Combined treating method for reclaimed water reuse

A treatment method and technology for reclaiming water, applied in the field of environmental engineering, can solve the problems of low removal effect, poor removal effect of toxic and harmful organic substances, etc., and achieve the effect of good effluent quality, reducing doubts about the safety of reclaimed water, and high effluent safety.

Active Publication Date: 2009-09-09
TIANJIN MUNICIPAL ENG DESIGN & RES INST
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  • Claims
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Problems solved by technology

[0009] Practice has proved that this process has a good effect on removing BOD, COD, and SS, and has a certain removal effect on ammonia nitrogen, but the removal effect is relatively low, generally below 10%, and the removal effect on toxic and harmful organic substances is also relatively poor.

Method used

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  • Combined treating method for reclaimed water reuse
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  • Combined treating method for reclaimed water reuse

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Embodiment Construction

[0034] Below in conjunction with specific embodiment, further illustrate the present invention.

[0035] (1) Raw water

[0036] Taking the secondary effluent of a sewage treatment plant as the raw water, the design effluent quality of the plant during construction is:

[0037] BOD 5 ≤30mg / L; COD≤120mg / L; SS≤30mg / L; NH 3 -N≤25mg / L.

[0038] In the actual operation process, due to the relatively large amount of industrial wastewater in the sewage treatment plant, the COD and ammonia nitrogen in the effluent cannot meet the design standards.

[0039] During the test period, the actual influent water quality of the combined treatment unit is: influent CODcr between 21.44~140.77mg / l, influent ammonia nitrogen between 5.11~102.61mg / l, influent total nitrogen in 32.95~51.62mg / l The total phosphorus in the influent is between 2.07~12.30mg / l, and the turbidity in the influent is between 6.43~13.69mg / l.

[0040] (2) Processing scale

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Abstract

The invention belongs to the field of environmental engineering, in particular to a high-safety combined treatment method for reclaimed water reuse. The reclaimed water reuse combined treatment method of the present invention is combined as follows: use the secondary effluent of the sewage treatment plant or water that meets the water quality requirements of the same type as the source water, and undergo ozone pre-oxidation, coagulation, precipitation, sand filtration, microporous filtration, ozone Oxidation, activated carbon adsorption, and reuse after disinfection. The present invention is characterized by strong adaptability to the change of influent water quality, flexible operation mode, high safety of reclaimed water effluent, good effluent water quality, and easy acceptance by users, which can reduce reclaimed water users' doubts about water safety, and is conducive to expanding the reclaimed water market.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a high-safety combined treatment method for reclaimed water reuse. Background technique [0002] my country is one of the 13 water-poor countries in the world. The per capita water resources are only 1 / 4 of the world's average level, and the time and space distribution is uneven. After years of research, it is generally believed that the reuse of reclaimed water is an effective way to solve the problem of water shortage. one. The reclaimed water reuse process affects the safety of reclaimed water use, also affects the quality of reclaimed water, and ultimately affects the promotion of users. [0003] Sewage has been turned into resources after advanced treatment, and has been recognized as the second water source. Sewage recycling is not only an effective measure to save water, but also plays a pivotal role in protecting water sources, reducing pollution, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F1/78C02F1/52C02F1/50C02F1/28
Inventor 赵乐军王玉秋刘文亚曹仲宏王秀朵
Owner TIANJIN MUNICIPAL ENG DESIGN & RES INST
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