The government attaches great importance to Sludge Treatment issues

In recent years, with the development of environmental supervision and inspection, the issue of sludge in urban sewage treatment plants has been highly valued by relevant national ministries and industries.

Influent water quality and sludge treatment and disposal are important factors that affect the stable operation of urban sewage treatment plants in China. However, for a long time, sewage plants have always had the problem of heavy water and light sludge, and the stabilization of sludge has not been solved. The sludge treatment and disposal is not timely and scientific, and even lacks an effective final destination of the sludge, which leads to the excessive accumulation of sludge in the system and the risk of secondary pollution to the environment.

At present, the scale of urban sewage treatment in China has reached 220 million tons per day, and the annual production of wet sludge with a moisture content of 80% exceeds 60 million tons. It is estimated that by 2025, the annual output of sludge in my country will exceed 100 million tons, and sludge treatment and disposal has become a shortcoming that hinders the field of urban sewage treatment. Finding a suitable outlet for sludge treatment has become an urgent problem to be solved.

At the national level, organize forces to conduct special investigations on sludge treatment and disposal, conduct a comprehensive assessment of the actual effect, existing and potential risks of sludge treatment and disposal, improve sludge treatment and disposal standards, optimize technical routes suitable for my country's national conditions, and prevent sludge co-processing The transfer of pollutants between gas and solid phases (slag) during disposal. Reasonably study the effective destination of sludge recycling, break down industry barriers, formulate national standards for sludge recycling, and force urban sewage treatment plants to enter water with standards (related industrial waste water that hinders recycling of sludge is not allowed to enter), and also Taking this opportunity to carry out pollution source traceability work based on characteristic factors in sludge, effectively promote the high-quality operation of urban sewage treatment plants in my country. Environmental supervision and inspection at all levels shall clarify the specific content and standards of sludge treatment and disposal supervision and inspection as mandatory and key items.