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  2. Biochemical oxygen demand - Wikipedia

    en.wikipedia.org/wiki/Biochemical_oxygen_demand

    BOD test bottles at the laboratory of a wastewater treatment plant. Biochemical oxygen demand (also known as BOD or biological oxygen demand) is an analytical parameter representing the amount of dissolved oxygen (DO) consumed by aerobic bacteria growing on the organic material present in a water sample at a specific temperature over a specific time period.

  3. Streeter–Phelps equation - Wikipedia

    en.wikipedia.org/wiki/Streeter–Phelps_equation

    The Streeter–Phelps equation is used in the study of water pollution as a water quality modelling ... is the initial oxygen demand of organic matter in the water, ...

  4. Theoretical oxygen demand - Wikipedia

    en.wikipedia.org/wiki/Theoretical_oxygen_demand

    Theoretical oxygen demand (ThOD) is the calculated amount of oxygen required to oxidize a compound to its final oxidation products. [1] However, there are some differences between standard methods that can influence the results obtained: for example, some calculations assume that nitrogen released from organic compounds is generated as ammonia, whereas others allow for ammonia oxidation to ...

  5. Chemical oxygen demand - Wikipedia

    en.wikipedia.org/wiki/Chemical_oxygen_demand

    In environmental chemistry, the chemical oxygen demand (COD) is an indicative measure of the amount of oxygen that can be consumed by reactions in a measured solution. It is commonly expressed in mass of oxygen consumed over volume of solution, which in SI units is milligrams per liter ( mg / L ).

  6. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Dissolved oxygen concentrations may be measured directly in wastewater, but the amount of oxygen potentially required by other chemicals in the wastewater is termed as oxygen demand. Dissolved or suspended oxidizable organic material in wastewater will be used as a food source.

  7. Electro-oxidation - Wikipedia

    en.wikipedia.org/wiki/Electro-oxidation

    Where j L is the limiting current density (A/m 2), F is the Faraday's constant (96'485 C/mol), k d is the mass transfer coefficient (m/s), COD is the chemical oxygen demand for the organic pollutant (g/dm 3) and 8 is the oxygen equivalent mass. [29] According to this equation, the lower the COD the lower the corresponding limiting current.

  8. 19 Light Lunches to Make Forever - AOL

    www.aol.com/19-light-lunches-forever-130000839.html

    This high-protein veggie sandwich formula is perfect for when you want to try something new. Our combination of hummus, avocado, feta and veggies is satisfying and tasty. View Recipe.

  9. Winkler titration - Wikipedia

    en.wikipedia.org/wiki/Winkler_titration

    To determine five-day biochemical oxygen demand (BOD 5), several dilutions of a sample are analyzed for dissolved oxygen before and after a five-day incubation period at 20 °C in the dark. In some cases, bacteria are used to provide a standardized community to uptake oxygen while consuming the organic matter in the sample; these bacteria are ...