Modified environment-friendly flocculant for municipal sewage and preparation method of flocculant

Abstract

The invention discloses a modified environment-friendly flocculant for municipal sewage and a preparation method of the flocculant. The modified environment-friendly flocculant is prepared from raw materials in parts by weight as follows: 5-8 parts of biological bacterial sludge, 14-16 parts of straw powder, 5-12 parts of cinnamomum camphora leaf, 2-9 parts of apatite, 5-8 parts of lignin, 15-25 parts of expanded vermiculite powder, 2-4 parts of calamine powder, 4-9 parts of activated carbon fiber, 5-10 parts of hydroxylated acrylic resin, 10-12 parts of polyacrylate, 6-9 parts of dimethylethanolamine, 2-5 parts ofdisodium ethylenediaminetetraacetate, 4-9 parts of aluminium oxide, 3-6 parts of activated silica, 1-4 parts of anionic polyacrylamide, 3-6 parts of sorbitol, 1-4 parts of octadecanamide, 4-8 parts of a heat stabilizer, 2-5 parts of a coupling agent and 1-3 parts of a coagulant aid. The prepared flocculant is stable in performance and can effectively remove hazardous substances in the municipal sewage, and treated sewage can be reused effectively. The invention further discloses the corresponding preparation method.

Description

technical field [0001] The invention relates to the field of wastewater treatment agents, in particular to a modified and environmentally friendly urban sewage flocculant and a preparation method thereof. Background technique [0002] Municipal sewage is all drainage collected through the sewer system, and it is the mixed water of various domestic sewage, industrial wastewater and urban rainfall runoff discharged into the sewer system. Domestic sewage is the water discharged from people's daily life. It is the water discharged from households, public facilities (restaurants, hotels, theaters, stadiums, institutions, schools and shops, etc.) and living facilities such as kitchens, toilets, bathrooms and laundry rooms in factories. The water quality of this kind of sewage is characterized by high organic matter, such as starch, protein, oil, etc., as well as inorganic matter such as nitrogen, phosphorus, etc. In addition, it also contains pathogenic microorganisms and more su...

AI Technical Summary

Problems solved by technology

This treatment process can remove almost all the organic matter that constitutes BOD, but it cannot effectively remove the refractory organic matter that constitutes COD. Even the well-treated secondary effluent still contains 50-120 mg / L organic matter, including tannins, Lignin, humus, ethers, protein-containing substances and other substances that cause color and odor, as well as herbicides and insecticides, etc.

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