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Phosphorus removing method for municipal sewage plant

A technology of urban sewage and treatment plants, which is applied in water/sewage treatment, neutralized water/sewage treatment, water/sludge/sewage treatment, etc., and can solve the problems of poor treatment effect, high requirements for operation and management, and complicated processes, etc. question

Inactive Publication Date: 2008-11-12
HUBEI UNIV
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing domestic phosphorus removal process is mainly biological phosphorus removal, the process is complicated, the investment is increased, the operation and management level is high, the treatment effect is not good in practical application, and it is difficult to meet the requirements of phosphorus removal index

Method used

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  • Phosphorus removing method for municipal sewage plant
  • Phosphorus removing method for municipal sewage plant

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Embodiment Construction

[0007] The present invention will be further described in detail below in conjunction with the description of the drawings and the specific embodiments:

[0008] Embodiment I: An iron filings packing layer (3) is set at the hydrolysis acidification tank of a municipal sewage treatment plant. The influent water flows into the structure (2) and flows through the iron filings filler layer (3). Under the acidic environment of the hydrolysis acidification tank, iron and the impurity carbon in the iron filings form countless tiny galvanic cells to produce internal electrolysis. Fe generated at the anode in the microbattery 2+ It reacts with phosphate in the water to form a precipitate, which plays a role in dephosphorization. Under the aeration conditions of the subsequent sections, the Fe in the inflowing water 2+ Fe is formed 3+ , It reacts with the phosphate ion in the water to produce iron phosphate and other precipitates, which are separated from the water to further remove the pho...

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Abstract

The invention relates to a method for dephosphorization in a municipal sewage plant, belonging to the water treatment field. In the method, a scrap iron packing layer is arranged in a hydrolysis and acidification pool (an adjusting pool, a catchment well, etc.) in the municipal sewage plant; with an anaerobic and acidic environment formed by sewage water in a structure, the internal electrolysis effect occurs in scrap iron to generate dephosphorization ions Fe<2+> which are oxidized into Fe <3+> in the subsequent aeration procedures; two kinds of ions and phosphor in the sewage water respectively generate Fe<3>(PO<4>)<2> precipitation and Fe PO <4> precipitation; and the sediment sinks, thereby achieving the aim of dephosphorization in the sewage water. A backflush pipe is arranged under the scrap iron packing layer. The method has low cost and operation expenses, does not need to change the prior flow of the sewage treatment plant, is simple and feasible, has the effects of internal electrolysis and flocculation, effectively dephosphorizes and has good synergistic effect on organic pollutant in the sewage water, good treatment effect and wide application prospect in the municipal domestic sewage treatment.

Description

Technical field [0001] The invention relates to a water treatment process, in particular to a method for removing phosphorus from urban domestic sewage. Background technique [0002] As the Chinese government pays increasing attention to environmental protection, sewage treatment plants have been built in various places, and the rate of urban sewage treatment in my country is rapidly increasing. However, due to economic and technological constraints, sewage treatment plants still mainly remove organic pollutants, and most of them do not have the ability to remove nitrogen and phosphorus. A large amount of nitrogen and phosphorus in domestic sewage are discharged into natural water bodies, causing eutrophication of water bodies. Nutrients such as nitrogen and phosphorus continuously enter slow-flowing water bodies such as lakes, reservoirs, etc., causing abnormal proliferation of certain characteristic algae (mainly cyanobacteria, green algae, etc.), resulting in decreased water t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/58C02F1/66C02F3/28C02F1/52C02F101/10
Inventor 胡细全李兆华
Owner HUBEI UNIV
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