DETERMINATION OF THE SPECIFIC GROWTH RATE ON DEGRADATION OF CASSAVA SEWAGE USING MICHAELIS-MENTEN EQUATION

  • IM Jideofor
Keywords: cassava, specific growth rate, sewage, fermentation, batch reactor

Abstract

Sewage generation is one of the dense problems Nigerians encounter on daily bases, mostly at the urbanized area where factories and industries are located. This paper is aimed at determining the specific growth rate “K” of biological activities on cassava wastewater during degradation using Michaelis-Menten Equation. In order to achieve this, cassava wastewater were collected from Onuiyi cassava processing plant at Nsukka urban area after fermentation. The wastewater was tested and analyzed in Civil Engineering Sanitary Laboratory UNN, Nsukka.  An aerobic technique was used to effect the degradation in a batch reactor. Sodium hydroxide (NaOH) was used to oxidize the inhibitor (cyanide) and the results were modeled using Michaelis-Menten equation. Statistical regression analysis was adopted for the calculation of the k-value using the line-weaver burk plot for Michaelis-Menten equation. The result showed higher K-value of 0.7149 at 6 g of NaOH resulting in optimum degradation over other concentrations. The substrate concentration is higher at 10 g and low at 0 g and 2 g. At higher concentration of the 10 g of NaOH the inhibitor was less successful in competing with the substrate optimizing to lower inhibition degree. The model enables us to understand the inhibitor content and the degree of degradation of cassava waste water. There is need for further study on this model, to examine the inhibition factors in cassava waste water degradation.

 

http://dx.doi.org/10.4314/njt.v35i3.27

Published
2016-07-01
Section
Agricultural, Bioresources, Biomedical, Food, Environmental & Water Resources Engineering

Journal Identifiers


eISSN: 2467-8821
print ISSN: 0331-8443