Sludge reduction and microbial structures of aerobic, micro-aerobic and anaerobic side-stream reactor coupled membrane bioreactors

Pang, Hongjian; Zhou, Zhen; Niu, Tianhao; Jiang, Lu-Man; Chen, Guang; Xu, Biao; Jiang, Lingyan; Qu, Zhan

doi:10.1016/j.biortech.2018.07.097

Cited by 39 publications

(14 citation statements)

References 35 publications

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“…However, the average flux was 66.4, 25.1, and 3.5 L m −2 h, respectively, implying that the 25-μm filter had significantly lower filtration resistance. Pang et al (2018) investigated the impacts of dissolved oxygen (DO) level in side-stream reactors (SSR) on sludge reduction and microbial community structure. They studied an anoxic/oxic MBR along with three SSR coupled MBR in parallel.…”

Section: Mbrmentioning

confidence: 99%

Membrane processes

Arabi¹,

Pellegrin

Aguinaldo

et al. 2020

Water Environment Research

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This literature review provides a review for publications in 2018 and 2019 and includes information membrane processes findings for municipal and industrial applications. This review is a subsection of the annual Water Environment Federation literature review for Treatment Systems section. The following topics are covered in this literature review: industrial wastewater and membrane. Bioreactor (MBR) configuration, membrane fouling, design, reuse, nutrient removal, operation, anaerobic membrane systems, microconstituents removal, membrane technology advances, and modeling. Other subsections of the Treatment Systems section that might relate to this literature review include the following: Biological Fixed-Film Systems, Activated Sludge, and Other Aerobic Suspended Culture Processes, Anaerobic Processes, and Water Reclamation and Reuse. This publication might also have related information on membrane processes: Industrial Wastes, Hazardous Wastes, and Fate and Effects of Pollutants.

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Section: Mbrmentioning

confidence: 99%

Membrane processes

Arabi¹,

Pellegrin

Aguinaldo

et al. 2020

Water Environment Research

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“…The TN reduced in the anoxic zone because NO 3 -N was converted to N 2 by denitrifying bacteria using organic carbon sources when NO 3 -N flowed to the anoxic zone (Rasool, Ahn, & Sung Lee, 2014). The decrease in TN in the aerobic zone was caused by the function of floating spherical carriers, which can form aerobic-anoxic-anaerobic redox microenvironments in the structure that is conducive to simultaneous nitrification and denitrification (SND; Pang et al, 2018;Zhao et al, 2017). These microenvironments can partially denitrify in the aerobic zone, which improves the nitrogen removal effect in the case of overall nitrogen removal in the biofilm reactor.…”

Section: Editor's Choice-research Articlementioning

confidence: 99%

“…Hydrogenophaga is a type of facultative autotrophs associated with denitrification, and its higher proportion in the aerobic (10.8%) zone may also indicate the occurrence of simultaneous nitrification and denitrification (SND) in the aerobic zone. Dechloromonas is a long-lived microbial species associated with sludge reduction, which can effectively reduce the sludge yield of system (Pang et al, 2018) and accounts for 5% in the anoxic zone.…”

Section: Analysis Of Bacterial Taxonomymentioning

confidence: 99%

The nitrogen removal and sludge reduction performance of a multi‐stage anoxic/oxic (A/O) biofilm reactor

Wang

Liu³

et al. 2019

Water Environment Research

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To overcome the problems of high excess sludge yield and poor nitrogen removal efficiency in traditional biological treatment processes, a multi-stage A/O biofilm reactor was developed by combining the multi-stage A/O process with novel floating spherical carriers, resulting in repeated coupling of anoxic and aerobic environments. Results showed that the system achieved COD, NH + 4 − N, and TN removal efficiencies of 93.8%, 84.5%, and 75.7%, respectively, with average effluent concentrations lower than: 29.8 COD mg/L, 4.3 NH + 4 − N mg/L, and 13.2 TN mg/L. The observed sludge yield was 0.139 g MLSS/g COD, which was lower than that of the conventional activated sludge process. Microbial analysis showed that the community structure and cell morphology of microorganisms changed greatly with alternating aerobic-anoxic condition; high-throughput sequencing results proved that functional microorganisms can be enriched on the surface of the carries and therefore improved the nitrogen removal efficiency and meanwhile minimize the sludge yield within the system. • Practitioner points• The research innovatively developed a novel floating spherical carrier and coupled it with multi-stage A/O process. • The complex redox environments inside the floating spherical carriers improves the nitrogen removal efficiency and the sludge reduction effect. • Nitrospirae, Hydrogenophaga promoted the nitrogen removal, Firmicutes, Bacteroidetes and Dechloromonas promoted the in-situ sludge reduction of the system.

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“…Microbial community analyses aid in the understanding of the mechanism of a biological process. Proteobacteria and Bacteroidetes have be identified as the dominant phyla in the activated sludge generated during both municipal wastewater treatment and industrial wastewater treatment . Proteobacteria is regarded as one of the most widespread nitrification and denitrification phyla, and plays an important role in biological nitrogen and phosphorous removal as well as organic pollutant degradation .…”

Section: Introductionmentioning

confidence: 99%

“…Bacteroidetes is another dominant and common phylum in the activated sludge of wastewater treatment plants (WWTPs), and is responsible for metabolizing carbohydrates and decomposing complex or refractory organic compounds . In addition, Nitrospirae , Chloroflexi , Actinobacteria and Firmicutes are the main phyla commonly detected in activated sludge . However, the class, order, family and genus level of the microbial community are significantly influenced by wastewater characteristics, treatment processes and their operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced treatment of composite industrial wastewater using anaerobic‐anoxic‐oxic membrane bioreactor: performance, membrane fouling and microbial community

Wang

2019

J of Chemical Tech & Biotech

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BACKGROUND: A laboratory-scale anaerobic-anoxic-oxic membrane bioreactor (AAO-MBR) system was used to remove organic compounds and nitrogen in the composite industrial wastewater collected from an industrial park. RESULTS:The recommended conditions for both chemical oxygen demand (COD) and nitrogen removal were as follows: hydraulic retention time of 73.6 h, sludge retention time of 35 days and mixed liquor return ratio of 300%. Under this condition, COD and total nitrogen removal efficiencies were 89.4% and 77.7%, respectively. After treatment, most organic compounds were removed, but there were still a few refractory organic compounds in the final effluent, such as 2-hydroxydesmethylimipramine, 1-dichloromethyl-3-methyl-benzene and N-phenyl-2,3-dichloromaleimide. Compared to carbohydrates, proteins in the extracellular polymetric substances accumulated more easily on the membrane surface, resulting in the membrane fouling. Ternary analysis at the family level indicated that the bacteria Desulfuromonadaceae, Rikenellaceae, and Spirochaetaceae were dominant in the anaerobic sludge, and played an important role in hydrolysis and fermentation. The abundance distributions of Nitromonadaceae, Caldilineaceae and Xanthomonadales were above 50% in the anoxic sludge, and these bacteria played an important role in denitrification. CONCLUSION:The results can provide valuable information for optimizing the operation of the AAO-MBR system for the treatment of composite industrial wastewater. Industry the anaerobic, anoxic and oxic membrane bioreactor (O-MBR) tanks were taken from the anaerobic, anoxic and oxic tanks in the CWWTP, respectively. Experimental setup and operational conditionsThe setup and operation of the laboratory-scale AAO-MBR system was similar to the CWWTP, and its schematic diagram is also shown in Fig. S1. The working volumes of the anaerobic, anoxic and O-MBR systems were 13.3, 13.0 and 16.0 L, respectively. A sedimentation reactor with a working volume of 20.0 L was set between the anaerobic reactor and the anoxic reactorNitrogen removal NH 4 + -N removal by the AAO-MBR system during the entire operation period is shown in Fig. 1(b). The NH 4 + -N concentration in

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Sludge reduction and microbial structures of aerobic, micro-aerobic and anaerobic side-stream reactor coupled membrane bioreactors

Cited by 39 publications

References 35 publications

Membrane processes

Membrane processes

The nitrogen removal and sludge reduction performance of a multi‐stage anoxic/oxic (A/O) biofilm reactor

Enhanced treatment of composite industrial wastewater using anaerobic‐anoxic‐oxic membrane bioreactor: performance, membrane fouling and microbial community

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