The Research Of The Technique For Dry Up The Sludge Combined With The Technique For Urban Sludge Composting

With the development of industry and the increase of population, the output of wastewater and sewage sludge has been increasing greatly. The sewage sludge is the by-product of wastewater treatment plants. Treatment and disposal of the sludge has become a question of world wild concern in order to minimize its harm and to make effective use of it. The current situation s of disposal and utilization of sludge (land fill, oceanic jettison, incineration, and fertilization etc) were introduced and compared. In conclusion, fertilization will be a new way to utilize the wastewater sludge for practical purposes in China in the future.China is an agricultural country of numerous populations. Urban sludge disposal is a method that is suited to domestic conditions. This method not only settles pollution but also organic manure of agriculture. Therefore, this paper study the process of urban sludge composting and two mainly equipments of part dryer and composting.1.By study the relations between energy of dry sludge and the rate of water content, the author puts forward the process that is the sludge part dry up combined with the technology of high temperature oxidation composting fermentation. Using the low energy consumption in process of part dry, the sludge rates of water content is from 80% to 60%, and meantime the volume is decrease a half and floor areas is decrease. Sludge water content 60% mixture with fungus and dry sludge into the rate of water content50-55%. This sludge is site high temperature oxidation composting fermentation, The technology have some specially feature: low energy consumption, secure, small floor area, low cost, high automatic and extensive scope of application.2.Study the equipments of the technology part dry, the process adopt the technology of indirect dry up .The plan is deigned in raise control levels and automatic .It is studied that is equipment parameter of, temperature, pressure, oxygen content and dustiness, monitor and control technology is realized, Secure and reliance. Meantime, the designed that is the control time matched optimum the dewater rate, products outlet speed, dry temperature, dry time, abrasion resistance and resistance to corrosion for equipment.3.Dedin and study the equipment for the technology of sludge part dry up combined with the oxidation fermentation. That of chain plough equipment, thismachine have many functions of delivery, mixture, pludge, It is studied that machine between pledge speed and running speed, abrasion resistance and resistance to corrosion and automatic.4.This technology is applied in Tan Shan xi jiao swage sludge treatment plant .It yields good results.Sum up ,the technology of sludge part dry up machine with high temperature oxidation fermentation realize energy saving ,high coefficient, automation .The new technology is chain pludge machine that have pludge , delivery, sparse together .This paper offer new process and meantime for urban sludge composting ,The research of this technology have economic results and society benefit.