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Efficient precipitation device and process with ammonia nitrogen removal capacity

A high-efficiency precipitation, ammonia nitrogen technology, applied in water/sewage multi-stage treatment, water pollutants, centrifugal separation of water/sewage treatment and other directions, can solve the problems of ammonia nitrogen harm, low removal efficiency, etc. The effect of reducing economic cost and reducing purchase cost agent

Pending Publication Date: 2019-10-18
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Application Information

AI Technical Summary

Problems solved by technology

However, this new type of high-efficiency sedimentation tank can only remove suspended solids and insoluble COD, and the removal efficiency of dissolved pollutants such as ammonia nitrogen, total nitrogen, and total phosphorus is very low, and it needs to be used in combination with other unit technologies to effectively remove
[0005] In view of the defects of existing high-efficiency sedimentation tanks and the harm of ammonia nitrogen in water to the environment, the present invention proposes a technology capable of both high-efficiency sedimentation and ammonia nitrogen removal

Method used

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  • Efficient precipitation device and process with ammonia nitrogen removal capacity

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Effect test

Embodiment 1

[0069] This embodiment provides a high-efficiency precipitation technology with ammonia nitrogen removal capacity with reference to any of the above-mentioned implementation modes, and its process flow can be found in figure 1 As shown, the main equipment includes coagulation tank, flocculation tank, inclined plate sedimentation tank, sludge separator, regeneration tank and sand-water separator.

[0070] The specific steps of the high-efficiency precipitation technology with ammonia nitrogen removal ability to treat wastewater in this embodiment are as follows:

[0071] The waste water to be treated is sent into the water inlet pipe through the water inlet pump, and the upper part of the water inlet pipe is provided with a dosing port for adding coagulant and ammonia nitrogen adsorption material; the coagulant and ammonia nitrogen adsorption material enter the water inlet pipe through the dosing port to fully mix with the waste water, and then Enter the coagulation tank, and q...

Embodiment 2

[0074]Rainwater from a rainwater pumping station in Shanghai has SS concentration of 540mg / L, ammonia nitrogen concentration of 7-9mg / L, total phosphorus concentration of 1.21-1.46mg / L, and COD concentration of 160-200mg / L. After the technical treatment of Example 1 , SS, ammonia nitrogen, total phosphorus and COD removal rates were 99.6%, 91.2%, 99.8%, 85.7%. After analysis, the cost of water treatment chemicals per ton is 0.04-0.12 yuan.

[0075] In this example, the coagulant used is a composite composition of 0.50 g Fe / L ferric chloride and 1.10 g / L polyaluminum sulfochloride.

[0076] The ammonia nitrogen adsorption material used is zeolite, and its dosage at the coagulation tank is 2g / L.

[0077] The stirring speed of the coagulation treatment is 400rpm, and the hydraulic retention time is 100s.

[0078] The stirring speed of the flocculation treatment is 80rpm, and the hydraulic retention time is 5min.

[0079] The hydraulic retention time of the inclined plate sedim...

Embodiment 3

[0083] The raw water of a water purification plant belongs to the type of low temperature, low turbidity and high algae content, which is difficult to treat. The original sedimentation tank was changed to the high-efficiency sedimentation system as in Example 1 through process transformation, which saves the tank volume for the front-end treatment of ammonia nitrogen and achieves a good water purification effect. After the transformation, the algae removal rate reaches more than 95%, and the turbidity removal The rate reached 99.8%.

[0084] In this embodiment, the coagulant used is 0.03 g / L polyaluminum ferric chloride.

[0085] The ammonia nitrogen adsorption material used is zeolite, and the dosage at the coagulation tank is 1.0g / L.

[0086] The stirring speed of the coagulation treatment is 400rpm, and the hydraulic retention time is 150s.

[0087] The stirring speed of the flocculation treatment is 60rpm, and the hydraulic retention time is 8min.

[0088] The hydraulic...

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Abstract

The invention relates to an efficient precipitation device and process with ammonia nitrogen removal capacity. The whole set of precipitation device comprises a coagulation tank, a flocculation tank,an inclined plate sedimentation tank and a slime separator sequentially connected in a sewage treatment direction; a feeding hole for a coagulant and an ammonia nitrogen adsorption material is also arranged at a feeding pipe of the coagulation tank; a bottom outlet of the slime separator is further connected with a regeneration tank; the bottom of the regeneration tank is also connected with a grit-water separator; and an upper outlet of the grit-water separator returns to be connected with the regeneration tank, and a lower outlet of the grit-water separator returns to be connected to the feeding pipe of the coagulation tank. Compared with the prior art, the efficient precipitation device is good in treatment effect, easy to regulate, capable of reducing the floor area while realizing theremoval of suspended matters and ammonia nitrogen, wide in applicability and remarkable in economic benefit.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and sewage treatment, and relates to a high-efficiency sedimentation device and process capable of removing ammonia nitrogen. Background technique [0002] In recent years, high-efficiency sedimentation technology has been widely used in water purification plants and sewage treatment fields, especially in large and medium-sized water purification and treatment occasions. At present, there are hundreds of high-efficiency sedimentation tanks in the domestic projects, but the operation effect varies. The precipitation efficiency is enhanced, but this technology has limited ability to remove other pollutants, and only simply removes suspended solids, colloids and other substances and the insoluble organic substances introduced by them. [0003] With the development of industry and agriculture, a large amount of ammonia nitrogen wastewater is discharged into the environment, causing e...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/16
CPCC02F9/00C02F2101/16C02F1/5236C02F1/281C02F1/38
Inventor 周振明强王馨启庞红建袁瑶支慧安莹陈柳宇羌佳鑫王凯冲江婕
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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