Normal-temperature modified sludge dehydrating agent and preparation method thereof

Abstract

The invention discloses a normal-temperature modified sludge dehydrating agent. The normal-temperature modified sludge dehydrating agent comprises, by weight, 20-30 parts of calcium oxide, 15-20 partsof ferric chloride, 30-40 parts of modified starch, 15-20 parts of diatomite, 5-10 parts of volcanic rock, 20-30 parts of gelatin, 5-10 parts of polyacrylamide, 1-2 parts of bentonite, 2-3 parts of talcum powder, 2-5 parts of muck and 1-3 parts of chitosan. The normal-temperature modified sludge dehydrating agent obtained in the invention is an organic-inorganic mixture, is powdery, contributes to separation of water and sludge particles in sludge, greatly improves the dehydration performance and compressibility of modified sludge, has sterilization and deodorization effects, can kill most ofmicroorganisms, worm eggs and the like, and reduces the odor concentration of the sludge by 90% or above. The addition amount of the dehydrating agent is 2-5%, the addition amount is small, the costis low, and the modification effect is better than that of a traditional modified dehydrating agent.

Description

technical field [0001] The invention relates to a sludge dehydrating agent, in particular to a normal temperature modified sludge dehydrating agent and a preparation method thereof. Background technique [0002] At present, the resource utilization methods of sludge at home and abroad mainly include sludge incineration, sludge brick making, sludge making organic fertilizer, sludge making ceramsite, sludge making ecological cement, sludge anaerobic digestion to produce methane, etc., or Simple sanitary landfill. In addition to sludge anaerobic digestion, no matter what kind of sludge utilization method, the sludge needs to be dehydrated or dried to ensure the effect of subsequent disposal. [0003] Excessive moisture content of sludge will lead to high energy consumption of sludge incineration and increase the cost of treatment, and a large amount of water will affect the incineration temperature, and the effect of incineration treatment will not be achieved; If the sludge ...

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Problems solved by technology

[0003] Excessive moisture content of sludge will lead to high energy consumption of sludge incineration and increase the cost of treatment, and a large amount of water will affect the incineration temperature, and the effect of incineration treatment will not be achieved; If the sludge composting process directly uses sludge with a moisture content of 85%, the sludge cannot be mixed evenly with other compost materials, and the temperature of decomposition will be affected, so that the effect of sludge composting cannot be achieved. The product is also unqualified; if the sludge with such a high moisture content is directly disposed of in a sanitary landfill, it will not only occupy a large amount of land, but will also cause serious pollution

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