Preparation method of compound microelement nutrient capable of enhancing activity of activated sludge

A technology of compounding trace elements and activated sludge, applied in the field of water treatment, can solve the problems of limited microbial activity, poor removal of organic pollutants, nitrogen and phosphorus removal, etc.

Inactive Publication Date: 2012-05-16
MEISHU ENVIRONMENTAL PROTECTION TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For some biochemical sewage treatment systems with single water sources or obvious industry and regional characteristics, such as chemical sewage, textile printing and dyeing wastewater, and sewage treatment systems characterized by regional and industrial element deficiency, the microbial activity is affected by a single trace element or multiple trace elements. The limitation of organic pollutants or the removal of nitrogen and phosphorus is not good, and it is necessary to add some or more trace elements in a targeted manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0016] Powder 500kg of animal keratin and 500kg of soybean meal, sieve to remove particulate impurities to obtain about 900kg of powder, dissolve with 600kg of water according to the solid-to-liquid mass ratio of 1.5, and stir in the reactor at high speed for 2 hours at a stirring rate of 500rpm to fully disperse and emulsify Finally, add it into 1200kg of hydrochloric acid with a concentration of 31.5%, and keep stirring at a stirring intensity of 300rpm. Under normal atmospheric pressure, the mixed solution is heated to 110° C. and kept at constant boiling for 8 hours for hydrolysis to obtain a hydrolyzed solution. When the hydrolyzed solution was cooled to 55°C, potassium hydroxide was added to neutralize it to a pH value of 5.0, and the neutralized mixed solution was filtered to remove precipitated impurities to obtain an amino acid stock solution. The amino acid stock solution is heated and concentrated under reduced pressure, and part of the salt is analyzed, and the conc...

Embodiment example 2

[0021] Stir and dissolve 500kg of commercially available amino acid powder (the main component is branched-chain amino acid) and add a well-proportioned trace element salt in an amount of 500kg, and chelate at 80°C for 6 hours to prepare a compound trace element nutrient solution. The amino acid chelated trace element liquid is evaporated and concentrated to prepare the amino acid chelated compound trace element nutrient emulsion. The mass concentration of Zn, Cu, Ni, B, Co, Mn, Mo and Se in the complex trace element nutritional emulsion accounted for 3.75%.

[0022] A sewage treatment plant is used to treat wastewater from acrylonitrile production workshops. The incoming water is relatively simple and lacks trace elements. Sprinkle the prepared powder directly to the water inlet of the biochemical reactor, and the dosage is 1 / 1000 of the amount of activated sludge in the reactor. There is about 10t of activated sludge in the activated sludge biochemical reactor. The dosage i...

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PUM

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Abstract

The invention discloses a preparation method of a compound microelement nutrient capable of enhancing activity of activated sludge in a sewage treatment device for treating single waste water. Zinc sulfate, cupric sulfate, nickelous chloride, boric acid, cobaltous chloride, manganese chloride, sodium molybdate and sodium selenate are used as the main raw materials, and hydrolysis reaction of proteins and chelation reaction of metallic elements are performed by using organic / inorganic compound acid to form an organic acid / amino acid compound chelate. Microelement salts with different concentrations can be selected for chelation according to different water qualities and different biochemical treatment ways of sewage. The invention is a chelate containing multiple microelements capable of promoting microbial metabolism and enzyme activity.

Description

technical field [0001] The invention relates to a preparation method of a composite trace element nutrient, in particular to a preparation method of a composite trace element nutrient for improving the activity of treating single wastewater activated sludge, and belongs to the field of water treatment. Background technique [0002] Biological sewage treatment process is called activated sludge process. Activated sludge process can be divided into aerobic method and anaerobic method. Its operating principle is to use the metabolism of microorganisms to treat organic pollutants in wastewater. Therefore, in the operation of biological treatment facilities, it is necessary to create suitable environmental and nutritional conditions for microorganisms. In previous researches on anaerobic biological treatment of wastewater, people have paid more attention to In terms of temperature, pH value, toxicity and other conditions, in terms of nutrition, most of them only pay attention to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
Inventor CHEN KAIHUAXING YUN
Owner MEISHU ENVIRONMENTAL PROTECTION TECH BEIJING
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