人工湿地污泥处理技术研究进展

发布时间：2018-04-27 02:25

本文选题：人工湿地 + 芦苇床　；参考：《吉林农业大学学报》2017年01期

【摘要】：人工湿地污泥处理技术是利用植物、污泥微生物和自然力对活性污泥法处理城市污水的剩余污泥进行脱水与稳定。该技术具有运行费用低、不需要添加化学药剂、终产物可以安全处置或农用等优点。文中介绍了人工湿地污泥处理技术的概念、工作原理、脱水和稳定效果、温室气体排放以及设计和运行中常见的问题。在人工湿地处理污泥过程中,污泥脱水是由植物蒸发蒸腾、污泥渗滤和矿化作用协同完成的;污泥中有机质和氮磷等物质的转化和去除受进泥性质、运行参数和气象条件等因素影响较大。湿地植物芦苇能够保持足够的渗透系数并通过蒸腾作用去除污泥中的毛细水,在污泥脱水和污泥稳定中发挥着显著作用。由于人工湿地技术处理污泥工程实践时间相对较短,运行时通常出现一些问题,常见问题包括芦苇的长势不良、湿地中的液态厌氧污泥含水率过高、最后的稳定期污泥含水率过低等,需要在实践中予以解决。
[Abstract]:The technology of sludge treatment in constructed wetland is to dewatering and stabilizing the excess sludge of municipal sewage by using plant, sludge microorganism and natural force. The technology has the advantages of low operating cost, no need to add chemicals, and the final product can be safely disposed of or used in agriculture. This paper introduces the concept, working principle, dewatering and stabilization effect, greenhouse gas emission and common problems in design and operation of sludge treatment technology in constructed wetland. In the process of sludge treatment in constructed wetland, sludge dewatering is accomplished by plant evaporation and transpiration, sludge percolation and mineralization, and the conversion and removal of organic matter and nitrogen and phosphorus in sludge. The operation parameters and meteorological conditions have great influence. The wetland plant Reed can maintain sufficient osmotic coefficient and remove capillary water from sludge through transpiration which plays a significant role in sludge dewatering and sludge stabilization. Due to the relatively short practical time of sludge treatment by artificial wetland technology, there are usually some problems in operation, such as bad growth of Reed and high moisture content of liquid anaerobic sludge in wetland. The final stable period sludge moisture content is too low, need to be solved in practice.
【作者单位】：大连民族大学环境与资源学院;
【基金】：国家自然科学基金项目(51278088) 辽宁省科学事业公益研究基金(2014004006) 中央高校基本科研业务费专项(DC201502070203)
【分类号】：X703

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