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
Xuran Liu, Qizi Fu, Zongyao Liu, Tianjing Zeng, Mingting Du, Dandan He, Qi Lu, Bing-Jie Ni, Dongbo Wang
Summary: Alkaline pre-fermentation was proposed as a method to enhance both methane production and PAM degradation of PAM-flocculated sewage sludge, improving the efficiency of anaerobic digestion. Microbial community analysis showed enrichment of syntrophic bacteria in the alkaline pre-fermenter and elevated levels of acetotrophic methanogen in the anaerobic digester, contributing to the success of this microbial based strategy.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Xuran Liu, Qian Deng, Mingting Du, Qi Lu, Wenneng Zhou, Dongbo Wang
Summary: The presence of PVC microplastics at environmentally relevant levels does not affect methane production but reduces the toxicity of cadmium. When the concentration of PVC microplastics reaches 30 particles/g TS, methane production recovers to 89.7% in the presence of 5 mg Cd/g TS compared to the control. The adsorption of Cd by PVC microplastics is higher than that of sludge-substrate, reducing the bioavailability of Cd during anaerobic digestion.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Zhiren Cao, Xiaoding Huang, You Wu, Dongbo Wang, Wenjie Du, Jiamin Zhang, Qi Yang, Zhe Kuang, Zhuo Chen, Xiaoming Li
Summary: This study investigated the effect of AHTN on waste activated sludge anaerobic digestion, finding that AHTN can enhance methane production up to a certain concentration, but decrease it when reaching a certain threshold. Additionally, AHTN can facilitate the utilization of volatile fatty acids, with a degradation efficiency of 42.7%. Mechanism investigation showed that AHTN can promote solubilization, fermentation, and methanogenesis processes, leading to increased methane production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Hongbo Chen, Mengge Tang, Xiao Yang, Yiu Fai Tsang, Yanxin Wu, Dongbo Wang, Yaoyu Zhou
Summary: The study identifies the key role of Polyamide 6 (PA6) microplastics in enhancing methane production during anaerobic digestion, with a significant increase in methane production due to the presence of caprolactam (CPL). PA6 has a less toxic effect compared to other microplastics on waste activated sludge (WAS) anaerobic digestion, and it promotes key enzyme activities leading to increased methane production potential and volatile solids destruction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Qiuxiang Xu, Tian-Yi Luo, Ruo-Lan Wu, Wei Wei, Jing Sun, Xiaohu Dai, Bing-Jie Ni
Summary: The study demonstrates that rhamnolipid (RL) pretreatment has a promoting effect on methane production in two-phase anaerobic digestion of waste activated sludge, although methane production may be inhibited in the presence of RL during the acidogenic phase. Further analysis shows that the addition of RL can increase methane production throughout the entire two-phase anaerobic digestion process.
Article
Green & Sustainable Science & Technology
Yuqi Wu, Kang Song
Summary: The study on anaerobic co-digestion of waste activated sludge and fish waste showed that adding 1.5% and 3% of fish waste could enhance methane production, while adding more than 6% inhibited methane production severely. Microbial community analysis revealed dominance of hydrogenotrophic and methylotrophic methanogenesis pathways during anaerobic co-digestion.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Wai Lin Cheong, Yi Jing Chan, Timm Joyce Tiong, Woon Chan Chong, Worapon Kiatkittipong, Kunlanan Kiatkittipong, Mardawani Mohamad, Hanita Daud, I. Wayan Koko Suryawan, Mega Mutiara Sari, Jun Wei Lim
Summary: The aim of this study was to develop a simulation model of anaerobic co-digestion of food waste and sewage sludge for biogas production. The results showed the optimal parameters for methane yield, COD removal efficiency, and VS removal efficiency. Economic analysis indicated that the study is feasible and economically viable.
Article
Engineering, Environmental
Haoyu Liu, Ying Xu, Hui Geng, Yongdong Chen, Xiaohu Dai
Summary: This study investigates the effect of MOF-808 on the hydrolysis and syntrophic methanogenesis of waste activated sludge (WAS) during anaerobic digestion (AD). The results show that MOF-808 enhances methane production and the proportion of methane in biogas, as well as improves the enzymatic hydrolysis of sludge and the abiotic hydrolysis of sludge extracellular organic substances. MOF-808 also accelerates the bioconversion of volatile fatty acids (VFAs) to methane, and enriches hydrogen-producing bacteria and mixotrophic methanogens in the microbial community structure of the sludge samples.
Article
Chemistry, Physical
Ikirsha Jokhio, Sundus Saeed Qureshi, Abdul Razzaq Sahito, Mehr-un-Nisa Qureshi, Imtiaz Ahmed Lashari, N. M. Mubarak, Manoj Tripathi, Amal M. Al-Mohaimeed, Mohamed S. Elshikh
Summary: The yield of bio-methane and bio-hydrogen was enhanced by co-digesting banana plant waste (BPW) and sewage sludge (SS). Acclimatisation of the inoculum SS was performed in a continuous stirred tank reactor (CSTR), and its various parameters were analyzed daily. Six different BPW to SS ratios were optimized and incubated in a manual methane potential test setup (MMPTS) for 40 days, with R4 (60% BPW and 40% SS) showing the highest yields. Furthermore, the best achieved ratio of BPW and SS was treated with different doses of NaOH as an alkaline pre-treatment, and the highest bio-methane yield was observed with dose 2 (0.75 mol NaOH) at 620.8 NmL/day. The study demonstrates the promising potential of co-digestion of BPW and SS for enhanced bio-methane and bio-hydrogen production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Huan Liu, Xuan Li, Zehao Zhang, Long D. Nghiem, Qilin Wang
Summary: Urine pretreatment is an effective strategy to improve methane production in anaerobic digestion of waste activated sludge, with significant increases in methane production, degradation extent, and hydrolysis rate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Yufen Wang, Kaixin Zheng, Haixiao Guo, Yindong Tong, Tingting Zhu, Yiwen Liu
Summary: This study revealed that vivianite significantly inhibits anaerobic digestion of waste activated sludge, leading to a decrease in methane yield, an increase in substrate remaining, and an impact on microbial communities.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Shu-Lin Wu, Wei Wei, Bing-Jie Ni
Summary: A novel sludge pretreatment technology using calcium hypochlorite (Ca(ClO)2) to enhance methane production from waste activated sludge (WAS) anaerobic digestion was reported. The results showed that appropriate doses of Ca(ClO)2 significantly increased the solubilization of WAS and methane production, while negatively affecting the microbial community composition and inhibiting microbial processes related to methane production.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Agricultural Engineering
Yu Qin, Jingnan Yang, Yanxin Wu, Dongbo Wang, Xuran Liu, Mingting Du, Dandan He, Neng Yi
Summary: This study found that allyl isothiocyanate (AITC) from cruciferous vegetables can be completely degraded by microorganisms during anaerobic co-digestion, serving as a substrate for methane production. Increasing AITC concentration led to decreased methane production and prolonged digestion time. AITC also induced cell apoptosis by modifying cell membrane properties, inhibiting the anaerobic co-digestion process.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Xinru Jiang, Yandong Xie, Minggang Liu, Shiyu Bin, Yang Liu, Chenchen Huan, Gaosheng Ji, Xinhui Wang, Zhiying Yan, Qingyang Lyu
Summary: This study demonstrates that anaerobic co-digestion system can improve biodegradability to produce more VFAs and biogas, relieve ammonia nitrogen inhibition, enhance hydrolytic acidification and methanogenesis compared to mono sludge digester.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Steef de Valk, Cuijie Feng, Ahmad F. Khadem, Jules B. van Lier, Merle K. de Kreuk
ENVIRONMENTAL TECHNOLOGY
(2019)
Article
Engineering, Environmental
Peng Wei, Robert F. Mudde, Wim Uijttewaal, Henri Spanjers, Jules B. van Lier, Merle de Kreuk
Article
Engineering, Environmental
Hongxiao Guo, Jules B. van Lier, Merle de Kreuk
Article
Engineering, Environmental
G. Kooijman, M. K. de Kreuk, C. Houtman, J. B. van Lier
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Lenno van den Berg, Catherine M. Kirkland, Joseph D. Seymour, Sarah L. Codd, Mark C. M. van Loosdrecht, Merle K. de Kreuk
BIOTECHNOLOGY AND BIOENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Lenno van den Berg, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study investigated the impact of different methods on the measurement of diffusion coefficients in biofilm processes. A Monte Carlo simulation was used to assess the precision of each method, revealing a wide range of variability. The results suggest that existing experimental methods may lead to inaccurate determination of diffusion coefficients.
BIOTECHNOLOGY AND BIOENGINEERING
(2021)
Article
Energy & Fuels
Adrian Gonzalez, Hongxiao Guo, Oscar Ortega-Ibanez, Coert Petri, Jules B. van Lier, Merle de Kreuk, Alexander Hendriks
Article
Environmental Sciences
Lenno van den Berg, Mario Pronk, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study compared four methods to measure the density of granular sludge in a full-scale plant treating domestic sewage, and assessed the effect of salinity on granule density. Most methods yielded reliable results, as long as the effect of salinity was considered.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Adrian Gonzalez, Jules B. van Lier, Merle K. de Kreuk
Summary: The study highlights that the characteristics of waste activated sludge are influenced by the wastewater or growth media, leading to different degrees of recalcitrance in the produced sludge. By adjusting the growth medium, it is possible to obtain lab-grown sludge with a similar response to thermal pre-treatment, showing slowly-biodegradable properties.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Adrian Gonzalez, Jules B. van Lier, Merle K. de Kreuk
Summary: Mild pre-treatment techniques, such as temperatures < 100 degrees C combined with the addition of H2O2, can enhance methane production from waste activated sludge by improving mass transfer.
Article
Environmental Sciences
Javier A. Pavez-Jara, Jules B. van Lier, Merle K. de Kreuk
Summary: Full-scale thermal hydrolysis processes (THP) can negatively impact methanogenesis during anaerobic digestion (AD). This research investigates the distribution and degradation of nutrients and melanoidins in THP-sludge during AD. The results show that THP-formed soluble melanoidins have partial biodegradability, especially those with a molecular weight below 1.1 kDa. TAN concentration increased after AD, and the presence of TAN and associated FAN strongly inhibited methanogenesis.
Article
Engineering, Environmental
Antonella Piaggio, Srilekha Mittapalli, David Calderon-Franco, David Weissbrodt, Jules van Lier, Merle de Kreuk, Ralph Lindeboom
Summary: This study investigates the effects of adding antibiotics to a micro-aerated anaerobic membrane bioreactor (MA-AnMBR). The results show that antibiotics have no effect on wastewater treatment efficiency, but they do affect the pH value and biogas composition of the process. In addition, the addition of antibiotics increases the relative abundance of antibiotic-resistant genes and mobile genetic elements in the system.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Lenno van den Berg, Sara Toja Ortega, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study investigated the diffusion of different molecular weight substrates within aerobic granular sludge, and found that the diffusion coefficients within the granules were not significantly different from those in water for substrates with molecular weights up to 4000 Da. The structure of the granules was characterized as having large macropores and semi-solid regions, with different degrees of obstruction to diffusion. Furthermore, the majority of the influent soluble COD was found to be lighter than 1 kDa, indicating that it can be considered as diffusible COD.
Review
Biotechnology & Applied Microbiology
Zhi-Min Zhao, Zhi-Hua Liu, Tongtong Zhang, Rongqian Meng, Zhiqun Gong, Yibing Li, Jing Hu, Arthur J. Ragauskas, Bing-Zhi Li, Ying-Jin Yuan
Summary: Bioconversion of bioresources/wastes using Rhodococcus is a promising approach for producing lipid-derived bioproducts. However, bioconversion involves living cells and is a complex system that requires further understanding. This review highlights the potential of Rhodococcus for producing lipids from various wastes and presents genetic modifications using emerging tools for promoting bioconversion. Additionally, strategies for enhancing the bioaccessibility of lignin and its derived aromatics and synthesizing biodiesel and aviation fuels from lignin and lipids are discussed. The synergistic modification of microbial strains, substrates, and fermentation processes is proposed for sustainable biological lignin valorization.
BIOTECHNOLOGY ADVANCES
(2024)
Review
Biotechnology & Applied Microbiology
Maddy L. Newby, Joel D. Allen, Max Crispin
Summary: A key aspect of successful viral vaccine design is the elicitation of neutralizing antibodies targeting viral attachment and fusion glycoproteins. Glycosylation can influence the antigenicity and immunogenicity of vaccines, with native-like glycosylation potentially enhancing immunogenicity. Understanding viral glycosylation can guide the development of future vaccines in various enveloped viruses.
BIOTECHNOLOGY ADVANCES
(2024)
Review
Biotechnology & Applied Microbiology
Uganeeswary Suparmaniam, Man Kee Lam, Jun Wei Lim, Inn Shi Tan, Bridgid Lai Fui Chin, Siew Hoong Shuit, Steven Lim, Yean Ling Pang, Peck Loo Kiew
Summary: Microalgae have the ability to synthesize high-value phytochemicals, and subjecting them to abiotic stress can enhance the accumulation of valuable metabolites within their cells. This study explores the effects of manipulating abiotic stress on microalgae yields and discusses approaches to increase HVPCs production using abiotic stress.
BIOTECHNOLOGY ADVANCES
(2024)
Review
Biotechnology & Applied Microbiology
Pei Zhou, Cong Gao, Wei Song, Wanqing Wei, Jing Wu, Liming Liu, Xiulai Chen
Summary: The engineering status of protein is crucial for the efficient bioproduction in microbial cell factories. Strategies such as protein engineering, protein modification, and protein assembly can effectively modify the protein status and enhance production efficiency.
BIOTECHNOLOGY ADVANCES
(2024)