The Use Of Constructed Wetland Plants Fermented To Produce Ethanol

Using constructed wetland to treatment sewage has a lot of advantage, but when wetlandplants mature it will produce a lot of biomass, these biomass largely accumulationsurrounding environment can be pollution. It will produce air pollution if directly burning. Atthe same time, with the declining of oil resources, to solve the problem about the exhaustedpetroleum resources, try to use grain to produce fuel ethanol is more and more importance. Inthis article wetland plants were studied, using appropriate wetland plants to produce fuelethanol, in one hand it will reducing emissions harmful gas, in another hand it can reduce thesecondary pollution by handing plants improper.The plants diversity in Deng Northbridge wetlands and Yongan River were investigated.The feasibility of using wetland plants to produce fuel ethanol was discussed. Water in earlythe wetland plants content was determined. According to the investigate result about wetlandplants diversity. Focus on analyzing of the composition of wetland plants, Phragmitesaustralis, Bambusa mnltiplex, Juncus effuses, Crofton Weed and Thalia dealbata were used toenzymatic hydrolysis. Juncus effuses, Phragmites australis and Thalia dealbata were used tosimultaneous saccharification and fermentation by NaOH pretreatment. The results show thattwo sheet flow wetland has the largest richness index D1, D2and diversity index D, H in DengNorthbridge wetlands. The two kinds of evenness index in subsurface flow wetland are largest.The richness index D1and D2in Yongan River is larger than Deng Northbridge wetlands. Thediversity index D, H and evenness index JSW, ESnearly equal in two different habitats. theCanna indica has highest water in early which is92.42%, the Zizania latifolia (Griseb.)Stapfhas lowest water in early which are47.02%. The glucose concentration and yield of Juncuseffuses, Phragmites australis and Thalia dealbata respectively are33.4g/L and41.75%、36.44g/L and45.55%、35.13g/L and43.91%. The ethanol concentration and yieldrespectively are33.14g/L and109.59%、34.89g/L and104.84%、32.46g/L and93.39%aftersimultaneous saccharification and fermentation.