TY  - JOUR
ID  - scholars16952
TI  - Hydrolysis kinetics for solubilizing waste activated sludge at low temperature thermal treatment derived from multivariate non-linear model
KW  - Biodegradability; Biodegradable polymers; Chemical oxygen demand; Hydrolysis; Kinetics; Nonlinear systems; Solubility
KW  -  Hydrolysis kinetics; Low temperature thermal pre-treatment; Lows-temperatures; Modeling; Non-linear modelling; Sludge hydrolysis; Sludge solubilization; Thermal pre-treatment; Treatment duration; Waste activated sludges
KW  -  Temperature
KW  -  bovine serum albumin; carbohydrate; protein
KW  -  activated sludge; hydrolysis; low temperature; reaction kinetics; solubility; temperature effect
KW  -  activated sludge; anaerobic digestion; Article; biodegradability; chemical oxygen demand; dry weight; humic substance; hydrolysis kinetics; low temperature; Lowry assay; moisture; multivariate non linear model; nonhuman; oxygen consumption; particulate chemical oxygen demand; pH; physical chemistry; prediction; sludge hydrolysis; solubilization; soluble chemical oxygen demand; suspended particulate matter; temperature; thermal pre treatment; thermostability; treatment duration; waste solubilizing; waste water management; wet weight; anaerobic growth; hydrolysis; kinetics; nonlinear system; sewage
KW  -  Anaerobiosis; Hydrolysis; Kinetics; Nonlinear Dynamics; Sewage; Temperature; Waste Disposal
KW  -  Fluid
N2  - Low temperature thermal pre-treatment is a low-cost method to break down the structure of extracellular polymeric substances in waste activated sludge (WAS) while improving the sludge biodegradability. However, previous models on low temperature thermal pre-treatment did not adequately elucidate the behaviour of sludge hydrolysis process for the duration ranging from 5 to 9 h. Therefore, this work had developed an inclusive functional model to describe the kinetics of sludge hydrolysis for a wide range of treatment conditions (30 °Câ??90 °C within 0 and 16 h). As compared with treatment duration, the treatment temperature played a greater impact in solubilizing WAS. Accordingly, the 90 °C treatment had consistently produced WAS with the highest degree of solubility. Nonetheless, the mediocre discrepancies between 90 °C and 75 °C may challenge the practicality of increasing the treatment temperatures beyond 75 °C. The effects of treatment duration on soluble chemical oxygen demand, soluble carbohydrate and soluble protein were only significant during the first 4 h, except for humic substances release that continued to increase with treatment duration. Finally, a good fit with R2 > 0.95 was achieved using an inclusive multivariate non-linear model, substantiating the functionality to predict the kinetics of sludge hydrolysis at arbitrary treatment conditions. © 2021 Elsevier Ltd
N1  - cited By 4
AV  - none
VL  - 292
A1  - Liew, C.S.
A1  - Raksasat, R.
A1  - Rawindran, H.
A1  - Kiatkittipong, W.
A1  - Lim, J.W.
A1  - Leong, W.H.
A1  - Lam, M.K.
A1  - Mohamad, M.
A1  - Cheng, Y.W.
A1  - Chong, C.C.
JF  - Chemosphere
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122072682&doi=10.1016%2fj.chemosphere.2021.133478&partnerID=40&md5=51615a6ff5dd10f28f519b03e580e42e
PB  - Elsevier Ltd
SN  - 00456535
Y1  - 2022///
ER  -