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

A biological filler and sewage treatment technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of easy deposition of suspended fillers, reduction of effective biomass, and reduction of mass transfer efficiency, etc. problems, achieve good mud-water separation effect, reduce sludge yield and high mass transfer efficiency

Inactive Publication Date: 2021-07-23
四川绵阳岷山实业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0020] Application of radial calcium carbonate biofiller in A2O wastewater treatment process. The sewage treatment capacity of the experimental A2O sewage treatment device is 5 tons / day. The sewage is synthetic wastewater, with a COD of 400mg / L, ammonia nitrogen of 40mg / L, total phosphorus of 3mg / L, and a water temperature of 20°C. The A2O sewage treatment plant has been in operation for three months before and after the addition of radial calcium carbonate biological filler, and the dosage of radial calcium carbonate biological filler is 100mg / L (calculated based on the effective volume of the biochemical pool). Before adding the radial calcium carbonate biological filler, the MLSS is 3000mg / L, the SVI is 120ml / g, the COD removal rate is 90%, the total nitrogen removal rate is 65%, and the total phosphorus removal rate is 87%. After adding radial calcium carbonate biological filler, the sludge SVI dropped to 110ml / g, and the total nitrogen removal rate increased to 67%. The ...

Embodiment 2

[0022] Application of radial calcium carbonate biofiller in A2O wastewater treatment process. The sewage treatment capacity of the experimental A2O sewage treatment device is 5 tons / day. The sewage is synthetic wastewater, with a COD of 400mg / L, ammonia nitrogen of 40mg / L, total phosphorus of 3mg / L, and a water temperature of 20°C. The A2O sewage treatment plant has been in operation for three months before and after adding radial calcium carbonate biological filler, and the dosage of radial calcium carbonate biological filler is 500mg / L (calculated based on the effective volume of the biochemical pool). Before adding the radial calcium carbonate biological filler, the MLSS is 3000mg / L, the SVI is 120ml / g, the COD removal rate is 90%, the total nitrogen removal rate is 65%, and the total phosphorus removal rate is 87%. After adding the radial calcium carbonate biological filler, the sludge SVI decreased to 90ml / g, the removal rate of total nitrogen increased to 69%, and the re...

Embodiment 3

[0024] Application of radial calcium carbonate biofiller in A2O wastewater treatment process. The sewage treatment capacity of the experimental A2O sewage treatment device is 5 tons / day. The sewage is synthetic wastewater, with a COD of 400mg / L, ammonia nitrogen of 40mg / L, total phosphorus of 3mg / L, and a water temperature of 20°C. The A2O sewage treatment plant has been in operation for three months before and after adding radial calcium carbonate biological filler, and the dosage of radial calcium carbonate biological filler is 1000mg / L (calculated based on the effective volume of the biochemical pool). Before adding the radial calcium carbonate biological filler, the MLSS is 3000mg / L, the SVI is 120ml / g, the COD removal rate is 90%, the total nitrogen removal rate is 65%, and the total phosphorus removal rate is 87%. After adding radial calcium carbonate biological filler, the sludge SVI decreased to 75ml / g, the removal rate of total nitrogen increased to 67%, and the remov...

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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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/30C02F3/308C02F2101/16
Inventor 曹华仕
Owner 四川绵阳岷山实业集团有限公司
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