Method for treating sewage by double-membrane system of algae bio-membrane and plate micro-filtration membrane

A technology of algal biofilm and microfiltration membrane, which is applied in biological water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc. It can reduce the impact of chemical change and the effect is difficult to improve again, so as to achieve the effect of saving material consumption, improving service life and saving energy consumption.

Inactive Publication Date: 2019-07-12
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The A² / O process has the advantages of mature technology, simple process, low operating cost, good nitrogen and phosphorus removal effects, short hydraulic retention time, and strong load resistance. It has been widely used in urban sewage treatment plants in my country, but there are also The following problems are waiting to be solved: denitrification and phosphorus removal cannot achieve good removal effect at the same time; limited by the reflux ratio, the effect of denitrification and phosphorus removal is difficult to improve again, and it will still affect the eutrophication of the receiving water body
Although this document has some explanations on algae biofilm, ultrafiltration membrane double-membrane system and its treatment of sewage, there are still some unresolved problems. This method is still in the stage of laboratory experiments, and the technology is not yet mature enough.
In addition, there are still relatively few domestic researches on the treatment of domestic sewage by double-membrane systems.

Method used

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  • Method for treating sewage by double-membrane system of algae bio-membrane and plate micro-filtration membrane
  • Method for treating sewage by double-membrane system of algae bio-membrane and plate micro-filtration membrane

Examples

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Effect test

Embodiment 1

[0024] A method for treating sewage by using an algae membrane and a flat microfiltration membrane dual-membrane system. While using algae biofilm for sewage treatment, a flat microfiltration membrane module is added for secondary treatment, which improves the recycling rate of algae biofilm. At the same time, the water quality of the effluent is also improved; the specific steps are as follows:

[0025] (1) Pretreatment of the elastic three-dimensional carrier: soak the elastic three-dimensional carrier in 1.0mol / L NaHCO 3 In the solution, soaking time: 24 hours, then rinse 4 times with deionized water, soak the obtained biofilm carrier in hydrochloric acid with a concentration of 1.0 mg / L for 12.5 hours, rinse 4 times with deionized water and dry.

[0026] (2) Preparation of algae biofilm: add BG11 medium and pretreated elastic three-dimensional carrier into the bioreactor, the volume of the medium is 8L, inoculate the algae liquid into the medium, the volume of the algae li...

Embodiment 2

[0035] A method for treating sewage by using an algae membrane and a flat microfiltration membrane dual-membrane system. While using algae biofilm for sewage treatment, a flat microfiltration membrane module is added for secondary treatment, which improves the recycling rate of algae biofilm. At the same time, the water quality of the effluent is also improved; the specific steps are as follows:

[0036] (1) Pretreatment of the elastic three-dimensional carrier: soak the elastic three-dimensional carrier in 0.05mol / L NaHCO 3 In the solution, soaking time: 23 hours, then rinse 3 times with deionized water, soak the obtained biofilm carrier in hydrochloric acid with a concentration of 0.05mg / L for 11 hours, rinse 3 times with deionized water and dry in the air.

[0037] (2) Preparation of algae biofilm: Add BG11 medium and pretreated elastic three-dimensional carrier into the bioreactor, the volume of the medium is 8L, inoculate the algae liquid into the medium, the volume of th...

Embodiment 3

[0046] A method for treating sewage by using an algae membrane and a flat microfiltration membrane dual-membrane system. While using algae biofilm for sewage treatment, a flat microfiltration membrane module is added for secondary treatment, which improves the recycling rate of algae biofilm. At the same time, the water quality of the effluent is also improved; the specific steps are as follows:

[0047] (1) Pretreatment of the elastic three-dimensional carrier: soak the elastic three-dimensional carrier in 1.5mol / L NaHCO 3 In the solution, soaking time: 23 hours, then rinse 3 times with deionized water, soak the obtained biofilm carrier in hydrochloric acid with a concentration of 2.0mg / L for 11 hours, rinse 3 times with deionized water and dry.

[0048] (2) Preparation of algae biofilm: add BG11 medium and pretreated elastic three-dimensional carrier into the bioreactor, the volume of the medium is 8L, inoculate the algae liquid into the medium, the volume of the algae liqui...

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Abstract

The invention discloses a method for treating sewage by a double-membrane system of an algae bio-membrane and a plate micro-filtration membrane. The method contains two stages: a preceding stage and alater stage. In the preceding stage, the biological membrane method is adopted: in an algae bio-membrane reactor, a carrier adhesion method is adopted for immobilized culture of algae; and after a stable algae bio-membrane is formed, the algae bio-membrane reacts with domestic sewage added therein. In the later stage, a plate micro-filtration membrane module is added to filter out a few algae andother impurities mixed in an effluent obtained after treatment of the algae bio-membrane, and the deposited algae mud is recycled into the algae bio-membrane reactor to realize reutilization. By themethod of the invention, heavy metal and nitrogen and phosphorus can be effectively removed from domestic sewage and COD is reduced; and service life of the algae bio-membrane can be prolonged and effluent quality also can be improved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to the application of a double-membrane system of algae biofilm and flat microfiltration membrane to treat sewage. Background technique [0002] With the development of my country's economy, municipal sewage and industrial sewage are increasing day by day, and people still discharge domestic sewage containing excessive heavy metals, nitrogen, phosphorus and organic matter directly into lakes, rivers and other water bodies. We know that 80% of the world's diseases are related to water. Typhoid fever, cholera, gastroenteritis, dysentery, and infectious liver disease are the five major diseases of human beings, all caused by unclean water. [0003] Among the traditional heavy metal wastewater treatment methods, the chemical precipitation method is simple in operation and cheap in raw materials, but it will generate a large amount of sludge which is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/20C02F101/30
CPCC02F1/444C02F3/32C02F2101/20C02F2101/30
Inventor 魏群毛瑞罗晓暄苏苑廖运生张生盛叶华金锂
Owner GUANGXI UNIV
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