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Ammonia-adsorption-based improved SBR biological nitrogen and phosphorus removal system and method for low-carbon-source sewage

A technology for biological denitrification and sewage, applied in water pollutants, water/sewage treatment, biological sludge treatment, etc., can solve the problem of low total nitrogen removal rate, achieve high phosphorus removal rate, save dosing, aeration The effect of low energy consumption

Inactive Publication Date: 2019-09-20
ANHUI UNIVERSITY OF ARCHITECTURE
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a method for improving the SBR biological denitrification and dephosphorization of low-carbon source sewage based on ammonia nitrogen adsorption, so as to solve the problem of low total nitrogen removal rate in the case of insufficient carbon source in the existing process question

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Embodiment 1

[0034] This embodiment provides an improved SBR biological denitrification and phosphorus removal system for low-carbon source sewage based on ammonia nitrogen adsorption, including: setting one anaerobic tank, and several SBR reaction tanks (usually 6 or 8), of which the anaerobic The tank adopts a mechanical flow device as a stirring measure. When the SBR reaction tank is in an aerated state, aeration is directly used as a stirring measure. When the SBR reaction tank is in an anoxic state, it needs to maintain stirring, and a mechanical flow device is used as a stirring measure when anoxic. .

[0035] Add powdered adsorbent (modified ultrafine quartz sand powder or modified river sand can be used) to the system, and directly sprinkle the powdered adsorbent into the anaerobic pool or SBR pool. Ammonia nitrogen is adsorbed by the joint action of sludge and adsorbent.

[0036] In order for the sludge to obtain a high adsorption effect of ammonia nitrogen, it is necessary to ma...

Embodiment 2

[0047] This embodiment provides an improved SBR process that approximates this method with a beaker experiment.

[0048] Take 10L of sludge from an anaerobic tank of an urban sewage plant, 0.10g of ferric chloride (adding iron salt solution, non-directly adding solids, the same below) and stir for 2h in a closed environment, then settle for 1h. The municipal sewage plant process for the sludge collected is Carrousel 2000 oxidation ditch, with an anaerobic tank in front, and the sludge is returned to the anaerobic tank. Get the supernatant after precipitation as anaerobic sewage, measure its ammonia nitrogen concentration as 15.3mg / L, total nitrogen concentration 17.1mg / L (original sewage total nitrogen 37.7mg / L), COD Cr The concentration is 101mg / L, BOD 5 is 49mg / L, the carbon-to-nitrogen ratio of the sewage is too low, adding a certain amount of glucose makes its theoretical BOD 5 Reach 55mg / L, that is, the theoretical carbon-nitrogen ratio reaches 3.0. Since the sewage in...

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Abstract

The invention belongs to the field of water environment protection, and particularly provides an ammonia-adsorption-based improved SBR biological nitrogen and phosphorus removal system and method for low-carbon-source sewage. The method is an improvement to a traditional SBR technology, and comprises the steps of (1) adding a powdery adsorbent in the system to promote ammonia adsorption of sludge and the adsorbent and to promote settling of the sludge at the same time; (2) additionally adding an anaerobic tank; and (3) changing a specific operating procedure of an original SBR. Sewage enters an SBR reaction tank after running through the anaerobic tank, and a circulating procedure of the SBR reaction tank comprises (1) water ingress, (2) oxygen deprivation, (3) sedimentation and water discharging, and (4) aeration. The most important difference between an SBR operating procedure part of the method and the traditional SBR is as follows: firstly, the front-end anaerobic tank is added, secondly, sedimentation and water discharging are conducted immediately after the oxygen deprivation procedure is carried out, and aeration is conducted on the sludge which is obtained after sedimentation and water discharging are conducted. The method is suitable for municipal sewage with a low carbon-nitrogen ratio, moreover, the nitrogen and phosphorus removal efficiency is high, the technology is simple, and energy consumption is low.

Description

technical field [0001] The invention belongs to the field of water environment protection, specifically relates to the improvement of the traditional SBR biological denitrification and dephosphorization process, in particular to an improved SBR biological denitrification and dephosphorization system and method based on ammonia nitrogen adsorption for low-carbon source sewage. Background technique [0002] In the process of urban sewage treatment, the removal of total nitrogen and total phosphorus needs to meet a certain amount of organic matter respectively. Because the concentration of organic matter in the influent of urban sewage plants is generally low, it is difficult to remove nitrogen and phosphorus in urban sewage. Urban sewage plants usually focus on the removal of total nitrogen, and the removal of total phosphorus can be completed to a certain extent by adding chemicals. How to improve the removal rate of total nitrogen for sewage with a low carbon-to-nitrogen rati...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/02C02F101/10C02F101/38
CPCC02F1/001C02F1/281C02F1/5245C02F1/66C02F3/28C02F3/30C02F9/00C02F11/02C02F2001/007C02F2101/105C02F2101/38
Inventor 唐玉朝薛莉娉黄明李卫华
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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