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Kim, Jaai
School of Urban and Environmental Engineering
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Effects of temperature and pH on the biokinetic properties of thiocyanate biodegradation under autotrophic conditions

DC Field Value Language Kim, Jaai ko Cho, Kyung-Jin ko Han, Gyuseong ko Lee, Changsoo ko Hwang, Seokhwan ko 2014-04-10T02:22:00Z - 2013-06-17 ko 2013-01 -
dc.identifier.citation WATER RESEARCH, v.47, no.1, pp.251 - 258 ko
dc.identifier.issn 0043-1354 ko
dc.identifier.uri -
dc.identifier.uri ko
dc.description.abstract The simultaneous effects of temperature and pH on the biokinetic properties of thiocyanate biodegradation under mixed-culture, autotrophic conditions were investigated using response surface analysis (RSA) combined with biokinetic modeling. A partial cubic model, based on substrate inhibition biokinetics, was constructed for each kinetic coefficient in Andrew model (i.e., maximum specific growth rate (mu(m)), saturation coefficient (K-S), and substrate inhibition coefficient (K-SI)). Each model proved statistically reliable to approximate the responses of the kinetic coefficients to temperature and pH changes (r(2) > 0.8, p < 0.05). The response surface plots demonstrated that the biokinetic coefficients change with respect to temperature and pH significantly and in different ways. The model response surfaces were substantially different to each other, indicating distinct correlations between the independent (temperature and pH) and dependent (model response) variables in the models. Based on the estimated response surface models, temperature was shown to have significant effects on all biokinetic coefficients tested. A dominant influence of temperature on mu(m) response was observed while the interdependence of temperature and pH was apparent in the K-S and K-SI models. Specific growth rate (mu) versus substrate (i.e., thiocyanate) concentration plots simulating using the obtained response surface models confirmed the significant effects of temperature and pH on the microbial growth rate and therefore on the thiocyanate degradation rate. Overall, the response surface models able to describe the biokinetic effects of temperature and pH on thiocyanate biodegradation within the explored region (20-30 degrees C and pH 6.0-9.0) were successfully constructed and validated, providing fundamental information for better process control in thiocyanate treatment. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.subject Biokinetics ko
dc.subject Degradation rate ko
dc.subject Effects of temperature ko
dc.subject Kinetic coefficient ko
dc.subject Maximum specific growth rates ko
dc.subject Microbial growth rate ko
dc.subject Model response ko
dc.subject pH change ko
dc.subject Response surface analysis ko
dc.subject Response surface models ko
dc.subject Response surface plot ko
dc.subject Saturation coefficient ko
dc.subject Specific growth rate ko
dc.subject Substrate inhibition ko
dc.subject Thiocyanate biodegradation ko
dc.title Effects of temperature and pH on the biokinetic properties of thiocyanate biodegradation under autotrophic conditions ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84870066171 ko
dc.identifier.wosid 000313386300026 ko
dc.type.rims ART ko
dc.description.wostc 3 *
dc.description.scopustc 2 * 2015-02-28 * 2014-08-20 *
dc.identifier.doi 10.1016/j.watres.2012.10.003 ko
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