通风强度对市政污泥生物干化中试效果的影响  

Influence of Air Flux on Municipal Sludge Biodrying in a Pilot Scale Test

作　　者：张喻[1] 韩融[1] 陆文静[1] 王洪涛[1] 明中远 王强 夏伟 

机构地区：[1]清华大学环境学院,北京100084 [2]江苏田娘农业科技有限公司,常熟215532

出　　处：《环境科学》2015年第5期1727-1732,共6页Environmental Science

基　　金：国家水体污染控制与治理科技重大专项(201209022)

摘　　要：将污泥与树皮按照一定比例混合,利用自主研制的滚筒式污泥生物干化中试系统进行实验,通过对温度、含水率、O2和CO2浓度、挥发性固体(VS)、p H等参数的检测,研究了通风强度对市政污泥生物干化效果的影响.结果表明,通风强度对污泥生物干化有较大影响,通风强度(以VS计)为120 L·(h·kg)-1时,最高温度达到66℃,55℃以上高温可以维持40 h以上,111 h后污泥最终含水率可以降低至56%;生物干化过程中p H始终保持在6.5~8.5之间,不会影响微生物生命活动;滚筒式污泥生物干化反应器能够使反应器内基质均一性良好,对利用滚筒式反应器实现污泥连续流处理提供参考.A drum-type biodrying pilot scale test system was made to treat the municipal sludge. Sludge was mixed with barks according to certain proportion, and was used to study the influence of air flux on municipal sludge biodrying through parameter detection, such as temperature, moisture content, pH and volatile solid (VS). Results showed that air flux had a great influence on the effect of biodrying. When the air flux was 120 L?(h?kg) - 1 , the best result was obtained, the highest sludge temperature was 66℃and the temperature could remain upon 55℃ for more than 40 h. After 111 h, the moisture content reduced to 56% . The pH remained at 6. 5-8. 5 through the whole biodrying process. As a result, the microorganism activities would not be affected. The sludge inside the drum-type biodrying system was homogeneous. This research provides a reference about sludge treatment using a continues flow process by drum-type biodrying system.

关 键 词：通风强度 污泥 滚筒 生物干化 中试 

分 类 号：X703[环境科学与工程—环境工程]