Sludge is an inevitable product in the treatment process of municipal sewage treatment plant. China's annual output of concentrated sludge (calculated by 98% moisture content) has reached more than 300 million tons. Sludge dewatering is an important link in sludge treatment and disposal, which can effectively reduce the volume of sludge and reduce the cost of subsequent transportation, treatment and disposal of sludge. Usually, the sludge is mechanically dehydrated to reduce the moisture content. However, because there are a lot of hydrophilic substances in the sludge, and the water content is high, it is very difficult to dehydrate it directly. Therefore, it is generally necessary to take pre-treatment measures before sludge dehydration and adjust the dehydration performance of the sludge in order to carry out effective dehydration. How to solve the problem of high moisture content of sludge.

At present, the methods of sludge dewatering and conditioning in municipal sewage treatment plants mainly include physical conditioning, chemical conditioning, flocculation conditioning, etc., in order to improve the dewatering performance of sludge. However, there are still some shortcomings in the practical application of the above methods: physical conditioning is generally energy-consuming, and the sludge dewatering solution after conditioning contains a large amount of chemical oxygen demand (COD) and ammonia nitrogen, which increases the burden of sludge treatment. Dehydration fluid; Although chemical conditioning can significantly improve the dewatering performance of the sludge, the introduction of a large number of inorganic substances will reduce the content of organic matter in the sludge, which is not conducive to the later resource utilization of the sludge, and easily cause potential secondary pollution to the environment. Although the development prospect of flocculation conditioning technology is broad, there are problems such as large dosage of flocculant and high cost, which seriously restricts the large-scale production of flocculant and greatly limits its extensive industrial application.

Sludge conditioner is a kind of chemical agent which can change the surface structure of sludge, reduce the solid surface load of sludge, reduce the specific surface area of sludge and destroy the surface structure of sludge. Bacterial structure. The main components of sludge conditioner are inorganic compounds, sludge surface structure modifier, degreaser, wall breaking agent, sludge surface treatment agent, sludge stripping agent, etc. Combined with the plate and frame type mud press, the moisture content of the sludge can be greater than 90% ~ 40%-60%, and the sludge reduction can be fully realized.

Sludge conditioner has a significant effect on improving the dewatering performance of residual sludge. The use of sludge conditioner can effectively reduce the water in the sludge to 40%-60%, release the water in the sludge, and greatly improve the dewatering performance of the sludge. The application process is simple and the conditions are easy to control, which can realize the large-scale treatment of sludge dewatering and conditioning.