Process overview: The integrated equipment of magnetic coagulation and sedimentation is based on the traditional flocculation and sedimentation, and adds magnetic seeds to the process to make it efficiently co-settle with the floc. Relying on the principle of gravity and inclined plate sedimentation, the rapid flocculation of pollutants can be realized, the surface load of the sedimentation tank can be improved, the hydraulic retention time can be shortened, and the treatment efficiency and effluent quality can be greatly improved. At the same time, the magnetic coagulation and sedimentation integrated equipment adds an optimal diatom adsorption area at the front end of the system, which enhances its function of treating pollution indicators such as total phosphorus, COD, and color. This equipment breaks through the limitations of the application of traditional flocculation and sedimentation technology in large-scale municipal sewage treatment plants, overcomes the problems of large area and low sedimentation efficiency of traditional flocculation and sedimentation, and significantly improves the effluent quality.

The "black" and "smelly" of urban black and odorous water bodies are caused by the fact that the water bodies and sediments are in the restored natural environment, so there are restored metal ions such as Fe2 and Mn2, which are fused with the scattered S2- in the water to produce black precipitates such as FeS and MnS floating in the water, making the water body show an unpleasant gray-black color. Due to the depletion of dissolved oxygen, the lack of oxygen or the metabolism of anaerobic fermentation and the decay of organic compounds in the water body will cause H2S, acetyl chloride, NH3 and other sour vapors. At present, large and medium-sized cities all have different levels of black and odorous rivers, and the cities in the south exceed those in the north, which not only endangers the urban landscape, but also harms the physical and mental health of nearby residents. For black and odorous water bodies, our country has vigorously rectified and implemented the "Ten Water Articles", which stipulate the elimination of black and odorous water bodies.

According to the project and the inlet and outlet water quality requirements, the project has strict effluent standards and large treatment capacity. The treatment needs to adopt a four-stage treatment process, and the main process adopts "coagulation, magnetic coagulation, flocculation and efficient precipitation".

The traditional process technology route can only further attach the traditional "tertiary treatment" equipment system, which can neither avoid the huge and complex traditional secondary biochemical treatment system, nor avoid the traditional tertiary filtration and adsorption treatment system with very expensive investment and operating costs. These are precisely the taboos of wastewater reuse. Therefore, the environmental protection market is in urgent need of new sewage treatment technologies and new equipment with higher purification efficiency, the treated effluent can meet the existing environmental protection standards and can be reused in the city, and the investment and operating costs should be acceptable to the economic strength of the existing city. Compared with other wastewater treatment processes, magnetic flocculation technology has the following advantages

(1) It is widely applicable and can be applied to the first, secondary, third, reclaimed water and various industrial sewage and drinking water of urban sewage.

(2) The treatment effect is good, the effluent quality is comparable to the effluent of the ultrafiltration membrane, and the magnetic flocculation process can effectively remove particulate pollutants, microbial contaminants and some pollutants dissolved in the water from the water, such as: COD, BOD, suspended solids, total phosphorus, color, turbidity, etc., especially for phosphorus. It can also be combined with bioprocesses for very efficient and economical denitrification.

(3) Strong impact load resistance, and unique impact resistance to the impact of water quality. When the previous process fails, or other harmful metal ions enter the sewage treatment system, the sewage can directly enter the magnetic coagulation system, and the system can still maintain a high removal effect and greatly remove pollutants in the water.

(4) The equipment and process can be adjusted at any time, with strong flexibility and small footprint, and can be set up as a mobile processing workshop (such as: mobile equipment processing vehicle, prefabricated house, etc.), and can be installed at a designated location according to demand, or a fixed plant can be built.

(5) The investment is low, which has obvious advantages over membrane treatment, and the magnetic particle can be recycled and recycled in the system, with a recovery rate of 99%.

(6) The operating cost is low, the service life of the equipment is long, and in addition to normal maintenance, there is no need to replace parts and cause high secondary investment. On the basis of the original equipment, the process can be added or transformed into a magnetic flocculation system, and only its core part needs to be changed, which can improve its processing capacity and reduce operating costs.

(7) Convenient operation management, fast start-up, and simple operation management.

Magnetic coagulation water purification equipment is suitable for the treatment of industrial wastewater, such as printing and dyeing, pharmaceutical, chemical, shoe and other industries, because this kind of wastewater usually contains a large amount of organic substances, and magnetic coagulation sewage treatment equipment can better remove these organic substances. It is also suitable for treating some special sewage, such as hospital sewage, catering sewage, etc., which can be treated well by this equipment.

Scope of magnetic coagulation equipment:

1. Domestic sewage treatment: first-class A upgrading and transformation, phosphorus removal of supernatant of sludge thickening tank:

2. Industrial sewage treatment: high phosphorus, high SS primary treatment and advanced treatment of biochemical effluent, mine water treatment

3. Black and odorous river: rapid reduction of SS, TP, COD and other indicators

4. Domestic drinking water supply treatment: primary treatment, sludge concentration supernatant/filter backwash water recovery

Product performance

1. High treatment efficiency, good effluent quality and stable operation:

2. Efficient phosphorus removal and suspended solids

3. The removal efficiency of non-soluble COD is high, which is more than 20% higher than that of conventional coagulation and precipitation

4. The sedimentation speed is fast, up to 40m/h, and the residence time is short

5. Reduce the amount of reagent used by more than 1/3

6. The magnetic seed can be recycled, and the recovery rate is greater than 99%

7. Small footprint

8. High degree of automation, simple operation and maintenance

9. Can be monitored remotely

10. Low operating cost