污水污泥送火力发电厂焚烧的环境风险研究进展

污泥焚烧工艺的应用已经有几十年的历史,但在火力发电厂内焚烧污水污泥近年来才得到较多关注。由于污水污泥送火力发电厂焚烧对于水务和电力部门是双赢的,积极探索这个途径的可行性,控制可能出现的环境风险,有利于污水污泥处置的可持续性发展。对污水污泥和煤的成分进行比较,并对国内外研究者的相关研究成果以及相关法规进行了综合分析,就火力发电厂内焚烧污水污泥在我国推广提出一些建议。

Research on Dynamics Design for Active Sludge System

In order to describe the relationship between dynamic process and sludge removing load in active sludge system, a new method for designing the volume of aeration tanks was put forward based on the Michaelis and Menten equation. the influence of sludge returning was considered in the design. The result shows that the parameter of sludge reflux ratio plays a very important role in the design of active sludge system. In some given conditions,there exists an optimum reflux ratio which can make the volume of aeration tank be the minimum.