Research On The Application Of Aquatic Plants In The Construction Of Beautiful Countryside

Along with our country put forward "to build a new socialist countryside,the beautiful country" these concepts,the construction of the rural issues are on the agenda,the agricultural use of pesticides,fertilizers and other chemicals,these products contain plenty of eutrophication material such as N and P,through irrigation is created in the form of a large amount of farmland sewage,these pollutants will on surrounding soil,vegetation,rivers,lakes,and groundwater pollution and damage;The overall acceptance rate of domestic sewage in rural areas is low and the direct discharge rate is high.The specialized management of small sewage treatment stations is poor and the water quality cannot meet the discharge standards.China’s aquaculture sewage contains a large amount of floatation and ammonia nitrogen,with high concentration of organic matter and a strong taste.Sewage is discharged directly into the ground at the door of each household,the ditches at the edge of the village or the lakes in the village without treatment,seriously damaging the water quality and ecological environment in the countryside.In order to better play the role of aquatic plants in the construction of beautiful countryside,the main research content of this paper is divided into three aspects.Secondly,starting from the model of rural sewage treatment,this paper summarizes the sewage treatment methods for aquatic plants in farmland,surface runoff and livestock breeding,namely the theoretical basis.Thirdly,follow the summarized theoretical basis to verify the practicability of the theory in field projects,and design the sewage treatment scheme for the beautiful countryside constructed by aquatic plants in caoyuan town,changde city.The main research results of this paper are as follows:(1)theoretical research on aquatic plants in the construction of beautiful countryside1.Plant configuration of farmland:(1)ecological gully:large and medium-sized ecological gullies(2-25m wide)are mainly used.Large plants with strong adsorption capacity for N and P,such as cattail,water onion,water bamboo,and asparagus,are planted on the two sides of interception gully.Submerged plants:bitter grass,snapdragon algae,etc.(2)artificial wetland:to carrying capacity of strong,resistant to choose to purify ability,strong ability in art of indigenous plants,such as water sedge swamp cabbage,water,green algae,cattail,scirpus tabernaemontani foxtail,reeds,Jiao grass,Biao grass and flowers,barracuda grass,canna,calamus,yellow calamus,willow,iris,papyrus,bamboo parasol,water celery,lotus,duckweed,emperor bamboo grass,etc.2.Plant configuration of surface runoff:(1)plant configuration of ecological gully:mainly small gully(width not more than 2m),semi-arid plants with strong nitrogen and phosphorus adsorption capacity and small exhaling plants are planted on both sides of the interceptor gully,such as yellow calamus,canna,calamus,iris,zareliflora,barracuda,etc.;submerged plants:bitter grass,black algae,etc.(2)plant configuration of the four-grid purification tank:the wetland is mainly planted with canna,parasol,iris,yellow calamus and other aquatic plants,with high survival rate,strong water resistance and long growth cycle.(3)plant configuration of the plant pond:suitable medium-sized flowering aquatic plants should be selected,such as submerged plants:bitter grass,black algae,pterophora,etc.;Water plants:zalihua,celandine,water bamboo,lotus,etc.Floating plants:water lilies,etc.3.Plant configuration for livestock farming:This paper mainly constructed the green fox coccyx wetland for purification,and planted a large mumber of green fox coccyx in the wetland.(2)the design scheme for the construction of beautiful countryside in caoyuan town,dingcheng district,changde cityThis paper mainly introduces three main sewage purification measures,namely,the treatment measures for the treatment of farmland sewage,the treatment measures for the treatment of surface runoff sewage and the treatment measures for the treatment of livestock breeding sewage:Farmland sewage purification treatment measures:taking water pollution of farmland planting and raising mode,collection of livestock and poultry breeding waste into organic fertilizer,planting green manure,straw returned by a number of measures and strategies,reduce the fertilizer input,unclog the surrounding farmland drainage ditches,setting a dam,the dam,and the ecological floating island,planting has strong ecological interception function and has certain using value of green foxtail algae such as wet plant,building ecological ditches,strengthens the intercepting drainage given nitrogen and phosphorus pollutants.2.Purification and treatment measures of surface runoff sewage:a four-pond purification system is constructed for scattered domestic wastewater in the project area.A combined ecological treatment system(ecological absorption pond)is adopted.Constructed large-scale artificial ecological treatment wetland,landscape wetland and ecological floating bed at the end of drainage basin and catchment area to further intercept and absorb nitrogen and phosphorus pollutants from upstream runoff pollution and ecological ditches that fail to completely intercept and absorb nitrogen and phosphorus pollutants in water.3.Livestock breeding sewage purification treatment measures:first of all,the development of livestock and poultry breeding program.Second using aquaculture waste resource utilization mode of governance,namely:waste first after biogas/YanYangChi pretreatment,methane for the use of the surrounding residents and units,to make full use of biogas slurry and renewal as the organic fertilizer,due to seasonal reasons cannot use of biogas slurry is mainly by building green foxtail algal ecological wetland system given after discharging standard.This study also includes plant configuration pattern,plant configuration drawing and plant configuration quantity of the project site,as well as relevant design drawings.