Biochemical oxygen demand

  • biochemical oxygen demand
  • The amount of oxygen used for biochemical oxidation by a unit volume of water at a given temperature and for a given time. BOD is an index of the degree of organic pollution in water.
Abstract from DBPedia
    Biochemical oxygen demand (BOD) is the amount of dissolved oxygen (DO) needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at a certain temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per litre of sample during 5 days of incubation at 20 °C and is often used as a surrogate of the degree of organic pollution of water. BOD reduction is used as a gauge of the effectiveness of wastewater treatment plants. BOD of wastewater effluents is used to indicate the short-term impact on the oxygen levels of the receiving water. BOD analysis is similar in function to chemical oxygen demand (COD) analysis, in that both measure the amount of organic compounds in water. However, COD analysis is less specific, since it measures everything that can be chemically oxidized, rather than just levels of biologically oxidized organic matter.

    生物化学的酸素要求量(せいぶつかがくてきさんそようきゅうりょう、英: biochemical oxygen demand)は、生物化学的酸素消費量とも呼ばれる最も一般的な水質指標のひとつであり、主に略称のBODが使われている。 水中の有機物などの量を、その酸化分解のために微生物が必要とする酸素の量で表したもので、特定の物質を示すものではない。単位は O(オー) mg/L または mg-O2/L だが、通常 mg/L と略される。一般に、BODの値が大きいほど、その水質は悪いと言える。