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Ion-exchange membrane microalgae sewage treatment system and method

A sewage treatment method and ion exchange membrane technology, which are applied in biological water/sewage treatment, water/sludge/sewage treatment, energy and wastewater treatment, etc., can solve the problem of unfavorable engine use or human and animal use, increase sewage treatment cost, waste net Water resources and other issues, to achieve the effect of simple structure, low cost and carbon emission reduction

Active Publication Date: 2018-08-21
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when applied on a large scale, this method needs to invest a large amount of clean water resources to dilute the sewage, which will greatly increase the cost of sewage treatment while wasting clean water resources
At the same time, after microalgae absorb a large amount of heavy metals, their downstream products are mainly biodiesel, nutritional products, skin care products, etc., which will be highly toxic and not conducive to the use of engines or humans and animals.

Method used

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  • Ion-exchange membrane microalgae sewage treatment system and method
  • Ion-exchange membrane microalgae sewage treatment system and method
  • Ion-exchange membrane microalgae sewage treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: utilize microalgae and the method for ion-exchange membrane treatment domestic sewage, carry out as follows:

[0043] Step 1: Determination of physical and chemical parameters of sewage: Determining the concentration of various ions in sewage 16: Specifically, the concentration of anions and cations in sewage can be measured by ion chromatography; anions are anionic inorganic salts such as nitrogen, phosphorus, and sulfur, and cations are potassium, sodium, and calcium Cationic salts such as magnesium. The anion content measured in this embodiment includes nitrate content of about 800 mg / L, chloride ion content of about 85 mg / L, and hydrogen phosphate content of about 400 mg / L; among the cations, sodium ions are the most abundant, about 460mg / L.

[0044] Step 2: Calculation of the optimal area ratio of the anion / cation exchange membrane: According to the measured physical-chemical parameters of the sewage, test the permeation rate of various ions on the a...

Embodiment 2

[0049] Embodiment 2: utilize microalgae and the method for ion-exchange membrane processing agricultural sewage, carry out as follows:

[0050] Step 1: Determination of physical and chemical parameters of sewage: determine the concentration of various ions in sewage 16, and measure the concentration of anions and cations in sewage by ion chromatography; anions are anionic inorganic salts such as nitrogen, phosphorus, and sulfur, and cations are potassium, sodium, calcium, and magnesium and other cationic salts. According to this embodiment, the agricultural sewage to be treated has a relatively high concentration of nitrogen and phosphorus, and the concentration of dihydrogen phosphate is as high as 3380 mg / L; and the most abundant cation is potassium ion, which is about 1500 mg / L.

[0051] Step 2: Calculation of the optimal area ratio of anion / cation exchange membranes: According to the measured physical-chemical parameters of sewage, test the permeation rates of various ions...

Embodiment 3

[0055] Embodiment 3: utilize microalgae and the method for ion-exchange membrane processing agricultural sewage, carry out as follows:

[0056] Step 1: Determination of sewage physical-chemical parameters: determine the concentration of various ions in sewage 15, and measure the concentration of anions and cations in sewage by ion chromatography; anions are anionic inorganic salts such as nitrogen, phosphorus, and sulfur, and cations are potassium, sodium, calcium, and magnesium and other cation salts; the concentration of nitrate in the agricultural sewage to be treated is the highest, up to 1700mg / L; and the cation is mainly ammonium, with a concentration of about 1460mg / L.

[0057] Step 2: Calculation of the optimal area ratio of anion / cation exchange membranes: According to the measured physical-chemical parameters of sewage, test the permeation rates of various ions on the anion exchange membrane and cation exchange membrane per unit area per unit time, and according to th...

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Abstract

The invention discloses an ion exchange membrane type microalgae sewage treatment system and method. The ion exchange membrane type microalgae sewage treatment method is characterized by including the following steps of A system construction, wherein a system comprises a gas source, a microalgae culture cavity and a sewage treatment cavity, a gas outlet is formed in the top of the microalgae culture cavity, a drain opening is formed in the bottom of the sewage treatment cavity, a gas source is communicated with the microalgae culture cavity and provides a substrate for microalgae growth, the microalgae culture cavity and the sewage treatment cavity are communicated, and meanwhile an anion exchange membrane and a cation exchange membrane are arranged on a channel through which sewage enters the microalgae culture cavity; B reactor inoculation, wherein sterilized clean water is inoculated with an activated microalgae strain of certain concentration and then is transferred into the microalgae culture cavity. The ion exchange membrane type microalgae sewage treatment system is simple in structure, convenient to operate, low in cost, wide in function range and capable of being widely applied to environmental protection and biology and other fields and has good application prospects.

Description

technical field [0001] The invention relates to a system and method for treating sewage by using microalgae, in particular to an ion exchange membrane type microalgae sewage treatment system and method. Background technique [0002] At present, due to the soaring world population, rapid economic development and environmental deterioration, many countries are facing a serious shortage of fresh water resources, especially countries and regions that are not rich in water resources. According to statistics, about 1 billion people around the world do not have access to safe drinking water, and more than half of the world's hospitalized patients are infected with sewage. Therefore, solving the problem of water shortage reasonably and effectively has become the top priority of today's society. In 2009, the global annual water consumption was about 3.91×10 12 m 3 , more than half of which will be discharged into the environment as waste water, causing serious pollution to the env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/32
CPCY02W10/37
Inventor 付乾常海星黄云廖强朱恂李俊叶丁丁熊伟
Owner CHONGQING UNIV