Sludge treatment is a final arrangement of sludge. Sludge is generally used as agricultural fertilizer, building materials, or landfill, incineration, disposal and so on. So that the treated sludge can achieve long-term stability, will not have harmful effects on human health and ecological environment. Sludge treatment types are divided into four categories: land use, building materials use, incineration and landfill. < a href = "http://www.xindinghao.com/" > < strong > fold screw type sludge dewatering machine < / strong > < / a > < / p >

1. Landfill treatment

Generally speaking, landfill methods are relatively simple, low cost, practical and operable. Landfill treatment method is a relatively mature treatment method at present. The sludge needs to be reduced, harmless and stabilized to a certain extent, and then the sludge is buried in the soil. Although this method is simple and economical, it is also limited by land resources, especially in countries with shortage of land resources, sludge landfill should also consider the impact on groundwater, and the follow-up problems of sludge treatment are difficult to estimate.

2. Incineration treatment

Incineration of sludge can achieve the goal of reducing, harmless and stabilizing the sludge. The incineration process also generates some energy, which can also be put to good use and can be used to generate electricity. Although sludge incineration has many advantages, if there is insufficient oxygen, it will produce a large number of toxic and harmful gases such as nitric oxide and sulfur dioxide. Heavy metals and dust and soot from combustion are also difficult to deal with.

3. Dry heat treatment

Sludge drying treatment can effectively reduce the volume of sludge, make the sludge more stable, free of pathogens and odors. After drying, it can be used as a soil amendment or energy source. As early as the middle of the last century, some developed countries began to use this method to treat sludge. After years of technological development, sludge drying technology has gradually matured and become a good sludge treatment method.