Initial rainwater treatment process based on super-magnetic coagulating sedimentation technology

A technology of initial rainwater and treatment process, applied in flocculation/sedimentation water/sewage treatment, runoff/rainwater treatment, multi-stage water treatment, etc., can solve problems such as enrichment and plant growth threats

Pending Publication Date: 2020-12-15
扬州碧蓝水环境治理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the accumulation of heavy metals on the surface of the long-term bioretention system may pose a threat to the growth of plants, and the surface filler needs to be replaced regularly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The initial rainwater treatment process adopts the super magnetic coagulation sedimentation technology. The sewage passes through the grid to remove the particulate matter in the river and reduce the load of the magnetic loading system; then the wastewater is lifted to the magnetic loading system through the lift pump, and the flocculant is first added to the wastewater. The suspended solids are destabilized into small flocs, and then modified magnetic seeds are added to increase the density of the flocs. At the same time, coagulants are added to increase the volume of the flocs and improve their sedimentation performance. When the sedimentation performance is improved , and finally the wastewater passes through the magnetic loading system, and the effluent reaches the standard and returns to the river; the sedimentation sludge is separated from the modified magnetic seeds through the cyclone recovery system, and the modified magnetic seeds are recycled, and the sludge en...

Embodiment 2

[0027] Adopt embodiment to use domestic sewage, adopt the primary rainwater treatment process of supermagnetic coagulation sedimentation technology to carry out domestic sewage treatment, specifically:

[0028] The coagulant used is 45 parts of acid-soluble fly ash, 25 parts of high-iron bauxite, 28 parts of diatomite, 15 parts of aluminum sulfate, and 18 parts of ferric chloride. Grind the raw materials into fine particles, and roast at 800°C for 5 hours; mix the mixed material calcined at high temperature with 2mol / L industrial hydrochloric acid (the ratio of the mixed material to industrial hydrochloric acid is 1g:7mL), and condense and reflux after mixing 1.5h, after cooling, add it to the sewage treatment process according to the dosage of 0.5mg / L.

[0029] The modified magnetic species used is obtained by organically modifying the surface of common magnetic species with polyvinyl alcohol. First, the common magnetic species Fe 3 o 4 Add it to 70% acetone aqueous solutio...

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PUM

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Abstract

The invention discloses an initial rainwater treatment process based on a super-magnetic coagulating sedimentation technology, and belongs to the technical field of urban initial rainwater treatment.The system sequentially comprises a super-magnetic coagulation system and a sludge treatment system; sewage enters a magnetic loading system after passing through a grid, a flocculating agent is addedfirstly, then modified magnetic seeds and a coagulant aid are added, and finally, effluent reaches the standard and flows back to a river channel after the sewage passes through the magnetic loadingsystem; the precipitated sludge is separated from the modified magnetic seeds through a rotational flow recovery system, the modified magnetic seeds are recycled, the sludge enters the sludge treatment system to be compressed and conditioned, then the sludge is dewatered through a dewaterer, the sludge is transported outwards, and filtrate flows back to a water inlet pipeline to be circularly treated. According to the process, a super-magnetic coagulating sedimentation technology is adopted, the use amounts of the modified magnetic seeds, a coagulant and the flocculating agent are reasonably selected, urban initial rainwater is effectively treated, and indexes such as SS, COD and TP reach the first-grade A standard of GB 18918-2002.

Description

technical field [0001] The invention belongs to the technical field of urban initial rainwater treatment, and in particular relates to an initial rainwater treatment process based on supermagnetic coagulation sedimentation technology. Background technique [0002] With the continuous development of my country's national economy and the rapid advancement of urbanization, the continuous expansion of urban scale has caused great changes in the properties of the underlying surface of the city, which in turn has affected the original hydrological cycle of the city and changed the balance of supply and demand of urban water resources. On the one hand, the problem of rain and flood disasters is common in big cities. On the other hand, rainwater runoff washes a large amount of non-point source pollution into natural water bodies such as urban inland rivers, causing serious environmental pollution problems. In recent years, as my country has paid more and more attention to non-point s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F11/00C02F11/121
CPCC02F9/00C02F11/00C02F11/121C02F1/001C02F1/488C02F1/5263C02F1/5236C02F1/56C02F2103/001C02F2301/08
Inventor 魏亮亮刘雪岭段乔陈辉
Owner 扬州碧蓝水环境治理有限公司
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