活性汚泥法における全窒素の問題
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活性汚泥法による工業団地の廃水処理は、主に羊毛洗浄廃水、製鉄所廃水、および生活排水です。第三沈殿池の出水の全窒素が第二沈殿池より常に高いのは、なぜでしょうか。第二沈殿池の処理水の全窒素は10～13mg/Lで、第三沈殿池の処理水では時々15mg/Lになることがあります。
おそらくすべてはスラッジが原因で、出水のSSが高いときに微生物がもたらす総窒素です。
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