简介:介绍聚合硅酸盐复合絮凝剂的发展和研究现状,主要是聚硅酸与铁盐、铝盐和锌盐之间的相互复合。分别介绍聚铝铁,聚铁锌和聚铝锌絮凝剂的研究现状,对我国复合絮凝剂的发展提出一些建议,希望能对我国絮凝剂的研制和开发工作有所帮助。
简介:TheobjectiveofthisresearchwastoexamineifcertainstrainsofBacillusbacteria,couldsurviveindrypowderproductsandifso,couldthebacteriadegradeorganiccontaminantsinsalinewastewateronaship.Aspartofthestudy,weisolated7domesticatedstrainsnamedNY1,NY2,…,andNY7,thestrainNY6showedtohavethebestperformancefororganicmatterdegradationandcouldsurviveindrypowdermorethan3months.NY6wasidentifiedasBacillusaerius,basedonthemorphologicalandphysic-chemicalproperties.Itsoptimalgrowthconditionswereasfollows:salinitywas2%;temperaturewas37℃;pHwasin6.5-7.0;bestratioofC:N:Pwas100:5:1.ThecapabilityofitsdrypowderforChemicalOxygenDemand(COD)removalwas800mgCOD/ginsynthesizedmarinewastewaterwith2%salinity.Thesporesinthedrypowderwere1.972×108g-1.