China Dry Net sludge is sludge produced by various separation methods in water supply and sewage treatment. A 400,000-ton/day municipal sewage treatment plant can produce 400 ton of municipal sludge containing 85% to 90% of water a day. Cities typically have two or three sewage treatment plants of similar size, producing 800 to 1,200 tons of water-containing sludge a day. More than 60 water treatment plants have been established in Shandong Province, with an annual discharge of 27 million tons of sludge. The water content of mechanical dewatered sludge produced by urban sewage treatment plants is generally about 80%. It also contains refractory organics, heavy metals and salts, as well as a small amount of pathogenic microorganisms and parasite eggs. The sludge can be treated without treatment. Emissions, these components will have adverse effects on the surrounding environment and even cause infectious diseases. The treatment and disposal of municipal sludge produced by a municipal wastewater treatment plant is one of the problems in the domestic and foreign environmental engineering community. The Shandong Provincial Tianli Drying Co., Ltd. led by Shandong University and China Everbright Water (Jinan) Co., Ltd. participated in the Shandong Provincial Provincial Environmental Protection Industry Technology R & D Special Fund Project - "The Municipal Sludge Cost Reduction Quantification and Resource Set Technology and "Equipment" based on the existing research and application of municipal sludge treatment and disposal technology, through the research and development of advanced sludge reduction technology research and development, sludge resource utilization technology research and development, the formation of municipal sludge low-cost reduction And complete sets of technologies and equipment to achieve effective treatment of sludge reduction, harmlessness, and resource utilization. The project was accepted and appraised by the Shandong Provincial Department of Environmental Protection in the Eastern District of the Shandong Academy of Sciences on January 29, 2013. This result can improve the low-cost treatment and disposal capacity of sludge in China and promote the sound development of China's sewage treatment plant. Sludge disposal and recycling process. The use of sludge sludge for low-cost reduction and resource-based complete set of technologies and equipment will lead to a multi-billion-dollar industry scale for the utilization of sludge resources, which will result in significant energy-saving and emission-reduction effects, and will help promote recycling. The economic development, environmental benefits, social benefits and economic benefits are obvious, forming an application model suitable for the low-cost reduction of sludge disposal in China and the realization of comprehensive utilization. In addition, the successful application of two wet sludge treatment and disposal demonstration projects in Weifang 400t/day in Shandong Weifang and 330t/day in Laiwu through the “Low Cost Reduction of Municipal Sludge and Recycling Technology and Equipment†proves that the cost of municipal sludge is low The successful development of reduction and resource-based complete sets of technologies and equipment has important social implications for the cost reduction of sludge disposal in China, the reliance on similar foreign equipment, and the improvement of the comprehensive international competitiveness of domestic technology and equipment.
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Shandong's "City Sludge Low-cost Reduction, Recycling Complete Technology and Equipment" Project Accepted Successfully