Leather sewage treatment agent

Abstract

The invention discloses lather sewage treatment agent which comprises the following raw materials in parts by weight: 15-20 parts of coal ash, 10-15 parts of attapulgite hybrids, 20-25 parts of 4A zeolite, 20-25 parts of lime and 10-15 parts of clay. The flocculant disclosed by the invention is a special treatment agent for leather sewage, according to different properties of different treatment agents, various impurities in sewage can be settled in multiple directions and multiple angles, due to addition of the 4A zeolite, a very good framework function can be achieved in the treatment agent, sludge floc aggregate can be kept porous when being dehydrated, collapse of the floc aggregate is prevented, the compressibility of the impurities in sewage can be degraded, and due to cooperation of different components, surface charges and interface activity of sludge granules can be effectively improved, and the filtering speed of the sludge can be greatly increased.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a leather sewage treatment agent. Background technique [0002] Tannery sewage is composed of strongly acidic liming and dehairing wastewater and weakly acidic tanning wastewater, which contains high concentrations of tanning materials, chlorides, sulfides, surfactants, chemical additives, oils, proteins and Suspended solids in water quality, etc. The waste water has a turbid appearance and an unpleasant smell, and must be treated before it can be discharged. [0003] In the prior art, leather sewage needs to be chemically adjusted by adding chemical reagents to achieve high dehydration efficiency. The general chemical reagents are organic polymer flocculants and inorganic flocculants. The commonly used organic polymer flocculants are polyacrylamide, inorganic flocculation The agent is ferric chloride, aluminum chloride, polyaluminum silicate, polyaluminum ferric chlori...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, leather sewage needs to be chemically adjusted by adding chemical reagents to achieve high dehydration efficiency. The general chemical reagents are organic polymer flocculants and inorganic flocculants. The commonly used organic polymer flocculants are polyacrylamide, inorganic flocculation The agent is ferric chloride, aluminum chloride, polyaluminum silicate, polyaluminum ferric chloride, etc. A single flocculant can only act on one or two types of substances in sewage, and the actual flocculation effect is not obvious , and the mechanism of the synergistic or synergistic effect between the composite flocculants is not clear, so the prior art cannot give guidance on the combination or use of flocculants, and the effect is better only by repeated combinations and attempts. A good flocculant has a certain degree of contingency and unpredictability, and the probability of failure is high. Due to the complex components of leather wastewater, the existing flocculants cannot play a good role in flocculation and sedimentation, especially leather wastewater containing Sulfur ions and chromium ions are highly toxic, and no treatment agent with excellent effects on leather sewage has been found so far

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