Device and method for starting and stably maintaining municipal sewage partial nitrification

A technology for urban sewage and short-range nitrification, which is applied in chemical instruments and methods, adjustment methods for biological treatment, biological water/sewage treatment, etc. The effect of convenience and reduction of personnel management requirements and costs

Active Publication Date: 2018-11-23
BEIJING UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the methods used to achieve short-cut nitrification mainly include high-concentration free ammonia (FA) and high-concentration free nitrite (FNA), low dissolved oxygen (DO), short sludge time (SRT) combined with aeration time control. Aerobic...

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  • Device and method for starting and stably maintaining municipal sewage partial nitrification
  • Device and method for starting and stably maintaining municipal sewage partial nitrification
  • Device and method for starting and stably maintaining municipal sewage partial nitrification

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Embodiment Construction

[0030] The technical scheme of the present invention will be further explained below in conjunction with experimental implementation;

[0031] The implementation steps of the present invention are as follows;

[0032] The sewage in the city sewage raw water tank (1) enters the short-range nitrification unit (30) through the third water inlet pump (37) and the third water inlet valve (38). The single-cycle operation mode after water inlet is as follows, water inlet 20min, anoxic stirring 90min, aeration for 120min, precipitation for 30min, drainage for 20min, idle for 200min, 3 cycles / day, temperature during operation is room temperature, DO is greater than 3mg / L, pH changes with the quality of influent water (6.8-7.5), sludge concentration is maintained at 3500 ±200mg / L;

[0033] The sewage in the raw urban sewage tank (1) enters the full-process nitrification unit (4) through the first water inlet pump (2) and the first water inlet valve (3). The single-cycle operation mode after w...

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Abstract

The invention discloses a device and a method for starting and stably maintaining municipal sewage partial nitrification, which belongs to the field of municipal domestic sewage treatment. The devicemainly comprises an original water tank, a municipal sewage partial nitrification device, a complete nitrification device, a sludge treatment device and a sludge return device. The method utilizes therestore rate difference between AOB and NOB after processing the activated sludge by high temperature to start partial nitrification, and combined with the sludge treatment device to improve the operating stability of partial nitrification, so as to start and stably operate the municipal sewage partial nitrification. The device is simple in operation, high in degree of self-control, which can save aeration rate for partial nitrification and have low sludge yield, so as to reduce the processing cost.

Description

Technical field [0001] A device and method for activating and stably maintaining short-range nitrification of urban sewage related to the present invention belongs to the field of urban sewage biological treatment, and is suitable for urban sewage denitrification treatment with low carbon ratio; Background technique [0002] In recent years, the problem of eutrophication of water bodies in my country has frequently occurred. The reason is that the nitrogen and phosphorus in the water body exceed the standards. Therefore, the treatment requirements of nitrogen and phosphorus in urban sewage treatment plants are getting higher and higher; compared with the removal of phosphorus, the removal of nitrogen The problem is more urgent, and the process of denitrification is in urgent need of improvement; [0003] The short-cut nitrification and denitrification and short-cut nitrification anaerobic ammonia oxidation denitrification processes that have emerged in recent years have many advanta...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/006C02F3/303C02F3/307
Inventor 彭永臻陈建飞张建华张亮孙雅雯王淑莹
Owner BEIJING UNIV OF TECH
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