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Sewage treatment method and treatment system

A technology of sewage treatment system and sewage treatment method, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, centrifugal separation water/sewage treatment, etc. Water volume and effluent quality, limited application scenarios, etc., to achieve the effect of reducing sludge production, enhancing coagulation effect, and increasing application scenarios

Pending Publication Date: 2022-07-12
ANHUI PUSHI ECOLOGICAL ENVIRONMENT ENG
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, when the magnetic mud is separated from the solid-liquid, the way of scraping the mud by the scraper in the solid-liquid separation device is likely to leave sludge, resulting in sludge accumulation, which affects the amount and quality of the effluent water; on the other hand, to ensure the separation and quality of the magnetic mud For the recovery of magnetic media, the height of each structure in the existing magnetic separation technology process route needs to be lowered along the process. In the overall treatment process, the height difference between the front and back of the structure is required to be large. It is necessary to raise the front-end system or lower the rear-end sludge tank to ensure self-flow. Application scenarios are limited

Method used

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  • Sewage treatment method and treatment system
  • Sewage treatment method and treatment system

Examples

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Embodiment 1

[0039]In this embodiment, the water body to be treated is a typical river channel, and the influent parameters mainly include total phosphorus (TP) and suspended solids (SS). The designed influent water quality is 5000 cubic meters per day, and the designed influent water quality is TP≤4mg / L, SS≤200mg / L; the designed effluent water quality index is required to meet the Class A standard of TP≤0.5mg / L, SS≤10mg / L . The sewage treatment system is used for treatment. The specific processing method is as follows:

[0040] After the raw water (sewage to be treated) enters the coagulation reaction tank 1, add magnetic powder, coagulant, flocculant and other chemicals into the coagulation reaction tank 1, so that the pollutants in the raw water form flocs with magnetic powder as the core , and flow into the solid-liquid separation device 2 with the overflow port of the coagulation reaction tank 1 (the solid-liquid separation device 2 selects a magnetic microfilter containing a magnet...

Embodiment 2

[0047] This embodiment is the same as embodiment 1 in terms of water quality and quantity and the use of a treatment system. For this treatment system, long-term monitoring of the concentration of suspended solids in the effluent of the system is carried out, and the monitoring results are as follows: Figure 4 shown:

Embodiment 3

[0052] This example is the same as Example 1 in terms of water quality and water quantity and the use of the treatment system. Since the construction method of each structure is changed, the overall height difference of the system is only about 4 meters, so there is no need for elevated or buried treatment.

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Abstract

The invention provides a sewage treatment method. The sewage treatment method comprises the following steps: S1, adding magnetic powder into sewage; s2, carrying out solid-liquid separation by using solid-liquid separation equipment to obtain original magnetic sludge; s3, performing rotational flow sand setting treatment on the original magnetic sludge, and guiding supernate separated from the original magnetic sludge into the sewage in the S1, so that the concentration of the original magnetic sludge is increased to form high-concentration magnetic sludge; s4, magnetic powder in the high-concentration magnetic sludge is separated out, and the separated magnetic powder is guided into the sewage in the S1 again. The invention provides a sewage treatment system which comprises a coagulation reaction tank, a solid-liquid separation device, a drainage pipeline, a magnetic powder tank, a rotational flow sand settling device, a magnetic recovery device and a sludge tank. According to the invention, magnetic sludge accumulation in the solid-liquid separation device can be prevented, and the influence of local sewage blockage on water outlet in the solid-liquid separation device is avoided; and the coagulation effect in the coagulation stage can be enhanced, the dosage of the system is reduced, and the overall elevation difference of the system is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment method and treatment system. Background technique [0002] In recent years, with the rapid development of water treatment technology, magnetic separation technology has been widely studied and applied in the water treatment industry. Magnetic separation technology is based on traditional coagulation and precipitation by adding magnetic media such as magnetic powder, and combining with non-magnetic or weakly magnetic substances in water after coagulation to make it magnetic. After the coagulation reaction is completed, the mud-water mixture is adsorbed by an external magnetic field for solid-liquid separation, which improves the efficiency of pollutant treatment. The magnetic separation treatment method has the advantages of simple operation, good treatment effect, high efficiency, small footprint, low cost, shock load resistance and no secondary pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F1/48C02F1/52C02F1/38
CPCC02F9/00C02F1/488C02F1/52C02F1/38
Inventor 张宁迁赵云松孙震方国锋王余张令
Owner ANHUI PUSHI ECOLOGICAL ENVIRONMENT ENG
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