生物法实现污泥减量技术综述

Review on Using Biological Methods to Minimize Sludge Reduction

由于受到经济、环境和社会的压力,剩余污泥的处置方式受到限制,而且处置成本已占污水处理最成本的50%～60%,可以说传统的方法将水污染问题转化为固废处置的问题。因此,开发污泥减量技术意义重大。现行的污泥减量技术主要包括物理、化学和生物方法。其中,生物法具有高效、低沉本、无二次污染等优点而广受关注。本文着重阐述了利用几种生物法污泥减量化技术,包括嗜热酶溶解技术、投加生物制剂和生物扑食污泥减量技术。初步阐述了这些技术的基本原理,总结了其研究现状和各种技术的优缺点。

The treatment and disposal of excess sludge represented a bottleneck in wastewater treatment plants（WWTP） worldwide,due to environmental,economic,social and legal factors.Cost of sludge disposal accounted for 50%～60% of total wastewater treatment,so water pollution control was converted to waste solid treatment.Therefore,it was very meaningful to develop sludge minimization technologies.In comparison to physical and chemical ways,biological method was more attractive,because it was more effective,low-cost and pollution-free.So the sludge reduction using biological ways were discussed,including S-ET,addition of biological preparations,using predation of aquatic worms to reduce excess sludge（suspended worms,immobilized worms）.Moreover,the basic theories,research progress and advantages and disadvantages of each technology were also discussed.