Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment

Abstract

The invention discloses a radial calcium carbonate biological filler, the biological filler is a radial calcium carbonate crystal, the radial calcium carbonate crystal comprises radial calcium carbonate branches, the diameter of the radial calcium carbonate branches is 50-2000 [mu] m, and the number of the radial calcium carbonate branches is 4-100. The radial calcium carbonate biological filler is used as a framework, granular sludge cenobium is formed, the cenobium is not prone to being dispersed by water flow and aeration, better anaerobic, anoxic and aerobic microenvironments can be formed in the cenobium, the optimal growth microenvironment is provided for various microorganisms, and the nitrogen and phosphorus removal and COD reduction capacity of the bioreactor is effectively improved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a radial calcium carbonate biological filler, a preparation method and its application in sewage treatment. Background technique [0002] Biological method is the main method of sewage treatment. Through the metabolism of various microorganisms in the bioreactor, the pollutants in the sewage are synthesized into microbial cells, and degraded into inorganic substances such as carbon dioxide and water, and finally the sewage is purified. [0003] The traditional biological method is mainly the activated sludge method. The activated sludge is mainly composed of bacterial micelles, which are formed by the aggregation of a large number of bacteria through extracellular polymers. From the outside to the inside, the bacteria micelles have aerobic, anoxic and anaerobic microenvironments respectively, which provide a relatively suitable microenvironment for various types of microorganisms,...

AI Technical Summary

Problems solved by technology

For example, suspended ball packing and polyurethane sponge packing, after long-term use, the sludge will block all the pores inside the porous packing, greatly reducing the mass transfer efficiency between the packing and the sewage, and the effective biomass in the bioreactor will be reversed. reduced, the effect of sewage treatment will also become worse

MBBR fluidized bed filler and suspension ball filler are also easy to deposit in the corners of the biochemical tank, so it is generally necessary to install a filler support net and a pusher at the bottom of the tank, which is expensive to transform and difficult to maintain

Elastic fillers, braided fillers, and combined fillers all suspend fibrous fillers with large specific surface areas in the biological pool through some kind of support material. Although the problem of easy deposition of suspended fillers is solved, the installation density of the fillers is limited and the long-term After use, the fibrous packing is easily wrapped in sludge, which reduces the mass transfer efficiency

At the same time, once the supporting material is damaged, the suspended packing is easy to be wound on other packings, resulting in a significant decrease in the mass transfer efficiency and sewage treatment effect of the entire biofilm system, and difficult maintenance

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