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Rapid starting method of membrane bioreactor completely-autotrophic nitrogen removal technology

A whole-process autotrophic denitrification, membrane bioreactor technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve the difficulty of reactor startup, low total nitrogen removal load, and slow growth and other problems, to achieve the effect of simple and easy-to-obtain sludge, solving slow growth and solving source difficulties

Active Publication Date: 2014-04-09
BEIJING UNIV OF TECH
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Problems solved by technology

However, the functional microorganisms ammonia oxidizing bacteria (AOB) and anammox (anammox) in the CANON process are both autotrophic bacteria, which grow slowly and are difficult to enrich. At the same time, their stability is poor, which makes it difficult to start the reactor. The total nitrogen removal load is relatively low, etc.

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  • Rapid starting method of membrane bioreactor completely-autotrophic nitrogen removal technology
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  • Rapid starting method of membrane bioreactor completely-autotrophic nitrogen removal technology

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Embodiment Construction

[0016] The reactor used in the present invention is a membrane bioreactor (MBR), and the effective volume of the reactor is 13L. An aeration device is installed at the bottom of the reactor, and the DO concentration in the reactor wastewater can be controlled by adjusting the aeration amount. The built-in agitator ensures that the mud and water are mixed evenly. The inlet pump is connected to the liquid level controller to keep the liquid level constant. The outlet water is sucked out by the peristaltic pump. The test uses artificially synthesized wastewater as the test water, and the influent matrix mainly includes 0.33-0.94g / L (NH 4 ) 2 SO 4 , 0.94~3.36g / L NaHCO 3 , while adding 0.068g / L of CaCl 2 , 0.15g / L of MgSO 4 ·H 2 O, 0.068g / L of KH 2 PO 4 .

[0017] In the present invention, the method for quickly starting the whole process of autotrophic denitrification process is as follows: in the MBR reactor, inoculate with A 2 Nitrified sludge from urban sewage treatmen...

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Abstract

A rapid starting method of a membrane bioreactor completely-autotrophic nitrogen removal technology belongs to the municipal sewage processing and recycling fields. The starting method of a completely-autotrophic nitrogen removal technology in a membrane bioreactor (MBR) comprises the following steps: inoculating nitrated sludge of the aeration tank of a municipal sewage plant, and recovering the activities of sludge at normal temperature under low ammonia nitrogen of inlet water; reducing the aeration rate and gradually increasing the ammonia nitrogen concentration to successfully enrich ammonia oxidizing bacteria; and reducing the aeration rate, reducing DO, and inducing anaerobic ammonia oxidizing bacteria to successfully start the completely-autotrophic nitrogen removal technology. Problems comprising slow starting and strict sludge inoculation requirement of a completely-autotrophic nitrogen removal technology are solved in the invention, and the rapid starting method of the shortcut nitration in the MBR realizes the efficient ammonia nitrogen removal, and provides a way for the long-term efficient and stable running of the shortcut nitration in the MBR.

Description

technical field [0001] The invention belongs to the field of urban sewage treatment and regeneration. In particular, it relates to a rapid start-up method specially used for the normal temperature membrane bioreactor CANON process. Background technique [0002] In recent years, with the rapid growth of our country's economy, the process of industrialization and urbanization has continued to advance, and water pollution has become increasingly serious, causing water quality water shortages and original resource water shortages to overlap each other, and more and more affect people's normal production. and life. Among them, nitrogen pollution is a major hazard. The 2011 China Environmental Status Bulletin issued by the Ministry of Environmental Protection pointed out that the main pollution indicators of the seven major water systems except the Huaihe River system all contain ammonia nitrogen, and the problem of eutrophication in lakes (reservoirs) is still prominent. Nitro...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 李冬梁瑜海张肖静范丹张玉龙周元正张翠丹吴青苏庆岭门绚杨胤何永平曾辉平张杰
Owner BEIJING UNIV OF TECH
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