Water quality improvement treatment process

Abstract

The invention belongs to the field of water treatment, and particularly relates to a water quality improvement treatment process. The treatment process comprises the following steps: step 1, mixing and stirring magnesium-aluminum carbonate type hydrotalcite, magnesium-iron carbonate type hydrotalcite, lanthanum chloride, activated carbon and water to form a reagent; step 2, adding the reagent intoa blue-green algae water body, then adding metal powder, adding hydrogen peroxide and an alkali solution to adjust the pH value to 10-11, and carrying out stirring for a reaction for 60 min or aboveto obtain a reaction solution; step 3, carrying out pressure filtration on the reaction solution, and removing blue-green algae dry substances obtained by filtration to obtain a filtrate; and step 4,sequentially introducing the filtrate into a gas floatation tank and an anoxic-oxic (AO) biological tank for treatment, and introducing the treated filtrate into a sedimentation tank for treatment, sothat the discharged water reaches the municipal wastewater discharge standard. According to the invention, through a redox system formed by the hydrotalcite and the metal powder, reducibility of elemental metal and ferrous ions is utilized to carry out deep treatment on a blue-green algae water body, so that the problems of difficult dehydration of blue-green algae and difficult post-treatment are effectively solved, and the effect of reducing phosphorus and nitrogen is achieved.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a water quality improvement treatment process. Background technique [0002] With the development of modern Chinese society and the increase of population, the water pollution of rivers and lakes in various places has increased year by year. In recent years, some lakes in China have gradually experienced eutrophication. The root cause of water eutrophication is excess nutrition in water, which contains a variety of dissolved phosphorus and dissolved nitrogen. During the deduction process of survival competition, the diversity of species in water biological communities is reduced, and grass-type water bodies are transformed into algae-type water bodies. As the number of cyanobacteria in the water increases significantly, the ecological structure in the water is seriously out of balance, and the odor brought by it brings extremely poor sensory experience to nearby residen...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems in the prior art, the present invention provides a water quality improvement treatment process, which solves the problem of difficult treatment of eutrophic water bodies, through the redox system formed by hydrotalcite and metal powder, supplemented by the use of elemental metals and ferrous ions The reduction of cyanobacteria, the formation of advanced treatment of cyanobacteria water, not only effectively solve the problem of difficult dehydration of cyanobacteria, difficult post-treatment, but also achieve the effect of reducing phosphorus and nitrogen