Sugarcane molasses-based bio-ethanol wastewater treatment by two-phase multi-staged up-flow anaerobic sludge blanket (UASB) combination with up-flow UASB and down-flow hanging sponge

被引：9

作者：

Choeisai, P. ^{[1
]}

Jitkam, N. ^{[1
]}

Silapanoraset, K. ^{[1
]}

Yubolsai, C. ^{[1
]}

Yoochatchaval, W. ^{[2
]}

Yamaguchi, T. ^{[3
]}

Onodera, T. ^{[4
]}

Syutsubo, K. ^{[4
]}

机构：

[1] Khon Kaen Univ, Fac Engn, Dept Environm Engn, Khon Kaen 40002, Thailand

[2] King Mongkuts Univ Technol Thonburi, Fac Engn, Dept Environm Engn, Bangkok 10140, Thailand

[3] Nagaoka Univ Technol, Dept Environm Syst Engn, Nagaoka, Niigata 9402188, Japan

[4] Natl Inst Environm Studies, Ctr Reg Environm Res, Tsukuba, Ibaraki 3058506, Japan

来源：

WATER SCIENCE AND TECHNOLOGY | 2014年 / 69卷 / 06期

关键词：

bio-ethanoldistillery; MS-UASB; sugarcane molasses; UASB&DHS; vinasse; DIGESTION PROCESS; TREATMENT SYSTEM; REACTOR; INHIBITION;

D O I：

10.2166/wst.2013.794

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study was designed to evaluate a treatment system for high strength wastewater (vinasse) from a sugarcane molasses-based bio-ethanol plant in Thailand. A laboratory-scale two-phase treatment system composed of a sulfate reducing (SR) tank and multi-staged up-flow anaerobic sludge blanket (MS-UASB) reactor was used as the pre-treatment unit. Conventional UASB and down-flow hanging sponge (DHS) reactors were used as the post-treatment unit. The treatment system was operated for 300 days under ambient temperature conditions (24.6-29.6 degrees C). The hydraulic retention time (HRT) in each unit was kept at 25 h for the two-phase system and 23 h for the UASB&DHS. The influent concentration was allowed to reach up to 15,000 mg chemical oxygen demand (COD)/L. COD removal efficiency (based on influent COD) of the two-phase MS-UASB and the UASB&DHS was 54.9 and 18.7%, respectively. Due to the effective removal of sulfide in the SR tank, the MS-UASB achieved a high methane conversion ratio of up to 97%. In DHS, nitrification occurred at the outside portion of the sponge media while denitrification occurred at the inside. Consequently, 27% of the total nitrogen (TN) was removed. An amount of 32% of residual nitrogen (28 mgN/L) was in the form of nitrate, a better nitrogen state for fertilizer.

引用

页码：1174 / 1180

页数：7

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