文献类型：期刊文献

英文题名：Chemical industrial wastewater treated by combined biological and chemical oxidation process

作者：Cao Guomin[1];Yang Guoping[1];Sheng Mei[1];Wang Yongjian[1]

机构：[1]E China Univ Sci & Technol, Res Inst Environm Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：59

期号：5

起止页码：1019

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20091712045798);WOS:【SCI-EXPANDED(收录号:WOS:000264598100021)】；

语种：英文

外文关键词：chemical wastewater; combined biological and chemical oxidation process; Fenton reagent

摘要：Wastewaters from phenol and rubber synthesis were treated by the activated sludge process in a large-scale chemical factory in Shanghai, but the final effluent quality cannot conform with the local discharge limit without using river water for dilution. Therefore, this chemical factory had to upgrade its wastewater treatment plant. To fully use the present buildings and equipment during upgrading of the chemical factory's wastewater treatment plant and to save operation costs, a sequential biological pre-treatement, chemical oxidation, and biological post-treatment (or BCB for short) process had been proposed and investigated in a pilot trial. The pilot trial results showed that about 80% COD in the chemical wastewater could be removed through anoxic and aerobic degradation in the biological pre-treatement section, and the residual COD in the effluent of the biological pre-treatment section belongs to refractory chemicals which cannot be removed by the normal biological process. The refractory chemicals were partial oxidized using Fenton's reagent in the chemical oxidation section to improve their biodegradability; subsequently the wastewater was treated by the SBR process in the biological post-treatment section. The final effluent COD reached the first grade discharge limit (< 100mg l(-1)) of Chinese Notational Integrated Wastewater Discharge Standard (GB8978-1996) even if without using any dilution water. Compared with the original dilution and biological process, the operation cost of the BCB process increased by about 0.5 yuan (RMB) per cubic metre wastewater, but about 1,240,000 m(3) a(-1) dilution water could be saved and the COD emission could be cut down by 112 tonne each year.