摘要
研究了污泥间壁热干燥的工艺过程，分析了其工艺参数、冷凝水水质和产生的污染气体，探讨了有机物水解机理．结果表明，污泥含水率与停留时间呈负指数函数相关．收集到的干燥冷凝水属高浓度有机废水，其总有机碳（TOC）、挥发性有机酸（VFA）和氨氮（NH3-N）浓度均很高，pH值保持在9—9．5．干燥冷凝水中挥发性有机酸和氨氮来源于2部分：低温110—130℃时，主要发生蛋白质的水解，生成有机酸和氨氮；高温140—150℃时，主要发生脂肪类的水解，生成有机酸．干燥温度低于150℃时，污泥间壁热干燥过程无污染气体产生．
Technical parameter, condensed steam water quality and flue gases were studied and organic compound hydrolysis mechanism was discussed. During experimental study, observed that the relationship between water content of sewage sludge and residence time have a negative exponential function. The condensed steam water has a high-concentration organic content. Total organic carbon （TOC）, volatile fatty acid （VFA） and NH3-N of the water were very high and the pH value was between 9 and 9.5. VFA and NH3-N come from two sections： （1） In the 110 - 130 ℃ temperature range, hydrolysis of protein occurred with the formation of VFA and NH3-N; and （2） In the 140 - 150 ℃, fats hydrolyzed into VFA. There was no gaseous pollution produced in the whole experimental progress.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2007年第2期407-410,共4页
Environmental Science
基金
清华大学基础研究基金项目(JC2003010)
关键词
间壁热干燥
干燥冷凝水
水质分析
有机物水解机理
indirect thermal drying
condensed steam water
water quality analysis
organic compound hydrolysis mechanism
