Method for strengthening activity of anaerobic ammoxidized microorganisms through polyvinyl alcohol-sodium alginate-activated carbon embedment

An anammox and sodium alginate technology, which is applied in the field of strengthening the activity of anammox microorganisms, can solve the problems of difficult cultivation, slow growth of anammox microorganisms, and the activity is easily affected by organic matter, and achieves low biological toxicity, Enhanced resistance to organics and other unfavorable factors, low-cost application

Inactive Publication Date: 2011-09-14
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to recent studies, it is shown that anammox microorganisms grow slowly and are difficult to cultivate, and anammox microorganisms will only be active under high concentration conditions; the activity is also easily affected by organic matter; therefore, how to strengthen its activity and improve its resistance Reducing the loss of sludge during operation has become a difficulty that must be overcome in the practical application of anaerobic ammonia oxidation process

Method used

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  • Method for strengthening activity of anaerobic ammoxidized microorganisms through polyvinyl alcohol-sodium alginate-activated carbon embedment
  • Method for strengthening activity of anaerobic ammoxidized microorganisms through polyvinyl alcohol-sodium alginate-activated carbon embedment
  • Method for strengthening activity of anaerobic ammoxidized microorganisms through polyvinyl alcohol-sodium alginate-activated carbon embedment

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Experimental program
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Effect test

Embodiment 1

[0035] Using woody powdery activated carbon as a strengthening agent to enhance the activity of anaerobic ammonia oxidation microorganisms. Wooden powdered activated carbon is refined from fruit shells and wood chips. It is black fine powder in appearance, non-toxic, tasteless, with large specific surface area and strong adsorption capacity. It is suitable for water purification industries such as sugar refining, pharmaceuticals, beverages, alcohol, food, printing and dyeing, papermaking, chemical industry, industrial wastewater, etc. It is also widely used in decolorization, deodorization, refining, purification and sewage treatment of organic solvents. Wooden powdery activated carbon physical and chemical performance analysis, the analysis results are shown in Table 1:

[0036] Analysis Project

Test Data

Analysis Project

Test Data

iodine value

>900mg / g

Adsorption value of methylene blue

≥8ml

specific surface area

>1000m 2 / ...

Embodiment 2

[0045] (1) Acquisition of fixed materials: pre-treatment of woody powdery activated carbon: first rinse with tap water to remove impurities and dust, and rinse until the water is clear. Then soak in 8% hydrochloric acid solution for 24 hours, rinse with tap water and then soak in 2% sodium hydroxide for 24 hours, then rinse with tap water and distilled water, soak in normal saline for 24 hours, dry, put in anaerobic ammonia oxidation Soak in basic inorganic salt solution for 24 hours and set aside.

[0046] The basic inorganic salt solution is: KHCO 3 0.50gL -1 , MgSO 4 ·7H 2 O 0.30 gL -1 , KH 2 PO 4 0.027gL -1 , CaCl 2 0.136gL -1 , NaNO 2 0.4gL -1 , (NH 4 ) 2 SO 4 0.35gL -1 .

[0047] (2) Take out the anaerobic ammonium oxidation sludge, wash it 3 times with a phosphate buffer solution with a pH of 7.5-8.0, and set it aside after sedimentation or centrifugation.

[0048] (3) Polyvinyl alcohol (PVA)-sodium alginate (SA)-activated carbon was prepared into ...

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Abstract

The invention belongs to the field of water treatment, and relates to a method for strengthening the activity of anaerobic ammoxidized microorganisms through polyvinyl alcohol-sodium alginate-activated carbon embedment. The method comprises the following steps of: soaking activated carbon in anaerobic ammoxidized basic inorganic salt solution, and preparing an embedding medium by using polyvinyl alcohol, sodium alginate and the activated carbon into in a proportion; and uniformly mixing treated anaerobic ammoxidized sludge and the embedding medium in a volume ratio to obtain immobilized balls, and culturing to obtain the anaerobic ammoxidized microorganisms steadily coupled on the activated carbon. The invention aims at wastewater with low carbon-nitrogen ratio, and can provide a method for embedding the anaerobic ammoxidized sludge by using the sodium alginate and the polyvinyl alcohol as carriers and the activated carbon as a strengthening agent, and a technology for strengthening the activity of the anaerobic ammoxidized microorganisms and enabling the anaerobic ammoxidized microorganisms to resist the influence of adverse environment. By the method, sewage plants can run more steadily for a long time, and the conditions of actual operation management of the sewage plants are met.

Description

technical field [0001] The invention belongs to the field of water treatment, or environmental engineering, or environmental microorganisms, and relates to a method for strengthening the activity of anaerobic ammonium oxidation microorganisms. Background technique [0002] There are a lot of nitrogen-containing pollutants in modern industrial and domestic sewage. A large amount of nitrogen in water will lead to an increase in total nitrogen in water and induce eutrophication in water. The conversion of nitrogen needs to consume dissolved oxygen in water, resulting in hypoxia in water. Other nitrogen poisons humans and other organisms. At present, the nitrogen removal process adopted is nitrification and denitrification technology. Traditional denitrification technology needs to add additional organic carbon sources and aeration to meet the needs of denitrification, so the denitrification process has high operating costs and huge energy consumption. [0003] With the discov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N11/00C02F3/28C02F3/34
Inventor 贾晓珊钟玉鸣刘金苓张再利
Owner SUN YAT SEN UNIV
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