With the acceleration of urbanization in my country, the urban population has risen sharply, and domestic sewage is also increasing, and the accompanying sludge is even more accumulated. In recent years, the problem of sludge treatment has become particularly prominent under the pressure of national environmental protection policies. How to treat sludge more rationally has become an urgent problem for many sewage treatment plants.
Urban sewage treatment plants mainly treat industrial wastewater and residential water. Therefore, the sewage is often accompanied by toxic and harmful substances, and the content of heavy metals is high. In the process of sewage treatment, many toxic and harmful substances are precipitated as part of the sludge, therefore, the source and composition of the sludge must be considered when treating and disposing of these sludges. At present, sludge disposal is mainly sludge composting, biological utilization, landfill, carbonization utilization, etc., but the effect is not very satisfactory.
In view of the above sludge disposal methods, it is impossible to completely unify the three aspects of sludge reduction, harmlessness and resource utilization in the process of disposal, resulting in secondary pollution and excessive heavy metals in some sludge disposal. And the sludge is made of ceramsite, all of the above problems can be effectively solved.
Sludge production ceramsite has the following advantages:
1. Both the organic and inorganic components in the sludge have been effectively utilized. The organic matter in the sludge is used as the foaming agent in the roasting process, and the inorganic component becomes the main component of the ceramsite.
2. Reduced secondary pollution. When making ceramsite, the high temperature environment of roasting can completely decompose and solidify harmful substances such as refractory organics, pathogens, and heavy metals, which has certain economic and environmental benefits.
3. The sludge ceramsite adopts modern advanced production technology, which can effectively improve the quality of ceramsite and make the product more high-quality.
4. It can replace phthalate and shale with small traditional ceramsite manufacturing process, saving land and mineral resources.
In view of the rare problem of sludge disposal, Henan Zhengzhou Mining Machinery has developed a sludge-free ceramsite production line suitable for sludge disposal based on the current ceramsite process and the characteristics of sludge, which has found a new way for sludge recycling.
