Method and equipment for aerobic/anaerobic biofilter biological denitrogenation

An anaerobic biofilter and biofilter technology, applied in the field of biological denitrification treatment of low-carbon-to-nitrogen ratio wastewater, can solve problems such as difficult and stable maintenance, and achieve the effects of simple process, small footprint, and low operating costs

Active Publication Date: 2016-05-04
EAST CHINA NORMAL UNIV +1
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Problems solved by technology

SNAD (SimultaneouspartialNitrification, AnammoxandDenitrification) technology is to use NRBC (Non-wovenRotatingBiologicalContactor) reactor to realize the denitrification process of nitrifying bacteria, denitrifying bacteria and an...

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  • Method and equipment for aerobic/anaerobic biofilter biological denitrogenation
  • Method and equipment for aerobic/anaerobic biofilter biological denitrogenation

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Embodiment Construction

[0032] The specific implementation will be described in detail below in conjunction with the accompanying drawings.

[0033] Such as figure 1The shown aerobic / anaerobic biofilter biological denitrification equipment includes a water collecting device and a biological filter device; the water collecting device includes a waste water storage tank 1, a first flow meter 101, and a peristaltic pump 201; Described biological filter device comprises biological filter 2, soft filler 3, aeration device 4, water distribution device 5, backflow pump 202, second flow meter 102, water outlet valve 401, fan 301 and gas flow meter 103; The tank 1 is used to store waste water, and the peristaltic pump 201 connects the waste water storage tank 1 and the biofilter 2 through pipelines, and transports the waste water to the biofilter 2 for nitrification reaction, and the first flowmeter 101 records and controls the flow rate pumped into the biofilter 2 The amount of waste water; the bottom of th...

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Abstract

The invention discloses a method and equipment for aerobic/anaerobic biofilter biological denitrogenation. Intermitted water supply is carried out for the biofilter, and a denitrogenation process is divided into two processes including a nitrification process and a short-cut denitrification-anaerobic ammonia oxidation coupling process: that is a half of waste water to be treated is pumped into a biofilter for aerated nitrification, ammonia nitrogen is transformed into nitrate nitrogen, at the same time most COD in the waste water is removed, and organic loads in the subsequent reactions are reduced; when the nitrification process ends, aeration is stopped, the original waste water is pumped into the biofilter, degradable organics and ammonia nitrogen are introduced for respectively providing reaction matrixes and electron donors for the short-cut denitrification and the anaerobic ammonia oxidation, and synergistic denitrogenation of denitrifying bacteria and anaerobic ammonium oxidation bacteria is carried in the biofilter. The method overcomes the problem of insufficient carbon sources in traditional biological denitrogenation technology; the low C/N ratio waste water biological denitrogenation method has low sludge outputs without secondary pollution, external carbon sources are not added, and nitrogen removal rate reaches above 90%.

Description

technical field [0001] The invention belongs to the technical field of denitrification treatment of environmental engineering wastewater, and in particular relates to a biological denitrification treatment method and device for wastewater with a low carbon-to-nitrogen ratio, and is suitable for biological treatment of high-nitrogen and low-carbon wastewater such as domestic wastewater and landfill leachate. technical background [0002] Excessive discharge of nitrogen-containing substances in wastewater can easily lead to eutrophication of natural water bodies, excessive growth of algae plants, resulting in massive death of aquatic organisms such as fish, black and smelly rivers and other serious water environmental pollution problems. Nitrogen-containing wastewater such as domestic sewage and landfill leachate must undergo strict denitrification treatment before being discharged into natural water bodies. The "Water Pollutant Discharge Standards for Urban Sewage Treatment P...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/301C02F3/302C02F2209/38C02F2209/40C02F2301/046
Inventor 谢冰孙金昭武冬黄兴华夏辉鹏沈建中李靖
Owner EAST CHINA NORMAL UNIV
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