Investigation of soluble microbial products in a full-scale UASB reactor running at low organic loading rate

Zhou, Weili; Wu, Bingtao; She, Qianhong; Na, Li; Zhang, Zhenjia

doi:10.1016/j.biortech.2009.03.006

Cited by 50 publications

(47 citation statements)

References 24 publications

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“…Literatures proved that acidificate bacteria produce more SMP than methanogenic bacteria [10]. And other research indicated that methanogenic bacteria maybe even consume SMP produced by acidogenesis bacteria [11]. It also could be seen that SMP/SCOD in the front compartments were low (0.246-0.332), it indicated that large part of the organic matter in these compartments was VFA.…”

Section: A Reactor Performance At Start-up and Steady-statementioning

confidence: 95%

Formation of soluble microbial products (SMP) in an anaerobic sludge system

2011

2011 Second International Conference on Mechanic Automation and Control Engineering

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A bench-scale experiment has been carried out to investigate the formation of soluble microbial products in an anaerobic baffled reactor (ABR) treating buffered synthetic glucose substrate (about 500mg COD/L) under mesophilic temperatures. Generally, SMP production increased with decreasing temperature. A higher SMP to soluble chemical oxygen demand (SCOD) ratio was found at high temperature because of complete volatile fatty acid degradation. SMP accounted for amount to 0.85 of the SCOD in the effluent of the ABR. The performance of each compartment under organic load shock was different. In general, the fluctuation of SMP concentration in acidogenesis zone was bigger than in methanogenic zone which probably due to more SMPs are produced during acidogenesis than during methanogenesis. The other reason probally was the microorganisms in the rear compartment extremely deficient in nutrients and the SMP was partially consumed as a secondary metabolite.

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Section: A Reactor Performance At Start-up and Steady-statementioning

confidence: 95%

Formation of soluble microbial products (SMP) in an anaerobic sludge system

2011

2011 Second International Conference on Mechanic Automation and Control Engineering

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“…High rate UASB reactors are popular and have been applied widely due to their ability to manage high OLRs, short HTRs, and low energy requirements [31,32]. A number of full-scale plants are operational and several others are at present under construction, especially in tropical or subtropical areas [33,34]. Table 3 summarizes the advantages and disadvantages of UASB reactor.…”

Section: Treatment Potential Of Uasb Processmentioning

confidence: 99%

Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

Daud

Rizvi

Akram

et al. 2018

Journal of Chemistry

102

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The upflow anaerobic sludge blanket (UASB) reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. The objective of this study was to perform literature review on the treatment of domestic sewage using the UASB reactor as the core component and identifying future areas of research. The merits of anaerobic and aerobic bioreactors are highlighted and other sewage treatment technologies are compared with UASB on the basis of performance, resource recovery potential, and cost. The comparison supports UASB as a suitable option on the basis of performance, green energy generation, minimal space requirement, and low capital, operation, and maintenance costs. The main process parameters such as temperature, hydraulic retention time (HRT), organic loading rate (OLR), pH, granulation, and mixing and their effects on the performance of UASB reactor and hydrogen production are presented for achieving optimal results. Feasible posttreatment steps are also identified for effective discharge and/or reuse of treated water.

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“…The specific pollutants in the different groups are closely related to the characteristics of the feedwater. Contaminants specifically present in raw and treated wastewaters are particles, colloids, and organic macromolecules such as polysaccharides, humic substances, and proteins [23]. In addition, these substances are also commonly found in natural waters such as rivers, seawater, and ground waters [13].…”

Section: Fouling In Fo Membranesmentioning

confidence: 99%

“…In addition, these substances are also commonly found in natural waters such as rivers, seawater, and ground waters [13]. Zhou et al [23] used gas chromatography-mass spectrometry (GC-MS) to identify soluble microbial products (SMPs) containing a large portion of polysaccharides, proteins and humic substances in raw and wastewater. Recently, organic carbon detectionorganic nitrogen detection (LC-OCD-OND) has become increasingly popular for the identification of these pollutants [24].…”

Section: Fouling In Fo Membranesmentioning

confidence: 99%

“…These microorganisms can also be found in natural waters and cause biofouling in seawater and brackish water desalination [24]. Microbial populations within the biofilm can be characterized by analysis of DNA extracted from living cells using microbiological methods such as polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) and fluorescent in situ hybridization (FISH) [23].…”

Section: Fouling In Fo Membranesmentioning

confidence: 99%

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Forward Osmosis Membranes – A Review: Part II

Eyvaz¹,

Arslan²,

İmer³

et al. 2018

Osmotically Driven Membrane Processes - Approach, Development and Current Status

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Forward osmosis (FO) is a technical term describing the natural phenomenon of osmosis: the transport of water molecules across a semipermeable membrane by osmotic pressure from a feed solution (FS) to a draw solution (DS). The diluted DS is then reconcentrated to recycle the draw solutes as well as to produce purified water. As the driving force is only the osmotic pressure difference between two solutions, meaning that there is no need to apply an external energy, this results in low fouling propensity of membrane and minimization of irreversible cake forming, which are the main problems controverted by membrane applications, especially in biological treatment systems (e.g., FO membrane bioreactor (FO-MBR)). The purpose of the book chapter is to bring an overview on the FO membrane manufacturing, characterizing and application area at laboratory or full scales. This book chapter is published in two parts. In the second part, which appears here, characterization of mass transport in FO membranes, fouling mechanisms and foulants on FO membranes in naturally asymmetric structure and application areas of FO membranes in the literature are mentioned. Cutting-edge technologies on FO studies are comprehensively reviewed and following major and minor titles are stated truly on the new technologies.

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Investigation of soluble microbial products in a full-scale UASB reactor running at low organic loading rate

Cited by 50 publications

References 24 publications

Formation of soluble microbial products (SMP) in an anaerobic sludge system

Formation of soluble microbial products (SMP) in an anaerobic sludge system

Review of Upflow Anaerobic Sludge Blanket Reactor Technology: Effect of Different Parameters and Developments for Domestic Wastewater Treatment

Forward Osmosis Membranes – A Review: Part II

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