Article
Environmental Sciences
Li-Jie Wu, Xiao-Xiao Li, Fan Yang, Quan Zhou, Rui-Peng Ren, Yong-Kang Lyu
Summary: Anaerobic digestion is a promising waste-to-energy technology, with hyperthermophilic and thermophilic microbial communities showing potential for efficiency improvement. Mesophilic digested sludge was used as inoculum, with hyperthermophilic digestion exhibiting higher hydrolysis ratio and thermophilic digestion showing higher methane proportion. Methanogenesis was found to be limited in the hyperthermophilic digestion, indicating the need for a pre-fermentation stage at 70 degrees C for enhanced hydrolysis.
Article
Green & Sustainable Science & Technology
Afsane Sedighi, Mohsen Karrabi, Bahar Shahnavaz, Morteza Mostafavinezhad
Summary: This study investigated the potential for biogas production from anaerobic codigestion of the organic fraction of municipal solid waste and sewage sludge under mesophilic conditions. The results showed that the best outputs were achieved at TS = 5% and ISR = 2, with the highest biogas yield and methane production.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Environmental
Khaliyah Sani, Rattana Jariyaboon, Sompong O-Thong, Benjamas Cheirsilp, Prasad Kaparaju, Yi Wang, Prawit Kongjan
Summary: This study attempted to co-digest waste-activated sludge (WAS) and greasy sludge (GS) using a two-stage anaerobic digestion process. The results showed that this process was effective in stabilizing the waste and generating valuable bioenergy carriers.
Article
Agricultural Engineering
Pan Wang, Xinzi Wang, Xiteng Chen, Lianhai Ren
Summary: This study found that adding bentonite during anaerobic digestion of food waste can increase methane production and effectively reduce the abundance of antibiotic resistance genes (ARGs) in biogas residue. Bentonite and temperature were identified as major factors influencing the abundance of ARGs.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Rong Zhang, Min Zhang, Huaqian Mou, Zijing An, Hailu Fu, Xiaomei Su, Chongjun Chen, Jianrong Chen, Hongjun Lin, Faqian Sun
Summary: Kitchen waste biochar showed better performance in thermophilic co-digestion, reducing the digestion time and increasing methane production. It also improved the microbial community structure and enhanced the acetoclastic methanogenesis in thermophilic co-digestion.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Marco Chiappero, Francesca Cillerai, Franco Berruti, Ondrej Masek, Silvia Fiore
Summary: This study compared the effects of six different biochars on anaerobic digestion of mixed wastewater sludge, demonstrating that biochars with specific physical and chemical properties play a positive role in increasing methane production.
Article
Engineering, Environmental
Eskandar Poorasgari, Banu Ormeci
Summary: Experimental and computational approaches were used to model the kinetics of volatile solids destruction during wastewater sludge digestion, taking into account the effects of water evaporation. New kinetic models were developed to predict volatile solids concentrations in different conditions. The study found that water evaporation is an important factor to consider for accurate determination of kinetic rate constants and solids reduction.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Sergi Astals, Juan Jose Chavez-Fuentes, Gabriel Capson-Tojo, Miroslav Hutnan, Paul D. Jensen
Summary: Studies have shown that LCFA can alleviate the inhibition of ammoniacal nitrogen to a certain extent, possibly due to the formation of a protective layer by LCFA that limits the diffusion of free ammonia into the cell, or provides a localized lower pH around the microbial cell. However, the inhibition of ammoniacal nitrogen and LCFA also involve other inhibitors, and the specific mechanisms are not fully understood.
Article
Agricultural Engineering
Li-Jie Wu, Xiao-Xiao Li, Yu-Xiang Liu, Fan Yang, Quan Zhou, Rui-Peng Ren, Yong-Kang Lyu
Summary: The study optimized hydrothermal pretreatment conditions for continuous mesophilic and thermophilic anaerobic digestion, finding that hydrothermal pretreatment significantly increased methane production and volatile solids reduction in both systems.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Jiri Rusin, Katerina Chamradova, Panagiotis Basinas
Summary: Anaerobic digestion of food waste at low temperature can efficiently produce biomethane. The two-stage low-temperature reactor is more energy-efficient and operates stably compared to mesophilic reactors.
Article
Environmental Sciences
Rongzhan Liu, Ke Zhang, Xiangyu Chen, Benyi Xiao
Summary: This study investigates the effect of substrate organic composition on the anaerobic co-digestion of food waste and paper waste mixtures. The results show that the organic composition of the substrate has a greater impact on mesophilic co-digestion than thermophilic co-digestion. When the organic composition is carbohydrates:proteins:lipids = 6.8:1.8:1, the two co-digestion processes have similar biogas and methane production. However, when the organic composition is carbohydrates:proteins:lipids = 13.5:2:1, thermophilic co-digestion is more favorable. The characteristics of the thermophilic digestion process are more sensitive to changes in organic composition than the mesophilic digestion process.
Article
Biology
Ibrahim Mahmoud, Mokhles Hassan, Salama Mostafa Aboelenin, Mohamed Mohamed Soliman, Hossam Fouad Attia, Khaled A. Metwally, Heba M. Salem, Amira M. El-Tahan, Mohamed T. El-Saadony, Rafat Khalaphallah
Summary: This study aimed to evaluate the best combination of mixing ratios and the optimal mixing ratio between untreated primary sludge and raw chicken manure. The results showed that co-digestion could increase total biogas production volume, improve sludge treatment process, and produce eco-friendly sludge.
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
(2022)
Article
Biotechnology & Applied Microbiology
Marco Chiappero, Franco Berruti, Silvia Fiore
Summary: This study investigated the biomethane potential of wine lees through mesophilic batch tests and evaluated the influence of wood-based biochar addition. The results showed that wine lees are a highly attractive anaerobic digestion substrate, but careful operation is required.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Foteini Sakaveli, Maria Petala, Vasilios Tsiridis, Efthymios Darakas
Summary: The anaerobic digestion of primary sludge alone yielded higher methane production compared to the digestion of mixed primary and secondary sludge, and the addition of organic polyelectrolyte and attapulgite further increased methane production. Attapulgite improved the hydrolysis rate of biosolids and produced relatively stable digestate, although with lower dewaterability. This study suggests that single digestion of primary sludge can achieve higher methane production with lower digester volumes, increasing overall efficiency and productivity.
Article
Environmental Sciences
Xinzi Wang, Pan Wang, Xingyao Meng, Lianhai Ren
Summary: This study investigated the effect of biochar supported nano zero-valent iron (BC-nZVI) on anaerobic digestion performance of food waste (FW). The results showed that BC-nZVI could enhance methane production, reduce lag time, stimulate hydrolysis process, and improve system stability. Metagenomic analysis revealed that BC-nZVI contributed to strengthen methanogenesis through enriching the various predominant methanogenic pathways and activating most enzymes related to methane metabolism.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jinze Li, Walter Z. Tang, Li Gu
Summary: This study assessed and ranked the sustainability of main treatment technologies in 1215 wastewater treatment plants (WWTPs) in China using the unit energy consumption per kg pollutant removed (kWh/kgCOD(removed)) for the first time. The results showed that this metric better measures the sustainability of main treatment technologies in WWTPs compared to the unit energy consumption per cubic meter treated. Statistical analysis also revealed that the unit energy consumption decreases with increasing design flow rate, operation loading rate, and influent COD concentration.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Meng Gao, Siqi Li, Huijing Zou, Fushan Wen, Anrong Cai, Ruilin Zhu, Wenjing Tian, Dezhi Shi, Hongxiang Chai, Li Gu
Summary: Anaerobic digestion (AD) is a sustainable method for recovering energy from organic wastes, but the efficiency for waste activated sludge (WAS) is limited due to WAS hydrolysis constraints. This study proposes a strategy to treat WAS and landfill leachate simultaneously, aiming to enhance WAS hydrolysis and organic conversion to methane. The effects of landfill leachate on the different stages of AD of WAS were investigated, showing that appropriate amounts of leachate can promote solubilization, hydrolysis, and acidogenesis, but not methanogenesis. Mechanism studies revealed the beneficial effects of humic acid in leachate on hydrolysis and acidogenesis, and the dose-dependent effects of heavy metals on the AD process. Additionally, microbial community analysis showed an increase in microbes responsible for hydrolysis and acidogenesis with the presence of landfill leachate.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Agricultural Engineering
Xuekang Cao, Lei Jiang, Hao Zheng, Yong Liao, Qian Zhang, Qiushi Shen, Yuanxiang Mao, Fangying Ji, Dezhi Shi
Summary: By using zeolite and pyrite, tidal wetlands were constructed to achieve nitrification and denitrification simultaneously, addressing the issues of nitrogen removal limitations and large area requirements. The study found that zeolite regeneration and Fe(II) oxidation denitrification in tidal flow constructed wetlands effectively promoted ammonia and TN removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Xiaoyi Xu, Zhimin He, Hui Tang, Yidong Sun, Shuyuan Zhang, Dezhi Shi, Fangying Ji
Summary: In this study, furfuryl alcohol-derived mesoporous carbon (FMC) was successfully prepared and its adsorption kinetics for pharmaceuticals in synthetic urine were investigated. The results showed high adsorption capacities for diclofenac and oxytetracycline by FMC, with the adsorption process being significantly influenced by urine components and various factors affecting the adsorption of drugs.
Article
Environmental Sciences
Dezhi Shi, Mengying Lv, Haihang Tong, Jiayu Liu, Huayi Cai, Dan Luo, Cailing Ma, Xiaoyi Xu, Bin Wang
Summary: Magnetite and the two-step hydrothermal treatment were effective for degrading PAHs in MSWI FA, with 20 wt% magnetite being the optimal amount during two-step hydrothermal catalytic oxidation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Jinni Yao, Hainan Wang, Chengxue Ma, Yu Cao, Wanpeng Chen, Li Gu, Qiang He, Caihong Liu, Jiaming Xiong, Jun Ma, Xiaoliu Huangfu, Hongxia Liu
Summary: The study found that plastic particles have different effects on the transport of Tl(I) under different conditions, considering factors such as pH values and the competitive adsorption of nanoplastics in soil.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Meng Gao, Jiahui Yang, Siqi Li, Sinan Liu, Xiaofeng Xu, Feng Liu, Li Gu
Summary: This study explored a method to improve the anaerobic digestion of excess sludge and incineration leachate, revealing the potential mechanism of the AD process. The results showed that adding appropriate amounts of incineration leachate could enhance the efficiency of solubilization, hydrolysis, acidogenesis, and methanogenesis, leading to higher methane yields and improved digestive performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Naying Li, Zhiyong Han, Zhuojun Zeng, Nanfei Guo, Jin Wang, Dezhi Shi, Xiaoming Wang
Summary: The bacterial community structure in municipal solid waste (MSW) landfills is closely associated with secondary pollution control and stabilization. The spatial variations in the bacterial community are influenced by landfill type and environmental factors. Depth and organic matter content have the strongest correlations with the dominant bacteria, indicating their significant role in bacterial community succession.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2022)
Article
Chemistry, Applied
Haihang Tong, Dezhi Shi, Huayi Cai, Jiayu Liu, Mengying Lv, Li Gu, Ling Luo, Bin Wang
Summary: Novel hydrothermal methods assisted by hydroxyapatite were used to solidify heavy metals in fly ash, resulting in hydrothermally-treated products that meet landfilling standards. The solidification mechanism involved the formation of stable compounds between hydroxyapatite and heavy metal ions. The addition of hydroxyapatite seed crystal improved the solidification efficiency.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Environmental Sciences
Meng Gao, Jiahui Yang, Yang Liu, Junjie Zhang, Jianhao Li, Yongli Liu, Baocun Wu, Li Gu
Summary: This study investigated the co-digestion of concentrated landfill leachate and waste activated sludge using lab-scale reactors. The results showed that salinity levels had a significant impact on co-digestion performance, with higher salinity leading to decreased organic removal ratio and biogas and methane yields. Microbial community and diversity were also affected by salinity, with decreased microbial cell activity and damaged sludge floccule structure. The study provides important theoretical guidance for anaerobic digestion under salinity stresses.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biotechnology & Applied Microbiology
Muhammad Salam, Amina Shahzadi, Huaili Zheng, Fakhri Alam, Ghulam Nabi, Shi Dezhi, Waheed Ullah, Sumbal Ammara, Nisar Ali, Muhammad Bilal
Summary: The current waste treatment techniques in developing countries fail to meet the standards of appropriate waste management systems. The Black Soldier Fly (BSF) offers a potential and economical alternative for recycling biological waste due to its proven capabilities in waste degradation and biotransformation. This study investigated the interactions between municipal and organic waste using Black Soldier Fly Larvae (BSFL) as a growing medium, and revealed that BSFL can enhance the quality of the final product and promote the degradation of organic waste. Although BSFL cannot effectively directly degrade municipal solid waste, it can reduce it by efficiently degrading organic waste. The study also identified the optimal environmental conditions for BSFL breeding and growth, and inferred the most suitable cities for developing the BSFL waste treatment system in Pakistan.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Engineering, Environmental
Siqi Li, Yu Zhang, Weidong Duan, Rui Deng, Li Gu, Dezhi Shi
Summary: This study assessed the digestive performances of sludge after delamination of different EPS layers, finding that the removal of EPS layers can increase methane yield, decrease activation energy, disrupt interactions between metals and organic substances, and improve the conversion efficiency of organic substances.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Xiaofeng Xu, Qiuyun Xu, Zexuan Du, Li Gu, Cong Chen, Xiaoliu Huangfu, Dezhi Shi
Summary: SEM-EDS and sequential extraction methods were used to analyze the speciation, distribution, and spatial variation of phosphorus (P) in sludge. Inorganic P accounted for 91.3% of the total P, with Fe(III)-P representing the greatest percentage in the inorganic P fraction. Ascorbic acid (VC) performed well in releasing P from sludge, especially in acidic conditions. VC disrupted the sludge floc structure, releasing organic P via organic efflux.
Article
Engineering, Environmental
Tian Wenjing, Jiang Qin, Junyan Liu, Feng Liu, Li Gu
Summary: The effects of different types of biochar (PSBC and SSBC) on anaerobic digestion under different acidification conditions were studied. It was found that SSBC had more alkaline functional groups and higher conductivity, resulting in more significant impacts on the anaerobic digestion system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)
