Performance of a bioreactor with submerged membranes for aerobic treatment of municipal waste water

Rosenberger, S.; Krüger, Urse Scheel; Witzig, Robert; Manz, Werner; Szewzyk, Ulrich; Kraume, Matthias

doi:10.1016/s0043-1354(01)00223-8

Cited by 280 publications

(135 citation statements)

References 15 publications

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“…In this study, the average MLSS was around 5.8 g·ℓ -1 and the VSS/MLSS ratio was around 0.6. The latter is somewhat lower than the reported range of 0.7-0.9 in biological treatment (Rosenberger et al, 2002). In these tests, the HRT was relatively high compared to typical values of 6-12 h for low-strength municipal wastewater.…”

Section: Cod Nitrogen and Phosphorus Removalcontrasting

confidence: 59%

Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

Tewari

Singh

Batra

et al. 2012

WSA

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This paper presents the initial findings of field testing of 2 low-cost membrane filters, viz. 30 μm polymeric mesh and 2-6 μm macroporous waste-ash based ceramic filter, in a submerged membrane bioreactor (MBR) employing batch anoxic and aerobic conditions. The influent was raw wastewater from a residential complex located near Delhi, India. The results indicated that the ceramic filter was able to operate for longer periods without cleaning; however, there is a limit to the transmembrane pressure it can withstand. The suspended solids retention was high with both filters (average of 96%). Moderate reduction in chemical oxygen demand (COD), total nitrogen (NH 4 + ) and total phosphorus (PO 4 3-) was achieved. The improvements in operation required in such systems are also underlined.

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Section: Cod Nitrogen and Phosphorus Removalcontrasting

confidence: 59%

Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

Tewari

Singh

Batra

et al. 2012

WSA

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“…Zero sludge production could be achieved at high sludge concentration (15-23 g/l) and F=M ratios as low as about 0.07 Kg COD (kg MLSS) À1 d À1 in a pilot submerged MBR with complete sludge retention [82,83]. Their investigations showed that the sludge reduction in MBR systems by higher organisms (protozoa/metazoa) was ruled out, and bacteria maintenance metabolism caused little/zero sludge production [80][81][82][83][84][85]. The absence of protozoa and metazoa in MBR systems occurred in their observations, but no reason was given to explain it.…”

Section: Membrane Bioreactormentioning

confidence: 99%

Minimization of excess sludge production for biological wastewater treatment

Wei

Houten²,

Borger³

et al. 2003

Water Research

618

278

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Excess sludge treatment and disposal currently represents a rising challenge for wastewater treatment plants (WWTPs) due to economic, environmental and regulation factors. There is therefore considerable impetus to explore and develop strategies and technologies for reducing excess sludge production in biological wastewater treatment processes. This paper reviews current strategies for reducing sludge production based on these mechanisms: lysis-cryptic growth, uncoupling metabolism, maintenance metabolism, and predation on bacteria. The strategies for sludge reduction should be evaluated and chosen for practical application using costs analysis and assessment of environmental impact. High costs still limit technologies of sludge ozonation-cryptic growth and membrane bioreactor from spreading application in full-scale WWTPs. Bioacclimation and harmful to environment are major bottlenecks for chemical uncoupler in practical application. Sludge reduction induced by oligochaetes may present a cost-effective way for WWTPs if unstable worm growth is solved. Employing any strategy for reducing sludge production may have an impact on microbial community in biological wastewater treatment processes. This impact may influence the sludge characteristics and the quality of effluent. r

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“…Membrane bioreactors (MBR), which permit a very long sludge retention time (SRT), high mixed liquor suspended solids (MLSS) and low F/M ratio due to the interception of the membrane, have been found to be advantageous over the conventional activated sludge system in terms of system stability and compactness, especially for nitrification (Luxmy et al, 2000;Rosenberger et al, 2002;Stamper et al, 2003). However, how to operate MBR systems efficiently remains a topic of argument because of the lack of sufficient information on the development of microbial community structure in MBRs during nitrification.…”

Section: Introductionmentioning

confidence: 99%

Nitrification performance and microbial community dynamics in a submerged membrane bioreactor with complete sludge retention

Yang

Zhang

et al. 2006

Journal of Biotechnology

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A submerged membrane bioreactor (MBR) supplied with inorganic ammonium-bearing wastewater (NH 4 + -N, 500 mg l −1 ) was operated for 260 days without sludge purge under decreased hydraulic retention times (HRT) through six steps (from 30 to 5 h). Almost complete nitrification was obtained at a volumetric loading rate (VLR) 1.2 g NH 4 + -N l −1 day −1 . The sludge nitrification activities were evaluated at each stage. The specific ammonium oxidizing rate (SAOR) decreased from the initial 0.45 to 0.15 kg NH 4 + -N kg −1 MLSS day −1 in the last four stages, while the specific nitrate forming rate (SNFR) increased from 0.17 to 0.39 kg NO 3 − -N kg −1 MLSS day −1 at the third stage, and then decreased to below 0.1 kg NO 3from the fourth stage. Microbial population dynamics was investigated by a combination of the MPN method, fluorescence in situ hybridization (FISH) and quinone profiles. During the experiment, although the MLSS increased gradually from 4.5 to 11.5 g l −1 , the number of ammonia-oxidizing bacteria (AOB) decreased from 10 9 l −1 at the third stage to 10 7 l −1 in the last two stages, and that of nitrite-oxidizing bacteria (NOB) decreased gradually from 10 8 l −1 at the second stage (HRT of 20 h) to the final 10 5 l −1 . FISH results showed that the active cells decreased gradually with time from about 60 to 20% in the last two stages, and most of sludge was inert cells. The sum of nitrifiers occupied only about 10% of the total bacteria number in the last stage even though only ammonium-bearing inorganic wastewater was fed in. Nitrosomonas sp. and Nitrospira sp. were confirmed by FISH as the dominant nitrifying genera responsible for ammonia and nitrite oxidation, respectively. In the mean time, a small ratio of Nitrobacter sp. also existed in the system. FISH analysis matched better with the batch activity test results than did the MPN techniques. Quinone profiles revealed that the dominant ubiquinone was ubiquinone-8 (UQ-8), ranging from 84 to 66%, followed by UQ-10 of 7-13%, UQ-7 of 3-5% and UQ-9 of 1.6-2.6%. The dominant menaquinone in the MBR was menaquinone-7 (MK-7) followed by MK-6, MK-8 and MK-8 (H 2 ). With the prolongation of operation, the percentage of menaquinones increased from 8 to 14%. The use of the polyphasic approach gave some new insight on variations of microbial community structures.

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Performance of a bioreactor with submerged membranes for aerobic treatment of municipal waste water

Cited by 280 publications

References 15 publications

Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

Field testing of polymeric mesh and ash-based ceramic membranes in a membrane bioreactor (MBR) for decentralised sewage treatment

Minimization of excess sludge production for biological wastewater treatment

Nitrification performance and microbial community dynamics in a submerged membrane bioreactor with complete sludge retention

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