Ecological Wastewater Treatment Technology Research In The Highway Service Area

In recent years, the rapid development of highway construction on water resources caused some degree of damage. This in-depth analysis of highway status of wastewater treatment service area to explore a highway service area for wastewater treatment and reuse technology, combined with demonstration project construction and operation of the highway service area of ecological wastewater treatment technology and the adjustment of parameters optimization, ecological wastewater treatment processes are summarized in the successful experience for the highway service area of ecological wastewater treatment technology to provide theoretical and practical application experience.Survey results show that:subsurface flow constructed wetlands and soil filter for the highway service area has a good applicability of sewage treatment, the treated effluent to meet emission standards to be stable, and the province with the construction and operation cost, good effect, operation and maintenance is simple, Landscape works well, strong stability and other advantages, and the sewage treatment system can perfect blend of the surrounding landscape and to protect the local ecological environment, showed good applicability and broad application prospects, particularly for more highways in the green service area application.Subsurface flow constructed wetland wastewater treatment research demonstration projects that:hydraulic loading rate is 0.25 m3/m2d in the case, the use of subsurface flow constructed wetland for the treatment of domestic sewage, treated effluent can be achieved "urban wastewater reuse for urban miscellaneous water quality" (GB/T 18920-2002) Urban Greening water quality requirements. Soil leachate treatment research demonstration projects that:hydraulic loading rate is 0.8 m3/m2d in the case of demonstration projects to stabilize the effluent up to the national "Integrated Wastewater Discharge Standard" (GB 8978-1996) of a standard, by Add Tao sand, slag and humus, to effectively improve the poor permeability of soil aeration and organic matter content, greatly improving the purification efficiency; the same time, up and running, take a step to increase the hydraulic load and intermittent dosing such as strengthening start running program that will System start-up time reduced to 30 days; in the underlying soil infiltration system filled with soil (thickness 40cm) of sand mixed with 20% of the pottery over the water to increase the capacity of the soil, fill in the surface soil (thickness 30cm) in the mixing 25% of the slag (slag off 1cm sieve) to increase soil aeration and permeability properties. In order to improve the soil's humus content, improve soil aggregate structure, in order to create a favorable soil environment for the growth, infiltration trench in the soil mixed with a certain amount of peat, organic matter content of the soil to about 5%.