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Method of purifying water, suitable bacteria for said method and use thereof

A technology of microorganisms and bioreactors, applied in DSM12560 Bacillus subtilis DT-1, bioreactors, bacteria and mixed bacterial populations, mixed bacterial populations, promoting water purification, can solve uneconomical, laborious biomass, etc. problems, to achieve the effect of reducing cost and energy consumption and good purification results

Inactive Publication Date: 2003-05-28
克莱沃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Producing such large quantities of biomass under sterile conditions is laborious and uneconomical; therefore a method that can produce biomass under non-sterile conditions without the risk of contamination is highly desirable

Method used

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  • Method of purifying water, suitable bacteria for said method and use thereof
  • Method of purifying water, suitable bacteria for said method and use thereof
  • Method of purifying water, suitable bacteria for said method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In addition to purifying seepage water, the present invention is particularly suitable for purifying domestic and industrial gray water. Gray water is wastewater other than toilet wastewater, such as wastewater from bathrooms, sinks, tubs or laundry rooms. The purification method of the present invention can also purify waste water from laundry, which is called black water. The method of the present invention can also be used to purify laundry and industrial waste water, which often contains large amounts of organic waste, such as oil, polycyclic aromatic hydrocarbons (PAH compounds) and / or heavy metals. The method can also purify wastewater from food factories and swimming pools. Example 1 Biomass production and start-up bioreactor

[0041] Bacillus DT-1, Pseudomonas azelaic acid DT-2 and Rhizobium DT-5 were inserted into 200ml sterilized trace salt medium (KSN) respectively, and this medium included the following components (g / l distilled water): K 2 HPO 4 ×3H 2...

Embodiment 2

[0043] Test items

[0044] parameters

[0045] The effect of purifying by the method of the invention is equal to or better than that achieved by the traditional purifying method, and the energy consumption is significantly reduced. The urban sewage treatment plant consumes 0.23kWh of energy for treating 1 cubic meter of waste water, but the energy consumption of the method of the present invention is only 0.05-1kWh. Embodiment 4 purification family black water (actual scale)

Embodiment 4

[0046] parameters

[0047] parameters

[0048] parameters

[0049] parameters

[0050] The biomass of bacterial strains DT-1, DT-2, DT-5, DT-6, DT-10, DT-12 and DT-13 was prepared and fixed on the carrier as described in Example 1, and the The total amount of biomass was weighed. One piece of carrier weighs 72±1g. When DT-1, DT-2 and DT-5 are immobilized on the carrier, a piece of carrier weighs 119±13g, that is, the wet weight of biomass on each carrier is 47±11g. When all 7 kinds of bacteria are immobilized on the carrier, a carrier weighs 172±16g, that is, the wet weight of biomass on each carrier is 91±16g. The results showed that DT-6, DT-10, DT-12 and DT-13 increased the immobilized biomass by about twofold.

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Abstract

A method of purifying waste water biologically by using three particularly suitable bacteria: Bacillus sp. DT-1, Pseudomonas azelaica, DT-2, and / or Rhizobus sp. DT-5, or mixed populations thereof. The invention further relates to the bacteria and the mixed populations and use thereof in purifying waste water. The invention further relates to a bioreactor including the bacteria.

Description

[0001] technical field of invention [0002] The present invention relates to a method for purifying wastewater in a biological manner, bacteria and mixed bacterial populations suitable for the method and uses thereof. The invention still further relates to a bioreactor comprising said bacteria or mixed population. Background of the invention [0003] Usually water is purified by physical and chemical methods, eg by sedimentation, filtration or flocculation (WO94 / 5866 and WO88 / 5334). For the removal of organic compounds and other compounds which are difficult to purify, so-called biological purification methods are also preferably used, ie the waste water to be purified is brought into contact with microorganisms which degrade the pollutants. The biological water treatment method is suitable for common water treatment plants and industrial wastewater treatment plants. Biological water treatment has been tested for water recirculation systems (FI 964141). Biological water tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/00C02F3/00C02F3/06C02F3/08C02F3/34C12N1/20C12R1/38
CPCC12N1/20C02F3/34Y02W10/10
Inventor J·欧蒂娜G·泽彻夫
Owner 克莱沃有限公司
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