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Sewage treatment process without sludge backflow for phosphorus removal

A sewage treatment and sludge return technology, which is applied in water/sludge/sewage treatment, biological water/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problem of low efficiency of phosphorus removal and achieve reduction specifications , good operation effect, and the effect of improving reaction efficiency

Pending Publication Date: 2021-05-04
境友环保科技(北京)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem solved by the present invention is that in the existing sewage treatment process, the efficiency of dephosphorization of the returning sludge in the secondary sedimentation tank or the membrane tank is relatively low.

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  • Sewage treatment process without sludge backflow for phosphorus removal

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Embodiment Construction

[0023] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and accompanying drawings of the following embodiments are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, without departing from the spirit of the present invention Any modification, substitution and improvement of parts, components and connection methods are covered under.

[0024] According to an embodiment of the present invention, there is provided a sewage treatment process that does not need to return sludge to remove phosphorus, and the process includes the following steps:

[0025] S1. Incoming water and returning clear water flow into the biological multiplication zone for denitrification and phosphorus removal;

[0026] S2. The effluent from the bi...

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Abstract

The invention discloses a sewage treatment process without sludge backflow for phosphorus removal. The sewage treatment process comprises the following steps that: incoming water and backflow clear water flow into a biological multiplication area for nitrogen and phosphorus removal treatment; effluent of the biological multiplication area flows into a first modified filler area, and suspended solids in the water are intercepted while further denitrification is carried out; effluent of the first modified filler area flows into a second modified filler area and is aerated, residual ammonia nitrogen in the water is converted into nitrate nitrogen, and residual COD is oxidized into carbon dioxide; and nitrate nitrogen in the second modified filler area flows back to the biological multiplication area to be denitrified through the denitrification effect of microorganisms to remove dissolved oxygen and nitrate nitrogen in water. The sewage treatment process without sludge return for phosphorus removal aims at solving the problem that the efficiency of sludge return for phosphorus removal by adopting a secondary sedimentation tank or a membrane tank in existing sewage treatment equipment is relatively low.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment process for removing phosphorus without returning sludge. Background technique [0002] The current biological phosphorus removal process in sewage treatment in the market relies on returning the sludge from the secondary sedimentation tank, and uses the mechanism of anaerobic phosphorus release and aerobic phosphorus absorption of sludge to remove total phosphorus in water. This method has the following disadvantages: [0003] 1. There is a problem of secondary phosphorus release in the secondary sedimentation tank, resulting in high total phosphorus in the effluent; [0004] 2. Keeping the sludge in different environments can achieve the effect of phosphorus removal, but it will also affect the treatment efficiency of other bacteria; [0005] 3. The efficiency of returning sludge to remove phosphorus is low. The concentration of the ret...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/10C02F101/16
CPCC02F3/302C02F3/308C02F2101/105C02F2101/16
Inventor 游亮
Owner 境友环保科技(北京)有限公司
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