Feasibility study of a pilot-scale sewage treatment system combining an up-flow anaerobic sludge blanket (UASB) and an aerated fixed bed (AFB) reactor at ambient temperature

Sumino, Haruhiko; Takahashi, Masanobu; Yamaguchi, Takashi; Abe, Kenichi; Araki, Nobuo; Yamazaki, Shinichi; Shimozaki, Satoshi; Nagano, Akihiro; Nishio, Naomichi

doi:10.1016/j.biortech.2005.10.020

Cited by 36 publications

(15 citation statements)

References 16 publications

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“…Throughout the whole operation, the system was operated with a total HRT 8.8 h (ANF 4 h, WDSRBC 4.8 h) for 160 days. Even though the influent concentration of COD was fluctuated in range of 54.2-147.4 mg/L, the effluent concentration of COD remained stable, resulting in the total average COD removal efficiency of 61.4% ± 4.3%, which was higher than previous reports for aerated fixed bed (47.6% of COD removal) treating the effluent of UASB [31]. For the ANF unit, the average COD removal efficiency was 43.0% ± 4.0%, while the effluent COD concentration was 51.6 ± 10.4 mg/L.…”

Section: Performance Of the Anf-wdsrbc System At Steady Statecontrasting

confidence: 62%

“…Among these reactors of the system, it was remarkably observed that ANF was the predominant contributor in COD removal with the WDSRBC effluent recirculation. previous reports for aerated fixed bed (47.6% of COD removal) treating the effluent of UASB [31]. For the ANF unit, the average COD removal efficiency was 43.0% ± 4.0%, while the effluent COD concentration was 51.6 ± 10.4 mg/L.…”

Section: Performance Of the Anf-wdsrbc System At Steady Statementioning

confidence: 65%

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Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Li¹,

Lü²

2017

Water

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Abstract:Recently, more decentralized wastewater treatments are of great interest for rural regions. In this work, a novel ANF-WDSRBC system combined with an anoxic filter (ANF) and a four-stage water-dropping-self-rotating biological contactor (WDSRBC) was designed as a post-treatment option. With a total hydraulic retention time (HRT) of 8.8 h and reflux ratio of 1:1, the ANF-WDSRBC system was operated 160 days. The results showed the ANF-WDSRBC system had better performance without mechanical aeration devices, the removal efficiencies of chemical oxygen demand (COD), ammonia (NH 4 + -N) and total nitrogen (TN) were 61.4% ± 4.3%, 86.1% ± 3.7%, and 54.5% ± 3.9%, respectively. By means of high-throughput MiSeq sequencing, the results suggested that Proteobacteria, Bacteroidetes, Firmicutes, and Chloroflexi were the predominant phyla in the system. In the WDSRBC units, Nitrosomonas, Nitrosospira, Bacillus, and Nitrospira were the main genera to take part in nitrification. Longilinea, Bellilinea, Thiobacillus, and Thauera in the ANF unit were the main genera to participate in denitrification and organic matters degradation. The novel ANF-WDSRBC system had great potential in the post-treatment of decentralized domestic wastewater.

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Section: Performance Of the Anf-wdsrbc System At Steady Statecontrasting

confidence: 62%

Section: Performance Of the Anf-wdsrbc System At Steady Statementioning

confidence: 65%

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Li¹,

Lü²

2017

Water

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“…Microorganism activity test DHA has been used to monitor the biological activity, which is related to a group of enzymes participating in the metabolic reactions for energy production (e.g., in the form of adenosine triphosphate) through the oxidation of organic matters [38]. SMA test has also been widely used to determine the anaerobic sludge activity in various anaerobic processes [39,40]. The two indicators were used to characterize the microorganism activities of membrane foulants and bulk sludge in the AnDMBR.…”

Section: Xrf Analysismentioning

confidence: 99%

Membrane fouling in an anaerobic dynamic membrane bioreactor (AnDMBR) for municipal wastewater treatment: Characteristics of membrane foulants and bulk sludge

Zhang

Wang

et al. 2011

Process Biochemistry

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“…The anaerobic-aerobic treatment of domestic wastewater was studied in several combinations, i.e. up-flow anaerobic sludge blanket (UASB)-moving bed biofilm reactor [2], UASB-aerated fixed bed [3] and UASB-rotating biological contactor [4], etc. An affordable and promising treatment system namely down-flow hanging sponge (DHS) as a post-treatment in combination with UASB reactor as a pre-treatment has been recently implemented for sewage treatment in developing countries [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Effect of sponge volume on the performance of down-flow hanging sponge system treating UASB reactor effluent

Tawfik

Ohashi

Harada

2009

Bioprocess Biosyst Eng

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The performance of down-flow hanging sponge (DHS) system treating UASB reactor effluent at different sponge volume of 38.2, 28.7, 19.1 and 9.6% was investigated. The hydraulic retention time (HRT) and flow rate were kept constant at 2.6 h and 0.46 m(3)/day, respectively. The results obtained indicated that reducing the sponge volume of the DHS system from 38.2 to 19.1% significantly decreased the removal efficiency of COD(total) from 80 +/- 8 to 62 +/- 14%; COD(soluble) from 71.2 +/- 10 to 53.7 +/- 18% and COD(particulate) from 86 +/- 10 to 62 +/- 15%. With further reduction of the sponge volume down to 9.6%, the removal efficiency was dropped to 54 +/- 15% for COD(total); 44.1 +/- 14% for COD(soluble) and 42 +/- 12% for COD(particulate). Likewise, the nitrification efficiency and fecal coliform (FC) removal was strongly affected by decreasing the sponge volume of the DHS system, i.e., the nitrification efficiency was dropped by a value of 48.3% when reducing the sponge volume of the DHS system from 38.2 to 19.1%. At sponge volume of 38.2%, the DHS system removes 2.6 +/- 0.3 log(10)/100 ml of FC which is significantly higher than that at sponge volume of 28.7, 19.1 and 9.6%. Accordingly, it is recommended to design and operate such a system at a bulk sponge volume not exceeding 38.2% of the total reactor volume and at an HRT of 2.6 h.

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Feasibility study of a pilot-scale sewage treatment system combining an up-flow anaerobic sludge blanket (UASB) and an aerated fixed bed (AFB) reactor at ambient temperature

Cited by 36 publications

References 16 publications

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Membrane fouling in an anaerobic dynamic membrane bioreactor (AnDMBR) for municipal wastewater treatment: Characteristics of membrane foulants and bulk sludge

Effect of sponge volume on the performance of down-flow hanging sponge system treating UASB reactor effluent

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