The effect of hydraulic retention time on granular sludge biomass in treating textile wastewater

To accomplish rapidly the granulation process of digestion sludge for the treatment of actual coking wastewater and meanwhile achieve high COD, phenol, SCN- and CN- removal, the EGSB reactor was employed with two operation stages. StageI: Granular sludge was formed from digestion sludge using brewery wastewater as substrate in the anaerobic way (meanwhile adding little granules, which were 1/7 of the total biomass). StageII: Granular sludge was acclimatized with the actual coking wastewater through continuous micro-oxygenation way. The experimental results showed that the granular sludge could quickly form in 10d in the EGSB reactor seeded with digestion sludge and little loose granules. It took only about 6 months for the successful micro-aerobic acclimating of the granular sludge by the actual coking wastewater. The removal efficiencies of COD, phenol, SCN- and CN- were 72.9, 99.5, 95.7 and 97.5%, respectively, at 12.1h hydraulic retention time (HRT) and for 631-922, 12.8-37.7, 66.7-232.7 and 0.3-57.8mg.L-1 influent COD, phenol, SCN- and CN- concentration.

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Effect of mixed liquor volatile suspended solids (MLVSS) and hydraulic retention time (HRT) on the performance of activated sludge process during the biotreatment of real textile wastewater

Water Resources and Industry ◽

10.1016/j.wri.2014.01.001 ◽

2014 ◽

Vol 5 ◽

pp. 1-8 ◽

Cited By ~ 21

Author(s):

Kapil Kumar ◽

Gaurav Kumar Singh ◽

M.G. Dastidar ◽

T.R. Sreekrishnan

Keyword(s):

Activated Sludge ◽

Retention Time ◽

Suspended Solids ◽

Hydraulic Retention Time ◽

Textile Wastewater ◽

Activated Sludge Process ◽

Mixed Liquor

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Influence of cosubstrate and hydraulic retention time on the removal of drugs and hygiene products in sanitary sewage in an anaerobic Expanded Granular Sludge Bed reactor

Journal of Environmental Management ◽

10.1016/j.jenvman.2021.113532 ◽

2021 ◽

Vol 299 ◽

pp. 113532

Author(s):

Caroline F. Granatto ◽

Guilherme M. Grosseli ◽

Isabel K. Sakamoto ◽

Pedro S. Fadini ◽

Maria Bernadete A. Varesche

Keyword(s):

Retention Time ◽

Hydraulic Retention Time ◽

Granular Sludge

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Impact of hydraulic retention time on swine wastewater treatment by aerobic granular sludge sequencing batch reactor

Environmental Science and Pollution Research ◽

10.1007/s11356-020-10922-w ◽

2020 ◽

Author(s):

Xiaochun Wang ◽

Ji Li ◽

Xiaolei Zhang ◽

Zhonglin Chen ◽

Jimin Shen ◽

...

Keyword(s):

Wastewater Treatment ◽

Retention Time ◽

Sequencing Batch Reactor ◽

Hydraulic Retention Time ◽

Batch Reactor ◽

Granular Sludge ◽

Swine Wastewater ◽

Aerobic Granular Sludge

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Thermophilic treatment by anaerobic granular sludge as an effective approach to accelerate the electron transfer and improve the reductive decolorization of azo dyes in bioreactors

Water Science & Technology ◽

10.2166/wst.2005.0540 ◽

2005 ◽

Vol 52 (1-2) ◽

pp. 363-369 ◽

Cited By ~ 4

Author(s):

A.B. dos Santos ◽

J. Traverse ◽

F.J. Cervantes ◽

J.B. van Lier

Keyword(s):

Electron Transfer ◽

Hydraulic Retention Time ◽

Granular Sludge ◽

Textile Wastewater ◽

Anaerobic Treatment ◽

Significant Difference ◽

Dye Reduction ◽

Effects Of Temperature ◽

Reductive Decolorization ◽

Electron Transfer Capacity

The effects of temperature, hydraulic retention time (HRT), and the redox mediator, anthraquinone-2,6-disulfonate (AQDS), on electron transfer and subsequent reductive decolorization of dyes from textile wastewater was assessed in mesophilic and thermophilic anaerobic bioreactors. The results clearly show that compared to mesophilic anaerobic treatment, thermophilic treatment at 55 °C is an effective approach for increasing the electron transfer capacity in bioreactors, and thus improving the decolorization rates. At an HRT of 2.5 h and in the absence of AQDS, the color removal was 5.3-fold higher at 55 °C compared to 30 °C. Furthermore, similar decolorizations were found at 55 °C between the AQDS-free and AQDS-supplemented reactors, whereas a significant difference (up to 3.6-fold) on dye reduction occurred at 30 °C.

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Influence of hydraulic retention time on partial nitrification of continuous-flow aerobic granular-sludge reactor

Environmental Technology ◽

10.1080/09593330.2014.881423 ◽

2014 ◽

Vol 35 (14) ◽

pp. 1760-1765 ◽

Cited By ~ 8

Author(s):

Chunli Wan ◽

Xue Yang ◽

Duu-Jong Lee ◽

Supu Sun ◽

Xiang Liu ◽

...

Keyword(s):

Retention Time ◽

Continuous Flow ◽

Hydraulic Retention Time ◽

Granular Sludge ◽

Partial Nitrification ◽

Aerobic Granular Sludge

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Hydraulic retention time influence on azo dye and sulfate removal during the sequential anaerobic–aerobic treatment of real textile wastewater

Water Science & Technology ◽

10.2166/wst.2017.378 ◽

2017 ◽

Vol 76 (12) ◽

pp. 3319-3327 ◽

Cited By ~ 4

Author(s):

F. M. Amaral ◽

L. Florêncio ◽

M. T. Kato ◽

P. A. Santa-Cruz ◽

S. Gavazza

Keyword(s):

Retention Time ◽

Azo Dye ◽

Hydraulic Retention Time ◽

Dye Degradation ◽

Textile Wastewater ◽

Pilot Scale ◽

Sulfate Removal ◽

Aerobic Reactor ◽

Removal Processes ◽

Textile Wastewater Treatment

Abstract In the present study, we evaluate the behavior of real textile wastewater treatment using a system composed of two sequential pilot-scale reactors (anaerobic followed by aerobic) during 622 days. The work focused on the competition between color and sulfate removal processes, when the hydraulic retention time (HRT) was increased in the anaerobic/aerobic reactors from 16/12 hours in phase I (PI) to 4/3 days in phase II (PII). The organic matter was successfully removed in both phases through the system, and the highest efficiency (75%) was achieved in PII. The increase in the HRT did not improve azo dye degradation under anaerobic conditions. Instead, it favored sulfate reduction, which removal efficiency increased from 26% in PI to 75% in PII. Aromatic amines were detected in the anaerobic reactor effluent and removed in the aerobic reactor.

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