Domestic wastewater treatment using an anaerobic bioreactor coupled with membrane filtration

Wen, Cheng; Huang, Xia; Qian, Yi

doi:10.1016/s0032-9592(99)00076-x

Cited by 107 publications

(58 citation statements)

References 5 publications

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“…Membrane bioreactors (MBRs) have recently emerged as effective methods for treating wastewater under aerobic and anaerobic conditions (Beaubien et al, 1995;Defrance and Jaffrin, 1999;Wen et al, 1999). The advantages of MBRs include: higher biomass concentrations in the reactor that produces higher organics removal rates; decreased reactor volume due to higher removal rates; smaller excess sludge production due to biomass decay in the reactor; and a highquality effluent due to complete removal of bacteria by the membrane (Cicek et al, 1998;Defrance and Jaffrin, 1999).…”

Section: Introductionmentioning

confidence: 99%

Biological hydrogen production using a membrane bioreactor

Iyer

Bruns

et al. 2004

Biotech & Bioengineering

183

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A cross-flow membrane was coupled to a chemostat to create an anaerobic membrane bioreactor (MBR) for biological hydrogen production. The reactor was fed glucose (10,000 mg/L) and inoculated with a soil inoculum heat-treated to kill non-spore-forming methanogens. Hydrogen gas was consistently produced at a concentration of 57-60% in the headspace under all conditions. When operated in chemostat mode (no flow through the membrane) at a hydraulic retention time (HRT) of 3.3 h, 90% of the glucose was removed, producing 2200 mg/L of cells and 500 mL/h of biogas. When operated in MBR mode, the solids retention time (SRT) was increased to SRT = 12 h producing a solids concentration in the reactor of 5800 mg/L. This SRT increased the overall glucose utilization (98%), the biogas production rate (640 mL/h), and the conversion efficiency of glucose-to-hydrogen from 22% (no MBR) to 25% (based on a maximum of 4 mol-H(2)/mol-glucose). When the SRT was increased from 5 h to 48 h, glucose utilization (99%) and biomass concentrations (8,800 +/- 600 mg/L) both increased. However, the biogas production decreased (310 +/- 40 mL/h) and the glucose-to-hydrogen conversion efficiency decreased from 37 +/- 4% to 18 +/- 3%. Sustained permeate flows through the membrane were in the range of 57 to 60 L/m(2) h for three different membrane pore sizes (0.3, 0.5, and 0.8 microm). Most (93.7% to 99.3%) of the membrane resistance was due to internal fouling and the reversible cake resistance, and not the membrane itself. Regular backpulsing was essential for maintaining permeate flux through the membrane. Analysis of DNA sequences using ribosomal intergenic spacer analysis indicated bacteria were most closely related to members of Clostridiaceae and Flexibacteraceae, including Clostridium acidisoli CAC237756 (97%), Linmingia china AF481148 (97%), and Cytophaga sp. MDA2507 AF238333 (99%). No PCR amplification of 16s rRNA genes was obtained when archaea-specific primers were used.

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Section: Introductionmentioning

confidence: 99%

Biological hydrogen production using a membrane bioreactor

Iyer

Bruns

et al. 2004

Biotech & Bioengineering

183

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“…Since filtration drag force as well as its torque is directly related to filtration flux, it is understandable that flux should be a crucial fouling-inducing factor. The significance has been confirmed by extensive works [90][91][92][93]. Moreover, there exists a critical flux over which fouling will deteriorate sharply [91], possibly corresponding to the filtration drag effect overwhelming the back-transport effects.…”

Section: Fouling Mechanismsmentioning

confidence: 85%

“…Local conditions include filtration mode (of constant-flux or constant-pressure), flux [90][91][92][93], TMP [46], etc., conceptually perpendicular to membrane surface, and cross-flow velocity (CFV) [90], cross-flow pattern [77,94], shear rate [45,95], etc., parallel to membrane surface. Additionally, the manner of the periodic alternation of these hydraulic conditions, for instance, suction/relaxation proportion [91,92,96] or online backwash interval and duration [97,98], could also affect fouling. The fouling-related bulk environment may include temperature [98,99], pH [100], viscosity [85], etc.…”

Section: Membrane Foulingmentioning

confidence: 99%

“…Moreover, it is also recognized that the suction/relaxation alternation could have significant impacts [91]. It was found that in one suction/relaxation circle, too long suction-time and too short relaxation-time rendered severe fouling [92], while shortened suction-time and prolonged relaxation-time over an appropriate range could alleviate fouling but with the effectiveness of further adjustment limited [96]. It is worthy of additional note that, the suction/relaxation-time ratio did not show monotonic correlation with fouling propensity [92], thus may create difficulties with predictive assessment of parameter optimization.…”

Section: Operational Improvementmentioning

confidence: 99%

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Recent advances in membrane bioreactor technology for wastewater treatment in China

Huang

Xiao

Shen

2010

Front. Environ. Sci. Eng. China

Self Cite

100

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Since the introduction of the membrane bioreactor (MBR) in China in the early 1990s, remarkable progress has been achieved on the research and application of this technology. China has now become one of the most active fields in the world in this regard. This review outlines the development of MBR-based processes in China and their performance of treating municipal and industrial wastewaters. Since membrane fouling is a critical operational problem with MBR processes, this paper also proposes updated understanding of fouling mechanisms and strategies of fouling control, which are mainly compiled from publications of Chinese researchers. As for the commercial application of MBR in the country, the latest statistics of large-scale MBR plants ( > 10000 m 3 $d -1 ) are provided, and the growth trend of total treatment capacity as well as its driving force is analyzed.

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“…In anaerobic treatment systems, long SRTs are critical to successful operation because of the low growth rates of methanogenic bacteria. Laboratory experiments have successfully demonstrated the application of a membrane in an anaerobic domestic wastewater reactor (Wen et al, 1999), although research on the technique is limited at present.…”

Section: Cutting Energy Use In Wastewater Treatment Operationsmentioning

confidence: 99%