Grey water biodegradability

Biodegradation
Lina Abu GhunmiJules B van Lier

Abstract

Knowing the biodegradability characteristics of grey water constituents is imperative for a proper design and operation of a biological treatment system of grey water. This study characterizes the different COD fractions of dormitory grey water and investigates the effect of applying different conditions in the biodegradation test. The maximum aerobic and anaerobic biodegradability and conversion rate for the different COD fractions is determined. The results show that, on average, dormitory grey water COD fractions are 28% suspended, 32% colloidal and 40% dissolved. The studied factors incubation time, inoculum addition and temperature are influencing the determined biodegradability. The maximum biodegradability and biodegradation rate differ between different COD fractions, viz. COD(ss), COD(col) and COD(diss). The dissolved COD fraction is characterised by the lowest degradation rate, both for anaerobic and aerobic conditions. The maximum biodegradability for aerobic and anaerobic conditions is 86 and 70% respectively, whereas the first order conversion rate constant, k₂₀, is 0.119 and 0.005 day⁻¹, respectively. The anaerobic and aerobic conversion rates in relation to temperature can be described by the Arrhenius relation, ...Continue Reading

References

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Oct 30, 2008·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Lina Abu GhunmiManar Fayyed
Aug 25, 2009·Bioresource Technology·Lina Abu GhunmiJules B van Lier
Aug 10, 2010·Bioresource Technology·L Hernández LealC J N Buisman
Aug 7, 2012·Water Science and Technology : a Journal of the International Association on Water Pollution Research·C P Pabón PereiraJ B van Lier

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Citations

Feb 12, 2013·Environmental Science and Pollution Research International·Dilip M Ghaitidak, Kunwar D Yadav
Sep 2, 2017·FEMS Microbiology Letters·Morkel ZaaymanJacqui Horswell
Mar 18, 2021·Environmental Science and Pollution Research International·Irshad N Shaikh, M Mansoor Ahammed

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