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Process and device for treating domestic sewage in high and cold areas

A technology for domestic sewage and alpine regions, applied in aerobic and anaerobic process treatment and other directions, can solve problems such as the inability to achieve sewage treatment in alpine regions, and achieve the effects of avoiding freezing, reducing phosphorus content and improving stability.

Inactive Publication Date: 2015-11-18
四川蓉加川大环保工程咨询设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the sewage treatment process in the prior art cannot better realize the sewage treatment in the alpine area; to provide a living environment in the alpine area that can effectively prevent the sewage from freezing in the process and effectively improve the sewage treatment effect. Sewage treatment process, and discloses a domestic sewage treatment device in alpine regions

Method used

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  • Process and device for treating domestic sewage in high and cold areas
  • Process and device for treating domestic sewage in high and cold areas
  • Process and device for treating domestic sewage in high and cold areas

Examples

Experimental program
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Effect test

Embodiment 1

[0037] A domestic sewage treatment process in alpine regions, comprising the following steps:

[0038] After the solid impurities in the sewage are removed by pretreatment, the sewage is continuously introduced into the treatment system of the present invention. Under the condition of an implementation temperature of 9.5°C, the low-temperature sewage flows into the anaerobic zone, the anoxic zone, and the aerobic zone in the oxidation ditch in sequence. zone, packing zone and settling zone. The aerobic zone described in the present embodiment is divided into one-stage aerobic zone and two-stage aerobic zone. After the zone, it flows through the first-stage aerobic zone, the packing zone and the second-stage aerobic zone in sequence, and finally passes through the sedimentation zone and is discharged after precipitation. There are acclimatized cold-resistant bacteria in this stuffing area. The end of the second-stage aerobic zone returns to the anoxic zone, and the return rat...

Embodiment 2

[0045] This example is a comparative example of Example 1. The difference between this example and Example 1 is that in this example, the areas set in the oxidation ditch are replaced with pools of corresponding sizes, and the sewage is realized by connecting pipes and pumps. The circulation between the pools, the equipment to realize the above process such as image 3 shown. Other conditions are the same as in Example 1 in this embodiment.

[0046] Through the above setting method, the sewage is tested. The COD test result of the sewage at the water inlet of the anaerobic zone is 338.22mg / l, and the ammonia nitrogen test result of the sewage is 29.34mg / l. The detection values ​​of COD and ammonia nitrogen in the sewage at the outlet of the sedimentation area gradually decreased, and finally stabilized at COD: 67-68 mg / l and ammonia nitrogen: 10.0-10.5 mg / l.

[0047] Through the comparison of the above-mentioned embodiment 1 and embodiment 2, it can be seen that the present ...

Embodiment 3

[0049] The difference between this embodiment and Embodiment 1 is that the strains in the filling area 4 in this embodiment are common strains instead of cold-resistant bacteria, and other conditions are the same as those of Embodiment 1.

[0050] Through the above setting method, the sewage is tested. The COD test result of the sewage at the water inlet of the anaerobic zone is 338.22mg / l, and the ammonia nitrogen test result of the sewage is 29.34mg / l. The detection values ​​of COD and ammonia nitrogen in the sewage at the outlet of the sedimentation area gradually decreased, and finally stabilized at COD: 63-64 mg / l and ammonia nitrogen: 8.0-8.5 mg / l.

[0051] Can know by above-mentioned test result, under the situation that does not use cold-resistant bacteria, adopt the form of oxidation ditch and adopt the mode of pond form and adopt cold-resistant bacteria in embodiment 2 to compare, sewage treatment effect is better, further illustrates that adopts in the present invent...

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Abstract

The invention discloses a process for treating domestic sewage in high and cold areas and discloses a device of the process. The process comprises the following steps: (1) sewage continuously flows into an anaerobic zone in an oxidation ditch and sequentially flows through an anoxic zone, an aerobic zone and a settling zone to be discharged, wherein a filler zone of a culture is arranged in the aerobic zone and the flow rate of sewage in the oxidation ditch is less than 0.15 m / s; aeration is carried out on sewage in the anoxic zone, the aerobic zone and the filler zone; and (2) sewage at the tail end of the aerobic zone returns to the anoxic zone; sewage in the settling zone partially returns to the anaerobic zone and the rest of sludge is discharged. The process and device disclosed by the invention are applicable to sewage treatment in high and cold areas and have the advantages of being simple in water treatment process, low in treatment cost, low in energy consumption, small in occupied area, excellent in treatment effect and the like.

Description

technical field [0001] The invention relates to a sewage treatment process and device, in particular to a domestic sewage treatment process and device in alpine regions. Background technique [0002] In sewage treatment, the optimal water temperature is 20-35°C, and the water temperature is below 15°C, which is low temperature. According to investigations, in high-altitude and low-temperature areas (hereinafter referred to as "alpine areas"), the annual average temperature is maintained between 2-14 °C, and the sewage temperature is around 10 °C for 4-6 months throughout the year, which belongs to the low-temperature environment. [0003] Common sewage treatment processes include CASS process and SBR process, but when these processes are used in alpine regions, there are problems such as high idle rate, difficulty in improving the efficiency of biological nitrogen and phosphorus removal, and easy freezing of the pool surface during the sedimentation and drainage stages; and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 周丽蓉
Owner 四川蓉加川大环保工程咨询设计有限公司
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