Compound flocculant for treating industrial wastewater

Abstract

The invention discloses a compound flocculant used for treatment of industrial wastewater. The compound flocculant comprises polydimethyldiallylammonium chloride, polyaspartic acid, quaternary ammonium salt, aluminum trichloride, acrylamide, polyaluminum ferric chloride, diethylamine ethylquinone methacrylate, coarse tapioca flour, corncob powder, polysilicate aluminum ferric sulfate, vinyltrimethoxysilane, rare earth and polyvinyl chloride hollow spheres. The compound flocculant has the following advantages: short time, good effect and low cost for flocculent precipitation are achieved; the active emulsifying power of water molecules is improved; harmful substances and heavy metals in water are degraded; specifically, wastewater with high concentration and high turbidity and unbiodegradable wastewater can be effectively treated; recycling of treated water can be realized; the removal rate of COD reaches 80% to 90%; the removal rate of BOD reaches 60% to 70%; the removal rate of heavymetals reaches 93% or above; specifically, the wastewater with high concentration and high turbidity and the unbiodegradable wastewater can be effectively treated; and the removal rate of SS and turbidity is up to 90% or above.

Description

technical field [0001] The invention relates to a water treatment agent, in particular to a compound flocculant for treating industrial waste water. Background technique [0002] Flocculation is one of the most commonly used key links in wastewater treatment processes. It greatly affects the operating conditions of subsequent processes, final effluent quality and costs, and thus becomes an important scientific and technological research and development field in environmental engineering. An efficient flocculation technology system should be closely combined with excellent flocculants, reactors and self-controlled dosing, among which flocculants play a central role. The key to flocculation treatment technology is to choose a suitable flocculant. [0003] There are many ways to classify flocculants. According to different compositions, they can generally be divided into inorganic flocculants, organic flocculants, and natural flocculants (such as biological flocculants). The ...

AI Technical Summary

Problems solved by technology

[0004] High-concentration industrial wastewater is not only different from domestic sewage, but also different from general industrial wastewater. It often contains a variety of toxic and harmful refractory organic matter, heavy metal ions and ammonia nitrogen and other pollutants. Due to the single flocculation component, the treatment effect of these high-concentration wastewater is not ideal, especially for the removal of dissolved pollutants in water.

Therefore, for high-concentration wastewater, there is still a lack of a flocculant with broad spectrum, high efficiency, good stability, strong specificity, excellent flocculation performance, and moderate cost performance.