Coupled process of in-situ sludge fermentation and riboflavin-mediated nitrogen removal for low carbon wastewater treatment

Article Agricultural Engineering

Realization of partial nitrification and in-situ anammox in continuous-flow anaerobic/aerobic/anoxic process with side-stream sludge fermentation for real sewage

Qiang He et al.

Summary: The use of sludge alkaline fermentation promoted nitrogen removal and enrichment of anammox bacteria in wastewater with low carbon-to-nitrogen (C/N) ratio. This system saves energy and reduces consumption significantly.

BIORESOURCE TECHNOLOGY (2022)

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Article Agricultural Engineering

In-situ fermentation coupling with partial-denitrification/anammox process for enhanced nitrogen removal in an integrated three-stage anoxic/oxic (A/ O) biofilm reactor treating low COD/N real wastewater

Wenlong Liu et al.

Summary: The study successfully implemented the PD-anammox process coupled with in-situ fermentation to treat real wastewater, achieving enhanced TN removal efficiency and low effluent TN and ammonium concentrations. The research demonstrates that partial denitrification is the main nitrite provider for anammox, while in-situ fermentation can decompose complex organics for biological treatment.

BIORESOURCE TECHNOLOGY (2022)

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Review Environmental Sciences

Simultaneous biological removal of nitrogen and phosphorus from secondary effluent of wastewater treatment plants by advanced treatment: A review

Qi Zhou et al.

Summary: This review summarizes the key to improving the water quality of wastewater treatment plants (WWTPs) - simultaneous removal of nitrogen and phosphorus. The composition of secondary effluent from municipal WWTPs is introduced, and three main treatment processes for simultaneous nitrogen and phosphorus removal are summarized. Their performances, mechanisms, influencing factors, and microbial community structures are analyzed. The advanced removal of nitrogen and phosphorus by different technologies is compared and summarized. The challenges and future prospects of simultaneous removal of nitrogen and phosphorus technologies for secondary effluent are proposed.

CHEMOSPHERE (2022)

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Article Engineering, Environmental

An Innovative Process for Mature Landfill Leachate and Waste Activated Sludge Simultaneous Treatment Based on Partial Nitrification, In Situ Fermentation, and Anammox (PNFA)

Fangzhai Zhang et al.

Summary: The PNFA system achieved efficient nitrogen removal in treating landfill leachate and waste activated sludge, reducing the need for external carbon sources and energy consumption while also decreasing CO2 emissions.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2022)

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Article Environmental Sciences

Analysis on common problems of the wastewater treatment industry in urban China

Jingbing Zhang et al.

Summary: The wastewater treatment industry in urban China faces common problems such as insufficient drainage network length and low water quality ratio. There is also a gap in construction of wastewater treatment facilities compared to developed countries. This study investigates the common problems that hinder the operation efficiency of wastewater treatment plants and proposes three countermeasures, including refinement design, optimization facilities, and reasonable process control.

CHEMOSPHERE (2022)

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Article Engineering, Environmental

Partial denitrification-anammox (PdNA) application in mainstream IFAS configuration using raw fermentate as carbon source

Mojolaoluwa Ladipo-Obasa et al.

Summary: This study examines the feasibility of using raw fermentate for mainstream partial denitrification-anammox (PdNA) in an integrated fixed-film activated sludge (IFAS) process. The research finds that PdNA selection can be achieved even with low-quality fermentate and identifies nitrate residual as a key factor in PdNA efficiency. The study also highlights the potential for significant savings in methanol and reduced carbon footprint by integrating PdNA upstream from polishing aeration and anoxic zones.

WATER ENVIRONMENT RESEARCH (2022)

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Article Environmental Sciences

Principles and potential of thermal hydrolysis of sewage sludge to enhance anaerobic digestion

Pallavi Gahlot et al.

Summary: This study aims to explore the potential of thermal hydrolysis to enhance anaerobic digestion of sewage sludge. Thermal pretreatment can improve the biodegradability of sludge, recover energy and nutrients, and is cost-effective. Additionally, other sludge pretreatment methods and challenges are discussed.

ENVIRONMENTAL RESEARCH (2022)

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Article Environmental Sciences

Application of humin-immobilized biocathode in a continuous-flow bioelectrochemical system for nitrate removal at low temperature

Dan Chen et al.

Summary: Solid-phase humic substances were immobilized on a biocathode to support denitrification at low temperatures, showing stable denitrification capacity and higher microbial denitrification rates. Humin was found to be a stable redox mediator, suggesting its potential as a useful strategy for electrostimulated denitrification in groundwater.

ENVIRONMENTAL RESEARCH (2021)

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Review Engineering, Environmental

Anaerobic fermentation of waste activated sludge for volatile fatty acid production: Recent updates of pretreatment methods and the potential effect of humic and nutrients substances

Ting Liang et al.

Summary: This study provides an overview of the recent advancements in volatile fatty acids production from waste activated sludge. Factors affecting VFAs production including sludge properties, metabolic pathways, and pretreatment methods were evaluated. It was found that additives and pretreatment are energetically preferred for accelerating VFAs accumulation, while different structures of humic substances may have varying effects on the fermentation process and VFAs production.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2021)

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Article Green & Sustainable Science & Technology

Response of VFAs and microbial interspecific interaction to primary sludge fermentation temperature

Xiao Huang et al.

Summary: This study found that temperature plays a crucial role in the succession and interspecific interaction of microorganisms in primary sludge anaerobic fermentation system, affecting the production of volatile fatty acids (VFAs). Higher temperatures promote the production of acetic and iso-valeric acid, and there are metabolic differences among microorganisms at different temperatures.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Engineering, Environmental

Application of different redox mediators induced bio-promoters to accelerate the recovery of denitrification and denitrifying functional microorganisms inhibited by transient Cr(VI) shock

Qian Wang et al.

Summary: This study developed four nontoxic bio-promoters to quickly restore the denitrification performance after high-loading Cr(VI) suppressing. Redox mediators induced bio-promoters showed noticeable superiority in releasing bio-inhibition and effectively recovering the abundance of denitrifying microorganisms.

JOURNAL OF HAZARDOUS MATERIALS (2021)

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Article Agricultural Engineering

A novel strategy for enhancing the partial denitrification to treat domestic wastewater by feeding sludge fermentation liquid

Xuefan Liu et al.

Summary: The study found that using sludge fermentation liquid for partial denitrification in treating domestic wastewater is feasible and can enhance NO2?-N concentration and nitrate-to-nitrite transformation. High-throughput sequencing analysis showed that the increases of Thauera, Paracoccus and Enterobacteriaceae contribute to the enhancement of partial denitrification.

BIORESOURCE TECHNOLOGY (2021)

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Article Engineering, Environmental

Study on nitrogen removal mechanism of the micro-pressure double-cycle reactor

Shengshu Ai et al.

Summary: The study emphasized the excellent denitrification performance of the Micro-pressure double-cycle reactor in treating municipal wastewater. By analyzing the structure and microbial activity, it was found that the reactor provides a macroscopic biochemical reaction environment for simultaneous nitrification and denitrification.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2021)

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Article Environmental Sciences

Biological nutrient removal enhancement using fermented primary and rotating belt filter biosolids

Gholamreza Bahreini et al.

Summary: This research compared the impact of primary clarification and rotating belt filtration on biological nutrients removal processes, finding that SFL can effectively enhance BNR. The study also showed that the addition of SFL significantly increased the removal efficiency of reactors, with stable nutrient concentrations of nitrogen and phosphorus in the effluent.

SCIENCE OF THE TOTAL ENVIRONMENT (2021)

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Article Biotechnology & Applied Microbiology

Differences of bacterial communities in two full-scale A2/O municipal wastewater treatment plants and their effects on effluent total nitrogen removal

Jinhao Xiang et al.

Summary: The study found that the bacterial community diversity was higher and the functional bacterial genera were more abundant in X plant compared to D plant, resulting in lower effluent total nitrogen concentrations.

ENVIRONMENTAL TECHNOLOGY & INNOVATION (2021)

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Review Microbiology

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

Wenning Mai et al.

Summary: Excessive discharge of nitrogenous pollutants can lead to ecological problems, and biological treatment is an effective way to remove nitrogen pollution. Various efficient methods for nitrogen removal exist, with microorganisms playing key roles in these processes, although information about them is limited.

FRONTIERS IN MICROBIOLOGY (2021)

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Article Agricultural Engineering

Denitrification potential of sodium alginate gel beads immobilized iron-carbon, Zoogloea sp. L2, and riboflavin: Performance optimization and mechanism

Liang Xu et al.

Summary: A gel bead loaded with iron-carbon powder, Zoogloea sp. L2, and riboflavin was prepared through cross-linking of sodium alginate to establish an immobilized bioreactor. Addition of riboflavin as a redox mediator promoted denitrification, achieving high nitrate removal efficiency under optimal conditions. Analysis techniques such as FTIR, EEM, XRD, and GC showed excellent immobilization and denitrification of the bioreactor, with Zoogloea playing a crucial role in nitrate removal.

BIORESOURCE TECHNOLOGY (2021)

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Article Biotechnology & Applied Microbiology

Extracellular riboflavin induces anaerobic biofilm formation in Shewanella oneidensis

Miriam Edel et al.

Summary: This study identified a new quorum-sensing mechanism in S. oneidensis, where riboflavin production and excretion trigger biofilm formation by upregulating proteins involved in the process. The findings could be utilized for developing strains that generate higher current densities in bioelectrochemical systems.

BIOTECHNOLOGY FOR BIOFUELS (2021)

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Article Engineering, Environmental

Development of a novel partial nitrification, fermentation-based double denitrification bioprocess (PN-F-Double/DN) to simultaneous treatment of mature landfill leachate and waste activated sludge

Fangzhai Zhang et al.

Summary: A novel fermentation-based double denitrification bioprocess successfully combined fermentation and denitrification, treating high ammonia wastewater efficiently with nitrogen removal and sludge reduction.

WATER RESEARCH (2021)

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Article Microbiology

Enrichment of Autotrophic Denitrifiers From Anaerobic Sludge Using Sulfurous Electron Donors

M. F. Carboni et al.

Summary: This study compared the rates and microbial community development in batch bioassays using different electron donors for autotrophic denitrification. Thiosulfate showed the highest denitrification rates, while elemental sulfur was determined to be the most suitable electron donor.

FRONTIERS IN MICROBIOLOGY (2021)

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Article Materials Science, Paper & Wood

Riboflavin Enhanced Denitrification of Artificial Wastewater under Low C/N Condition in Cold Season

Jingya Liu et al.

Summary: The study utilized riboflavin as an eco-friendly electron mediator to enhance denitrification process in an SBR reactor under low temperature and limited carbon source conditions. Riboflavin improved pH levels in the system for denitrification and increased the utilization efficiency of limited carbon source, driving the denitrification process.

BIORESOURCES (2021)

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Article Engineering, Environmental

Synergistic Partial-Denitrification, Anammox, and in-situ Fermentation (SPDAF) Process for Advanced Nitrogen Removal from Domestic and Nitrate-Containing Wastewater

Jiantao Ji et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2020)

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Article Engineering, Environmental

A novel partial nitrification-synchronous anammox and endogenous partial denitrification (PN-SAEPD) process for advanced nitrogen removal from municipal wastewater at ambient temperatures

Jiantao Ji et al.

WATER RESEARCH (2020)

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Article Multidisciplinary Sciences

Extracellular electron transfer-dependent anaerobic oxidation of ammonium by anammox bacteria

Dario R. Shaw et al.

NATURE COMMUNICATIONS (2020)

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Article Agricultural Engineering

Effect and ameliorative mechanisms of polyoxometalates on the denitrification under sulfonamide antibiotics stress

Haixiao Guo et al.

BIORESOURCE TECHNOLOGY (2020)

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Review Agricultural Engineering

Short-chain fatty acids recovery from sewage sludge via acidogenic fermentation as a carbon source for denitrification: A review

Wen Liu et al.

BIORESOURCE TECHNOLOGY (2020)

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Article Environmental Sciences

Primary sludge as solid carbon source for biological denitrification: System optimization at micro-level

Shenbin Cao et al.

ENVIRONMENTAL RESEARCH (2020)

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Article Materials Science, Paper & Wood

Riboflavin Boosts Fermentative Valeric Acid Generation from Waste Activated Sludge

Binfang Shi et al.

BIORESOURCES (2020)

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Review Environmental Sciences

The roles of free ammonia (FA) in biological wastewater treatment processes: A review

Yiwen Liu et al.

ENVIRONMENT INTERNATIONAL (2019)

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Article Engineering, Environmental

Alteration of denitrifying microbial communities by redox mediators available at low temperature

Hongying Yuan et al.

WATER SCIENCE AND TECHNOLOGY (2019)

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Article Environmental Sciences

Insights into redox mediator supplementation on enhanced volatile fatty acids production from waste activated sludge

Jingang Huang et al.

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2019)

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Review Engineering, Environmental

Municipal wastewater treatment in China: Development history and future perspectives

Jiuhui Qu et al.

FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING (2019)

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Article Agricultural Engineering

Improving anaerobic fermentation of waste activated sludge using iron activated persulfate treatment

Jingyang Luo et al.

BIORESOURCE TECHNOLOGY (2018)

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Article Agricultural Engineering

Full-scale production of VFAs from sewage sludge by anaerobic alkaline fermentation to improve biological nutrients removal in domestic wastewater

He Liu et al.

BIORESOURCE TECHNOLOGY (2018)

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Review Biotechnology & Applied Microbiology

Application of redox mediators in bioelectrochemical systems

Claudia M. Martinez et al.

BIOTECHNOLOGY ADVANCES (2018)

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Article Engineering, Environmental

Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification in wastewater treatment: Comparison of sludge types

Lin Lin et al.

FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING (2018)

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Article Engineering, Environmental

Application of microwave energy in the destruction of dioxins in the froth product after flotation of hospital solid waste incinerator fly ash

Guo-xia Wei et al.

JOURNAL OF HAZARDOUS MATERIALS (2017)

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Article Agricultural Engineering

Enhanced nitrogen and phosphorus removal from municipal wastewater in an anaerobic-aerobic-anoxic sequencing batch reactor with sludge fermentation products as carbon source

Jinjin Liu et al.

BIORESOURCE TECHNOLOGY (2017)

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Article Agricultural Engineering

Denitrification using excess activated sludge as carbon source: Performance and the microbial community dynamics

Haohao Sun et al.

BIORESOURCE TECHNOLOGY (2017)

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Article Agricultural Engineering

The use of fermentation liquid of wastewater primary sedimentation sludge as supplemental carbon source for denitrification based on enhanced anaerobic fermentation

Feng Liu et al.

BIORESOURCE TECHNOLOGY (2016)

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Article Biotechnology & Applied Microbiology

The denitrification characteristics of novel functional biocarriers immobilised by non-dissolved redox mediators

Qing Xu et al.

BIOCHEMICAL ENGINEERING JOURNAL (2015)

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Article Environmental Sciences

Biological nutrient removal with low nitrous oxide generation by cancelling the anaerobic phase and extending the idle phase in a sequencing batch reactor

Yinguang Chen et al.

CHEMOSPHERE (2014)

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Article Environmental Sciences

Biological nutrient removal in a sequencing batch reactor operated as oxic/anoxic/extended-idle regime

Xiao-ming Li et al.

CHEMOSPHERE (2014)

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Article Biotechnology & Applied Microbiology

Inducing mechanism of biological phosphorus removal driven by the aerobic/extended-idle regime

Dongbo Wang et al.

BIOTECHNOLOGY AND BIOENGINEERING (2012)

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Article Engineering, Environmental

Pilot-Scale Waste Activated Sludge Alkaline Fermentation, Fermentation Liquid Separation, and Application of Fermentation Liquid To Improve Biological Nutrient Removal

Xiang Li et al.

ENVIRONMENTAL SCIENCE & TECHNOLOGY (2011)

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Article Engineering, Environmental

Nutrients removal in hybrid fluidised bed bioreactors operated with aeration cycles

M. A. Martin Martin et al.

WATER SCIENCE AND TECHNOLOGY (2007)

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Coupled process of in-situ sludge fermentation and riboflavin-mediated nitrogen removal for low carbon wastewater treatment

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