A multi-phase process and plant for treatment of wastewater
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: 2008-10-01
WASTE WATER CONTROL
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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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[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]Referring to FIG. 1 , there is shown 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 inj...
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A multi-phase process and a treatment plant for this process for removal of nitrogen and / or phosphorous from wastewater, wherein a wastewater feed is aerated and biologically processed during flow passage through aerated and non-aerated sections of a reactor. The reactor is provided with at least two inlet openings for introducing the wastewater feed and at least two outlet openings for discharging processed wastewater, spaced apart along the length of the reactor. The flow of wastewater through the reactor is performed in a substantially plug-flow manner and the introduction of wastewater feed is changed from one of the inlet openings to another of the inlet openings and vice versa, and the discharge of processed wastewater is also changed from one of the outlet openings to another of the outlet openings and vice versa. Hereby a cheaper and more effective technology for purification of wastewater is provided.
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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Patent Timeline
Login to View More IPC IPC(8): C02F3/30
CPCC02F3/006C02F3/301C02F3/308C02F2209/04C02F2209/14C02F2209/15C02F2209/18C02F2209/22C02F2209/40Y02W10/10
Inventor 马里纳斯·K·尼尔森
Owner WASTE WATER CONTROL