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A hybrid membrane process for simultaneous thickening and digestion of waste activated sludge

Zhiwei WANG, Qiaoying WANG, Zhichao WU, Xinhua WANG,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 3,   Pages 272-279 doi: 10.1007/s11783-010-0234-x

Abstract: A hybrid membrane process for simultaneous sludge thickening and digestion (MSTD) was studied.The thickening and digestion effects in the MSTD were further analyzed based on a mass balance analysis

Keywords： membrane filtration     sludge digestion     sludge thickening     waste activated sludge    

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Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 319-326 doi: 10.1007/s11783-014-0758-6

Abstract: Sludge thickening occurs in the lower portions of secondary clarifiers during their operation.In this study, by detecting the hindered zone from the complete thickening process of activated sludgesludge thickening in the hindered zone was developed.However, sludge thickening in the compression zone was not studied because sludge in the compressionTo explore different sludge settling and thickening mechanisms, the curves of sludge thickening and sludge

Keywords： wastewater treatment plants     secondary settler     sludge thickening     sludge settling     hindered zone    

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Enhancement of sludge gravitational thickening with weak ultrasound

Panyue ZHANG, Tian WAN, Guangming ZHANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 753-760 doi: 10.1007/s11783-011-0368-5

Abstract: Gravitational thickening is the prevailing method to reduce sludge volume but the process is slow andThis paper investigated the potential benefits of sonication on enhancing the sludge gravitational thickeningWeak sonication (<680 kJ·kg DS) improved the sludge gravitational thickening while high ultrasonic energyConsidering both the sludge thickening efficiency and energy consumption, the optimum conditions wereWeak sonication could substitute expensive polyelectrolyte coagulant for sludge thickening.

Keywords： activated sludge     sonication     settlability     dry weight     extracellular polymeric substances     polyelectrolyte    

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A full-scale integrated-bioreactor with two zones treating odours from sludge thickening tank and dewatering

Jianwei Liu, Kaixiong Yang, Lin Li, Jingying Zhang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 4, doi: 10.1007/s11783-017-0932-8

Abstract: A full-scale integrated-bioreactor consisting of a suspended zone and an immobilized zone was employed to treat the ordours emitted from a wastewater treatment plant. The inlet concentrations of H S and NH were 1.6–38.6 mg·m and 0.1–6.7 mg·m , respectively, while the steady-state outlet concentrations were reduced to 0–2.8 mg·m for H S and 0–0.5 mg·m for NH . Both H S and NH were eliminated effectively by the integrated bioreactor. The removal efficiencies of H S and NH differed between the two zones. Four species of microorganisms related to the degradation of H S and NH were isolated. The characteristics and distributions of the microbes in the bioreactor depended on the inlet concentration of substrates and the micro-environmental conditions in the individual zones. Product analysis indicated that most of the H S was oxidized into sulfate in the immobilized zone but was dissolved into the liquid phase in the suspended zone. A large amount of NH was converted into nitrate and nitrite by nitration in the suspended zone, whereas only a small amount of NH was transferred to the aqueous phase mainly by absorption or chemical neutralization in the immobilized zone. Different microbial populations dominated the individual zones, and the major biodegradation products varied accordingly.

Keywords： Biological deodorization     Microbial characteristics     Ammonia     Hydrogen sulfide     Wastewater treatment plant    

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Comparison between inhibitor and uncoupler for minimizing excess sludge production of an activated sludge

CHEN Guowei, XI Pengge, XU Deqian, YU Hanqing

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 63-66 doi: 10.1007/s11783-007-0012-6

Abstract: In order to study the minimization of excess sludge production, the reduction in the excess sludge productionThe experimental results show that such an addition could effectively reduce the production of excess sludgeestablished in this work, energy uncoupling coefficient () was used to evaluate the reduction in excess sludgepresence of dNP, and that dNP was an effective uncoupler for reducing the production of excess activated sludge

Keywords： uncoupling coefficient     Cu     minimization     presence     uncoupling    

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Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1488-1

Abstract:

• Adding kaolin/zeolite promotes the formation of stable heavy metals.

Keywords： Co-pyrolysis     Sewage sludge     Heavy metals     Rotary kiln     Immobilization mechanism    

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Cultivation of aerobic granular sludge in a conventional, continuous flow, completely mixed activatedsludge system

Xi CHEN,Linjiang YUAN,Wenjuan LU,Yuyou LI,Pei LIU,Kun NIE

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 2,   Pages 324-333 doi: 10.1007/s11783-014-0627-3

Abstract: Aerobic granules were formed in a conventional, continuous flow, completely mixed activated sludge systemThe reactor was inoculated with seed sludge containing few filaments and fed with synthetic municipalThe settling time of the sludge and the average dissolved oxygen (DO) of the reactor were 2 h and 4.2The reactor was agitated by a stirrer, with a speed of 250 r·min , to ensure good mixing．The granular sludgehad good settleability, and the sludge volume index (SVI) was between 50 and 90 mL·g .

Keywords： aerobic granular sludge     completely mixed activated sludge system (CMAS)     continuous flow     shear force     filamentous    

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Control of sludge settleability and nitrogen removal under low dissolved oxygen condition

Zhaoxu PENG, Yongzhen PENG, Zhenbo YU, Xuliang LIU, Xiaoling LI, Randeng WANG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 6,   Pages 884-891 doi: 10.1007/s11783-012-0408-9

Abstract: Low dissolved oxygen (DO) is an energy-saving condition in activated sludge process.and setting pre-anoxic (anaerobic) phase were effective strategies to induce and inhibit filamentous sludgeAccording to the sludge settleability, LFB could be maintained steadily by adjusting operation patternsFilamentous bacteria content and sludge volume index (SVI) were likely correlated.settleability in spite of the unstable status of activated sludge system.

Keywords： limited filamentous bulking     sequencing batch reactor     sludge settleability     sludge volume index     simultaneous    

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High-solid anaerobic digestion of sewage sludge: achievements and perspectives

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1364-4

Abstract:

• High-solid anaerobic digestion (HS-AD) of sewage sludge (SS) is overviewed

Keywords： High-solid effect     Anaerobic fermentation     Methane production     Biodegradability     Sludge treatment    

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A review on sustainable reuse applications of Fenton sludge during wastewater treatment

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1511-6

Abstract:

• The sustainable approaches related to Fenton sludge reuse systems

Keywords： Fenton sludge     Heavy metals     Coagulant     Iron source     Heterogeneous catalyst    

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Properties and effect of forming sewage sludge into lightweight ceramics

Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 117-124 doi: 10.1007/s11783-010-0220-3

Abstract: In this work we investigated the chemical, thermal and toxic properties of dried sewage sludge (DSS),the preparation and properties of lightweight sludge ceramic (LSC) and the mechanisms of action of the

Keywords： sludge     foaming agents     ceramics     preheating process    

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Effect of wastewater composition on the calcium carbonate precipitation in upflow anaerobic sludge blanket

Shucheng YANG, Yanling HE, Charles CHOU, Pengxiang ZHANG, Dongqi WANG, Yonghong LIU,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 142-149 doi: 10.1007/s11783-010-0026-3

Abstract: to study the effect of wastewater composition on calcium carbonate precipitation in upflow anaerobic sludgehad significant influence on the location of calcium carbonate precipitation in anaerobic granular sludgewhich was expected due to the different methanogens distribution and pH gradient within the granular sludgecarbonate precipitation substantially affected the specific methanogenic activity (SMA) of the granular sludge

Keywords： calcium carbonate     precipitation     anaerobic granular sludge     wastewater composition     microstructure     upflowanaerobic sludge blanket (UASB)    

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New insights into different surfactants’ impacts on sludge fermentation: Focusing on the particular metabolic

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1527-6

Abstract:

• The promoting effects for VFA generation follow the order of APG>SDBS>HTAB.

Keywords： Waste activated sludge (WAS)     Volatile fatty acids (VFA)     Surfactant types     Functional microorganisms    

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Fate of proteins of waste activated sludge during thermal alkali pretreatment in terms of sludge protein

Xiaoli Song, Zhenghua Shi, Xiufen Li, Xinhua Wang, Yueping Ren

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1114-7

Abstract: itemcontent>

Over 90 min of TAH at the optimal condition, 67.59% sludge

Keywords： Sludge flocs     Microbial cells     Hydrolysate     Protein breakdown     Melanoidin    

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Co-application of energy uncoupling and ultrafiltration in sludge treatment: Evaluations of sludge reduction

An Ding, Yingxue Zhao, Zhongsen Yan, Langming Bai, Haiyang Yang, Heng Liang, Guibai Li, Nanqi Ren

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 4, doi: 10.1007/s11783-020-1238-9

Abstract: Effects of metabolic uncouplers addition on sludge reduction were carried out.TCS addition effectively inhibited ATP synthesis and reduced sludge yield.Suitable dosage retarded biofouling during sludge water recovery by UF membrane.Additionally, due to low sludge concentrations and EPS contents, addition of 30–60 mg/L TCS during sludgereduction and sludge supernatant recovery.

Keywords： Sludge reduction     Energy uncoupling     Ultrafiltration membrane     Membrane fouling    

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Title Author Date Type Operation

A hybrid membrane process for simultaneous thickening and digestion of waste activated sludge

Zhiwei WANG, Qiaoying WANG, Zhichao WU, Xinhua WANG,

Journal Article

Simple model of sludge thickening process in secondary settlers

Yuankai ZHANG,Hongchen WANG,Lu QI,Guohua LIU,Zhijiang HE,Songzhu JIANG

Journal Article

Enhancement of sludge gravitational thickening with weak ultrasound

Panyue ZHANG, Tian WAN, Guangming ZHANG

Journal Article

A full-scale integrated-bioreactor with two zones treating odours from sludge thickening tank and dewatering

Jianwei Liu, Kaixiong Yang, Lin Li, Jingying Zhang

Journal Article

Comparison between inhibitor and uncoupler for minimizing excess sludge production of an activated sludge

CHEN Guowei, XI Pengge, XU Deqian, YU Hanqing

Journal Article

Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Journal Article

Cultivation of aerobic granular sludge in a conventional, continuous flow, completely mixed activatedsludge system

Xi CHEN,Linjiang YUAN,Wenjuan LU,Yuyou LI,Pei LIU,Kun NIE

Journal Article

Control of sludge settleability and nitrogen removal under low dissolved oxygen condition

Zhaoxu PENG, Yongzhen PENG, Zhenbo YU, Xuliang LIU, Xiaoling LI, Randeng WANG

Journal Article

High-solid anaerobic digestion of sewage sludge: achievements and perspectives

Journal Article

A review on sustainable reuse applications of Fenton sludge during wastewater treatment

Journal Article

Properties and effect of forming sewage sludge into lightweight ceramics

Min YUE, Qinyan YUE, Yuanfeng QI, Baoyu GAO, Hui YU

Journal Article

Effect of wastewater composition on the calcium carbonate precipitation in upflow anaerobic sludge blanket

Shucheng YANG, Yanling HE, Charles CHOU, Pengxiang ZHANG, Dongqi WANG, Yonghong LIU,

Journal Article

New insights into different surfactants’ impacts on sludge fermentation: Focusing on the particular metabolic

Journal Article

Fate of proteins of waste activated sludge during thermal alkali pretreatment in terms of sludge protein

Xiaoli Song, Zhenghua Shi, Xiufen Li, Xinhua Wang, Yueping Ren

Journal Article

Co-application of energy uncoupling and ultrafiltration in sludge treatment: Evaluations of sludge reduction

An Ding, Yingxue Zhao, Zhongsen Yan, Langming Bai, Haiyang Yang, Heng Liang, Guibai Li, Nanqi Ren

Journal Article