人工湿地对猪场废水有机物处理效果的研究_廖新俤

应用生态学报2002年1月第13卷第1期CHINESEJOURNALOFAPPLIEDECOLOGY,Jan.2002,13(1):113～117人工湿地对猪场废水有机物处理效果的研究＊廖新亻弟＊＊骆世明(华南农业大学热带亚热带生态研究所,广州510642)【摘要】分别以香根草(Vetiveriazizanioides)和风车草(Cyperusalternifolius)为植被,按1.0m×0.5m×0.8m建立人工湿地,通过4季测试,研究其对猪场废水有机物的净化功能及其随季节、进水浓度及水力停留时间变化的规律.结果表明,4个季节香根草或风车草人工湿地对COD和BOD有较稳定的去除效果,两湿地抗有机负荷冲击能力强.在春季,停留时间1～2d,COD和BOD去除率分别为70%和80%;在夏季,进水COD高达1000～1400mg·L-1情况下,COD去除率接近90%;在秋季,停留时间1～2d,COD和BOD去除率分别为50%～60%和50%;在冬季,进水COD达1003mg·L-1情况下,COD去除率在70%以上.COD、BOD和SS的去除率在两湿地间没有显著差异.人工湿地污染物(Y)随水力停留时间(t)延长的降解遵从指数方程规律Yt=Y0·e(-kt).在相同停留时间时,随进水污染物浓度(x)提高的出水污染物浓度(y)的回归关系遵从直线方程规律y=a+bx.关键词香根草风车草人工湿地猪场废水处理文章编号1001-9332(2002)01-0113-05中图分类号X703文献标识码ATreatmenteffectofconstructedwetlandsonorganicmatterinwastewaterfrompigfarm.LIAOXindiandLUOShiming(InstituteofTropicalandSubtropicalEcology,SouthChinaAgriculturalUniversity,Guangzhou510642).-Chin.J.Appl.Ecol.,2002,13(1):113～117.UsingplantspeciesVetiveriazizanioidesandCyperusalternifoliusrespectively,twoconstructedwetlands(CWS)withsizeof1.0m×0.5m×0.8mwereestablished.Thepurifyingfunctionanditschangepatternwithseason,influentconcentrationandhydraulicretentiontime(HRT)oftheconstructedwetlandsontheorganicmattersinwastewaterfromapigfarmwerestudiedthroughoutfourseasonsintheyear.TheresultsshowedthatthetwoCWShadverystableeffectsontheremovalofCODandBOD,whiletheorganicmattersinwastewaterchanged.TheremovalrateofCODandBODwas70%and80%respectivelybyHRT1～2dinspring.There-movalrateofCODreached90%withtheinfluentofCOD1000～1400mg·L-1insummer.TheremovalrateofCODandBODwas50～60%and50%respectivelybyHRT1～2dinautumn.TheremovalrateofCODreached70%withtheinfluentofCOD1003mg·L-1inwinter.TherewasnosignificantdifferencebetweentwoCWSintheremovalofCOD,BODandSS.TheruleofcontaminantsdecreasedwiththeHRTinCWSfollowedexponentialfunction:Yt=Y0·exp(-kt).Therelationbetweentheconcentrationofcontaminantsininfluent(x)andoutflow(y)atthesameHRTfollowedlinearrelation:y=a+bx.KeywordsVetiveriazizanioides,Cyperusalternifolius,Constructedwetlands,Pigfarm,Wastewatertreat-ment.＊国家“九