Laboratory experiments were conducted to investigate the performance of an anaerobic sequencing batch reactor (ASBR) process for night soil treatment. Performances of the reactors were evaluated at an equivalent hydraulic retention time (HRT) of 10 days with an equivalent loading rate of 2.6 kgVS/m3/d (3.1 kgCOD/m3/day) at 35°C. Digestion of a night soil was possible using the ASBR at an HRT of 10 days in spite of high concentration of ammonia nitrogen and settleable solids. Solids were accumulated rapidly in the ASBRs, and their concentrations were 2.3∼2.4 times higher than that in a completely mixed control reactor. Remarkable increases in gas production were observed in the ASBRs compared with the control reactor. Average increases in equivalent daily gas production from the ASBRs were 205∼220% compared with that from the control run. The ASBR with reaction period/thickening period ratio (R/T ratio) of 1 showed a little higher gas production and organic removal efficiency than that with R/T ratio of 3. Volatile solids removals based on supernatant of the ASBRs were 12∼14% higher than that of the control reactor. Thus, the ASBR was a stable and effective process for the treatment of night soil having high concentration of settleable organics and ammonia nitrogen.
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Research Article|
January 01 2001
Performance characterization of anaerobic sequencing batch reactor process for digestion of night soil
J. G. Lee;
J. G. Lee
1Dept. of Environmental Management, An-Dong Science College, San 89 Kyo-Ri, Seohu-Meun, Andong-City, Kyongbuk 762-820, Korea
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J. M. Hur;
J. M. Hur
2New Environment Research Engineering Co., Ewha B/D 601, 8-21 Yangjae-Dong, Seocho-Gu, Seoul 137-730, Korea (Tel : +81-2-571-1153 Fax: +82-2-576-2889)
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D. Chang;
D. Chang
3Dept. of Environmental Engineering, KonKuk University, 93-1 Mojin-Dong Kwangjin-Gu,Seoul 143-701, Korea (Tel : +82-2-450-3545 Fax : +82-2-454-0428)
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T. H. Chung
T. H. Chung
4Dept. of Urban & Geosystem Engineering, College of Engineering, Seoul National University, 56 Shinrim-Dong, Kwanak-Gu, Seoul 151-742, Korea
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Water Sci Technol (2001) 43 (1): 27–34.
Citation
J. G. Lee, J. M. Hur, D. Chang, T. H. Chung; Performance characterization of anaerobic sequencing batch reactor process for digestion of night soil. Water Sci Technol 1 January 2001; 43 (1): 27–34. doi: https://doi.org/10.2166/wst.2001.0007
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