System for disposing artificial wetland sewage and disposal method thereof

Abstract

The invention relates to a system for disposing artificial wetland sewage. The system comprises a pre-treatment system, a biochemical treatment system, and a sludge storage tank according to a disposal sequence and is characterized by further comprising a tail water advanced treatment system after the biochemical treatment system, wherein the pre-treatment system comprises an automatic grating well; the biochemical treatment system comprises an anaerobic tank, an aerobic tank and a secondary sedimentation tank; the tail water advanced treatment system comprises an artificial wetland; and the artificial wetland comprises four waterproof walls, a packed bed body, and an aquatic plant layer arranged above the packed bed body. The method for disposing the artificial wetland sewage by utilizing the system comprises the following main steps that: impurities in the sewage are separated by automatic gratings; organic matters are acidulated and degraded by anaerobic water; after the sewage is settled and separated, supernate is discharged outside; activated sludge in the secondary sedimentation tank is refluxed to the anaerobic tank and the aerobic tank; water discharged from the secondary sedimentation tank enters the artificial wetland; plants on the surface of the packed bed body are used for purifying the sewage; and the remaining sludge enters the sludge storage tank and is pumped and disposed by an environmental health department.

Description

Technical field

[0001] The invention relates to a sewage treatment system, in particular to a constructed wetland sewage treatment system and a treatment method thereof. Background technique

[0002] Residential, commercial, agricultural and industrial water use produces a large amount of untreated wastewater, which can cause health hazards and environmental problems. Therefore, most cities use wastewater treatment equipment downstream of their sewage collection systems to treat unpurified wastewater into a relatively harmless form.

[0003] The wastewater entering the treatment equipment (inflow) is about 99% water and 1% of large objects, solids, dissolved solids, oils, waxes, and a mixture of organic matter. The latter can be separated from the former by using a series of processing steps, which are usually called pre-processing, primary processing, secondary processing, and advanced processing. Pretreatment and primary treatment remove solids. The secondary treatment uses mi...

Examples

specific Embodiment

[0034] 1. Design principles: Taking sewage treatment capacity of 1000m3 / d as an example, design domestic sewage water quality: pH=6-9; CODcr≤300mg / L; BOD5≤150mg / L; SS≤200mg / L; NH3-N≤20mg / L.

[0035] Treatment requirements: After the sewage is treated by the treatment facility, the discharged sewage meets the first-level standard of "Integrated Wastewater Discharge Standard" GB8978-1996, and its control indicators are: pH=6-9; CODcr≤100mg / L; BOD5≤20mg / L ; SS≤70mg / L; NH3-N≤15mg / L.

[0036] Sewage treatment process: According to the characteristics of domestic sewage, combined with the previous engineering experience of domestic sewage treatment and ensure the sewage treatment effect, the process of "anaerobic-aerobic-ladder type wetland" is adopted for treatment. The process flow of "anaerobic-aerobic-ladder wetland" is shown in the figure.

[0037] 2. Process description:

[0038] 1. The domestic sewage flows into the automatic grid well after being collected through the pipe networ...

Technical field

[0001] The invention relates to a sewage treatment system, in particular to a constructed wetland sewage treatment system and a treatment method thereof. Background technique

[0002] Residential, commercial, agricultural and industrial water use produces a large amount of untreated wastewater, which can cause health hazards and environmental problems. Therefore, most cities use wastewater treatment equipment downstream of their sewage collection systems to treat unpurified wastewater into a relatively harmless form.

[0003] The wastewater entering the treatment equipment (inflow) is about 99% water and 1% of large objects, solids, dissolved solids, oils, waxes, and a mixture of organic matter. The latter can be separated from the former by using a series of processing steps, which are usually called pre-processing, primary processing, secondary processing, and advanced processing. Pretreatment and primary treatment remove solids. The secondary treatment uses mi...

Examples

specific Embodiment

[0034] 1. Design principles: Taking sewage treatment capacity of 1000m3 / d as an example, design domestic sewage water quality: pH=6-9; CODcr≤300mg / L; BOD5≤150mg / L; SS≤200mg / L; NH3-N≤20mg / L.

[0035] Treatment requirements: After the sewage is treated by the treatment facility, the discharged sewage meets the first-level standard of "Integrated Wastewater Discharge Standard" GB8978-1996, and its control indicators are: pH=6-9; CODcr≤100mg / L; BOD5≤20mg / L ; SS≤70mg / L; NH3-N≤15mg / L.

[0036] Sewage treatment process: According to the characteristics of domestic sewage, combined with the previous engineering experience of domestic sewage treatment and ensure the sewage treatment effect, the process of "anaerobic-aerobic-ladder type wetland" is adopted for treatment. The process flow of "anaerobic-aerobic-ladder wetland" is shown in the figure.

[0037] 2. Process description:

[0038] 1. The domestic sewage flows into the automatic grid well after being collected through the pipe networ...

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