Multistage method and equipment for wastewater treatment

A treatment equipment, multi-stage technology, applied in multi-stage fields, can solve problems such as unfavorable sludge characteristics, inability to realize concentration gradient, inability to realize process control, etc., to achieve the effect of cost reduction and installation cost avoidance

Inactive Publication Date: 2016-11-16
天津青莱科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] Therefore, at present, the advantageous concentration gradients theoretically obtainable in plug flow reactors cannot be realized in practice, and neither can the reliable process control that can be achieved by fully mixed SBR equipment, where the concentration remains at the same level throughout the reactor volume, which makes it possible to obtain representative dynamic information
Furthermore, small concentration variations within fully mixed equipment lead to unfavorable sludge properties

Method used

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  • Multistage method and equipment for wastewater treatment
  • Multistage method and equipment for wastewater treatment
  • Multistage method and equipment for wastewater treatment

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Embodiment Construction

[0053] The invention will now be described in further detail with reference to the accompanying drawings and exemplary embodiments of the invention, which, however, should not be construed as limiting.

[0054] refer to figure 1 , which shows a conventional plug-flow BNR plant comprising an elongated reactor tank 1 and an external clarifier 2 . A waste water feed 3 is introduced at one end of the tank reactor 1 and exits at the other end as biologically treated effluent 4 . The effluent 4 flows into the external clarifier 2 , and the effluent 5 of purified water from which sludge has been removed is discharged from the external clarifier 2 . A portion 6 of the sludge separated in the clarifier is recycled to the waste water feed 3 and mixed therewith to produce a mixed liquor. The tank reactor 1 is divided into an anaerobic section or section 7 , an anoxic section or section 8 , and an aerobic section or section 9 . Aeration grids are provided in the aerobic zone for injecti...

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Abstract

The invention provides a multistage method for removing nitrogen and/or phosphorus from wastewater and equipment for the method. Fed wastewater is subjected to aeration or biological treatment in a flow channel in the process of passing through an aeration unit and a non-aeration unit of a reactor. The reactor is provided with at least two inlets used for introducing the fed wastewater and at least two outlets for draining the treated wastewater, and the inlets are the outlets are spaced according to the length of the reactor. The wastewater flow passes through the reactor in a push-flow mode on the whole, introducing of the fed wastewater is changed from one inlet to the other inlet, and vice versa; draining of the treated water is changed from one outlet to the other outlet, and vice versa. Thus, a technology which is lower in price and more efficient is provided for purifying the wastewater.

Description

technical field [0001] The present invention relates to a multi-stage process for the removal of nitrogen and / or phosphorus from wastewater in a treatment plant wherein the waste-water feed is aerated and biologically treated during passage through a reactor flow path , and to a processing device for performing such a method. [0002] In this connection, the term "wastewater" refers to all kinds of sewage containing organic matter and nutrients (e.g., nitrogen and phosphorus-containing compounds), such as domestic waste water, municipal waste water, sewer sewage, industrial waste water, underground and surface runoff water etc., and their mixtures. Background technique [0003] Due to population growth and urbanization worldwide, the production of used and therefore often polluted water has rapidly increased and sewage treatment has become a major social problem worldwide. The reason polluted water has become such a big problem is the ability of sewage to alter discharge i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16C02F101/30
CPCC02F3/301C02F3/302C02F3/308C02F2101/105C02F2101/16C02F2101/163C02F2101/30C02F2301/046
Inventor 徐桂泉
Owner 天津青莱科技有限公司
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