There is sewage means there is sludge. With the increasing expansion of sewage treatment scale in recent years, as well as the improvement of treatment level and technology, the product of sewage treatment-the volume of sludge has also become larger and larger.　　
 
According to China Environmental Protection Online, for a long time in the past, most sewage treatment plants in my country valued sewage and despised sludge. After the sewage was treated, more than 80% of the sludge was dumped and discharged at will, polluting fertile land and soil. National statistics show that less than 60% of the sludge treated in sanitary landfills, fertilizers, incineration, and building materials is less than 60%, and 50% of the sludge has not been treated in a harmless manner.　　
 
Incomplete statistics show that as of 2017, the number of urban sewage treatment plants in my country has exceeded 4,000, the annual sludge production is about 35 million to 45 million tons, and the moisture content is above 80%. It is estimated that by 2020, my country's annual sludge production can reach 70 to 90 million tons.　　
 
The huge amount of sludge has put tremendous pressure on the ecological environment, and the situation of "sludge siege" once appeared. The sludge enriches the pollutants in the sewage, contains a large amount of nutrients such as nitrogen and phosphorus, as well as toxic and harmful substances such as organic matter, virus microorganisms, parasite eggs, heavy metals, etc. Without effective treatment and disposal, it will cause serious harm to the environment.
 
Especially in my country, the main method of sludge disposal is landfilling. Once the pollutants penetrate into the water source and soil, the polluted gas volatilizes into the air, which threatens the ecology and the healthy life of the people.　　
 
In order to solve the problem of sludge treatment, the "Water Ten" proposed that the field of sludge treatment will be tilted to a considerable extent. The "13th Five-Year Plan" of environmental protection also proposes to vigorously promote the stabilization, harmlessness and recycling of sludge. The rate of harmless treatment and disposal of sludge in prefecture-level and above cities will reach 90%, and the Beijing-Tianjin-Hebei region will reach 95%. .　　
 
The overweight of policies and regulations at the national level has undoubtedly greatly promoted the resource utilization and harmlessness of sludge treatment and disposal. Related treatment technologies and equipment have also been developed rapidly, and the phenomenon of "heavier water than sludge" in major sewage plants has also gained a certain degree. Of relief. In any case, the implementation of national policies and regulations related to sewage sludge has ignited the guiding light for sludge treatment.
 
The wheels surrounding the recycling of sludge have begun to rotate. For example, the concept of sewage treatment plants that are gaining popularity in recent times, the efficient use of sludge has played a vital role. However, some experts pointed out that due to the late start of sludge disposal in my country, although it has gone through a period of development, it is still lagging behind compared with developed countries. The most important core treatment technology is lacking, and the basic domestic situation is not considered, or even foreign technology is used mechanically. In addition, many treatment equipment is outdated and backward, and the effect and efficiency are very poor, which greatly hinders the progress of my country's sludge treatment.　　
 
It is reported that the sludge in my country is slightly different from that in foreign countries. Specifically, the amount of sludge produced in my country is huge and relatively concentrated, and the content of organic matter is low, which makes the treatment of sludge difficult, so it is difficult to treat.　　
 
We suggest that the national and local governments should increase support in many aspects such as policies and funds, further improve the existing backbone incentive mechanism, mobilize the enthusiasm of enterprises, and explore innovative business models, improve the charging mechanism, expand more channels, and promote investment The diversification of the main body can truly promote the sustainable development of the sludge treatment industry market.　　
 
Therefore, before 2020, sludge and solid waste, sewage, soil, etc. will become the key direction of environmental protection work. I believe that at a certain time, there will be more and more policy and financial support for sludge treatment and disposal. (Source: Internet)