厌氧消化污泥生物干化技术及其产物评价  

Technology of Anaerobically Digested Sludge Biodrying and Evaluation of the Products

作　　者：王逸贤[1] Wang Yixian(Shanghai Municipal Engineering Design Institute （ Group） Co., Ltd.,Shanghai 200092, Chin)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海200092

出　　处：《净水技术》2017年第6期65-70,共6页Water Purification Technology

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07315-002-15)

摘　　要：研究了厌氧消化污泥的生物干化处理效果,进行了生物干化过程的热平衡计算,同时分析了生物干化产物特性及其资源化利用的可行性。将厌氧消化污泥与返混料和秸秆按一定比例混合后,经过18 d生物干化,物料含水率从63.1%降至40.3%,有机物含量从62.1%降至54.1%,堆体重量减少48.4%,减量化效果明显。水分蒸发消耗的热量占总热量的80%,有机物降解产生热量的利用效率较高。生物干化产物的有机质和养分含量较高,卫生状况良好,但EC值和种子发芽指数不满足我国园林绿化、农用和林地用的泥质要求,土地改良是较适宜的土地利用途径,也可进行焚烧、混合填埋或建材利用。Biodrying effect of anaerobically digested sludge was investigated, a n d h e a t b a l a n c i n g d u r i n g t h e p r o c e s s w a s c a l c u l a t e d . The characteristics of products and its feasibility of resource utilization were analyzed. After 18 days of biodrying,moisture content of the matrix decreased from 63.1% to 40.3%. And volatile solid content decreased from 62.1% to 54.1% with a certain proportion of anaerobically digested sludge, backmixing sludge and s t r a w . The weight（ wet basis） reduction r a t e o f t h e matrix was 48.4%,which showed a good reduction performance. The heat used for evaporation was 80% of the total heat consumption, indicating a high utilization efficiency of heat generated from organic degradation. The biodrying products had a high volatile solid and nutrient content, w h i l e electrical conductivity and seed germination index did not meet the requirements of sludge used in garden, a g r i c u l t u r e a n d forest. Therefore,land improvement is a suitable approach of land application for the products, while incineration, co-landfilling and building material application are other alternatives.

关 键 词：厌氧消化污泥 生物干化 热平衡 污泥减量化 资源化利用 

分 类 号：X703[环境科学与工程—环境工程]