Browse > Article

Effect of Gamma Irradiation on Physico-Chemical Characteristics and Ultimate Anaerobic Biodegradability of Sewage Sludge  

Kang, Ho (Dept. of Environmental Engineering, Chungnam National University)
Na, Eun Kyoung (Dept. of Environmental Engineering, Chungnam National University)
Lee, Myun Joo (Korea Atomic Energy Research Institute)
Publication Information
Journal of Korean Society on Water Environment / v.20, no.4, 2004 , pp. 327-332 More about this Journal
Abstract
This study was carried out to examine the effect of gamma irradiation on the physico-chemical characteristics and ultimate anaerobic biodegradability of sewage sludge. The results found that the solubilization rates of SCOD in wasted activated sludge(WAS) and thickened sludge(T-S) with gamma irradiation of 3kGy were 8 times and 7 times greater than these of the raw WAS and T-S without the irradiation, respectively; each soluble concentration protein were 4 times and 3 times greater than these of the raw WAS and T-S; each soluble carbohydrate concentration was 8 times and 6 times greater than these of the raw WAS and T-S. The ultimate anaerobic biodegradabilities of WAS and T-S with gamma irradiation were 51 % and 50%, which corresponds to each 8% and 10% greater than these of the raw sludges. Approximately 83% and 81% of the each biodegradable substrates in the irradiated WAS and the T-S were degraded within 11 days with the first order decay rate coefficients, $k_1$ that ranged $0.143{\sim}0.164day^{-1}$ for WAS and $0.134{\sim}0.152day^{-1}$ for T-S. Based on the results, it can be concluded that when irradiated with gamma the solubilization of sewage sludge greatly increases resulting in substrates suitable for the subsequent biological treatment processes.
Keywords
Gamma irradiation; Sewage sludge; Solubilization; Ultimate anaerobic biodegradability; First order decay rate;
Citations & Related Records
연도 인용수 순위
  • Reference
1 신경숙, 하수슬러지의 효율적인 처리를 위한 전자빔 응용, 충남대학교 박사학위 논문 (2003)
2 H. Kang., P. Weiland., Ultimate anaerobic biodegradability of some agro-industrial residues, Bioresource Technology, 43, pp. 107-111 (1993)
3 이상석 외 3인, 방사선생물학, 정문각, pp. 25-38 (1994)
4 Jewell, W.J., Cummings, R.J., Richards, B.K. & Herndon, F., Engineering design considerations for methane fermentation of energy crops, Annual report to Gas Research Institute, Chicago, U.S.A. (1997)
5 문서연, Anaerobic Filter 를 이용한 축산폐수의 전처리 특성연구, 충남대학교 대학원 석사학위 논문 (2001)
6 김석구, 송호연, Saburo Matsui, Anaerobic Degradation of Selected Lignocellulosic Materials using Modified BMP Assays, 대한환경공학회지, 20(10), pp. 1413-1424 (1998)