Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof

A technology for initial rainwater and treatment devices, applied in water supply devices, waterway systems, sewage removal, etc., can solve problems such as blockage, improve permeability, expand the geographical scope of use, and do not occupy the ground area.

Inactive Publication Date: 2010-11-24
宁波市洁源环保科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial waste flow rainwater enters the grit chamber for sedimentation after passing through the waste flow device, and then enters the water inlet mechanism for water distribution, and then flows into the sewage purification soil ditch for land treatment. Through a special structure, the problem of sewage blockage in soil method treatment can be solved, and the initial rainwater disposal can be achieved. Reach the first-level discharge standard (GB18918-2002) in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants", and can effectively prevent the system from clogging

Method used

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  • Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof
  • Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof
  • Onsite processing device for discarding initial rainwater in heavy rain without occupying area and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The permeability coefficient in a community in Chongming County, Shanghai is taken as 6.2×10 -4 cm / s of soil, build a filling surface area of ​​10m per cubic meter of soil 2 The rainwater purification soil trench of biological filler, the depth of the trench is 700mm when the soil layer is not included, the depth of the trench after the soil is 800mm, and the area is 2.0m 2 , the design treatment water volume is 0.3-0.9m 3 / d, that is, the hydraulic load is 15-45cm / d. At the same time, a decontaminated soil trench of the same size without biofill was built as a comparison. Artificial water distribution, dosing into the test device for testing.

[0043] Influent COD Cr 50.4-180.6mg / L, SS 18-52mg / L, total phosphorus 1.9-2.7mg / L, ammonia nitrogen 13.4-38.7mg / L, pH 5.8-6.5, with a hydraulic load of 40cm / d After entering the test device and passing through the device, the COD of the effluent Cr SS is 11.1-27.8mg / L, SS is 5.5-7.1mg / L, total phosphorus is 0.05-0.06mg / L, ...

Embodiment 2

[0045] Taking the permeability coefficient of a university campus as 2.9×10 -7 cm / s of soil, build a filling surface area of ​​20m per cubic meter of soil 2 Initial rainwater waste stream purification process of biological filler. The depth of the trench is 700mm when the soil layer is not included, and the depth of the trench after the soil is 800mm, and the area is 2m 2 , the design treatment water volume is 0.4-0.8m 3 / d, that is, the hydraulic load is 20-40cm / d. At the same time, a domestic sewage purification soil ditch of the same size without biological filler was built as a comparison. Simulate the initial rainwater on the road surface, and put it into the test device for testing.

[0046] Water inflow simulated road surface runoff: COD is 186-312mg / L, SS is 25-106mg / L, total phosphorus is 0.4-1.3mg / L, ammonia nitrogen is 1.6-4.9mg / L, and total nitrogen is 2.3-7.4mg / L , with a pH of 5.3-6.5, was dosed into two soil trenches with a hydraulic load of 40cm / d, and aft...

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Abstract

The invention provides an onsite processing process for discarding initial rainwater in a heavy rain without occupying area, belonging to the technical field of environmental engineering. The invention discloses an onsite processing device for the discarding initial rainwater in the heavy rain without occupying area, which comprises a water inlet mechanism, a soil covering layer, a mixed layer, a soil layer, a gravel layer, a fine sand layer, a foundation layer and a draining mechanism, wherein the soil covering layer, the mixed layer, the soil layer, the gravel layer, the fine sand layer and the foundation layer are arranged in sequence from top to bottom; and the water inlet mechanism is connected with the mixed layer; and the draining mechanism is connected with the gravel layer and the fine sand layer. By the invention, the discarded initial rainwater in the heavy rain can reach the grade I discharge standard of the Discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002) and GB/T 18920-2002 reuse of recycling water for urban and water quality standard for urban miscellaneous water consumption, and the blockage problem of the groove processing system can be effectively prevented.

Description

technical field [0001] The invention relates to a device and a method in the field of waste water treatment technology, in particular to an on-site treatment of rainwater discarded flow at the initial stage of a heavy rain process without occupying a place and a treatment method thereof. Background technique [0002] At present, many cities in my country have caused rainwater to enter the sewage treatment pipes due to the confluence system. One of the main problems brought about by this is that the amount of sediment in the sewage is very high, which seriously affects the final treatment of sewage plant sludge. Mechanical equipment such as pipes and sludge have severe wear and tear effects. At the same time, with the promotion of energy saving and emission reduction in our country, it is required to recycle rainwater as much as possible. However, because the initial rainwater carries a large amount of sediment and pollutants, if it is mixed with later rainwater for treatment,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03F1/00
CPCY02A20/108
Inventor 楼紫阳朱南文聂俊英沈后起袁海平
Owner 宁波市洁源环保科技发展有限公司
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