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A system and method for mainstream short-cut nitrification and denitrification/anammox

An anaerobic ammonia oxidation and short-range nitrification technology, applied in the field of water pollution control, can solve the problems of insufficient carbon source and high energy consumption of sewage treatment plants, and achieve better effects, save energy consumption of fans, and improve denitrification rate.

Active Publication Date: 2022-03-01
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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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 mainstream short-range nitrification and denitrification / anammox system and method, belonging to the technical field of water treatment. Sewage undergoes chemical flocculation and precipitation to capture particulate organic matter, colloidal organic matter and phosphorus; followed by anaerobic hydrolysis and acidification, the organic matter in the wastewater is decomposed into volatile fatty acids and ammonia nitrogen. The next stage is the multi-cycle SBR pool. Through multi-step water inflow and multi-step A / O reaction, denitrification / anaerobic ammonium oxidation is strengthened, nitrite nitrogen is removed in time, and nitrifying bacteria (NOB) substrate deficiency is formed, supplemented by dissolution Oxygen online control and short sludge age eliminate NOB bacteria to achieve stable mainstream short-cut nitrification and denitrification / anammox denitrification. The short-cut nitrification rate of the multi-circulation SBR tank is above 80%, and the removal rates of COD, ammonia nitrogen and TN are 87%, 98% and 88% respectively. The method has the advantages of simple control strategy, strong automation, low energy consumption, less greenhouse gas emissions, good effluent quality, and low sludge output.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F3/28
CPCC02F9/00C02F3/28C02F1/5245
Inventor 徐光景刘潘
Owner DALIAN OCEAN UNIV
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