固定化细胞处理难降解有机废水

REFRACTORY ORGANIC WASTEWATER TREATMENT BYUSING IMMOBILIZED MICROBIAL CELLS

本文首先对琼脂、明胶、海藻酸钙、聚乙烯酰和丙烯醇铵5种固定化细胞载体的性能进行了比较,然后用固定化细胞分别对含难降解有机成份的洗衣粉废水和四环素废水进行了处理试验.结果表明,聚乙烯醇凝胶是其中较为合适的固定化细胞载体;洗衣粉废水中的LAS浓度为40mg/L～70mg/L时,3h内LAS可降解90%以上;在固定化细胞作为产甲烷相的二相厌氧工艺中,产酸相和产甲烷相停留时间分别为3h和24h时,四环素废水的COD去除率可达73%左右.

In this paper, characteristics of five kinds of gels,namely,agar,gelatine, calcium alginate, polyvinyl alcohol and acrylamide used as entrapping agents to produce immobilized microbial beads were firstly studied, then detergent wastewater and tetracycline wastewater containing refractory organic component were treated respectively by using immobilized superior microorganism beads. It was found that the polyvinyl alcohol gel was the most suitable entrapping agent, when LAS concentration in the detergent wastewater was from 40 mg/1 to 70 mg/1, the rate of LAS removed exceeded 90% in 3hrs, and in the two-phase anaerobic treatment process of tetracycline wastewater where immobilized microbial beads were used as the methane phase, when HRT of the acid phase and the methane phase were 3 hrs and 24 hrs respectively,COD removal efficiency was about 73%.