Technology of synchronous removal of nitrogen, phosphorus and suspended solids

A technology for simultaneous denitrification and phosphorus removal, and suspended solids. It is used in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. problems, to achieve the effect of small footprint, high processing filtration rate and large hydraulic load

Active Publication Date: 2015-10-28
SUEZ WATER TREATMENT CO LTD
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Problems solved by technology

The DN denitrification filter has excellent performance in nitrogen removal, but the concentration of phosphorus and suspended solids in the effluent is high, and it cannot be used in areas where the sewage discharge standards are stricter (such as TP<0.5mg / L, SS<5mg / L). effective satisfaction

Method used

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  • Technology of synchronous removal of nitrogen, phosphorus and suspended solids
  • Technology of synchronous removal of nitrogen, phosphorus and suspended solids

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the content described here is only for illustration and explanation of the present invention, and is not intended to limit the present invention.

[0030] The present invention is a downward flow biological filter, which is applied to sewage treatment. More specifically, the present invention is a downward flow system relying on gravity filtration, using a heavy filter material, the filter bed is completely submerged in water, and simultaneously achieves the functions of effective denitrification, phosphorus removal and removal of suspended solids. This biological filter process can be regarded as advanced treatment, used after the secondary treatment of sewage.

[0031] exist figure 1 , figure 2 In the shown embodiment, a single V-shaped biofilter is composed of the following components: a rectangular water tank, V-shaped water inlet an...

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Abstract

The invention discloses a technology of synchronous removal of nitrogen, phosphorus and suspended solids. The technology comprises the following steps: during the filtration process, raw water is filtered downwards under the action of gravity, sequentially passes through a biological filter material layer, a fine filtration layer, a supporting layer and a filter head, and is discharged from the bottom; during the nitrogen removing process, water inflow is stopped, the liquid level is lowered, backwashing water is distributed through the filter head, the distributed backwashing water is introduced upwards into the biological filter material layer, and the accumulated nitrogen bubbles in the filter material are removed; during the backwashing process, uniform distribution of gas and water is carried out through the filter head, water is introduced into the biological filter material layer, and the biological filter pond is cleaned. The technology has the advantages of being large in hydraulic loading, small in occupied area, good in removing effects of nitrogen and phosphorus and suspended solids, good in effluent quality and simple in operation and maintenance.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a process for synchronous denitrification, dephosphorization and removal of suspended solids suitable for advanced treatment of sewage. Background technique [0002] Typical sewage water quality generally includes organic matter, nitrogen, phosphorus and suspended solids. With the increasing environmental protection norms and standards, before the treated water is reused or discharged into the environmental water body, it is necessary to effectively remove the nitrogen, phosphorus and suspended solids in the water body, especially to avoid the treated water discharged into the environmental water body Excessive nitrogen and phosphorus content causes eutrophication of the water body, and the nitrogen and phosphorus content has been strictly limited in the sewage treatment discharge standard. [0003] In terms of removing suspended solids and phosphorus, the V-type filter has a goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 裴瀚迪陆子维
Owner SUEZ WATER TREATMENT CO LTD
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