Indexed: 10/21/2023]
Abstract
Improving hydrolysis and acidogenesis through thermophilic and hyperthermophilic temperatures is critical for enhancing the anaerobic decomposition of organic waste like pig manure. However, whether higher temperatures can provide more enhanced performance has not been elucidated experimentally. This study, therefore, conducted a 375-day continuous operation experiment at 55 and 70 °C with a 5-day hydraulic retention time. The two temperature reactors entered a stable state after about 200 days and long-term microbial acclimation markedly changed their performances. In the thermophilic and hyperthermophilic reactor, the hydrolysis efficiencies were obtained at 29.7 % and 27.3 % respectively, whereas the acidogenesis efficiency was relatively low at 1.0 % and 3.1 %. Due to the occurrence of methanogenesis, the volatile fatty acid concentration in the thermophilic reactor was only 45 % of that in the hyperthermophilic reactor. The thermophilic reactor exhibited higher bacterial diversity; however, this difference between the two reactors apparently did not correlate with hydrolysis and acidogenesis performance.
Collapse
Affiliation(s)
- Min Lin
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Wei Qiao
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China.
| | - Lijuan Ren
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Yibo Sun
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Jiahao Zhang
- College of Engineering, China Agricultural University, Beijing 100083, China; Sanya Institute of China Agricultural University, Sanya, Hainan Province 572025, China
| | - Renjie Dong
- College of Engineering, China Agricultural University, Beijing 100083, China
| |
Collapse
|
3
|
Zhao B, van Bodegom PM, Trimbos KB. Antibiotic Resistance Genes in Interconnected Surface Waters as Affected by Agricultural Activities. Biomolecules 2023; 13:biom13020231. [PMID: 36830600 PMCID: PMC9953135 DOI: 10.3390/biom13020231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/19/2023] [Accepted: 01/22/2023] [Indexed: 01/27/2023] Open
Abstract
Pastures have become one of the most important sources of antibiotic resistance genes (ARGs) pollution, bringing risks to human health through the environment and the food that is grown there. Another significant source of food production is greenhouse horticulture, which is typically located near pastures. Through waterways, pasture-originated ARGs may transfer to the food in greenhouses. However, how these pasture-originated ARGs spread to nearby waterways and greenhouses has been much less investigated, while this may pose risks to humans through agricultural products. We analyzed 29 ARGs related to the most used antibiotics in livestock in the Netherlands at 16 locations in an agricultural area, representing pastures, greenhouses and lakes. We found that ARGs were prevalent in all surface waters surrounding pastures and greenhouses and showed a similar composition, with sulfonamide ARGs being dominant. This indicates that both pastures and greenhouses cause antibiotic resistance pressures on neighboring waters. However, lower pressures were found in relatively larger and isolated lakes, suggesting that a larger water body or a non-agricultural green buffer zone could help reducing ARG impacts from agricultural areas. We also observed a positive relationship between the concentrations of the class 1 integron (intl1 gene)-used as a proxy for horizontal gene transfer-and ARG concentration and composition. This supports that horizontal gene transfer might play a role in dispersing ARGs through landscapes. In contrast, none of the measured four abiotic factors (phosphate, nitrate, pH and dissolved oxygen) showed any impact on ARG concentrations. ARGs from different classes co-occurred, suggesting simultaneous use of different antibiotics. Our findings help to understand the spatial patterns of ARGs, specifically the impacts of ARGs from pastures and greenhouses on each other and on nearby waterways. In this way, this study guides management aiming at reducing ARGs' risk to human health from agricultural products.
Collapse
|
4
|
Cai Y, Gallegos D, Zheng Z, Stinner W, Wang X, Pröter J, Schäfer F. Exploring the combined effect of total ammonia nitrogen, pH and temperature on anaerobic digestion of chicken manure using response surface methodology and two kinetic models. BIORESOURCE TECHNOLOGY 2021; 337:125328. [PMID: 34120063 DOI: 10.1016/j.biortech.2021.125328] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Ammonia inhibition is the most challenging issue in the anaerobic digestion (AD) of nitrogen-rich substrates. Total ammonia nitrogen (TAN) concentration, temperature and pH are the main operational parameters affecting the chemical equilibrium between free ammonium nitrogen (NH3; FAN) and ammonium ions (NH4+). However, it is still unclear how these parameters together affect digestion performance by influencing this equilibrium. To determine the effect and linkages of these parameters, a Box-Behnken design-response surface methodology (RSM), correlation analysis and two kinetic models were carried out. The results revealed that the linear effect of TAN, the interaction effect between TAN and temperature, and temperature and pH were significant, however, the quadratic effect of TAN, temperature and pH were also significant. Furthermore, TAN and temperature were positively correlated with Mmax, k and Rmax. Findings from this study could provide a theoretical basis to develop the way of relieving ammonia inhibition.
Collapse
Affiliation(s)
- Yafan Cai
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany; School of Chemical Engineering, Zhengzhou University, Kexue Dadao 100, 450001 Zhengzhou, China; College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Daniela Gallegos
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany
| | - Zehui Zheng
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Walter Stinner
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany; Sino-German Biomass Research Center Anhui (C-DBFZ Anhui), Hefei University, Jinxiu Dadao 99, 230601 Hefei, PR China
| | - Xiaofen Wang
- College of Agronomy and Biotechnology/Biomass Engineering Center, China Agricultural University, Beijing 100193, China
| | - Jürgen Pröter
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany
| | - Franziska Schäfer
- Department of Biochemical Conversion, Deutsches Biomassforschungszentrum Gemeinnützige GmbH, Torgauer Straße116, 04347 Leipzig, Germany.
| |
Collapse
|
5
|
Fan Y, Yang X, Lei Z, Adachi Y, Kobayashi M, Zhang Z, Shimizu K. Novel insight into enhanced recoverability of acidic inhibition to anaerobic digestion with nano-bubble water supplementation. BIORESOURCE TECHNOLOGY 2021; 326:124782. [PMID: 33535153 DOI: 10.1016/j.biortech.2021.124782] [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: 12/10/2020] [Revised: 01/20/2021] [Accepted: 01/23/2021] [Indexed: 06/12/2023]
Abstract
Nano-bubble water (NBW) has been proven to be effective in promoting organics utilization and CH4 production during anaerobic digestion (AD) process, suggesting its potential in improving the stability of the AD process and thereby alleviating acidic inhibition. In this work, the effect of NBW on digestion stability and CH4 production was investigated to evaluate the ability of NBW on AD recovery from acidic inhibition. Results showed that NBW supplementation increased the total alkalinity (TA) and partial alkalinity (PA), and reduced the ratio of VFA/TA, thus maintained the stability of the AD process. Generation/consumption of VFAs was also enhanced with NBW supplementation under acidic inhibition with pH values of 5.5, 6.0 and 6.5. The cumulative CH4 production was 246-257 mL/g-VS in NBW groups, which was 12.1-17.2% higher than the control. Moreover, with NBW supplementation, the maximum CH4 production rate was raised according to the modeling results.
Collapse
Affiliation(s)
- Yujie Fan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xiaojing Yang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Yasuhisa Adachi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Motoyoshi Kobayashi
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| |
Collapse
|
6
|
Tiwari SB, Dubey M, Ahmed B, Gahlot P, Khan AA, Rajpal A, Kazmi AA, Tyagi VK. Carbon-based conductive materials facilitated anaerobic co-digestion of agro waste under thermophilic conditions. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 124:17-25. [PMID: 33596535 DOI: 10.1016/j.wasman.2021.01.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/26/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Management of agro-waste is a major challenge globally due to inefficient disposal techniques, which concominantly leads pollution and loss of renewable bioenergy. Anaerobic digestion of agro-waste is one of the ways to tackle this problem but hindered by the recalcitrant nature of agro-waste. This study investigated the effect of granular activated carbon (GAC) and granular biochar (GBC) addition to enhance the thermophilic anaerobic co-digestion of wheat husk and sewage sludge. The conductive materials (particle size: 2-5 mm) were added separately at five different concentrations: 10, 20, 30, 40, 50 g/Linoculum. The findings revealed that samples amended with GAC and GBC at 20 g/L dosage had the highest biogas yield of 263 and 273 mL/gVSadded, respectively, corresponding to 22 and 27% higher yield than the control. Additionally, a shorter lag phase was observed in both cases compared to the Control. However, the GBC amended samples showed relatively stable biogas production compared to GAC and consistent results regarding pH, alkalinity, total volatile fatty acids, and soluble chemical oxygen demand. The preliminary techno-economic analysis indicates that addition of GAC or GBC may not be feasible and require other innovative engineered solutions for the addition of conductive materials. This study confirms that GAC and GBC amendments enhance the biogas productivity and process stability in anaerobic digestion of recalcitrant agro-waste under the high-temperature regime and calls for further research in this direction.
Collapse
Affiliation(s)
- Satya Brat Tiwari
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Monika Dubey
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Banafsha Ahmed
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Pallavi Gahlot
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Abid Ali Khan
- Department of Civil Engineering, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Ankur Rajpal
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - A A Kazmi
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Vinay Kumar Tyagi
- Environmental Biotechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| |
Collapse
|
7
|
Lian T, Zhang W, Cao Q, Wang S, Dong H. Enhanced lactic acid production from the anaerobic co-digestion of swine manure with apple or potato waste via ratio adjustment. BIORESOURCE TECHNOLOGY 2020; 318:124237. [PMID: 33091690 DOI: 10.1016/j.biortech.2020.124237] [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: 08/14/2020] [Revised: 10/02/2020] [Accepted: 10/03/2020] [Indexed: 06/11/2023]
Abstract
The valorization of organic waste into lactic acid (LA) via co-digestion has attracted tremendous research interests in recent years. This study investigated the feasibility of intensifying the LA accumulation from anaerobic digestion (AD) of swine manure (SM) by adding apple waste (AW) or potato waste (PW). Results indicated that AW or PW obviously enhanced the accumulation of LA, and when the optimal mixing ratio of AW or PW to SM of 75:25, the maximum concentrations of LA were 27.61 and 8.91 g COD/L, which were around 3.53- and 1.14-folds of that of the mono-digestion of SM, respectively. Meanwhile, the co-digestion of SM and AW showed significantly higher LA production than that of SM and PW (p < 0.05). High reducing sugar content of AW contributed to LA accumulation in AD process. In addition, AW increased the relative abundance of Lactobacillus and Clostridium, thus benefited the production of LA.
Collapse
Affiliation(s)
- Tianjing Lian
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wanqin Zhang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Qitao Cao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Shunli Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Hongmin Dong
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| |
Collapse
|
8
|
Zhou Q, Li X, Wu S, Zhong Y, Yang C. Enhanced Strategies for Antibiotic Removal from Swine Wastewater in Anaerobic Digestion. Trends Biotechnol 2020; 39:8-11. [PMID: 32718780 DOI: 10.1016/j.tibtech.2020.07.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 12/12/2022]
Abstract
There is a need for techniques that ensure antibiotic removal in anaerobic digesters for robust methane production. In this article, we discuss recent strategies for enhanced antibiotic removal from swine wastewater and offer insights on anaerobic digestion (AD) process design for improved antibiotic removal.
Collapse
Affiliation(s)
- Qi Zhou
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China
| | - Xiang Li
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China
| | - Shaohua Wu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China
| | - Yuanyuan Zhong
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Chunping Yang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, China; Hunan Provincial Environmental Protection Engineering Center for Organic Pollution Control of Urban Water and Wastewater, Changsha, Hunan 410001, China.
| |
Collapse
|
9
|
Sekoai PT, Engelbrecht N, du Preez SP, Bessarabov D. Thermophilic Biogas Upgrading via ex Situ Addition of H 2 and CO 2 Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste. ACS OMEGA 2020; 5:17367-17376. [PMID: 32715221 PMCID: PMC7377068 DOI: 10.1021/acsomega.0c01725] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
Bioconversion of renewable H2 and waste CO2 using methanogenic archaea is a promising technology for obtaining high-purity CH4, which can serve as an alternative for natural gas. This process is known as ex situ biogas upgrading. This work highlights the pathway toward the bioconversion of renewable H2 and CO2 into high-purity biomethane by exploiting highly accessible agro-municipal residues: cow manure (CM) and the organic fraction of solid municipal waste (OFSMW), which used to be called "waste materials". More specifically, an ex situ thermophilic (55 °C) biogas upgrading process was conducted by CM and OFSMW codigestion at different mass proportions: 100:0, 80:20, 70:30, 60:40, and 50:50. Maximum CH4 concentrations of 92-97 vol % and biogas volumetric production rates of 4954-6605 NmL/L.d were obtained from a batch reactor of 3 L working volume. Feedstock characterization, pH monitoring, and the carbon-to-nitrogen ratio were critical parameters to evaluate during biogas upgrading experiments. In this work, the usefulness of agro-municipal substrates is highlighted by producing high-purity biomethane-an energetic chemical to facilitate renewable energy conversion, which supports various end-use applications. This process therefore provides a solution to renewable energy storage challenges and future sustainable and green energy supply.
Collapse
|
10
|
Fan Y, Lei Z, Guo Z, Huang W, Wang D, Wang X, Zhang Z, Shimizu K. Enhanced solubilization of solid organics and methane production by anaerobic digestion of swine manure under nano-bubble water addition. BIORESOURCE TECHNOLOGY 2020; 299:122512. [PMID: 31855661 DOI: 10.1016/j.biortech.2019.122512] [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: 09/25/2019] [Revised: 11/25/2019] [Accepted: 11/27/2019] [Indexed: 06/10/2023]
Abstract
Nano-bubble water (NBW) refers to water with a large number of nanoscale particle bubbles. The aim of this work was to study the mechanism of NBW addition into the anaerobic digestion (AD) of swine manure (SM). The results showed that the cumulative methane production from the NBW added reactor was 192-225 mL/g-VS and 19-39% higher than the control group (without NBW addition). Based on the analysis of soluble organics, NBW addition not only accelerated hydrolysis rates of proteins and carbohydrates, but also enhanced the production of VFAs. Moreover, mechanism analysis reveals that NBW with higher spin-spin relaxation time and absolute value of zeta potential might promote enzyme activity and the hydrolysis of organic solids. Simultaneously, the electron transport system activity of the methanogenic communities and electric conductivity were enhanced by NBW addition. This work implies that NBW addition is promising for enhancing AD for enhancement of methane production.
Collapse
Affiliation(s)
- Yujie Fan
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhongfang Lei
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zitao Guo
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Weiwei Huang
- College of Environmental Science and Engineering, Institute of Tropical Agriculture and Forestry, Hainan University, Renmin Road, Haikou 570228, China
| | - Di Wang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Xuezhi Wang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Zhenya Zhang
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan
| | - Kazuya Shimizu
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8572, Japan.
| |
Collapse
|
11
|
Wang H, Lim TT, Duong C, Zhang W, Xu C, Yan L, Mei Z, Wang W. Long-Term Mesophilic Anaerobic Co-Digestion of Swine Manure with Corn Stover and Microbial Community Analysis. Microorganisms 2020; 8:microorganisms8020188. [PMID: 32013160 PMCID: PMC7074675 DOI: 10.3390/microorganisms8020188] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/28/2020] [Accepted: 01/28/2020] [Indexed: 01/12/2023] Open
Abstract
Long-term anaerobic co-digestion of swine manure (SM) and corn stover (CS) was conducted using semi-continuously loaded digesters under mesophilic conditions. A preliminary test was first conducted to test the effects of loading rates, and results indicated the 3 g-VS L−1 d−1 was the optimal loading rate. Based on the preliminary results, a verification replicated test was conducted with 3 g-VS L−1 d−1 loading rate and different SM/CS ratios (1:1, 2:1 and 1:2). Results showed that a SM/CS ratio of 2/1 was optimal, based on maximum observed methane-VSdes generation and carbon conversion efficiency (72.56 ± 3.40 mL g−1 and 40.59%, respectively). Amplicon sequencing analysis suggested that microbial diversity was increased with CS loading. Amino-acid-degrading bacteria were abundant in the treatment groups. Archaea Methanoculleus could enhance biogas and methane productions.
Collapse
Affiliation(s)
- Haipeng Wang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Agro-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (H.W.); (W.Z.); (C.X.); (L.Y.)
| | - Teng Teeh Lim
- Agriculture Systems Management, Division of Food Systems and Bioengineering, University of Missouri, Columbia, MO 65211-5200, USA; (T.T.L.); (C.D.)
| | - Cuong Duong
- Agriculture Systems Management, Division of Food Systems and Bioengineering, University of Missouri, Columbia, MO 65211-5200, USA; (T.T.L.); (C.D.)
| | - Wei Zhang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Agro-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (H.W.); (W.Z.); (C.X.); (L.Y.)
| | - Congfeng Xu
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Agro-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (H.W.); (W.Z.); (C.X.); (L.Y.)
| | - Lei Yan
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Agro-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (H.W.); (W.Z.); (C.X.); (L.Y.)
| | - Zili Mei
- Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Chengdu 610041, China;
| | - Weidong Wang
- Heilongjiang Provincial Key Laboratory of Environmental Microbiology and Recycling of Agro-Waste in Cold Region, College of Life Science and Biotechnology, Heilongjiang Bayi Agricultural University, Daqing 163319, China; (H.W.); (W.Z.); (C.X.); (L.Y.)
- Correspondence: ; Tel.: +86-13836729365
| |
Collapse
|
12
|
Zhang J, Luo W, Wang Y, Li G, Liu Y, Gong X. Anaerobic cultivation of waste activated sludge to inoculate solid state anaerobic co-digestion of agricultural wastes: Effects of different cultivated periods. BIORESOURCE TECHNOLOGY 2019; 294:122078. [PMID: 31525587 DOI: 10.1016/j.biortech.2019.122078] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/24/2019] [Accepted: 08/26/2019] [Indexed: 06/10/2023]
Abstract
This study investigated effects of waste activated sludge (WAS) after anaerobic cultivation as inoculum on solid-state anaerobic digestion (SSAD) of agricultural wastes. WAS was anaerobically cultivated for 0, 20 and 50 days and then used as inoculum for co-digestion at substrate/inoculum (S/I) ratios of 2 and 4, respectively. Results showed that treatments inoculated with cultivated WAS exhibited better buffering capability. The highest cumulative methane production (218 L/kg VS) was achieved when inoculating WAS after 50 days of cultivation at the S/I ratio of 2. Fresh WAS without any anaerobic cultivation as inoculum led to digestion instability with significant acidification and limited biogas production, particularly at the S/I ratio of 4. Microbial analysis deciphered that Methanosarcina was the dominant archaea in all treatments and its relative abundance increased with the extension of WAS cultivation time. Hence, WAS after prolonged anaerobic cultivation could be a favorable inoculum for SSAD of agricultural wastes.
Collapse
Affiliation(s)
- Jiaxing Zhang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Wenhai Luo
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Yaya Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China; College of Mechanical and Electrical Engineering, Agriculture University of Hebei, Baoding, Hebei 071000, China
| | - Guoxue Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Yifei Liu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Xiaoyan Gong
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Science, China Agricultural University, Beijing 100193, China.
| |
Collapse
|
13
|
Surra E, Bernardo M, Lapa N, Esteves IAAC, Fonseca I, Mota JPB. Biomethane production through anaerobic co-digestion with Maize Cob Waste based on a biorefinery concept: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 249:109351. [PMID: 31419673 DOI: 10.1016/j.jenvman.2019.109351] [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: 06/06/2018] [Revised: 06/10/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
Maize Cob Waste (MCW) is available worldwide in high amounts, as maize is the most produced cereal in the world. MCW is generally left in the crop fields, but due to its low biodegradability it has a negligible impact in soil fertility. Moreover, MCW can be used as substrate to balance the C/N ratio during the Anaerobic co-Digestion (AcoD) with other biodegradable substrates, and is an excellent precursor for the production of Activated Carbons (ACs). In this context, a biorefinery is theoretically discussed in the present review, based on the idea that MCW, after proper pre-treatment is valorised as precursor of ACs and as co-substrate in AcoD for biomethane generation. This paper provides an overview on different scientific and technological aspects that can be involved in the development of the proposed biorefinery; the major topics considered in this work are the following ones: (i) the most suitable pre-treatments of MCW prior to AcoD; (ii) AcoD process with regard to the critical parameters resulting from MCW pre-treatments; (iii) production of ACs using MCW as precursor, with the aim to use these ACs in biogas conditioning (H2S removal) and upgrading (biomethane production), and (iv) an overview on biogas upgrading technologies.
Collapse
Affiliation(s)
- Elena Surra
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal
| | - Maria Bernardo
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal
| | - Nuno Lapa
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal.
| | - Isabel A A C Esteves
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal.
| | - Isabel Fonseca
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal
| | - José P B Mota
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516, Caparica, Portugal
| |
Collapse
|
14
|
Effects of Two-Stage Operation on Stability and Efficiency in Co-Digestion of Food Waste and Waste Activated Sludge. ENERGIES 2019. [DOI: 10.3390/en12142748] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The two-stage anaerobic digestion (AD) technology attracts increasing attention due to its ability to collect both hydrogen and methane. A two-stage AD system feeding with food waste and waste activated sludge was investigated in order to achieve higher energy yield and organics removal. The two-stage process consists of a thermophilic H2-reactor and a mesophilic CH4-reactor, achieved the highest hydrogen and methane yields of 76.8 mL/g-VS and 147.6 mL/g-VS at hydraulic retention times (HRTs) of 0.8 d and 6 d, respectively. The co-digestion process in this study required much less external alkalinity to maintain the pH values than sole food waste digestion in the literature. Compared with the single-stage mesophilic methane AD process, the two-stage AD system had better performance on operation stability, biogas and energy yields, organics removal and chemical oxygen demand (COD) conversion at high organic loading rates (OLRs). According to the TA-cloning analysis, the dominant bacteria in H2-reactor was closely related to Clostridium sp. strain Z6 and species Thermoanaerobacterium thermosaccharolyticum. The dominant methanogens in two-stage and single-stage CH4-reactor were recognized as acetotrophic methanogens and hydrogenotrophic methanogens, respectively. The presence of the genus Nitrososphaera in the two CH4-reactors might contribute to the low NH4+-N concentration in digestate and low CO2 content in biogas.
Collapse
|
15
|
A New Adjustment Strategy to Relieve Inhibition during Anaerobic Codigestion of Food Waste and Cow Manure. SUSTAINABILITY 2019. [DOI: 10.3390/su11102819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new adjustment strategy (controlling temperature, pH, inoculum dose, and liquid supernatant replacement in different digestion stages) was used to relieve volatile fatty acid (VFA) inhibition during anaerobic codigestion of FW and CM. Three digestion stages and groups were designed: initial stage (on days 1–5 the temperature was 45 °C), the second stage (on days 6–10 the temperature was 35 °C and inoculum was supplied), and the third stage (on days 11–50 the temperature was 35 °C and liquid supernatant was replaced). Groups A, B, and C had initial inoculums of 0, 100, and 200 mL and were supplied inoculums of 200, 100, and 0 mL, respectively. Results showed that in the initial stage, Group A had the highest VFA concentration (876.54 mg/L) and the lowest pH (3.6). In the second and third stages, pH (~5.5 and ~7.5) and VFA concentrations showed no significant differences in all groups. The highest VFA concentration (3248 mg/L), volatile solid (VS) removal rate (49.72%), and total methane production (TMP) (10,959 mL), the shortest λ (19.92 d), and the T90% (39.25 d) were obtained in Group B (pH 8.5). Group C had the highest chemical oxygen demand (COD) removal rate (96.91%). Group A obtained the maximal TBP of 25,626 mL (pH 8.0).
Collapse
|
16
|
Chen X, Gao M, Li Y, Zhang X, Zhang F, Hu B. Effects of freeze-thaw cycles on the physicochemical characteristics of animal manure and its phosphorus forms. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 88:160-169. [PMID: 31079628 DOI: 10.1016/j.wasman.2019.03.039] [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: 10/24/2018] [Revised: 03/14/2019] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
The variations of phosphorus (P) in animal manure during freeze-thaw cycles (FTCs) profoundly influence on non-point source P loss in winter. Therefore, understanding how FTCs influence the physicochemical properties of animal manure and its P availability is crucial. In this study, the freeze-thaw treatment was performed by incubating the pig manure at -20 °C for 12 h and at 18 °C for 12 h. The freeze-only treatment was maintained at -20 °C as a control. In addition, the pig manure was kept at two moisture levels during the FTCs and sampled every five cycles. Six forms of P in the manure were extracted and analyzed. After 30 cycles, the dissolved organic carbon had increased from 10.49 to 13.56 g/kg, and the pH had decreased from 6.25 to 5.77. The particles originally >1000 μm were broken into particles <250 μm. The forms of P in manure shifted from Ca-P, occluded P, and residual P towards NH4Cl-P, Al-P and Fe-P, resulting in a 23% increase in bioavailable P. These variations were highly coincident with the increase in moisture content and FTC frequency. The proportion of particles <38 μm increased by more than 2% after the FTCs, and the manure P was mainly concentrated in these particles, which might be readily washed away by the melt water. Overall, the study indicated that FTCs could enhance the bioavailability of P in pig manure and the mobility of particle-associated P. These findings are significant for reducing animal manure pollution in freeze-thaw season.
Collapse
Affiliation(s)
- Xingcai Chen
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 100875 Beijing, China
| | - Min Gao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 100875 Beijing, China
| | - Yanxia Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 100875 Beijing, China.
| | - Xuelian Zhang
- Beijing Soil and Fertilizer Extension Service Station, Beijing 100029, China
| | - Fengsong Zhang
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101 Beijing, China
| | - Baiyang Hu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, 100875 Beijing, China
| |
Collapse
|
17
|
Zhang L, Loh KC, Zhang J. Enhanced biogas production from anaerobic digestion of solid organic wastes: Current status and prospects. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2018.07.005] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
18
|
Influence of Temperature on Biogas Production Efficiency and Microbial Community in a Two-Phase Anaerobic Digestion System. WATER 2019. [DOI: 10.3390/w11010133] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the influence of temperature on biogas production efficiency and the microbial community structure was investigated in a two-phase anaerobic digestion reactor for co-digestion of cow manure and corn straw. The results illustrated that the contents of solluted chemical oxygen demand (SCOD) and volatile fatty acid (VFA) in the acidogenic phase and biogas production in the methanogenic phase maintained relatively higher levels at temperatures ranging from 35–25 °C. The methane content of biogas production could be maintained higher than 50% at temperatures above 25 °C. The microbial community structure analysis indicated that the dominant functional bacteria were Acinetobacter, Acetitomaculum, and Bacillus in the acidogenic phase and Cenarchaeum in the methanogenic phase at 35–25 °C. However, the performances of the acidogenic phase and the methanogenic phase could be significantly decreased at a lower temperature of 20 °C, and microbial activity was inhibited obviously. Accordingly, a low temperature was adverse for the performance of the acidogenic and methanogenic phases, while moderate temperatures above 25 °C were more conducive to high biogas production efficiency.
Collapse
|
19
|
Jiang Y, Dennehy C, Lawlor PG, Hu Z, McCabe M, Cormican P, Zhan X, Gardiner GE. Inhibition of volatile fatty acids on methane production kinetics during dry co-digestion of food waste and pig manure. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 79:302-311. [PMID: 30343759 DOI: 10.1016/j.wasman.2018.07.049] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/04/2018] [Accepted: 07/27/2018] [Indexed: 05/16/2023]
Abstract
Compared with wet digestion, dry digestion of organic wastes reduces reactor volume and requires less energy for heating, but it is easily inhibited by high volatile fatty acid (VFA) or ammonia concentration. The inhibition on methane production kinetics during dry co-digestion of food waste and pig manure is rarely reported. The aim of this study was to explore the inhibition mechanisms and the microbial interactions in food waste and pig manure dry co-digestion systems at different inoculum rates (25% and 50% based on volatile solids) and food waste/pig manure ratios (0:100, 25:75, 50:50, 75:25 and 100:0 based on volatile solids). The results showed that the preferable operation conditions were obtained at the inoculum rate of 50% and food waste/pig manure ratio of 50:50, with a specific methane yield of 263 mL/g VSadded. High VFA concentration was the main inhibition factor on methane production, and the threshold VFA inhibition concentrations ranged 16.5-18.0 g/L. Syntrophic oxidation with hydrogenotrophic methanogenesis might be the main methane production pathway in dry co-digestion systems due to the dominance of hydrogenotrophic methanogens in the archaeal community. In conclusion, dry co-digestion of food waste and pig manure is feasible for methane production without pH adjustment and can be operated stably by choosing proper operation conditions.
Collapse
Affiliation(s)
- Yan Jiang
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Conor Dennehy
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Peadar G Lawlor
- Teagasc, Pig Development Department, Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - Zhenhu Hu
- School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Matthew McCabe
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Paul Cormican
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Xinmin Zhan
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland.
| | - Gillian E Gardiner
- Department of Science, Waterford Institute of Technology, Waterford, Ireland
| |
Collapse
|
20
|
Thermophilic Anaerobic Digestion: Enhanced and Sustainable Methane Production from Co-Digestion of Food and Lignocellulosic Wastes. ENERGIES 2018. [DOI: 10.3390/en11082058] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This article aims to study the codigestion of food waste (FW) and three different lignocellulosic wastes (LW) (Corn stover (CS), Prairie cordgrass (PCG), and Unbleached paper (UBP)) for thermophilic anaerobic digestion to overcome the limitations of digesting food waste alone (volatile fatty acids accumulation and low C:N ratio). Using an enriched thermophilic methanogenic consortium, all the food and lignocellulosic waste mixtures showed positive synergistic effects of codigestion. After 30 days of incubation at 60 °C (100 rpm), the highest methane yield of 305.45 L·kg−1 volatile solids (VS) was achieved with a combination of FW-PCG-CS followed by 279.31 L·kg−1 VS with a mixture of FW-PCG. The corresponding volatile solids reduction for these two co-digestion mixtures was 68% and 58%, respectively. This study demonstrated a reduced hydraulic retention time for methane production using FW and LW.
Collapse
|
21
|
Yang T, Wang J, Li B, Kai X, Xing W, Li R. Behaviors of rice straw two-step liquefaction with sub/supercritical ethanol in carbon dioxide atmosphere. BIORESOURCE TECHNOLOGY 2018; 258:287-294. [PMID: 29547851 DOI: 10.1016/j.biortech.2018.02.099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 02/20/2018] [Accepted: 02/21/2018] [Indexed: 06/08/2023]
Abstract
This study extended previous work investigating two-step liquefaction by supercritical ethanol of rice straw under CO2 atmosphere at temperatures of 270-345 °C. Subcritical CO2-subcritical ethanol (SubCO2-SubEtOH) pretreatment decreased the content of lignin in the rice stalk from 22.94 to 21.43 wt%. The results showed that although oxygen-transfer reaction, transesterification, carbonylation, and other reactions may occur with the supercritical CO2-supercritical ethanol (ScCO2-ScEtOH) liquefaction reactions, transesterification was the main reaction. The "de-oxygen-transfer" reaction mainly comprised de-oxygenation and decarboxylation. For temperatures exceeding 320 °C, the bio-oil yield decreased because the effects of esters decreased. The residence time affected the H/C and O/C ratios to a minor extent. It was shown that the nucleophilic and hydrolytic functions of ethanol might be strengthened, generating higher amounts of ester, phenolic, acidic, and hydrocarbon derivatives in the bio-oil fraction.
Collapse
Affiliation(s)
- Tianhua Yang
- School of Energy and Environment, Shenyang Aerospace University, Shenyang Aerospace University, Key Laboratory of Clean Energy, Shenyang 110036, China.
| | - Jian Wang
- School of Energy and Environment, Shenyang Aerospace University, Shenyang Aerospace University, Key Laboratory of Clean Energy, Shenyang 110036, China
| | - Bingshuo Li
- School of Environmental Science and Engineering, Tianjin University,Tianjin 300072, PR China
| | - Xingping Kai
- School of Energy and Environment, Shenyang Aerospace University, Shenyang Aerospace University, Key Laboratory of Clean Energy, Shenyang 110036, China
| | - Wanli Xing
- School of Energy and Environment, Shenyang Aerospace University, Shenyang Aerospace University, Key Laboratory of Clean Energy, Shenyang 110036, China
| | - Rundong Li
- School of Energy and Environment, Shenyang Aerospace University, Shenyang Aerospace University, Key Laboratory of Clean Energy, Shenyang 110036, China
| |
Collapse
|
22
|
Ma J, Lei Y, Rehman KU, Yu Z, Zhang J, Li W, Li Q, Tomberlin JK, Zheng L. Dynamic Effects of Initial pH of Substrate on Biological Growth and Metamorphosis of Black Soldier Fly (Diptera: Stratiomyidae). ENVIRONMENTAL ENTOMOLOGY 2018; 47:159-165. [PMID: 29325020 DOI: 10.1093/ee/nvx186] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 05/12/2023]
Abstract
Edible insects have become a recognized alternative and sustainable source of high-quality proteins and fats for livestock or human consumption. In the production process of black soldier fly (BSF), (Hermetia illucens L. [Diptera: Stratiomyidae]), initial substrate pH is a critical parameter to ensure the best value of insect biomass, life history traits, and quality bio-fertilizer. This study examined the impact of initial pH values on BSF larvae production, development time, and adult longevity. The BSF were reared on artificial diet with initial pH of 2.0, 4.0, 6.0, 8.0, and 10.0; the control was set at 7.0. Final BSF larval weight was significantly greater in substrates having initial pH 6.0 (0.21 g), control 7.0 (0.20 g), and 10.0 (0.20 g) with no significant difference among them, whereas larval weight reared with initial pH 2.0 and 4.0 were lowest at 0.16 g (-23%). Prepupal weight was greatest when larvae were reared on substrates with initial pH 6.0 (0.18 g), control 7.0 (0.19 g), 8.0 (0.18 g), and 10.0 (0.18 g). In contrast, the prepupal weight of larvae reared on diets with initial pH 2.0 was lowest at 0.15 g (-22%). Larval development time was 21.19 d at pH 8.0, about 3 d (12.5%) shorter than that of those reared on diets with initial pH 6.0, 7.0 control, and 10.0. In all treatments, pH shifted to 5.7 after 3-4 d and 8.5 after 16-17 d except for two groups (2.0 and 4.0) where the pH remained slightly acidic 5.0 and 6.5, respectively.
Collapse
Affiliation(s)
- Junhua Ma
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Yanyan Lei
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Kashif Ur Rehman
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
- Livestock and dairy development department, Government of Punjab, Pakistan
| | - Ziniu Yu
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Jibin Zhang
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Wu Li
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Qing Li
- College of Science, Huazhong Agricultural University, Wuhan, P. R. China
| | | | - Longyu Zheng
- State Key Laboratory of Agricultural Microbiology, National Engineering Research Center of Microbial Pesticides, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| |
Collapse
|
23
|
Surra E, Bernardo M, Lapa N, Esteves I, Fonseca I, Mota JP. Maize cob waste pre-treatments to enhance biogas production through co-anaerobic digestion with OFMSW. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 72:193-205. [PMID: 29169860 DOI: 10.1016/j.wasman.2017.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 10/26/2017] [Accepted: 11/01/2017] [Indexed: 06/07/2023]
Abstract
In the present work, the enhancement of biogas and methane yields through anaerobic co-digestion of the pre-hydrolised Organic Fraction of Municipal Solid Wastes (hOFMSW) and Maize Cob Wastes (MCW) in a lab-scale thermophilic anaerobic reactor was tested. In order to increase its biodegradability, MCW were submitted to an initial pre-treatment screening phase as follows: (i) microwave (MW) irradiation catalysed by NaOH, (ii) MW catalysed by glycerol in water and alkaline water solutions, (iii) MW catalysed by H2O2 with pH of 9.8 and (iv) chemical pre-treatment at room temperature catalysed by H2O2 with 4 h reaction time. The pre-treatments cataysed by H2O2 were performed with 2% MCW (wMCW/v alkaline water) at ratios of 0.125, 0.25, 0.5 and 1.0 (wH2O2/wMCW). The pre-treatment that presented the most favourable balance between sugars, lignin, cellulose and hemicellulose solubilisations, as well as low production of phenolic compound and furfural (inhibitors), was the chemical pre-treatment catalysed by H2O2, at room temperature, with a ratio of 0.5 wH2O2/wMCW (Pre1). This Pre1 was then optimised testing reaction times of 1, 2 and 3 days at a different pH (11.5) and MCW percentage (10% w/v). The optimised pre-treatment that presented the best results, considering the same criteria defined above, was the one carried out during 3 days, at pH 9.8 and 10% MCW w/v (Pre2). The anaerobic reactor was initially fed with the hOFMSW obtained from the hydrolysis tank of an industrial AD plant. The hOFMSW was than co-digested with MCW submitted to the pre-treatment Pre1. In another assay, hOFMSW was co-digested with MCW submitted pre-treatment Pre 2. The co-digestion of hOFMSW + Pre1 increased the biogas yield by 38.9% and methane yield by 29.7%, when compared to the results obtained with hOFMSW alone. The co-digestion of hOFMSW + Pre2 increased biogas yield by 46.0% and CH4 yield by 36.3%. In both cases, the methane content obtained in the biogas streams was above 66% v/v. These results show that pre-treatment with H2O2, at room temperature, is a promising low cost way to valorize MCW through co-digestion with hOFMSW.
Collapse
Affiliation(s)
- Elena Surra
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Maria Bernardo
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Nuno Lapa
- LAQV-REQUIMTE, Departamento de Ciências e Tecnologia da Biomassa, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Isabel Esteves
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Isabel Fonseca
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - José Paulo Mota
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| |
Collapse
|
24
|
Zhang R, Anderson E, Addy M, Deng X, Kabir F, Lu Q, Ma Y, Cheng Y, Liu Y, Chen P, Ruan R. An innovative intermittent-vacuum assisted thermophilic anaerobic digestion process for effective animal manure utilization and treatment. BIORESOURCE TECHNOLOGY 2017; 244:1073-1080. [PMID: 28851163 DOI: 10.1016/j.biortech.2017.08.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
Intermittent-vacuum stripping (IVS) was developed as a pretreatment for thermophilic anaerobic digestion (TAD) to improve methanogenesis and hydrolysis activity through preventing free ammonia and hydrogen sulfide (H2S) inhibition from liquid swine manure (LSM). Over 98% of ammonia and 38% organic nitrogen were removed in 60min from 55°C to 85°C with vacuum pressure (from 100.63±3.79mmHg to 360.91±7.39mmHg) at initial pH 10.0 by IVS. Thermophilic methanogenesis and hydrolysis activity of pretreated LSM increased 52.25% (from 11.56±1.75% to 17.60±0.49%) in 25days and 40% (from 10days to 6days) in bio-methane potential assay. Over 80% H2S and total nitrogen were removed by IVS assistance, while around 70% nitrogen was recycled as ammonium sulfate. Therefore, IVS-TAD combination could be an effective strategy to improve TAD efficiency, whose elution is more easily utilized in algae cultivation and/or hydroponic system.
Collapse
Affiliation(s)
- Renchuan Zhang
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Erik Anderson
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Min Addy
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Xiangyuan Deng
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Fayal Kabir
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Qian Lu
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Yiwei Ma
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Yanling Cheng
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Yuhuan Liu
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Paul Chen
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
| | - Roger Ruan
- Center for Biorefining, and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA; Nanchang University, China.
| |
Collapse
|
25
|
Awe OW, Zhao Y, Nzihou A, Pham Minh D, Lyczko N. Anaerobic co-digestion of food waste and FOG with sewage sludge – realising its potential in Ireland. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/00207233.2017.1380335] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Olumide Wesley Awe
- School of Civil Engineering, Dooge Centre for Water Resources Research, University College Dublin, Dublin, Ireland
| | - Yaqian Zhao
- School of Civil Engineering, Dooge Centre for Water Resources Research, University College Dublin, Dublin, Ireland
| | - Ange Nzihou
- Mines Albi, CNRS UMR 5302, Centre RAPSODEE, Université de Toulouse, Albi, France
| | - Doan Pham Minh
- Mines Albi, CNRS UMR 5302, Centre RAPSODEE, Université de Toulouse, Albi, France
| | - Nathalie Lyczko
- Mines Albi, CNRS UMR 5302, Centre RAPSODEE, Université de Toulouse, Albi, France
| |
Collapse
|
26
|
Wang Y, Zang B, Gong X, Liu Y, Li G. Effects of pH buffering agents on the anaerobic hydrolysis acidification stage of kitchen waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 68:603-609. [PMID: 28662845 DOI: 10.1016/j.wasman.2017.06.041] [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: 03/21/2017] [Revised: 06/15/2017] [Accepted: 06/21/2017] [Indexed: 06/07/2023]
Abstract
This study investigated effects of initial pH buffering agents on the lab-scale anaerobic hydrolysis acidification stage of kitchen waste (KW). Different cheap, available and suitable buffering agents (NaOH(s), NaOH(l), CaO(s)-NaOH, KOH(l)-NaOH, K2HPO4(s)-KOH, Na2CO3(s)-NaOH) were added under optimal adjusting mode (first two days: per 16h, after: one time per day) which was obtained in previous work. The effects of buffering agents were evaluated according to indexes of pH, VFAs, NH4+-N, TS, VS, VS/TS, TS and VS removal rate. The results showed treatment 5 with adding K2HPO4-KOH buffering agents had the most stable pH (6.7-7.0). Also treatment 5, 2, 4 and 6 provided stable pH ranging in 5-8. Among the treatments, treatment 6 with adding Na2CO3 as initial buffering agents and 10mol/L NaOH as regulator was chosen as the optimal mode for highest VFAs content (44.05g/L) with high acetic acid and butyrate acid proportion (42.64%), TS and VS removal rate (44.84% and 58.67%, respectively), low VS/TS ratio (58.55), fewer adding dosage and low adjusting frequency. The VFAs content of treatment 6 at the end of hydrolysis acidification stage could be used for methanogenic phase of anaerobic two-phase digestion. Thus, treatment 6 (adding Na2CO3 as initial buffering agents and 10mol/L NaOH as regulator) with highest VFAs content and TS and VS removal rate could be considered using in anaerobic hydrolysis acidification stage pH adjustment.
Collapse
Affiliation(s)
- Yaya Wang
- College of Agronomy/Center of Biomass Engineering, China Agricultural University, Beijing 100193, China; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Bing Zang
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Xiaoyan Gong
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Yu Liu
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Guoxue Li
- College of Agronomy/Center of Biomass Engineering, China Agricultural University, Beijing 100193, China; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China.
| |
Collapse
|
27
|
Wang C, Hong F, Lu Y, Li X, Liu H. Improved biogas production and biodegradation of oilseed rape straw by using kitchen waste and duck droppings as co-substrates in two-phase anaerobic digestion. PLoS One 2017; 12:e0182361. [PMID: 28767709 PMCID: PMC5540530 DOI: 10.1371/journal.pone.0182361] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 07/17/2017] [Indexed: 11/18/2022] Open
Abstract
Oilseed rape straw (ORS) is a kind of biorefractory waste widely existing in the rural area of China, which is highly suitable to mix with kitchen waste (KW) and duck droppings (DD) in two-phase anaerobic digestion (AD). This research introduced the importance of KW and DD addition to improve the biogas production and biodegradation of ORS. A set of comparative experiments were conducted on two-phase mono- and co-digestion with organic load of 60 g VS/L. The total methane yield (TMY) and the biodegradation of ORS of co-digestions were obviously improving, and the synergistic effect found in the two-phase co-digestions. The optimum mixing ratio of ORS, KW and DD was 50:40:10, and the corresponding TMY and VS degradation rate of ORS were 374.5 mL/g VS and 49.7%, respectively. Addition of KW and DD maintained the pH within the optimal range for the hydrolyzing-acidification, improved the phase separation and buffering capacity of AD system.
Collapse
Affiliation(s)
- Chuqiao Wang
- School of Energy and Environment, Southeast University, Nanjing, China
| | - Feng Hong
- School of Energy and Environment, Southeast University, Nanjing, China
| | - Yong Lu
- School of Energy and Environment, Southeast University, Nanjing, China
| | - Xianning Li
- School of Energy and Environment, Southeast University, Nanjing, China
| | - Hengming Liu
- Ocean Science and Environment College, Dalian ocean University, Dalian, China
| |
Collapse
|
28
|
Wang Y, Ren G, Zhang T, Zou S, Mao C, Wang X. Effect of magnetite powder on anaerobic co-digestion of pig manure and wheat straw. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 66:46-52. [PMID: 28464983 DOI: 10.1016/j.wasman.2017.04.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 04/09/2017] [Accepted: 04/17/2017] [Indexed: 06/07/2023]
Abstract
This study investigated the effects of different amounts of magnetite powder (i.e., 0g, 1.5g, 3g, 4.5g, 6g) on the anaerobic co-digestion of pig manure (PM) and wheat straw (WS). The variations in pH, alkalinity, cellulase activity (CEA), dehydrogenase activity (DHA) and methane production, were analyzed by phases. Correlation of the activities of the two enzymes with methane production was also analyzed, and the Gompertz model was used to evaluate the efficiency of anaerobic digestion (AD) with the addition of magnetite powder. The results showed that magnetite powder had significant effects on the anaerobic co-digestion of PM and WS. The maximum total methane production with the addition of 3g of magnetite powder was 195mL/g total solids (TS), an increase of 72.1%. The CEA and DHA increased with magnetite powder in the ranges of 1.5-4.5g, 1.5-6g, respectively, while the methane production showed a better correlation with DHA than with CEA. Using the Gompertz model, the efficiency of AD was optimal when adding 3g magnetite powder, with higher methane production potential (206mL/g TS), shorter lag-phase time (14.9d) and shorter AD period (44d).
Collapse
Affiliation(s)
- Yanzi Wang
- College of Forestry, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China
| | - Guangxin Ren
- College of Agronomy, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China.
| | - Tong Zhang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China
| | - Shuzhen Zou
- College of Agronomy, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China
| | - Chunlan Mao
- College of Agronomy, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China
| | - Xiaojiao Wang
- College of Agronomy, Northwest A&F University, Yangling 712100, Shannxi, China; Research Center of Recycle Agricultural Engineering and Technology of Shannxi Province, Yangling 712100, Shannxi, China
| |
Collapse
|
29
|
Sun MT, Fan XL, Zhao XX, Fu SF, He S, Manasa MRK, Guo RB. Effects of organic loading rate on biogas production from macroalgae: Performance and microbial community structure. BIORESOURCE TECHNOLOGY 2017; 235:292-300. [PMID: 28371767 DOI: 10.1016/j.biortech.2017.03.075] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/10/2017] [Accepted: 03/11/2017] [Indexed: 06/07/2023]
Abstract
Macroalgae biomass has been considered as a promising feedstock for biogas production. In order to improve the efficiency of anaerobic digestion (AD) of macroalgae, semi-continuous fermentation was conducted to examine the effects of organic loading rate (OLR) on biogas production from Macrocystis pyrifer. Results showed that, under OLRs of 1.37, 2.74, 4.12 and 6.85kgVSsubstrate/(m3·d), the average unit biogas yields were 438.9, 477.3, 480.1 and 188.7mL/(gVSsubstrated), respectively. It indicated that biogas production was promoted by the increased OLR in an appropriate range while inhibited by the OLR beyond the appropriate range. The investigation on physical-chemical parameters revealed that unfavorable VFAs concentration, pH and salinity might be the main causes for system failure due to the overrange OLR, while the total phenols failed to reach the inhibitory concentration. Microbial community analysis demonstrated that several bacterial and archaeal phyla altered with increase in OLR apparently.
Collapse
Affiliation(s)
- Meng-Ting Sun
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Xiao-Lei Fan
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101, PR China
| | - Xiao-Xian Zhao
- Jizhou Hebei Middle School, Hengshui, Hebei 053200, PR China
| | - Shan-Fei Fu
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Shuai He
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - M R K Manasa
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Rong-Bo Guo
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, 189 Songling Road, Qingdao, Shandong 266101, PR China.
| |
Collapse
|
30
|
Yang Q, Wei LH, Li WZ, Chen Y, Ju MT. Effects of Feedstock Sources on Inoculant Acclimatization: Start-up Strategies and Reactor Performance. Appl Biochem Biotechnol 2017; 183:729-743. [DOI: 10.1007/s12010-017-2460-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 03/13/2017] [Indexed: 11/30/2022]
|
31
|
Yang T, Wang J, Li B, Kai X, Li R. Effect of residence time on two-step liquefaction of rice straw in a CO 2 atmosphere: Differences between subcritical water and supercritical ethanol. BIORESOURCE TECHNOLOGY 2017; 229:143-151. [PMID: 28110231 DOI: 10.1016/j.biortech.2016.12.110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 12/29/2016] [Accepted: 12/30/2016] [Indexed: 06/06/2023]
Abstract
This study investigated the influence of temperature and residence time on liquefaction of rice straw in subcritical CO2-subcritical water (subCO2-subH2O) and in subcritical CO2-supercritical ethanol (subCO2-scEtOH), considering the final reaction temperatures (270-345°C) and residence times (15 and 30min). Residence time was identified as a crucial parameter in the subCO2-subH2O liquefaction, whereas residence time had a marginal influence on subCO2-scEtOH liquefaction. When reaction conditions were 320°C and 15min, solvents have weak impact on the quality of bio-oil, HHV 28.57MJ/kg and 28.62MJ/kg, respectively. There was an obvious difference between the subCO2-subH2O and subCO2-scEtOH liquefaction mechanisms. In subCO2-subH2O, CO2 promoted the carbonyl reaction. In subCO2-scEtOH, supercritical ethanol have the function of donating hydrogen and promoting the reaction of hydroxyl-alkylation.
Collapse
Affiliation(s)
- Tianhua Yang
- Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, PR China
| | - Jian Wang
- Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, PR China
| | - Bingshuo Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China
| | - Xingping Kai
- Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, PR China
| | - Rundong Li
- Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, PR China.
| |
Collapse
|
32
|
Effects of Biogas Substrate Recirculation on Methane Yield and Efficiency of a Liquid-Manure-Based Biogas Plant. ENERGIES 2017. [DOI: 10.3390/en10030325] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
33
|
Distribution of sulfonamides in liquid and solid anaerobic digestates: effects of hydraulic retention time and swine manure to rice straw ratio. Bioprocess Biosyst Eng 2016; 40:319-330. [DOI: 10.1007/s00449-016-1699-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 10/19/2016] [Indexed: 11/26/2022]
|
34
|
Zhou J, Zhang R, Liu F, Yong X, Wu X, Zheng T, Jiang M, Jia H. Biogas production and microbial community shift through neutral pH control during the anaerobic digestion of pig manure. BIORESOURCE TECHNOLOGY 2016; 217:44-49. [PMID: 26944458 DOI: 10.1016/j.biortech.2016.02.077] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/17/2016] [Accepted: 02/19/2016] [Indexed: 06/05/2023]
Abstract
Laboratory-scale reactors, in which the pH could be auto-adjusted, were employed to investigate the mesophilic methane fermentation with pig manure (7.8% total solids) at pH 6.0, 7.0, and 8.0. Results showed that the performance of anaerobic digestion was strongly dependent on pH value. Biogas production and methane content at neutral pH 7.0 were significantly higher (16,607mL, 51.81%) than those at pH 6.0 (6916mL, 42.9%) and 8.0 (9739mL, 35.6%). Denaturing gradient gel electrophoresis fingerprinting and Shannon's index indicated that the samples contained highly diverse microbial communities. The major genus at pH 7.0 was Methanocorpusculum, compared with that was Methanosarcina at both pH 6.0 and 8.0. Our research revealed that cultures maintained at pH 7.0 could support increased biogas production, which has significant implications for the scale-up biogas engineering.
Collapse
Affiliation(s)
- Jun Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Rui Zhang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Fenwu Liu
- Environmental Engineering Laboratory, College of Resource and Environment, Shanxi Agricultural University, Taigu 030801, China
| | - Xiaoyu Yong
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Xiayuan Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Tao Zheng
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Min Jiang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Honghua Jia
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China.
| |
Collapse
|
35
|
Wang Y, Zang B, Li G, Liu Y. Evaluation the anaerobic hydrolysis acidification stage of kitchen waste by pH regulation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 53:62-7. [PMID: 27156363 DOI: 10.1016/j.wasman.2016.04.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 03/22/2016] [Accepted: 04/13/2016] [Indexed: 05/28/2023]
Abstract
This study analyzed the composition and characteristic of kitchen waste (KW) from closed cleaning station of Chaoyang District, Beijing. It was featured by high vegetables and peels contents. This study investigated effect of pH regulation and uncontrolled pH (CK) on the lab-scale anaerobic hydrolysis acidification stage of KW. The optimal adjusting mode by NaOH (including dosage and frequency) was evaluated according to indexes of pH, VFAs, NH4(+)-N, TS, VS, TS/VS, TS and VS removal rate. The treatment 4 as first two days adjusting per 16h and then one time per day at pH 7 was chosen as the optimal mode with high VFAs content(47.31g/L), TS and VS removal rate (42.95% and 54.01%, respectively), low adjusting frequency, fewer dosage and practical operability. Thus, adjusting mode of treatment 4 could be considered using in anaerobic hydrolysis acidification stage on engineering.
Collapse
Affiliation(s)
- Yaya Wang
- College of Agronomy and Biotechnology/Center of Biomass Engineering, China Agricultural University, Beijing 100193, China; College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Bing Zang
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| | - Guoxue Li
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China.
| | - Yu Liu
- College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China
| |
Collapse
|
36
|
Cestonaro do Amaral A, Kunz A, Radis Steinmetz RL, Scussiato LA, Tápparo DC, Gaspareto TC. Influence of solid-liquid separation strategy on biogas yield from a stratified swine production system. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 168:229-235. [PMID: 26716354 DOI: 10.1016/j.jenvman.2015.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
As the fourth largest swine producer and exporter, Brazil has increased its participation in the global swine production market. Generally, these units concentrate a large number of animals and generate effluents that must be correctly managed to prevent environmental impacts, being anaerobic digestion is an interesting alternative for treating these effluents. The low-volatile solid concentration in the manure suggests the need for solid-liquid separation as a tool to improve the biogas generation capacity. This study aimed to determine the influence of simplified and inexpensive solid-liquid separation strategies (screening and settling) and the different manures produced during each swine production phase (gestating and farrowing sow houses, nursery houses and finishing houses) on biogas and methane yield. We collected samples in two gestating sow houses (GSH-a and GSH-b), two farrowing sow houses (FSH-a and FSH-b), a nursery house (NH) and a finishing house (FH). Biochemical methane potential (BMP) tests were performed according to international standard procedures. The settled sludge fraction comprised 20-30% of the raw manure volume, which comprises 40-60% of the total methane yield. The methane potential of the settled sludge fraction was approximately two times higher than the methane potential of the supernatant fraction. The biogas yield differed among the raw manures from different swine production phases (GSH-a 326.4 and GSH-b 577.1; FSH-a 860.1 and FSH-b 479.2; NH -970.2; FH 474.5 NmLbiogas.gVS(-1)). The differences were relative to the production phase (feed type and feeding techniques) and the management of the effluent inside the facilities (water management). Brazilian swine production has increased his participation in the global market, been the fourth producer and the fourth exporter. The segregation of swine production in multiple sites has increased its importance, due to the possibilities to have more specialized units. Generally, these units concentrate a large number of animals and generate effluents that must be correctly managed to avoid environmental impact. Due to the biodegradability of manure, anaerobic digestion is an interesting alternative to treat these effluents. The low volatile solid concentration in the swine manure suggests the need for solid-liquid separation as a tool to improve biogas generation capacity. The present study aimed to determine the influence of simplified and cheap solid-liquid separation strategies (based on screening and settling) and different manure of each swine production phases (gestating and farrowing sows houses, nursery houses and finishing houses) on biogas and methane yield. We collected samples in two gestating sows house (GSH-a and GSH-b), two farrowing sows house (FSH-a and FSH-b), a nursery house (NH) and a finishing house (FH). The Biochemical Methane Production (BMP) tests were performed according to international standard procedure (VDI 4630). The settled sludge fraction responds for 20-30% of raw manure volume, producing 40-60% of the total methane yield. The methane potential of settled sludge fraction was about 2 times higher than the supernatant fraction. There are differences on biogas yield between the raw manure of different swine production phases (GSH-a 326.4 and GSH-b 577.1; FSH-a 860.1 and FSH-b 479.2; NH 970.2; FH 474.5 NmLbiogas.gVS(-1)). The differences are relative to production phase (feed type, feeding techniques, etc.), but also the management of the effluent inside the facilities (water management).
Collapse
Affiliation(s)
| | - Airton Kunz
- Western Paraná State University, UNIOESTE/CCET/PGEAGRI Cascavel, PR, Brazil; Embrapa Swine and Poultry, Concórdia, SC, Brazil.
| | | | | | | | | |
Collapse
|
37
|
Geng Y, Zhang B, Du L, Tang Z, Li Q, Zhou Z, Yin X. Improving Methane Production During the Anaerobic Digestion of Waste Activated Sludge: Cao-ultrasonic Pretreatment and Using Different Seed Sludges. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.proenv.2016.02.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
38
|
Wei Y, Li X, Yu L, Zou D, Yuan H. Mesophilic anaerobic co-digestion of cattle manure and corn stover with biological and chemical pretreatment. BIORESOURCE TECHNOLOGY 2015; 198:431-436. [PMID: 26409855 DOI: 10.1016/j.biortech.2015.09.035] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 09/09/2015] [Accepted: 09/10/2015] [Indexed: 06/05/2023]
Abstract
Biological and chemical pretreatment methods using liquid fraction of digestate (LFD), ammonia solution (AS), and NaOH were compared in the process of mesophilic anaerobic co-digestion of cattle manure and corn stover. The results showed that LFD pretreatment could achieve the same effect as the chemical pretreatment (AS, NaOH) at the performance of anaerobic digestion (AD). Compared with the untreated corn stover, the cumulative biomethane production (CBP) and the volatile solid (VS) removal rate of three pretreatment methods were increased by 25.40-30.12% and 14.48-16.84%, respectively, in the co-digestion of cattle manure and corn stover. T80 was 20-37.14% shorter than that of the control test (35 ± 1 days). LFD pretreatment not only achieved the same effect as chemical pretreatment, but also reduced T80 and improved buffer capacity of anaerobic digestion system. Therefore, this study provides meaningful insight for exploring efficient pretreatment strategy to stabilize and enhance AD performance for practical application.
Collapse
Affiliation(s)
- Yufang Wei
- Centre for Resource and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Xiujin Li
- Centre for Resource and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Liang Yu
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
| | - Dexun Zou
- Centre for Resource and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, PR China
| | - Hairong Yuan
- Centre for Resource and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, PR China.
| |
Collapse
|