单词	biochemical oxygen demand
释义	biochemical oxygen demand /ˌbīōˌkeməkəl ˈäksəjən diˌmand / (abbreviation BOD) noun The amount of dissolved oxygen that must be present in water in order for microorganisms to decompose the organic matter in the water, used as a measure of the degree of pollution. Also called biological oxygen demand.Another body, the U.S. Council on Environmental Quality established five measures for judging water quality: biochemical oxygen demand, nitrogen, phosphorus, dissolved oxygen, and fecal coliform bacteria.... Maintaining the biochemical oxygen demand, nitrogen and organic matter content of wastewater outside the limits that are favourable for mosquito breeding is very helpful. Gives easy to understand and clear instructions for testing dissolved oxygen, fecal coliforms, pH, biochemical oxygen demand, temperature, total phosphate, nitrates, turbidity, and total solids.
随便看	nomothetês nomothetēs -nomy non- nona- non-abelian non-ability non-Aboriginal nonabrasive non-absolute nonabusive non-acceptance non-acceptant non-access non-achiever non-acid non-acidic non-act nonactin non-acting non-actinic non-action non-active non-adaptive non-adaptively

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