摘要
本文报道用ＳＲ复合菌（ＳＲＩ－ＳＲＶ）治理超高浓度电镀铬废水的研究。ＳＲ菌从电镀淤泥中分离得到，能耐高浓度的铬并能高效还原Ｃｒ（Ⅵ）和吸附Ｃｒ（Ⅲ）。Ｃｒ（Ⅵ）被还原的速度很快，在混合反应充分的情况下５－２０ｍｉｎ可完成。研究了不同菌废比条件下ＳＲ菌对铬的吸附容量和去除率的变化，吸附容量随菌量的增加而下降，但去除率逐渐升高，存在一个最佳菌废比。在处理工艺中采用二级处理，第一级菌废比为４∶１，第二级０．５－１∶１。工艺流程为：功能菌在培菌池中生长至对数生长期与废水混合反应，经微孔ＰＥ过滤器过滤，铬被除去，废水被净化，水回用至培菌池使用，部分排放；污泥中Ｃｒ（Ⅲ）回收利用。
A microbial wastewater treatment process using a consortium of bacteria(SRI-SRⅤ) was designed and studied in the thesis. The SRB were isolated from electroplating sludge and could reduce and adsorb Cr(Ⅵ) efficiently. The adsorption capacity of the SRB decreased when the volume ratio of bacteria solution to wastewater increased and a optimum ratio could be defined. So when SRBs treating wastewater containing high Cr(Ⅵ) concentration, the reaction between SRB and water must be divided into two stages. The best ratio of SRB to wastewater in the first stage was 4∶1, in the second stage, 1∶1. In this process, SRB was incubated in a tank. When the biomass mixed with wastewater, Cr(Ⅵ) was reduced to Cr(Ⅲ) and was adsorbed on SRB cells. Then the water was filtered by a PE filter. The purified water can be reused and chromium in sludge can be recovered. This process had been running stably and efficiently for over eight months and proved to be a innovative technology with low capital investment, low operation cost, simple operation and maintenance.
出处
《水处理技术》
CAS
CSCD
北大核心
1996年第3期165-167,共3页
Technology of Water Treatment
基金
国家"八.五"科技攻关项目
