Conditioner for dewatering domestic sludge and preparation method thereof

Abstract

The invention provides a conditioner for dewatering domestic sludge and a preparation method thereof, and relates to the technical field of sludge dewatering treatment. The conditioner for dewatering the domestic sludge is prepared from the following raw materials in parts by weight: 10 to 20 parts of polyferric sulfate, 30 to 50 parts of polyaluminum chloride, 20 to 30 parts of ferric trichloride, 2 to 4 parts of potassium permanganate, 20 to 30 parts of cationic polyacrylamide, 10 to 20 parts of lime powder, 8 to 10 parts of cationic hydroxyethyl cellulose, 10 to 14 parts of earthworm soil, 6 to 10 parts of talcum powder, 6 to 8 parts of paper scrap powder and 1 to 3 parts of stabilizer. 2-3 parts of a dispersant and 2-4 parts of a coagulant aid. According to the invention, the use of chemical substances is reduced, more organic matters are introduced, in the domestic sludge treatment process, heavy metals and nitrogen and phosphorus elements in the sludge are rapidly removed through the chemical substances, and through earthworm soil, talcum powder, paper scrap powder and the like, a relatively good environment for microorganisms is introduced into the sludge, so that the decomposition effect of the microorganisms is facilitated; the long-term efficient sludge treatment effect is achieved.

Description

technical field [0001] The invention relates to the technical field of sludge dewatering treatment, in particular to a conditioning agent for domestic sludge dewatering and a preparation method thereof. Background technique [0002] A sludge treatment method that removes water from fluidized primary, concentrated or digested sludge and converts it into semi-solid or solid sludge. After dehydration, the moisture content of the sludge can be reduced to 55% to 100%. Eighty percent, depending on the nature of the sludge and sediment and the efficiency of the dehydration equipment, the further dehydration of the sludge is called sludge drying, the moisture content of the dried sludge is less than 10%, the dehydration method, There are mainly natural drying method, mechanical dehydration method and granulation method. Natural drying method and mechanical dehydration method are suitable for sewage sludge, and granulation method is suitable for coagulation and sedimentation sludge. ...

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Problems solved by technology

[0003] In order to improve the dehydration rate of domestic sludge, some conditioning agents need to be added during dehydration of domestic sludge to reduce the water content of the dehydrated sludge. The patent publication number CN105314815A is named as a sludge dehydration conditioner, including the following weight percentages Each component: 30-70% desulfurization ash, 5-15% magnesium salt, 5-30% iron salt, 2-20% aluminum salt, 0.1-15% magnesium oxide, and also provides the dehydration method of the conditioner, Including the steps of conditioner solution preparation, sludge conditioning, flocculant solution preparation and sludge dehydration, the invention adopts a wide range of raw materials, low price, low preparation cost, convenient use, good dehydration effect, and can rely on the existing The sludge dewatering facility is carried out, and the implementation process is simple, which can effectively improve the stability and reliability of the sludge dewatering process, and can be widely used in the treatment of various wastewater, sewage and sludge. However, the conditioning agent in the prior art mainly relies on Chemical substances, first of all, the use cost of conditioners is high, and secondly, too many chemical substances are easy to cause secondary pollution to the sludge, and the sludge after treatment in the prior art has little recycling value, which to a certain extent has caused waste of resources

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