不同有机质含量进泥的污泥干化芦苇床运行效能

发布时间：2018-08-18 13:50

【摘要】：污泥干化芦苇床是将人工湿地和污泥干化床进行有机结合,形成的一种新型污泥处理系统。系统运行时,周期性地将污泥布向湿地表面,水经填料层向下渗滤,并经由底部排水管流出;污泥中的固体物质被截留在填料层上面,通过蒸发蒸腾作用进一步脱水。通过系统地考察不同有机质含量剩余污泥在污泥干化芦苇床中的稳定化效果,总结并对比分析了污泥干化芦苇床对不同原泥的矿化程度、氮磷等营养物质的去除、微污染有机物的降解以及温室气体排放等。经过2年的布泥期和1年的稳定期,污泥有机质得到有效处理,高、低有机质含量污泥的稳定化程度分别达到54.50%和58.20%,满足GB 18918-2002中稳定化污泥标准的要求,同时高于GB 8712-1987(10%)的城镇垃圾农用控制标准要求。污泥氮磷含量仍然处于较高水平,可作为植物性营养元素;其中高、低有机质含量污泥中氮的含量分别从7.10%降到3.10%和从2.52%降到0.98%。微污染有机物如多环芳烃得到有效去除,高、低有机质含量污泥中多环芳烃分别去除了67.28%和32.64%,其中湿地植物芦苇起到了积极作用;监测结果表明,污泥干化芦苇床会释放一定量的温室气体,其中CO_2释放量为16.5~65.2 g·(m~2·d)~(-1),CH_4释放量为0.43~1.95 g·(m~2·d)~(-1),用CO_2来衡量CH_4的全球变暖趋势,污泥干化芦苇床CO_2释放量为15.02 g·(m~2·d)~(-1)。
[Abstract]:Sludge drying Reed bed is a new sludge treatment system which combines constructed wetland with sludge drying bed. When the system is running, the sludge is periodically distributed to the surface of the wetland, and the water leaches down through the packing layer and flows out through the bottom drain pipe; the solid material in the sludge is intercepted on the top of the packing layer and further dewatered by evaporation and transpiration. The stabilization effect of excess sludge with different organic matter content in sludge drying Reed bed was systematically investigated. The mineralization degree of different raw sludge and the removal of nitrogen and phosphorus in sludge drying Reed bed were summarized and compared. Degradation of micropolluted organic matter and greenhouse gas emission. After two years of sludge spreading period and one year of stable period, sludge organic matter was effectively treated, and the stabilization degree of sludge with high and low organic matter content reached 54.50% and 58.20% respectively, which met the requirements of GB 18918-2002 standard for stabilized sludge. At the same time, it is higher than GB 8712-1987 (10%). The content of nitrogen and phosphorus in sludge is still at a high level and can be used as a vegetative nutrient element, in which the content of nitrogen in sludge with high and low organic matter content decreases from 7.10% to 3.10% and from 2.52% to 0.98%, respectively. Polycyclic aromatic hydrocarbons (PAHs) were effectively removed from sludge with high and low organic matter contents, and PAHs were removed by 67.28% and 32.64% respectively, in which the wetland plant Reed played a positive role. Sludge drying Reed bed can release a certain amount of greenhouse gas, and the release of CO_2 is 16.5 ~ 65.2 g (m ~ 2 d) ~ (-1) ~ (-1) ~ (-1). The release of CO_2 from sludge drying Reed bed is 15.02 g (m ~ 2 d) ~ (-1) by using CO_2 to measure the global warming trend of CH_4, and the release of Ch _ 4 is 0.43 ~ 1.95 g (m ~ (2 d) ~ (-1) from sludge drying Reed bed.
【作者单位】：大连民族大学环境与资源学院;
【基金】：国家自然科学基金资助项目(51278088) 辽宁省科学事业公益研究基金项目(2014004006) 中央高校基本科研业务费专项(DC201502070203)
【分类号】：X703

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