Method for removing odor substances from source water of domestic drinking water

Abstract

The invention belongs to the technical field of drinking water treatment, and discloses a method for removing odor substances from source water of domestic drinking water. The method comprises the following steps: a, carrying out micro / nano pure oxygen aeration oxidation treatment on to-be-filtered water which is subjected to coagulating sedimentation treatment, releasing a lot of micro / nano pure oxygen bubbles from mixed high-oxygen water caused by a pressure drop, and oxidizing to remove sulfur ether and thiol odor substances; and b, filtering the to-be-filtered water which is subjected to micro / nano pure oxygen aeration through an active anthracite filter chamber, and further removing adsorbable odor substances by using the absorption action. According to the method disclosed by the invention, oxidation of micro / nano pure oxygen bubbles is organically combined with absorption action of a novel filter material active anthracite, so that the removal effect on a plurality of odor substances is greatly improved; the method is environment-friendly and healthy; a by-product is not generated in the treatment process; the water quality is not affected; a new odor substance is not generated; the method disclosed by the invention is low in cost, flexible in application and suitable for transformation of the conventional water treatment processes built in China; and the transformation can only be carried out on the basis of an original sand filter chamber of a water plant.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and relates to a method for effectively removing odor and taste substances in domestic drinking water source water. Background technique [0002] Odor and taste are common problems in drinking water treatment at home and abroad. The impact of smell and taste on human health is not yet clear, but it reduces the quality of drinking water and can be judged most intuitively by drinkers. It is the human evaluation of drinking water quality. Earliest and most immediate argument. my country's drinking water hygiene standard (GB 5749-2006) stipulates that drinking water must not have a bad smell. In recent years, due to the discharge of a large amount of industrial wastewater and domestic sewage into natural water bodies, the eutrophication of water sources has been accelerated, causing the water body to produce odors, which seriously threaten the quality of drinking water. The current...

AI Technical Summary

Problems solved by technology

However, there are also some problems in the adsorption method: the cost of adding powdered activated carbon is high, and the powdered activated carbon needs a certain amount of adsorption time to achieve a good adsorption effect. The source water of many water plants only takes a few minutes from the point of addition to the flocculation tank. The added powder activated carbon will soon be coagulated and precipitated, and cannot exert its due adsorption effect; the adsorption capacity of the activated carbon filter is limited, and the filter material needs to be regenerated regularly; the adsorption method can absorb and remove odor substances such as mercaptans and sulfides Low efficiency, can not effectively guarantee the effect of odor removal

Compared with single pre-oxidation or single powder activated carbon adsorption, the former can better remove odor substances, but there are also problems such as easy production of by-products, high dosing cost, and insufficient adsorption time; the ozone-activated carbon advanced treatment process has a good Odor and odor removal effect, but the investment and operation costs of this process are high, and it needs to occupy a large infrastructure land. Many established water plants do not have enough space to increase the structures required for this process.