Qinhuangdao city lvgang sludge treatment plant in Qinhuangdao City, the city concentrated sludge treatment center, on the treatment of city sludge moisture content of 80% to 200 tons; the completion of civil engineering in 2009 February, began trial operation in May. Qinhuangdao sludge treatment project adopts intelligent control bio composting international advanced (second generation CTB), after the sludge harmless treatment will be used as needed for plant growth nutrient soil or organic fertilizer; the project has the advantages of low energy consumption, high degree of automation, composting fermentation cycle is short, with the characteristics of small size, composting process the product quality is stable, compost and compost plant no odor emission etc..

　　Project overview：

　　Qinhuangdao city lvgang sludge treatment plant is located in Qinhuangdao Harbor District Ma Nian Zhuang North, a total investment of 53000000 yuan, designed daily processing 200 tons of municipal sludge. The sludge project in 2009 civil works completed in February, began trial operation in May. Qinhuangdao sludge treatment project adopts intelligent control bio composting international advanced (second generation CTB), after the sludge harmless treatment will be used as needed for plant growth nutrient soil or organic fertilizer. The project has the characteristics of low energy consumption, high degree of automation, composting cycle short, small area, composting and compost compost plant product quality is stable, no stench gas emissions.

　　Technological process：

　　The project uses the CTB high temperature aerobic fermentation process, see figure 2. The dewatered sludge transported into the plant and organic conditioner, dry backfill mix, adjust the material moisture, porosity, C/N and other parameters to the proper scope, mix the material into a fermentation bin, and then insert the temperature probe and oxygen probe into the reactor body, start the fermentation process, main fermentation process according to temperature, oxygen probe the data from the Compsoft3.0 control software, the blower on the pile of oxygen, were evenly over ripening and after ripening of stabilization, eliminate the dead area of fermentation. After fermentation, material screening, the objects on the screen as the back filling into the next cycle, undersize product nutrition soil sinotrans. The fermentation process will produce a small amount of NH3, in order to ensure the operation of health personnel, a waste gas collecting system of fermentation workshop, collection of exhaust gas by biological aerated filter after discharge.