Municipal sludge comes from a wide range of sources, from sewage plant sludge, water supply sludge, drainage sludge, construction site sludge, etc., so the material composition of sludge is more complex, including: more than 90% of water, organic substances (carbon, nitrogen, sulfur), inorganic substances, viruses, bacteria, harmful substances (mercury, lead, heavy metals), etc., which leads to the diversity of sludge characteristics.

The characteristics of sludge have the following aspects:

1. Moisture content and solid content

The moisture content of municipal sludge is very high, up to more than 90%, and the solid content is very low. There are three forms of water in sludge, namely free water, physical bound water and chemical bound water.

2. Volatility

The volatility of sludge is a kind of organic compounds and mixtures. The more volatile solids in sludge, the worse the stability of sludge. The volatility of sludge in different types and regions is different.

3. Bioavailability characteristics

The composition of the sludge is complex, which contains rich nutrients, especially organic matter, nitrogen, phosphorus and other trace elements have great utilization value, so the sludge drying is widely used, can be used as fertilizer in farmland, or used for building materials.

4. Harmful substances

Sludge also contains viruses, microorganisms, bacteria, heavy metals and other harmful substances, if not properly handled, will cause secondary pollution to the environment.

5. Dehydration performance

Sludge dewatering performance is poor, so in the process of sludge disposal and utilization, sludge mechanical dewatering or sludge drying is often used to remove the water in the sludge, and then the dry sludge after dehydration and drying is disposed of and utilized.

The reason of sludge compaction

Municipal sludge compaction is also because of its poor dewatering performance, high organic matter, the use of traditional dewatering agents: polyacrylamide, polyaluminum chloride, etc., can not achieve the effect of deep dehydration, the use of ferric chloride and lime is easy to cause corrosion and calcification of equipment, and is not conducive to the subsequent utilization of sludge resources, does not meet the requirements of environmental protection.

solution

Sludge conditioner is an organic compound sludge dehydrating agent. Sludge conditioner is a chemical agent that can change the surface structure of sludge, reduce the solid surface load of sludge, reduce the specific surface area of sludge and destroy the structure of bacteria. The main components are inorganic compounds, sludge surface structure modifier, degreaser, wall breaking agent, sludge surface treatment agent, sludge stripping agent and so on.