Method for purifying water through biological enzyme method

Abstract

The invention belongs to the technical field of environmental protection, and particularly relates to a method for purifying water through a biological enzyme method, which comprises the following steps: (1) purifying with a physical purifying agent, filtering the purified water body, and removing the filter residue; and (2) adding biological enzymes into the water body subjected to the treatment in the step (1), wherein the weight ratio of the biological enzymes to waste water is 1:(160-280). When water is purified through the method, physical flocculating settling is performed first to remove the settled impurities, and the water is further treated through the biological enzymes; and the multiple biological enzymes are combined to coact on the contaminated water body, so that the pH value, chroma, COD (chemical oxygen demand), BOD (biochemical oxygen demand) 5, sulfide content, nitride content and organic phosphorus content of the water body are all reduced within specified standards, thereby achieving the purpose of purifying the water body.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for purifying water by a biological enzymatic method. Background technique [0002] At present, the commonly used water purifiers include the following categories: aluminum salts, such as polyaluminum chloride, aluminum trichloride hexahydrate, aluminum sulfate, etc.; iron salts: ferric chloride, etc.; polymers, such as polyacrylamide, etc. ;diatomite. The first three water purifiers are relatively expensive, and their scope of use is limited by the presence of metal ions. The iron salts in them act as sinks and are effective in removing muddy and high-turbidity sewage, but they affect the color of the water quality. , and the use of diatomite as a water purifier has a lower price. Because of resource constraints, the development is late and is in its infancy. The existing diatomite water purifiers generally use the physical properties of di...

AI Technical Summary

Problems solved by technology

The first three water purifiers are relatively expensive, and their scope of use is limited by the presence of metal ions. The iron salts in them act as sinks and are effective in removing muddy and high-turbidity sewage, but they affect the color of the water quality. , and the use of diatomite as a water purifier has a lower price. Because of resource constraints, the development is late and is in its infancy. The existing diatomite water purifiers generally use the physical properties of diatomite itself Purification of water quality, due to its slow flocculation speed and long suspension time, often the water purification effect is not good and cannot meet the requirements

A few use diatomite to supplement other additives, such as "Preparation and Application of Composite High-efficiency Water Purifier", which mainly use diatomite as raw material, activate diatomite powder, polyaluminum chloride, polysulfuric acid Iron, polyaluminum sulfate or polyaluminum chloride, and boron-magnesium tailing slag modified substances have made some progress in water purifiers that only use diatomite, but because they are purified with the same formula for different water qualities, often The purification effect of certain water quality is good, but the purification effect of other different water quality is not good, it cannot meet the requirements of users, the adaptability is poor, and the purification effect is unstable

[0003] There are safety problems in organic flocculants. Although the fully polymerized enamine flocculant itself has no problems, its polymerized monomer acrylamide has strong toxicity to the nervous system and can also cause bladder cancer.