冷水性鱼类工厂化养殖中臭氧催化氧化降解氨氮

Removalofammonia-NfromrecirculatingaquaculturesystemofcoldwaterfishbyozonationinthepresenceofbromideLIUYong,CAOGuang-bin,JIANGShu-yi,HANShi-cheng,CHENZhong-xiang(HeilongjiangRiverFisheriesResearchInstitute,ChineseAcademyofFisherySciences,Harbin150070,China)Abstract:Withozonegeneratorandreactiontower,theculturewaterwith5mg/LNaBrwasfullymixedandtheo-zonereactedwithammoniatodecomposeammoniaintoN2.Someexperimentswerecarriedoutinarecirculatingrainbowtroutculturesystemwith9.2m3waterand10kg·m-3fishdensity.Duringwaterexchangeperiodof192hours,thewatersamplesweretestedevery24hourstoanalyzepHandconcentrationsofDO,ammonia,nitrite,ni-trate,suspendedsolidsandsoon.Bytheexperiments,theammoniadecompositioncapacityandapplicationofo-zonationcouldbedetermined.Theresultsshowedthatozonationcouldeffectivelydecomposetheammoniaofaqua-culturewaterinthepresenceofbromide,andtheefficiencyofdecompositionreached50.11%whichwasapproxi-matelyhigherby24.31%thandirectoxygenatedefficiencybyozonation.Intheexperiments,nitriteandnitratewereaccumulated,andconcentrationofnitritedecreasedto0.089mg/Lon192ndhourbecausenitritewastrans-formedintonitrateasthemainnitrogenby-productbyozonation.ThepHshouldbeadjustedowingtoitsgraduallydescendingto5.55on192ndhour.Inthisexperiment,theconditionsofDOandsuspendedsolidsweresuitableforcoldwaterfish.Decompositionofammoniabyozonationinthepresenceofbromidewasbeneficialforcoldwaterfishrecirculatingculturesystem.Keywords:ammonia;ozonation;decomposition;bromideCorrespondingauthor:CAOGuang-bin.E-mail:hscgb@163.net《水产科学》杂志2006年征订启事《水产科学》杂志是由辽宁省水产学会主办的水产科技期刊,1982年创刊,国内外发行。是中文水产、渔业类核心期刊和全国农业系统优秀期刊之一,现已被俄罗斯《文摘杂志》、英国《动物学记录》、《国际农业与生物科学研究中心》、美国《剑桥科学文摘》等收录。国内方面,已被中国科学引文数据库、中国学术期刊综合评价数据库、《中国学术期刊(光盘版)》、中国期刊网和万方数字化期刊群中文科技期刊数据库收录。杂志主要刊载渔业资源、海淡水捕捞、水产养殖与增殖、水产生物病害及防治、水产饲料与营养、水产品保鲜与加工综合利用、渔船、渔业机械与仪器及水产基础科学等方面研究的新进展、新技术、新方法等。设有研究与应用、综述与专论、科普讲座、渔业信息等栏目。读者对象为水产科技工作者,大中专院校水产、生物、环保等专业师生,渔业行政、事业和企业单位有关管理和技术人员及广大知识渔民。欢迎渔业企业刊登广告。本刊为月刊,A4开本,56页,每月25日出版,定价5.00元,全年60.00元。邮发代号8-164,订阅者请到邮局订阅,也可直接汇款或银行信汇至本刊编辑