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Method and device for treating waste water containing humin

A technology for rot and biological treatment, applied in the fields of animal husbandry wastewater treatment, sustainable biological treatment, water/sewage multi-stage treatment, etc. The effect of low cost and high cost efficiency

Active Publication Date: 2020-04-17
三菱化学水解决方案株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, the methods described in Patent Documents 5 to 7 have the following problems: the energy required for oxidation is huge, the equipment and reagents used for the operation also require huge costs, and they are also easily affected by inclusions.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0136] Add 5.0 parts by volume of test return water and 15.00 parts by volume of purified water to 100.0 parts by volume of test wastewater, stir, and measure the floating matter containing insoluble humin in the supernatant after 24 hours after stopping stirring Quality, the result is 12mg / L.

[0137] (The quality of suspended matter containing insoluble huminous matter in the test water / test waste water = 12.3)

Embodiment 2

[0139] Add 2.5 parts by volume of test return water and 17.5 parts by volume of purified water to 100.0 parts by volume of test wastewater, stir, and measure the floating matter containing insoluble humin in the supernatant after 24 hours after stopping stirring Quality, the result is 22mg / L.

[0140] (The quality of suspended matter containing insoluble huminous matter / the amount of suspended matter containing insoluble huminous matter in the test waste water that is returned to the water after the test=6.1)

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Abstract

The present application provides a technique for efficiently and cost-effectively removing humin in wastewater when treating waste water containing humin by membrane filtration. The method for treating huminous waste water is characterized in that it includes the following steps (i) to (iv), (i) insolubilizing the huminous matter in the waste water; (ii) in the said A separation step of separating insolubilized humin in the insolubilization step; (iii) a return step of returning the insolubilized humin separated in the separation step to the insolubilization step; (iv) separating the A membrane filtration process in which the waste water obtained in the process after separating huminous substances is subjected to membrane filtration.

Description

technical field [0001] The invention relates to a treatment method and a treatment device for waste water containing humin. More specifically, it relates to a method of performing membrane filtration on wastewater after insolubilizing and separating huminous substances in wastewater. Background technique [0002] As a method of purifying wastewater containing a hydrophobic substance, a method of filtering wastewater using a filtration membrane such as a hollow fiber membrane is known (Patent Documents 1 and 2). Since the filtration performance of the filtration membrane is degraded by gradually accumulating dirt, the filtration performance is usually restored by regularly washing the membrane. For example, a method of washing with a strong alkaline agent such as sodium hydroxide (Patent Document 3), and a method of washing with a mixed solution of hydrochloric acid or its salt and a surfactant (Patent Document 4) have been proposed. [0003] In wastewater containing hydrop...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F9/14C02F103/20
CPCC02F1/44C02F1/66C02F3/02C02F3/28C02F9/00C02F2003/003C02F2103/20Y02W10/10
Inventor 安保贵永枡田守弘
Owner 三菱化学水解决方案株式会社
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