Regenerated spent bleaching earth for the decolourisation and bod reduction of palm oil mill effluent

Rusnani Abd Majid, . and Che Rahmat Che Mat, . Regenerated spent bleaching earth for the decolourisation and bod reduction of palm oil mill effluent. pp. 579-587. ISSN 1511-2780

The aim of the present study is to evaluate the possibility of re-using the regenerated spent bleaching earth subjected to acid and heat treatment to decolourise and reduce the biological oxygen demand (BOD) of the final effluent discharged from palm oil mills. Different types of clays namely spent bleaching earth that has been regenerated using acid and heat treatment after de-oiling (RDSBE-AH) spent bleaching earth (SBE) de-oiled spent bleaching earth (DSBE) and new bleaching earth (NBE) were characterised for their surface area pore volume and functional groups. RDSBE-AH was found to have the highest surface area and pore volume when compared to the other three types of clays with values of 122.3 m2 g-1 and 68 cm3 g-1 respectively. In terms of decolourisation RDSBE-AH exhibited a higher efficiency than NBE. Higher BOD reduction efficiency was found for NBE as compared to RDSBE-AH. The adsorption kinetic models on colour and BOD for both RDSBE-AH and NBE were well described by the pseudo-second order equation with very good coefficient of determination (R2). The results demonstrated that the regenerated SBE produced through the combined acid and heat treatments had the potential to decolourise and reduce the BOD of the palm oil mills final effluent discharge.

Full text available from: Official URL: http://jopr.mpob.gov.my/regenerated-spent-bleachin...

Abstract

The aim of the present study is to evaluate the possibility of re-using the regenerated spent bleaching earth subjected to acid and heat treatment to decolourise and reduce the biological oxygen demand (BOD) of the final effluent discharged from palm oil mills. Different types of clays namely spent bleaching earth that has been regenerated using acid and heat treatment after de-oiling (RDSBE-AH) spent bleaching earth (SBE) de-oiled spent bleaching earth (DSBE) and new bleaching earth (NBE) were characterised for their surface area pore volume and functional groups. RDSBE-AH was found to have the highest surface area and pore volume when compared to the other three types of clays with values of 122.3 m2 g-1 and 68 cm3 g-1 respectively. In terms of decolourisation RDSBE-AH exhibited a higher efficiency than NBE. Higher BOD reduction efficiency was found for NBE as compared to RDSBE-AH. The adsorption kinetic models on colour and BOD for both RDSBE-AH and NBE were well described by the pseudo-second order equation with very good coefficient of determination (R2). The results demonstrated that the regenerated SBE produced through the combined acid and heat treatments had the potential to decolourise and reduce the BOD of the palm oil mills final effluent discharge.

[error in script]

Item Type:	Article
AGROVOC Term:	Palm oils
AGROVOC Term:	Mills
AGROVOC Term:	Adsorption
AGROVOC Term:	Wastewater
AGROVOC Term:	Biochemical oxygen demand
AGROVOC Term:	Bleaching
AGROVOC Term:	Decolorization
AGROVOC Term:	Efficiency
AGROVOC Term:	Heat treatment
AGROVOC Term:	Heating
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/24125

Actions (login required)

View Item