Comparison of Nutrient Uptake from Rural Domestic Sewage of Aquatic Plants

doi:10.7668/hbnxb.2008.02.048

Abstract

Abstract: The ability of 7 high aquatic plants was compared in constructed wetland simulated for rural domestic sewage treatment.The treatment system with hydrophytes had a higher removal efficiency to COD,total nitrogen(TN) and total phosphorus(TP) than that without hydrophytes.The removal contribution rate of plant accumulation to nitrogen and phosporus was 7%-63%,12%-65%,respectively.Nitrogen and phosphorus accumulation in stems and leaves were higher than that in roots of most tested hydrophytes.The comprehensive evaluation result indicated that,according to plant purification ability to the contamination,the order was Arundo donaxTriarrhena saccharifloraAcorus calamusPhragmites communisIris pseudacorusLythrum salicariaSagittaria trifolia.The cluster result showed that these 7 hydrophytes were sorted into three groups,the first group including A.donax,which possessed the strongest accumulated ability to the contamination;The second group including A.calamus,Triarrhena sacchariflora,P.communis,which possessed stronger accumulated ability;The third group including I.pseudacorus,L.salicaria and S.trifolia,whose uptake ability to water pollution was lowest of the three groups.

Key words: Hydrophyte, Removal of nitrogen and phosphorus, Dequrative ability

CLC Number:

WANG Qing-hai, DUAN Liu-sheng, LI Rui-hua, WU Ju-ying. Comparison of Nutrient Uptake from Rural Domestic Sewage of Aquatic Plants[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(2): 217-222. doi: 10.7668/hbnxb.2008.02.048.

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