Domestic sewage sludge treatment started later, of which there are also many problems, mainly in the following areas: 1, sludge treatment rate is low, the process is not perfect: there is a heavy wastewater treatment in our country, the tendency of light sludge treatment. In many cities, sludge disposal is not an essential part of a wastewater treatment plant. It is often a long period of time before a sewage treatment plant is completed and a sludge treatment system is built, resulting in a very low treatment rate of municipal wastewater in our country. Domestic municipal wastewater treatment plant sludge is very imperfect. Sludge after enrichment, digestion and drying and dehydration of the sewage treatment plant accounted for only 25.68% of the above urban sewage treatment plant. This shows that more than 70% of China's sewage treatment plant does not have a complete sludge treatment process. The sewage treatment plant without sludge stabilization accounts for 55.70% of the total. A large amount of sewage sludge that has not undergone stable treatment will cause serious secondary pollution to the environment. Sewage plants without sludge desiccation treatment account for about 48.65%. Sludge after concentration, digestion, there are about 95% to 97% moisture content, the volume is still large. Such a large volume of sludge without sludge drying dehydration, will bring many inconveniences for transport and follow-up disposal. 2, sludge treatment technology and equipment behind: At present, some of China's sewage treatment plant sludge treatment technology has been abandoned by developed countries technology, the level still remain in the developed countries in the 70,80 level, and some even Foreign 60's level. And some sludge treatment technology does not accord with domestic sewage sludge characteristics, the lack of the necessary technology for the investigation. Sludge treatment equipment is also relatively backward, poor performance, low efficiency, high energy consumption, less specialized equipment, failed to form a standardized and serialized. Therefore, limiting the improvement and development of sludge treatment technology in China. 3, low level of sludge treatment and management: many of the sludge treatment facilities have been built can not be normal operation, in addition to technical level, low management level is also an important factor. Most of the wastewater treatment plant managers and operators of poor quality, lack of management experience, can not effectively organize the production, coupled with less technical staff, not all supporting professional, so once the production problems, I do not know how to deal with, and some sewage Treatment plant sludge treatment system had long-term operation. Improve the management level of the sewage treatment plant and realize scientific management as soon as possible is the key to ensure the long-term operation of the sewage sludge system. 4, sludge treatment design is low: China's drainage has made great progress, has accumulated rich experience in sewage treatment design, and trained a large number of design talent. However, in terms of sludge treatment, our country still lacks practical experience and design experience. In particular, the overall level of the sludge treatment system is still relatively low. From the existing sludge treatment plants of sewage treatment plants, the operation conditions are not good and can not be To ensure long-term operation, many plant equipment is completed, but also a larger technological transformation, resulting in great waste of manpower, material and financial resources. 5. Sludge treatment investment is low: domestic sludge treatment investment accounts for only 20% ~ 50% of the total investment of sewage treatment plants, while sludge treatment investment in developed countries accounts for 50% ~ 70% of total investment. Led Headlamps,Led Headlight,Led Car Light,Best Led Headlamp Foshan Kobo Lighting CO.,LTD. , https://www.lightsattack.com
October 07, 2021