Phosphorus removal agent and sewage phosphorus removal method

A technology for removing phosphorus and sewage, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc. Easy maintenance, low phosphorus removal cost, and improved phosphorus removal stability

Pending Publication Date: 2022-06-28
余姚首创污水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The characteristics of rural domestic sewage in my country: small water volume, scattered discharge, complex water quality, and large regional differences between rural areas. The technology used must meet the actual operation and maintenance needs, but the existing technology cannot completely solve the problem of rural domestic sewage treatment, resulting in Sewage treatment facilities in most rural areas cannot operate effectively for a long time
[0003] If phosphorus is removed by resin adsorption, the total phosphorus removal can reach more than 95%, and the inorganic phosphorus content in water can be reduced to 0.02ppm; the resin after the regeneration stage can still maintain the original phosphorus removal effect. The disadvantages are: a. Resin material adsorption It is necessary to filter the influent water before, and the influent water is required to be free of impurities. After the impurities are mixed with the resin, it will have a great impact on the phosphorus removal effect. The polluted resin is difficult to clean, and the operating conditions are harsh; b. The flow rate of the resin adsorption process is controlled at 100mL / h, for a terminal with a daily processing capacity of 100t, the inflow and outflow flow is kept at 4m 3 / h, it is suitable for a large amount of resin materials in the terminal, the resin materials are expensive, and the cost of a large amount of investment is too high; c, the site that needs to build adsorption units and regeneration units, resin materials still need to invest a lot of manpower and material resources for transshipment during operation, therefore, Only considered for emergency treatment, not suitable for promotional use in the terminal
[0004] For example, membrane filtration for phosphorus removal requires two to three times the membrane area of ​​the phosphorus removal tank to achieve the desired effect. The cost of the membrane is high, resulting in high cost
[0005] For example, chemical flocculation for phosphorus removal is applied in various urban sewage treatment plants, and the phosphorus removal efficiency is above 60% on average, but it is difficult to keep the total phosphorus concentration in the effluent below 1mg / L, and the disadvantages are as follows: a. Affect the color of the effluent; b. If it is sensitive to pH and the dosage is too large, it will cause secondary pollution of phosphorus; c. The amount of chemical dosage is closely related to the concentration of phosphorus. The water quality of rural domestic sewage changes greatly. It is difficult to achieve the ideal state; d. The amount of excess sludge produced is huge, and the weekly chemical ratio, chemical replenishment, and sludge transportation all increase the workload of daily operation and maintenance.
Therefore, the chemical agent flocculation method for phosphorus removal is more suitable for the treatment mode of urban sewage treatment plants with sound facilities, not suitable for the decentralized rural sewage treatment mode, and there is still a lack of a more complete operating mechanism

Method used

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  • Phosphorus removal agent and sewage phosphorus removal method
  • Phosphorus removal agent and sewage phosphorus removal method
  • Phosphorus removal agent and sewage phosphorus removal method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This pilot is located in Xiejialu Village, north of Simen Town, Yuyao City, Zhejiang Province. It treats tail water after denitrification by A / O process, and mixes iron filings and calcium carbonate particles with a mass ratio of 2.5:1 to form a phosphorus removal agent. Phosphorus agent is filled in each area of ​​the flow channel formed by the first and second plates of the plate body, the required iron filings are 2.5t, the calcium carbonate is 1t, the treated water volume is 43t / d, and the volume of the phosphorus removal device is 8.5m. 3 Left and right, 7.8m*1.2m*0.9m, the phosphorus removal agent layer is about 60 cm high, and the distance between the first plate and the second plate is about 1.5 meters.

[0041] The sewage to be treated is 1.5-1.8m 3 The flow rate of / h is transported to the bottom of the first end of the flow channel, flows into the gap at the bottom end of the plate body, flows through the phosphorus removing agent, and then flows from the top...

Embodiment 2

[0047] This pilot is located in Fanzhou Village, Yangming Street, Yuyao City, Zhejiang Province. The pilot has been running since October 2021. The tail water after denitrification by the A / O process is treated with iron filings and calcium carbonate particles in a mass ratio of 1.8:1. Mixed to form a phosphorus removal agent, the phosphorus removal agent is filled in each area of ​​the flow channel formed by the first and second plates of the plate body. Device tank volume 22m 3 , width 4m*length 5m*height 1.1m, the phosphorus removal agent layer is about 60 cm high, and the distance between the first plate and the second plate is about 1.5 meters.

[0048] The sewage to be treated is 4.6-5m 3 The flow rate of / h is transported to the bottom of the first end of the flow channel, flows into the gap at the bottom end of the plate body and flows through the phosphorus removing agent, and then flows over the top of the second plate body. See Table 2 for some data on the phospho...

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Abstract

The invention discloses a phosphorus removal agent and a sewage phosphorus removal method applying the phosphorus removal agent, scrap iron and calcium carbonate particles are mixed according to the mass ratio of 1.5: 1-3: 1 to form the phosphorus removal agent, common scrap iron and calcium carbonate particles are compounded and mixed according to the limited mass ratio to form the phosphorus removal agent, and it is found in tests and distributed rural sewage treatment practices that the phosphorus removal agent is good in stability and high in phosphorus removal efficiency. The total phosphorus in the effluent is kept at about 1mg, in addition, the scrap iron can be obtained from large ranges such as factories, secondary utilization of wastes is realized, the price of the calcium carbonate particles is low, and the total phosphorus removal cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of phosphorus removal from sewage, in particular to a phosphorus removal agent and a method for removing phosphorus from wastewater using the phosphorus removal agent. Background technique [0002] The characteristics of rural domestic sewage in my country: small water volume, scattered discharge, complex water quality, and large regional differences in each rural area. The technology used must meet the actual operation and maintenance needs, but the existing technology cannot completely solve the problem of rural domestic sewage treatment, resulting in Therefore, most of the sewage treatment facilities in rural areas cannot operate effectively for a long time. [0003] If the phosphorus removal is carried out by resin adsorption, the total phosphorus removal can reach more than 95%, and the inorganic phosphorus content in the water can be reduced to 0.02ppm; the resin after the regeneration stage can still m...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C02F1/52C02F1/461C02F101/10
CPCC02F1/5236C02F1/46176C02F2101/105C02F2305/14
Inventor周佳飞陈国强许秋红柴天楠王叶挺陈伟达阮铃莉张财炯
Owner余姚首创污水处理有限公司