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Biological treatment method and apparatus for organic containing water

A technology of biological treatment and treatment device, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, osmosis/dialysis water/sewage treatment, etc., can solve the problem of RO membrane desalination performance decline, etc.

Active Publication Date: 2009-06-24
KURITA INDUSTRIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Proliferating microorganisms become the cause of clogging the RO membrane, thereby reducing the desalination performance of the RO membrane

Method used

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  • Biological treatment method and apparatus for organic containing water
  • Biological treatment method and apparatus for organic containing water
  • Biological treatment method and apparatus for organic containing water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0061] figure 1 It is a schematic diagram of the biological treatment apparatus (hereinafter simply referred to as "treatment apparatus") 100 of organic matter-containing water used in the present invention. The treatment device 100 includes an anaerobic biological treatment tank (hereinafter referred to as “reactor”) 110 , a membrane separation device 112 , and a reverse osmosis membrane device 114 . A raw water pipe 130 is connected to the inlet of the reactor 110 . The reactor 110 is connected to the membrane separation device 112 through the treatment liquid pipe 132 , and the membrane separation device 112 is connected to the reverse osmosis membrane device 114 through the separation water pipe 134 . A permeated water pipe 136 is connected to the outlet of the reverse osmosis membrane device 114 .

[0062] The first heat exchanger 121 is provided in the pipeline of the raw water pipe 130 , and the second heat exchanger 122 is provided in the pipeline of the permeated wa...

Embodiment 1

[0075] As Example 1, the simulated figure 1 Experiments were performed on the experimental apparatus obtained from the processing apparatus 100 shown. The reactor 110 of the experimental device has an effective volume of 1m 3 , Hydraulic retention time 0.5 day operation. In the reactor 110, the granular sludge taken out from the anaerobic reactor for treating methanol is domesticated with a liquid to be treated described later, and is kept as a planktonic sludge. The concentration of the planktonic sludge in the reactor 110 is 4000 mg / L, 40% of the existing amount (compared with wet weight) is the methanogenic flora, and 60% is the self-digested residue of the methanogenic flora.

[0076] As water to be treated, organic matter-containing water having a total organic matter carbon concentration of 750 mg / L, a nitrogen concentration of 218 mg / L, and a phosphorus concentration of 1.0 mg-P / L was used. The composition of the total organic matter is tetramethylammonium hydroxide ...

Embodiment 2

[0080] In Example 2, instead of the UF membrane used in Example 1, an MF membrane with a pore diameter of 400 nm was used. Other than that, when the experiment was performed under the same conditions as in Example 1, the TOC concentration of the separated water from the membrane separation device equipped with the MF membrane was the same as in Example 1, and was in the range of 3 to 4 mg / L. In addition, the flow rate of the membrane separation device 112 was maintained at 1.0 m / day, and the flow rate when the separated water was treated with the reverse osmosis membrane device 114 in the same manner as in Example 1 was maintained at the original 90 m even after 20 hours from the beginning of water flow. %. On the other hand, the water passage resistance was a maximum of 40 kPa, which was higher than that of Example 1. In the sludge in the reactor 110, since the average diameter of the methanogenic bacteria group is 800nm, it is presumed that when the MF membrane is used, the...

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Abstract

The present invention provides a biological treatment device and method for preventing separation membrane pollution when biological treatment of organic matter-containing water and raw water for producing pure water. Anaerobic sludge containing methanogenic bacteria group is held in a reactor (110). Organic matter-containing water containing monomer organic matter (tetramethyl ammonium hydroxide) as main substance capable of being decomposed by methanogenic bacteria group biology as water to be treated is supplied to the reactor (110) from a raw water pipe (130), and is carried out with anaerobic treatment by methanogenic bacteria group. The treatment liquid obtained with the anaerobic biological treatment is carried out solid-liquid separation by using a membrane separation device (112)arranged outside the reactor (110), and separation water without condensate is obtained. The separation water is carried out desalination treatment with reverse osmosis membrane device (114) to become raw material for producing pure water.

Description

technical field [0001] The present invention relates to a biological treatment method and device for anaerobic treatment of water containing organic matter, and in particular to a biological treatment method and device for biological treatment of waste water as raw water for pure water production. Background technique [0002] Compared with the anaerobic microbial community, the aerobic microbial community is considered to have the ability to decompose a variety of organic matter. Therefore, aerobic biological treatment using aerobic microbial flora is suitable for treating wastewater containing complex high molecular (polymer) compounds (such as food wastewater). In addition, since the hydrolysis rate of high-molecular organic matter is slow in anaerobic biological treatment, it is generally necessary to set the hydraulic retention time to 30 days or more. In contrast, the standard hydraulic retention time for aerobic biological treatment is about 0.5 days. [0003] In re...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/28C02F1/44
CPCY02A20/124Y02A20/131Y02E50/30
Inventor 安井英齐百崎胜彦
Owner KURITA INDUSTRIAL CO LTD
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