Composite oxidizing treatment process of micro-polluted source water

Abstract

The invention discloses a method for composite oxidization treatment of micro-polluted source water, relating to a water treatment technology which uses a potassium permanganate adder, an ozone generator, a contact oxidizing chamber, a flocculating agent adder, a coagulant aid adder, a mechanical stirring pool, a sedimentation tank and a filtering basin. A chlorine dioxide adder and the potassium permanganate adder are adopted to add chlorine dioxide solution and potassium permanganate solution into the source water; the chlorine dioxide solution is added first, then the potassium permanganate solution is added, then the chlorine dioxide solution and the potassium permanganate solution enter a contact oxidation pond for contact oxidation, the co-oxidation action of chlorine dioxide oxidant and potassium permanganate oxidant is used to jointly oxidize organism pollution in a water source, the coagulation aid action of the chlorine dioxide oxidant and the potassium permanganate oxidant is utilized to strengthen the generation and the precipitation of aggregates at the same time, and the oxidized water enters a water plant. By improving the prior process, the method with simple operation process, low cost, convenient equipment installation, and micro-pollution removal is provided.

Description

Technical field [0001] The invention relates to a water treatment technology, in particular to a method for treating drinking water by chemical oxidation to remove micro-polluted source water. Background technique [0002] With the development of industrialization and the improvement of human material life, the discharge of industrial waste water and domestic sewage to water bodies is increasing, especially the large amount of untreated sewage discharge, as well as non-point source pollution such as farmland runoff and atmospheric sedimentation, causing the world The pollution of water sources in a range is increasing, which brings great harm to human health. The micro-pollution of drinking water sources brings challenges to traditional water treatment processes. In view of the universality of drinking water micro-pollution and its hazards, the method of pre-oxidizing drinking water to remove micro-pollution has become a topic of important social and economic significance. [000...

AI Technical Summary

Problems solved by technology

Pre-chlorination and chlorine dioxide may lead to the formation of a large number of halogenated organic pollutants that are not easily removed by subsequent conventional processes, and thus may reduce the toxicological safety of the treated water

Although the combined process of potassium permanganate oxidation can effectively reduce the mutagenic activity in water and have a good removal effect on the precursors of water mutations, some of the oxidation products of organic matter after oxidation by potassium permanganate are bases. Replacement mutants, they are not easy to be removed by subsequent conventional processes. After the combined process effluent is chlorinated, these precursors are converted into mutagenic substances, which greatly increases the mutagenic activity of water

Although ozone pre-oxidation has a partial removal effect on frameshift mutants in water, it has no obvious ability to deal with base substitution mutants, and some ozonated products are not easily removed by conventional treatment. The mutagenic activity of effluent water after chlorination is comparable to that of raw water. higher rise than

The biological oxidation method takes a long time for inoculation, cultivation, acclimatization and maturation. The above methods may bring by-products, or the operating conditions are limited and the investment and operation costs are high.

[0004] In short, due to certain specific operating conditions, some of the above methods are difficult to implement in engineering

The effluent water quality is unstable and the operation is difficult to control

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