Starch derivative for sewage treatment and preparation method thereof

Abstract

The invention discloses a starch derivative for a sewage treatment and a preparation method thereof. The starch derivative comprises following raw materials: cassava starch, potato starch, chloroacetic acid, epoxy chloropropane, and N,N'-methylene bisacrylamide. The preparation method comprises the following steps: adding cassava starch into a hydrochloric acid solution, carrying out reactions for30 to 40 minutes, then adding a chloroacetic acid solution, carrying out reactions for 3 to 4 hours, filtering to obtain a filter cake A; adding potato starch into an ethanol solution, adding a sodium hydroxide solution, heating to a temperature of 60 to 70 DEG C, adding epoxy chloropropane, carrying out reactions for 4 to 5 hours to obtain a solution B; adding the filter cake A into the solutionB, then adding N,N'-methylene bisacrylamide, and carrying out reactions for 2 to 3 hours to obtain the starch derivative for sewage treatment. The provided starch derivative is a natural modified polymer sewage processing agent and has an obvious effect on treating dyeing wastewater.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a starch derivative used for sewage treatment and a preparation method thereof. Background technique [0002] With the rapid development of my country's textile printing and dyeing industry, dye wastewater has become one of the most important sources of water pollution today. Its discharge is about one-tenth of the total discharge of industrial wastewater. These wastewaters come from bleaching, dyeing, printing, and finishing processes in the printing and dyeing process. It has the characteristics of large volume, high concentration, complex composition, and high chroma. Even if the concentration is very low, it will affect the light transmittance and The growth of aquatic organisms can easily lead to eutrophication and destroy the ecological balance of water bodies. Flocculation and sedimentation method is an economical and simple water quality treatment method commonly used at...

AI Technical Summary

Problems solved by technology

These wastewaters come from bleaching, dyeing, printing, and finishing processes in the printing and dyeing process. It has the characteristics of large volume, high concentration, complex composition, and high chroma. Even if the concentration is very low, it will affect the light transmittance and The growth of aquatic organisms can easily lead to eutrophication and destroy the ecological balance of water bodies

Flocculation and sedimentation method is an economical and simple water quality treatment method commonly used at home and abroad. However, with the increase of water pollution, simple inorganic salt flocculants can no longer meet the needs of water treatment. The emergence of polymer flocculants And from a single type to a composite type, the water treatment efficiency has been greatly improved

[0003] The application of inorganic flocculants has a long history, but its application is limited due to large dosage and low efficiency

Among organic polymer flocculants, due to the high production cost of synthetic organic polymer flocculants and the existence of a certain amount of residual monomers, toxicity is inevitable, so its application is also subject to certain restrictions.