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Improved biological waste water purification reactor and method

A biological purification, reactor technology, applied in chemical instruments and methods, biological water/sewage treatment, sustainable biological treatment, etc., can solve the problems of oxygen limitation, reducing method efficiency, not being protected, etc.

Active Publication Date: 2014-01-29
VEOLIA WATER SOLUTIONS & TECH SUPPORT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Biofilms can thus only grow on the surface of spherical particles, where there is no protection from any damage that may result from collisions of spherical particles
[0015] In contrast, the carrier as disclosed in EP0750591 is large and provides the biofilm with a large surface against abrasion, the oxygen limitation of the biofilm being larger (compared to the small carriers that can be used) does not significantly reduce the efficiency of the method

Method used

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  • Improved biological waste water purification reactor and method
  • Improved biological waste water purification reactor and method
  • Improved biological waste water purification reactor and method

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Embodiment Construction

[0044] According to the diagram provided, figure 1 The prior art bioreactor shown in and in figure 2 and Figure 5 The bioreactors 1' and 1'' according to the two preferred embodiments of the present invention shown in , comprise in their lower part a space 2 for expansion and sludge removal, a fluid injection system 3, a gas injection system 4, and A packed bed 5 held by a perforated plate 6 as a roof; and, finally, a free upper zone 7 as a wash reservoir, where treated water is removed through an outlet 8 .

[0045] During the backwashing operation of the bioreactor, the fluid injection system 3 simultaneously serves as a sludge removal system, such as figure 1 , 2 , 4A, 4B and 5 are indicated by the arrows in the two directions.

[0046] The liquid to be treated arrives through the inlet 9 and is introduced into the zone 2 via the valve 12 through the fluid injection system 3 below the gas injection device 4 . When the gas is introduced by the gas injection device 4, ...

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Abstract

A biological purification reactor and process, wherein the water to be treated and oxygenated gas are sent in ascending co-currents in the same reactor comprising as a biological filtering material a packed bed and a volume of movable, hollow carriers having a protected surface area for growth of the microbial film. The purifying reactor 1 comprises a space for expansion and removal of sludge 2, a gas injection system 4, a fluid injection system 3, a biological filter comprising a packed bed 5 of particles retained in a lower part of said reactor by a perforated retention ceiling 6 against upward movement, and a volume of movable particles 10 located within the said space for expansion and removal of sludge 2. The movable particles have a higher density than the packed bed particles. The purifying method further comprises periodical back washing steps.

Description

technical field [0001] The invention relates to the field of biological purification of waste water, in particular municipal sewage, industrial waste water and distribution water to be made into drinking water. It relates in particular to a method of purification in which the water to be treated and the oxygen-containing gas are sent in ascending co-current to the same reactor or biofilter comprising a biofilter A packed bed of material and a volume of movable carriers. Background technique [0002] It is known, for example, that the biological treatment of water involves the degradation of organic impurities by the action of purifying biological substances, free or immobilized and containing various microorganisms such as bacteria, yeasts, protozoa, metazoans, etc. In methods using free biomass such as activated sludge, a high concentration of various microorganisms with a small settling capacity cannot be achieved because of the concentration of biomass obtained by sedime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/10
CPCC02F3/1226C02F3/10Y02W10/10C02F3/12C02F3/104
Inventor X·勒塔莱克M·林德高
Owner VEOLIA WATER SOLUTIONS & TECH SUPPORT
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