I. Product Introduction

The sludge dewatering agent (ISDA - 1) independently developed by our company is a water - purification agent composed of a composite of inorganic iron - based flocculants and aluminum - based flocculants. Meanwhile, a filter aid is introduced to improve the filtration efficiency of the filtrate, reduce the resistance of the filter medium, and accelerate the solid - liquid separation. This product is specifically developed for the high - concentration and high - turbidity mud - water generated in the treatment process of domestic sewage and industrial sewage. It solves the problems of color reversion of traditional iron - based flocculants, large dosage of aluminum - based flocculants, and high water content of the dewatered sludge with organic polymer flocculants. At the same time, the introduction of a filter aid improves the filtration efficiency, and the water content of the mud cake obtained by plate - and - frame filtration can be controlled below 75%.

II. Product Advantages

• Simple operation: The operation is straightforward, the effluent is clear and transparent, and there is no color shift of iron ions.

• Wide applicability: It is suitable for sludge dewatering with plate - and - frame filter presses, applicable to a wide pH range of mud - water, and the mud cake does not adhere to the filter cloth.

• Efficient separation: It can achieve rapid solid - liquid separation, and the water content of the mud cake can be controlled below 75%.

III. Scope of Application

This product is used for the high - concentration and high - turbidity mud - water generated in the treatment process of domestic sewage and industrial sewage.

IV. Usage Methods

1. General steps

• Take a 1 - liter mud - water sample, dilute it 100 - 500 times by volume with water, and detect the sludge concentration in the water sample.

• Calculate the dosage of the solid sludge dewatering agent ISDA - 1 according to the ratio of the detected turbidity : sludge dewatering agent = 1mg/L : 3mg. Dissolve the agent and add it to the original mud - water.

• Stir for 10 minutes for reaction.

• Filter the mud - water mixture by pressure filtration or suction filtration.

• Detect various indicators (turbidity, TP, COD, chromaticity) of the supernatant.

• Dry the filter cake and detect its water content.

• Determine the dosage according to the results of the bench - scale test.

2. Dissolution of solid agent

• First, add the solid sludge dewatering agent to water to dissolve it into a solution with a concentration of about 10 - 30% (mass ratio) (add water first and then the agent while continuously stirring), and then pump it into the reaction tank.

3. Selection of filtration equipment

• The plate - and - frame filter press should be selected as the pressure - filtration device.