When the moisture content of the sludge is high, in order to reduce its moisture content, the following agents can be considered:

Polyacrylamide (PAM) :

Characteristics: PAM is a water-soluble polymer with excellent flocculation and condensation properties.

Function: PAM can react with suspended particles in sewage through hydrogen bonding, so that they gather together to form a larger flocculent, so that it is easy to settle and separate.

Advantages: efficient, fast, safe, non-toxic, etc.

Note: The price of PAM is relatively high.

Polyferric sulfate (PFs) :

Characteristics: PFs is an efficient and low-cost sludge dehydrating agent with a wide range of coagulant effects.

Function: PFs can gather suspended particles in sewage through adsorption and condensation to form a larger flocculent, which is easy to settle and separate.

Note: PFs is used in relatively small amounts, but it may cause corrosion to equipment.

Biological enzyme preparations:

Characteristics: Biological enzyme preparation is a new type of sludge dehydrating agent.

Action: The organic matter in the sludge is broken down by enzymes, making it drier.

Advantages: high efficiency, environmental protection, safety, etc.

Note: The price of biological enzyme preparations is relatively high.

Clay dehydrating agent:

Composition: Clay dehydrating agent is mainly composed of chlorite and montmorillonite.

Characteristics: Good dehydration effect, water resistance and thermal stability.

Function: It can quickly cement the water in the sludge together to form solid particles and reduce the moisture content.

Advantages: Compared with silicone dehydrating agent more environmentally friendly, there is no chemical reaction, so the use is more safe and reliable.

Silicone dehydrating agent:

Ingredients: Silicone dehydrating agent is made of silicate and silicate ester.

Function: It can greatly reduce the moisture content of sludge in a short time.

Note: The use of silicone dehydrants needs to be cautious, because it can lead to increased levels of pesticides and heavy metals in wastewater, so it is necessary to fully test before

use to ensure that the agent will not cause serious environmental impacts.

Sludge conditioner:

Function: Sludge conditioner can fully break the wall of organic biomass in the sludge, release water, and then flocculate and dehydrate.

Advantages: The amount is small, the dehydration efficiency is high, the microstructure of the dehydrated mud cake is loose and breathable, suitable for further drying treatment.

Note: When using the sludge conditioner, it is necessary to add the appropriate amount of the agent according to the manufacturer's recommendations, and fully mix it evenly.

Polyaluminum chloride:

Characteristics: It has the characteristics of high aluminum content, good flocculation effect and non-toxic hydrolysis products.

Advantages: safe to use, good dehydration effect.

 

When selecting the agent, it is necessary to comprehensively consider the specific properties of the sludge (such as moisture content, organic content, pH value, etc.) to select the appropriate agent and the appropriate amount of addition. At the same time, in the process of use, it is necessary to strictly abide by the operating specifications to ensure the effectiveness and safety of the drug.