DocumentCode :
3102263
Title :
Quick Startup of EGSB Reactor Seeded with Anaerobic Digestion Sludge for the Treatment of Actual Domestic Sewage under Ambient Temperature
Author :
Dong Chunjuan ; Li Qingwei ; Geng Zhaoyu ; Wang Haihui ; Wang Zengzhang
Author_Institution :
Dept. of Environ. Eng., Taiyuan Univ., Taiyuan, China
fYear :
2010
fDate :
18-20 June 2010
Firstpage :
1
Lastpage :
3
Abstract :
To obtain the rapid startup of EGSB reactor seeded with anaerobic digestion sludge for the treatment of actual domestic wastewater under ambient temperature, two startup methods i.e. A and B were tried out at 25°C. For method A, reactor A (RA) was fed with brewery wastewater to incubate granular sludge and then treated domestic sewage, for method B, reactor B (RB) was fed with sanitary waste directly to bring up granular sludge. In RA, superficial flow rate of 2.9m·h-1 was employed to offer a suitable hydraulic condition. Primary HRT and OLR were set at 4h and 2.5-5.1kgCOD·m-3·d-1, respectively to select the predominant groups, and then by stepwise shortening HRT and increasing OLR, granulation completed within 46 days namely granules with diameter more than 0.45mm accounted for 86%. During this stage, more than 90% COD was removed even at OLR of 19.1 kgCOD·m-3·d-1. Then fed with domestic wastewater, about 80% COD removal was obtained after 15 days which meant a successful startup. For RB, superficial flow rate was set at 2.7·h-1, and HRT of 1.2h-1.5h was used to increase the OLR of low strength domestic wastewater (149-615mg·l-1) to stimulate the microbial activity. Granulation was accomplished within 60 days, although granules with diameter larger than 0.45mm only took up 57%. At this time, COD removal was above 60% regardless influent fluctuate, which meant the successful startup. Compared with the inoculum, the specific methanogenic activity of RA and RB were increased from the original 0.22gCODCH4·gVSS-1·d-1 to 0.75 gCODCHgVSS-1·d-1 and 0.58 gCODCH4·gVSS-1·d-1, respectively. The experimental result showed that both methods could start up successfully within two months. Neverth- - eless, granulation could be accelerated and higher activity of granular sludge could be obtained through method A so as to treat domestic sewage efficiently and stably in a short stage.
Keywords :
breweries; sewage treatment; sludge treatment; EGSB reactor; HRT; OLR; ambient temperature; anaerobic digestion sludge; brewery wastewater; domestic sewage treatment; granular sludge; granulation; sanitary waste; time 1.2 h to 15 day; Acceleration; Biomass; Chemical industry; Chemical technology; Educational institutions; Environmental factors; Inductors; Sludge treatment; Temperature; Wastewater treatment;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on
Conference_Location :
Chengdu
ISSN :
2151-7614
Print_ISBN :
978-1-4244-4712-1
Electronic_ISBN :
2151-7614
Type :
conf
DOI :
10.1109/ICBBE.2010.5515567
Filename :
5515567
Link To Document :
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