Guangyin Zhen’s research while affiliated with East China Normal University and other places

... Biological methods: Biological processes employ microbial metabolism to transform nitrogen and phosphorus in the liquid phase into microbial biomass. Typically, the aqueous product is mixed with a culture medium containing specific microorganisms under suitable conditions, enabling them to absorb and incorporate N and P into their biomass [174][175][176][177]. While biological methods are environmentally friendly and cost-effective, they require longer processing times and the careful cultivation and management of microorganisms. ...

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Advances in Hydrothermal Carbonization for Biomass Wastewater Valorization: Optimizing Nitrogen and Phosphorus Nutrient Management to Enhance Agricultural and Ecological Outcomes

... The ATP activity and cyt c activity were measured using commercial test kits (Beijing Solarbio, Beijing, China). Furthermore, EPS was extracted using a modified oscillation-ultrasound combined cationic resin extraction method and analyzed for the components (polysaccharides, proteins, lipids, humic acids, and nucleic acids) by the standard substance method [25]. In addition, enzyme activities were measured using seed sludge as a control group to comparatively analyze the changes in cell viability after microplastic exposure. ...

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Electrochemically Coupled Anaerobic Membrane Bioreactor Facilitates Remediation of Microplastic-Containing Wastewater

... With enterprises' current emphasis on their operations' costeffectiveness and low-carbon emissions, biological treatment technologies are increasingly favored for their low-carbon footprint Abbreviations: HSOW, hypersaline organic wastewater; AOPs, advanced oxidation processes; ZLD, zero liquid discharge; ROS, reactive oxygen species; DIET, direct interspecies electron transfer; PAC, powdered activated carbon; CNTs, carbon nanotubes; BES, bioelectrochemical system; SA, sodium alginate; PVA, polyvinyl alcohol; EPSs, extracellular polymeric substances; EMBRs, electric field-coupled membrane bioreactors; SMF, static magnetic field; PHA, polyhydroxyalkanoate; COD, chemical oxygen demand; TDSs, total dissolved solids; TN, total nitrogen; IOMNPs, iron oxide magnetic nanoparticles; EMCI, embedding microbial cell immobilization; UV, ultraviolet; WWTPs, wastewater treatment plants; KPIs, key performance indicators; IoT, Internet of Things; UF, ultrafiltration; RO, reverse osmosis. and minimal amounts of secondary pollution compared to those of alternatives [13,14]. However, the high salinity and toxicity of pharmaceutical and chemical wastewater can severely inhibit microbial activity [15]. ...

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Hypersaline organic wastewater treatment: Biotechnological advances and engineering challenges

... Our results revealed that in addition to abiotic factors, biotic factors-particularly the diversity of the bacterial communityexert an extremely significant and strong influence on the complexity of its network. This implies that the presence or absence of specific bacterial community members not only affects their interactions but also plays a pivotal role in the formation of the entire network Yu et al., 2024). Although the diversity of fungal communities exhibited significant differences across tree ages, there was no notable effect on the complexity of their networks. ...

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Temporal dynamics of soil microbial symbioses in the root zone of wolfberry: deciphering the effects of biotic and abiotic factors on bacterial and fungal ecological networks

... Microbes can utilize various electron donors (energy-provided OM) and acceptors (i.e., As(V) and Fe(III)) for metabolism, enhancing their survival in anoxic environments (Liu et al., 2024;Lu et al., 2021). The surface properties of microbes, such as charge properties and hydrophobicity of cell membranes, can affect their interactions with electron acceptors, improving electron transfer efficiency (Cai et al., 2024). The formation of biofilms also enhances electron transfer efficiency, allowing them to effectively participate in the electron shuttling process (Dhar et al., 2017). ...

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In Situ Reduction of Fe(III) (Hydr)oxides‐Bound As(V) via Electron Shuttling in the Presence of Organic Matter

... Many investigations on DF by anaerobic fermentative bacteria, such as Escherichia coli [36][37][38], Clostridium [39][40][41][42][43][44][45], and Enterobacter [46][47][48][49], have been conducted. Numerous authors have documented H2 production from mixed microflora derived from various sources, including heat-treated anaerobic sludge [50][51][52] and cow dung [53][54][55][56][57], has been documented by numerous authors. Several elements, such as the kind of organism, the metabolic pathway taken, the type of substrate utilized, and the final products generated, influence how much H 2 is produced during DF. ...

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Review of over two decades of research on dark and photo fermentation for biohydrogen production – A combination of traditional, systematic, and bibliometric approaches

... The drivers of HA production in composting are therefore of interest to the industry [16,21,22]. As straw is a lignocellulosic material that is difficult to chemically degrade, many pre-treatments are required to modify the structure of the plant cell walls to enable microbial utilization of the material [13,18]. ...

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A Physicochemical and Biological Composite Environment for the Humification of Crop Straw in Compost

... The substrate characteristics, such as the moisture content, pH, chemical composition and particle size, also affect biomethane production through methanogenesis [8,9]. A wide range of microbial communities are responsible for the methanogenesis process during anaerobic treatment [10], including fermentative and syntrophic acetogenic bacteria and methanogenic archaea [11]. These microorganisms contribute to the degradation of complex molecules into simpler compounds during the fermentative, acidogenic, acetogenic, and methanogenic stages [12,13]. ...

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Biomethane recovery performance and microbial community dynamics of a high-biomass submerged AnMBR (HBSAnMBR) treating abattoir wastewater

... High removal efficiencies of COD were consistently achieved in both AnMBR-MEC and AnMBR systems (> 90%) even with long operation periods, and in most cases the electrochemical-AnMBR outperformed the conventional system reaching removal rates with COD > 95% [36][37][38]44,52,62,66]. Even in pilot-scale studies with high-strength pesticides wastewater influents, AnMBR-MEC maintained stable average COD removal rates ranging from over 70% to around 81% [42,43]. ...

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Synergistic Approach for Enhanced Wastewater Treatment: Harnessing the Potential of Bioelectrochemical Systems in integration with Anaerobic Membrane Bioreactors

... hydrolysis, electron transfer, and electromethanogenesis(Zhao et al. 2021;Zhen et al. 2023).Shorter HRTs may be favorable for electrochemical enhancement with AnEMBRs more owing to a higher organic loading rate. CH4 production in AnEMBRs can occur primarily through hydrogenotrophic methanogenesis because the detection of acetoclastic methanogens in solution or on the electrode is limited). ...

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Anaerobic electrochemical membrane bioreactors: A panoramic tool for wastewater treatment and resource recovery