Effects of increasing organic loading rate on performance and microbial community shift of an up-flow anaerobic sludge blanket reactor treating diluted pharmaceutical wastewater

The performance of upflow anaerobic sludge blanket (UASB) fed with three metabolic intermediate (acetate, ethanol, and propionate) respectively was studied. The degradation of metabolic intermediate were investigated to discuss the reason for propionate inhibition problem in anaerobic treatment. The hydraulic retention time (HRT) in the reactors started with 8.0h.The yield rate of biogas were 237ml/gCOD, 242ml/gCOD, 218ml/gCOD for acetate, ethanol and propionate, respectively when finishing start-up under OLR of 5.0 kgCOD/(m3·d) (HRT=9.6h).The HRT remained constant 9.6h,and the substrate concentration was gradually increased from 1,000 to 16,000mg/L as COD,and the organic loading rates(OLR) was from 3.0 to 40.0 kgCOD/(m3·d).The maximum propionate concentration was 41.6 gHPr-COD/L at the organic loading rate of 43.9 kgCOD/(m3·d) (HRT, 9.6h) as well as acetate and ethanol.

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Effect of organic loading rate on the performance of an up-flow anaerobic sludge blanket reactor treating olive mill effluent

Biotechnology and Bioprocess Engineering ◽

10.1007/s12257-008-0065-9 ◽

2009 ◽

Vol 14 (1) ◽

pp. 99-104 ◽

Cited By ~ 10

Author(s):

Nuri Azbar ◽

Fatih Tutuk ◽

Tugba Keskin

Keyword(s):

Loading Rate ◽

Organic Loading Rate ◽

Anaerobic Sludge ◽

Organic Loading ◽

Anaerobic Sludge Blanket ◽

Olive Mill

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Start-up and performance evaluation of upflow anaerobic sludge blanket reactor treating supernatant of hydrothermally treated municipal sludge: Effect of initial organic loading rate

Biochemical Engineering Journal ◽

10.1016/j.bej.2020.107843 ◽

2020 ◽

pp. 107843

Author(s):

Shan Liu ◽

Yongkang Wang ◽

Jianbin Guo ◽

Wei Wang ◽

Renjie Dong

Keyword(s):

Performance Evaluation ◽

Loading Rate ◽

Upflow Anaerobic Sludge Blanket ◽

Organic Loading Rate ◽

Anaerobic Sludge ◽

Municipal Sludge ◽

Organic Loading ◽

Start Up ◽

And Performance ◽

Anaerobic Sludge Blanket

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Treatment of Sago Wastewater using Hybrid Anaerobic Reactor

Water Quality Research Journal ◽

10.2166/wqrj.2006.006 ◽

2006 ◽

Vol 41 (1) ◽

pp. 56-62 ◽

Cited By ~ 15

Author(s):

J. Rajesh Banu ◽

Sudalyandi Kaliappan ◽

Dieter Beck

Keyword(s):

Loading Rate ◽

Low Cost ◽

High Strength ◽

Organic Loading Rate ◽

Hybrid Reactor ◽

Small Scale ◽

Anaerobic Sludge ◽

Organic Loading ◽

Volatile Solids ◽

Anaerobic Sludge Blanket

Abstract Sago, tapioca starch, is manufactured by over 800 small-scale units located in the Salem district of the State of Tamilnadu, South India. These units generate large quantities of high-strength wastewater requiring elaborate treatment prior to disposal. The present study is an attempt to treat the sago wastewater using a hybrid reactor, which combines the advantages of both fixed-film and up-flow anaerobic sludge blanket systems. A hybrid reactor with a volume of 5.9 L was operated at organic loading rates varying from 10.4 to 24.6 kg COD/m3d. After 120 d of start-up, an appreciable decrease in COD and efficient removal of solids were evident. The COD removal varied from 91 to 83%. While the removal of total solids was in the range of 56 to 63%, that of volatile solids varied from 67 to 72%. The methane production during the study period was in the range of 0.11 to 0.14 L CH4/g COD-d and the percentage was from 55 to 67%. The ideal organic loading rate (OLR) was determined on the basis of tolerance of the reactor towards higher organic loading rate and it was found to be 23.4 kg COD/m3d. The findings of the study open new possibilities for the design of low-cost and compact on-site treatment systems with very short retention periods.

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