Papermaking wastewater treatment agent

Abstract

The invention provides a papermaking wastewater treatment agent comprising the following components in parts by weight: 40-60 parts of polyaluminum sulfate, 1-3 parts of polyacrylamide, 10-20 parts of starch xanthate, 15-30 parts of modified diatomite, 6-12 parts of chitosan, 2-5 parts of sepiolite powder, 4-8 parts of cellulose acetate and 1-3 parts of dithiocarbamate salt, wherein the modified diatomite is mainly prepared from diatomite, graphene oxide, iron powder and ferrous sulfate. The treatment agent is stable in performance, and can be used for effectively removing pollutants from papermaking wastewater.

Description

Technical field

[0001] The invention belongs to the technical field of water treatment, and specifically relates to a papermaking wastewater treatment agent. Background technique

[0002] Papermaking wastewater mainly comes from the two production processes of pulping and papermaking in the papermaking industry. Pulping is to separate the fibers from plant raw materials into a slurry, and then bleach; papermaking is to dilute the slurry, shape, and Press and dry to make paper. Both processes discharge a large amount of waste water, and the waste water produced by pulping is the most polluted. The wastewater discharged from pulp washing is dark brown, called black water. The concentration of pollutants in the black water is very high, the BOD is as high as 5-40g / L, and it contains a lot of fiber, inorganic salts and pigments. The wastewater discharged from the bleaching process also contains a large amount of acid and alkali substances. The waste water discharged from the paper...

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