@article{bb2014245,
author={{Nwoye, C. I. and Umeghalu, I. C. E. and Ede, S. E. and Amalu, N. I. and Onyia, W. C. and Idenyi, N. E.},
title={Quadratic Yield Response of Methane Gas to Input Ratio of Organic Loading Rate and Hydraulic Retention Time during Microbial Digestion of Fruit Wastes},
journal={Biomedicine and Biotechnology},
volume={2},
number={4},
pages={93--101},
year={2014},
url={http://pubs.sciepub.com/bb/2/4/5},
issn={2328-4137},
abstract={The yield response of methane gas during microbial digestion of fruit wastes was evaluated based on the operational input ratio of organic loading rate (OLR) and hydraulic retention time (HRT). Computational analysis of generated experimental results indicates that the yield response was empirically a two-factorial quadratic model which was validated for predictive analysis and evaluation. The validity of the model; ŚĆ = 2.1863 (?/?)^{2} - 2.4573 (?/?) + 0.72 was rooted on the core model expression ŚĆ - 0.72 = 2.1863(?/?)^{2} ¨C 2.4573 (?/?) where both sides of the expression are correspondingly approximately equal. Results of methane gas yield were generated using regression model and its trend of distribution was compared with that from derived model for the purpose of verifying its validity relative to experimental results. The results of the verification process show very close dimensions of covered areas and shapes designating methane gas yield, which precisely translated into significantly similar trend of data pointĄŻs distribution for experimental (ExD), derived model (MoD) and regression model-predicted (ReG) results. Methane gas yield per unit input ratio OLR/ HRT were evaluated from experimental, derived model & regression model predicted results as 1.0035, 0.9893 & 0.9574 m^{6} Kg ^{-2 }d^{2} respectively. Standard errors incurred in predicting methane gas yield for each value of OLR, HRT & OLR/HRT considered as obtained from experiment, derived model and regression model were 0.1237, 0.1032 & 0.0226%, 0.1214, 0.1055 & 0.0221 % and 0.122, 0.1032 & 2.5336 x 10^{-5} respectively. The operationally viable deviation range of model-predicted methane gas yield from the experimental results was 3.75-15.25 %. This translated into 84.75-96.26 % operational confidence and reliability level for the derived models, as well as 0.85¨C0.96 yield response coefficient of methane gas to the input ratio OLR/ HRT.},
doi={10.12691/bb-2-4-5}
publisher={Science and Education Publishing}
}