,suchasnitrogenandphosphorus,aredischargedintolargelakes,estuaries,baysandotherwaterbodieswhichflowslowly,itwillcauseaphenomenonthatalgaeandotherplanktoninwatermultiplyrapidly,dissolvedoxygendecreases,(N、P)anisms(especiallyblue-greenalgaeandredalgae)anismProducehydrogensulfideandothergases3精品IdentificationindexNitrogencontent≧~(BOD)≧10ppmPhosphoruscontent≧~(pH=9~10)Thecontentofchlorophyll–aincharacterizedalgae≧10μmg/anicwaste,-,suchasiron,aluminumandcalciumForexample,
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