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Recycling of palm oil industrial wastes using vermicomposting technology: its kinetics study and environmental application

Rupani, P. F. and Embrandiri, A. and Ibrahim, M. H. and Shahadat, M. and Hansen, S. B. and Ismail, S. A. and Ab. Kadir, M. O. (2017) Recycling of palm oil industrial wastes using vermicomposting technology: its kinetics study and environmental application. Environmental Science and Pollution Research, 24 (14). pp. 12982-12990. ISSN 0944-1344

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Abstract

The present paper reports management of palm oil mill effluent (POME) mixed with palm-pressed fibre (PPF) POME-PPF mixture using eco-friendly, cost-effective vermicomposting technology. Vermicomposting of POME-PPF was performed to examine the optimal POME-PPF ratio with respect to the criteria of earthworm biomass and to evaluate the decomposition of carbon and nitrogen in different percentages of POME-PPF mixtures. Chemical parameters such as TOC, N, P and K contents were determined to achieve optimal decomposition of POME-PPF. On this basis, the obtained data of 50% POME-PPF mixture demonstrated more significant results throughout the experiment after addition of the earthworms. However, 60 and 70% mixtures found significant only in the last stages of the vermicomposting process. The decomposition rate in terms of -ln (CNt/CNo) showed that the 50% mixture has higher decomposition rate as compared to the 60 and 70% (k50% = 0.0498 day−1). The vermicomposting extracts (50, 60 and 70%) of POME-PPF mixtures were also tested to examine the growth of mung bean (Vigna radiata). It was found that among different extract dilutions, 50% POME-PPF vermicompost extract provided longer root and shoot length of mung bean. The present study concluded that the 50% mixture of POME-PPF could be chosen as the optimal mixture for vermicomposting in terms of both decomposition rate and fertilizer value of the final compost.

Item Type:Article
Uncontrolled Keywords:palm-pressed fibre (PPF), eco-friendly
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:76156
Deposited By: Widya Wahid
Deposited On:30 May 2018 12:25
Last Modified:30 May 2018 12:25

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