Artificial ecological wastewater treatment unit in expressway service areas

Abstract

The invention relates to an artificial ecological wastewater treatment unit in expressway service areas. A layered unit is made from ecological concrete material and is divided into a plant layer, anartificial filler layer and an artificial composite filtering material bedding layer from top to bottom; the thickness of the artificial composite filtering material bedding layer at the bottom part is 4-8 cm, and the artificial composite filtering material bedding layer is formed by mixing crushed stone with the diameter of 1-4 cm, building rubbish, slag and clay particles, and the volume mixingratio is 6:2:1:1; the artificial filler layer is formed by mixing original soil and sawdust, the volume mixing ratio is 6:4, and the thickness is 4-6 cm; and the plant layer comprises black rush, bahia grass (12 clusters / square meter), perennial ryegrass and bulrush (18 clusters / square meter). The artificial ecological wastewater treatment unit can effectively clear the inorganic eutrophic elements, such as nitrogen and phosphorus, in the sewage water, removes various organic pollutant substances such as SS, COD, BOD5, and the like, and conforms to the characteristics of low water quantity andunstable water quality of expressways; in addition, the artificial ecological wastewater treatment unit has wide application range, is not limited by sites, also can be used for treatment of pools, domestic wastewater and industrial wastewater, and is less in construction investment and convenient to operate.

Description

technical field [0001] The invention relates to an artificial ecological wastewater treatment unit, in particular to an artificial ecological wastewater treatment unit in a highway service area (highway service station, toll station, monitoring center, etc.), and belongs to the field of environmental protection engineering. Background technique [0002] At present, in addition to greening projects, the road construction rarely treats and reuses the domestic sewage in the subsidiary areas along the line, and most of them are directly discharged, causing ecological damage along the line. In recent years, with the increasing awareness of road environmental protection by governments at all levels, a small number of areas have begun to treat sewage in the service areas along the road, but the effect is not satisfactory. The sewage in the existing road service area has the characteristics of small water volume, large fluctuations in water quality and water volume, and high concent...

AI Technical Summary

Problems solved by technology

However, the ammonia nitrogen and phosphate treated by the biological contact oxidation method cannot stably reach the standard; and although the A / O method has the function of denitrification and phosphorus removal, the performance of resisting changes in water quantity and quality is poor

In addition, the single biological contact oxidation method and A / O method both require units such as secondary sedimentation tanks, which occupy a large area, have large fluctuations in the concentration of floating substances in the effluent, require large investment, high operating and management costs, and are inconvenient to operate

At the same time, due to the characteristics of low water volume, unstable water quality, low treatment efficiency, large floor area, strong seasonal influence, and unmanned management, it is difficult to find suitable treatment equipment.

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