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System and method for mainstream short-cut nitrification denitrification/anaerobic ammoxidation

A technology of anaerobic ammonia oxidation and short-range nitrification, applied in the field of water pollution control, can solve the problems of high energy consumption and insufficient carbon source in sewage treatment plants, and achieve the effect of saving energy consumption of fans, better effect, and inhibiting NOB bacteria.

Active Publication Date: 2019-10-15
DALIAN OCEAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a mainstream short-range nitrification and denitrification / anammox system and method to solve the problems of high energy consumption and insufficient carbon sources in sewage treatment plants

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  • System and method for mainstream short-cut nitrification denitrification/anaerobic ammoxidation

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Embodiment 1

[0039] refer to figure 1 The process flow diagram of , a mainstream short-range nitrification and denitrification / anammox system, including chemical flocculation tank 1, primary sedimentation tank 2, hydrolytic acidification tank 3, secondary sedimentation tank 4, and multi-cycle SBR tank 5 connected in sequence; The chemical flocculation tank 1 is provided with a water inlet, and the flocculant can be added to the water inlet pipe, or directly added to the chemical flocculation tank 1, and mixed by stirring; the multi-circulation SBR tank 5 is provided with a water outlet; the first settling tank 2, the bottom of the secondary sedimentation tank 4 and the bottom of the multi-circulation SBR pool 5 are respectively provided with a sludge collection pipeline, and the sludge collection pipeline outlet at the bottom of the primary sedimentation tank 2, the secondary sedimentation tank 4 and the bottom of the multi-circulation SBR pool 5 is connected to The same pipeline is discha...

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Abstract

The invention discloses a system and method for mainstream short-cut nitrification denitrification / anaerobic ammoxidation, and belongs to the technical field of water treatment. The method comprises the following steps: carrying out chemical flocculation precipitation on sewage to capture particulate organic matters, colloidal organic matters and phosphorus; and then carrying out anoxic hydrolysisacidification, and decomposing organic matters in wastewater into volatile fatty acids and ammonia nitrogen. A multi-cycle SBR tank is used in the next stage, through multi-step water feeding, multi-step A / O reaction and enhanced denitrification / anaerobic ammoxidation, nitrite nitrogen is removed timely, nitrifying bacteria (NOB) substrate lack is formed, NOB bacteria are eliminated in assistanceof dissolved oxygen on-line control and short sludge age, and stable mainstream short-cut nitrification denitrification / anaerobic ammoxidation denitrification is realized. The short-cut nitrificationrate of the multi-cycle SBR tank is 80% or above, and the removal rates of COD, ammonia nitrogen and TN are 87%, 98% and 88% respectively. The method is simple in control strategy and strong in automation, and has the advantages of low energy consumption, less greenhouse gas emission, good effluent quality, low sludge yield and the like.

Description

technical field [0001] The invention belongs to the field of water pollution control, and in particular relates to a mainstream short-range nitrification and denitrification / anammox system and method. Background technique [0002] With the continuous expansion of my country's cities, the rapid growth of population has brought more environmental problems. Among them, people's daily life produces a large amount of wastewater, which is collected by the urban underground pipe network and transported to major sewage treatment plants. In the process of wastewater transportation, the organic solid waste in the water undergoes natural hydrolysis, and most of them enter the water plant in the form of suspended particles or dissolved state. This type of water is relatively biodegradable, so urban domestic sewage is basically treated by biochemical methods. The main problems of traditional urban domestic wastewater treatment plants are high energy consumption and high cost of excess ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/28
CPCC02F9/00C02F3/28C02F1/5245
Inventor 徐光景刘潘
Owner DALIAN OCEAN UNIV
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