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Flocculation kinetics and dewatering studies of quaternized cellulose derived from oil palm empty fruit bunches

Mohtar, Safia Syazana and Saman, Norasikin and Md. Noor, Ahmad Mujahid and Tengku Malim Busu, Tengku Nur Zulaikha and Yusoff, Nor Aida and Mat, Hanapi (2019) Flocculation kinetics and dewatering studies of quaternized cellulose derived from oil palm empty fruit bunches. Korean Journal of Chemical Engineering, 36 (5). pp. 669-677. ISSN 0256-1115

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Official URL: http://dx.doi.org/10.1007/s11814-019-0250-x

Abstract

Flocculation kinetics and sludge dewatering of kaolin suspension as influenced by various q-EFBC flocculant dosing were studied. In this study, 62.5mg L −1 q-EFBC exhibited the highest turbidity removal efficiency of 99.53±0.08%. The adsorption rate of kaolin towards 12.5mg L −1 to 112.5mg L −1 q-EFBC dosing increased rapidly for t<60 s and became gradual before completion. The mass transfer coefficient was independent of dosage. The experimental data best-fitted the non-linear pseudo-first order due to the R 2 >0.99 and the lowest standard deviation. The highest rate constant of particle aggregation and breakage was consistent with the highest rate constant of particle collision, which led to the highest turbidity removal at the optimal dosage. The rate-limiting steps in the flocculation process were particle collision and aggregation since their rate constant was lower than the other kinetic constants. The lower values of SRF and TTF of treated sludge as compared to the untreated one confirmed the improvement in the dewaterability characteristic. The lowest TTF (37.44±1.44 s) and SRF (1.49×1010 m kg −1 ) was observed for 62.5mg L −1 q-EFBC. The high turbidity removal and improved sludge dewaterability indicate the potential application of q-EFBC for water treatment.

Item Type:Article
Uncontrolled Keywords:adsorption, cellulose, flocculation, kinetics, turbidity removal
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:87842
Deposited By: Yanti Mohd Shah
Deposited On:30 Nov 2020 21:28
Last Modified:30 Nov 2020 21:28

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