(作业)城市污泥的处理处置及资源化.doc

城市污泥的处理处置及资源化 摘要：城市污泥如果处理不当进入环境，会对周围环境造成一定的危害。污泥经过减容、稳定和无害化处理后，可以作为资源加以综合利用。当前国内外各污水处理厂传统的污泥处理方法主要有调理、浓缩、脱水、干燥、消化、堆肥等，这些方法在工程实践中不断的暴露出一些缺点和不足，于是又有一些新的污泥处理方法被应用到实践中，包括污泥湿式氧化法、蚯蚓处理污泥、膜生物反应器、污泥酸化、污泥人工湿地处理技术、污泥焚烧。污泥的处置方法主要有2种：卫生填埋、污泥投海。在污泥的资源化利用上，各种技术也得到大力的发展，有污泥发电、制作建材、污泥作吸附剂、土地利用与堆肥、低温热解、提取重金属、污泥制动物饲料、污泥制油、污泥作粘结剂等多种技术。防止了污泥的二次污染，也为污水处理厂解决污泥处理问题带来了可观的经济效益和社会效益。 关键词：城市污泥；处理处置；资源化 Sludge disposal and reutilization Abstract：If mishandled sewage sludge into the environment, can cause certain harm to the environment. Sludge after reducing capacity, stable and harmless handling, can be used as a comprehensive utilization of resources. The current domestic and foreign various sewage treatment plant sludge treatment methods mainly include traditional nursing, concentration, dehydration, drying, digestion, composting, etc., these methods in engineering practice constantly exposed some shortcomings and the insufficiency, and some new methods of sludge treatment is applied to the practice, including wet oxidation process, the earthworm treatment sludge, sludge membrane bioreactor, sludge acidification, sludge artificial wetland treatment, sludge incineration technology. Sludge disposal method mainly has two kinds: sanitary landfill, sludge to the sea. On the resource utilization of sludge, the development of various technologies have been vigorously, power generation and production of building materials with sludge, sludge adsorbent, land use, extraction of heavy metals, sludge and compost, under low temperature pyrolysis animal feed, as binder in fabrication of sludge oil, sludge and other technology. To prevent the secondary pollution of the sludge, and also for the sewage treatment plant sludge treatment solution has brought considerable economic benefits and social benefits. Keywords: Urban sludge；treatment disposal；Resource recovery 引言 随着我国经济的高速发展，城市化建设步伐的不断加快，环境污染日益严重。人们对环境质量的要求日益提高，环保意识 不断增强，环境保护与治理已成为国家可持续发展中 不可或缺的一个重要工作。城市中大量的污水处理厂建立起来，而污水处理过程中产生的大量污泥,其含水率高,还含有大量