Wastewater treatment agent for paper mill

Abstract

The invention relates to a wastewater treatment agent for a paper mill. The wastewater treatment agent for the paper mill comprises the following components: 50-80 parts of biomass charcoal powder, 20-40 parts of synergist formed by polymeric ferric sulfate or aluminium polychlorid or poly propylene amide or carboxymethyl starch, 30-40 parts of ethidene diamine, and 10-15 parts of phosphate, wherein the phosphate is one or more of sodium or potassium salt containing phosphate radical, hydrogen phosphate or dihydrogen phosphate radical. By adopting the wastewater treatment agent disclosed by the invention, the wastewater treatment agent can effectively play the roles of corrosion inhibition, scale inhibition, and inhibition of growth of algae after being added to a circulating water system, and plays a good protection role on a cooling water system; no 'three wastes' are discharged in the entire process; the pollution of black liquor of a pulping paper mill is solved; the wastewater treatment agent is used for treatment of wastewater, treats the waste by the waste, is simple in treatment process, less in dosage and good in effect; the cost of water treatment is effectively reduced; and the wastewater treatment agent has good economic benefit and wide social benefit.

Description

technical field [0001] The invention relates to a chemical reagent, in particular to a paper mill sewage treatment agent. Background technique [0002] The coagulants currently used to treat industrial wastewater include aluminum salt coagulants, iron salt coagulants, aluminum salts and iron salts in a weight ratio of 1: 1. These coagulants are all due to cost High and difficult to be widely used, and when they are used to treat wastewater, the resulting sludge is of poor quality, slow to settle, high in moisture content and difficult to dehydrate. And lignin is a by-product of the paper industry, which is rarely used. A large amount of alkali lignin is discharged into rivers every year, causing a great waste of lignin resources. At the same time, it seriously pollutes the environment and destroys the ecological balance. In order to eliminate pollution, waste For treasure, extracting alkali lignin from papermaking black liquor and using alkali lignin as raw material to ...

AI Technical Summary

Problems solved by technology

[0002] Coagulants currently used to treat industrial wastewater include aluminum salt coagulants, iron salt coagulants, composite coagulants composed of aluminum salts and iron salts in a weight ratio of 1:1. High and difficult to be widely used, and when they are used to treat wastewater, the resulting sludge is of poor quality, slow to settle, high in moisture content and difficult to dehydrate

And lignin is a by-product of the paper industry, which is rarely used. A large amount of alkali lignin is discharged into rivers every year, causing a great waste of lignin resources. At the same time, it seriously pollutes the environment and destroys the ecological balance. In order to eliminate pollution, waste For treasure, extract alkali lignin from papermaking black liquor and use alkali lignin as raw material to further prepare sewage treatment agent, which can save cost and meet the needs of environmental protection, so it is necessary to provide a new type of sewage treatment agent