A start-up method for synchronously removing carbon, nitrogen and suspended solids in low-carbon source wastewater by using a membrane bioreactor

A membrane bioreactor, suspended solids technology, applied in chemical instruments and methods, biological water/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problem of low nitrogen removal rate and difficult simultaneous and efficient removal of various pollutants and other problems, to achieve the effect of reducing COD and total nitrogen, saving infrastructure investment and operation management, and efficient removal

Active Publication Date: 2017-10-13
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Abstract
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Problems solved by technology

[0004] The present invention aims to solve the technical problem that the removal rate of nitrogen in the existing low-carbon source wastewater is low, and it is difficult to remove multiple pollutants simultaneously and efficiently, and provides a method for synchronously removing carbon and nitrogen in low-carbon source wastewater by using a membrane bioreactor. and suspended solids process start-up method

Method used

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  • A start-up method for synchronously removing carbon, nitrogen and suspended solids in low-carbon source wastewater by using a membrane bioreactor
  • A start-up method for synchronously removing carbon, nitrogen and suspended solids in low-carbon source wastewater by using a membrane bioreactor
  • A start-up method for synchronously removing carbon, nitrogen and suspended solids in low-carbon source wastewater by using a membrane bioreactor

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specific Embodiment approach 1

[0015] Specific implementation mode 1: The start-up method of the process of synchronously removing carbon, nitrogen and suspended solids in low-carbon source wastewater by using a membrane bioreactor in this embodiment is carried out according to the following steps:

[0016] 1. Establish a membrane bioreactor water treatment system. The system includes an inlet peristaltic pump 1, a membrane bioreactor 2, an outlet peristaltic pump 3 and an air pump 4. The membrane bioreactor is equipped with a stirrer 2-1 and a membrane module 2- 2. Air distribution device 2-3, DO measuring instrument 2-4, pH measuring instrument 2-5 and liquid level controller 2-6; water inlet peristaltic pump 1 is connected to the water inlet of membrane bioreactor 2, and water outlet peristaltic pump It is connected to the membrane module 2-2 in the membrane bioreactor, and the air pump 4 is connected to the gas distribution device 2-3 in the membrane bioreactor;

[0017] 2. Turn on the influent peristal...

specific Embodiment approach 2

[0025] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the ammonia nitrogen concentration in the artificial water distribution described in step 3 is 215 mg / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 4, the carbon-to-nitrogen ratio of the influent is 0.8:1. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a starting method of the process for synchronously removing carbon, nitrogen and suspended matter in low carbon source wastewater through a membrane bioreactor, and relates to the processes of sewage autotrophic nitrogen removal, denitrification and membrane filtration. The technical problems that the removal rate of nitrogen in existing low carbon source sewage is low and various pollutants cannot be synchronously and efficiently removed easily are solved. The method includes the steps that returned sludge is transplanted in the membrane bioreactor, and suspended solids are removed first under the filtering action of a membrane assembly; then an anaerobic microenvironment is formed on the surface of a membrane wire by controlling the hydraulic retention time, the stirring speed and the backwashing period so that anaerobic ammonium oxidation bacteria can be enriched, meanwhile, oxygen is supplied into the reactor to enrich aerobic ammonia oxidation bacteria, and thus total nitrogen can be removed; at last, organic substances are added in incoming water to induce and enrich denitrifying bacteria, hence, the organic matter can be removed, and starting is completed. Successful starting can be achieved in 86 days under the indoor temperature condition through the municipal sewage factory returned sludge, and the carbon, the nitrogen and the suspended matter in the low carbon source wastewater can be removed synchronously and efficiently.

Description

technical field [0001] The invention belongs to the field of sewage treatment and regeneration, and in particular relates to sewage autotrophic denitrification, denitrification and membrane filtration processes. Background technique [0002] With the development of industry and the improvement of people's living standards, the discharge of low-carbon source wastewater is increasing. It is difficult for low-carbon source wastewater to meet the demand of organic carbon source for denitrification in traditional denitrification process, resulting in low denitrification efficiency. On the other hand, in the face of energy crisis, water shortage and other problems, the utilization of sewage resources has become the trend of social development. Therefore, for wastewater containing higher organic carbon sources, it is more likely to convert the organic matter into energy gas methane through anaerobic fermentation for utilization. This treatment method cannot remove nitrogen, so th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/30C02F3/34
CPCC02F3/1268C02F3/301C02F3/34C02F2201/002C02F2203/006C02F2209/00C02F2209/02C02F2209/06C02F2209/14C02F2209/22C02F2209/42C02F2209/44Y02W10/10
Inventor 张肖静马永鹏杜京京张宏忠
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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