Treatment of palm oil mill effluent (POME) using hybrid up flow anaerobic sludge blanket (HUASB) reactor

Badroldin, Nur Azeera (2010) Treatment of palm oil mill effluent (POME) using hybrid up flow anaerobic sludge blanket (HUASB) reactor. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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Abstract

Malaysia currently accounts for 51% of world palm oil production and 62% of world exports. In 2004, it was reported that Malaysia produces 14 million tons of palm oil planted on 38 000 square kilometers of land. This generates an enormous amount of liquid effluent known as palm oil mill effluent (POME) and consequently creates significant amount of pollution when released into rivers and lakes without proper treatment. Currently, the POME is treated using several methods such as cascade anaerobic ponds, anaerobic sludge fixed-film bioreactor and confined anaerobic digester. However, they have disadvantages of requiring vast land area, long hydraulic retention time (HRT) and low treatment efficiency. Besides that, the up-flow anaerobic sludge blanket (UASB) reactor has also been used to remove high pollutant loads of effluent from industrial wastewater. However in this study, hybrid upflow anaerobic sludge blanket (HUASB) reactors have been used to treat the POME. The aims of this research are to verify the performance of HUASB reactor and determine the optimum volumetric organic loading (OLR). Three reactors which are fixed with filter media of coarse gravels (R1), fine gravels (R2) and crushed glass (R3) were used to treat POME from Kian Hoe Plantation Sdn. Bhd. At the start of reactors operation, the OLR was fixed at 1.83 gCOD/L.d and HRT of 2.73 d until they reached steady state condition at 47 days for R1 and R2 and 42 days for R3. The OLRs were then gradually increased up to the loading of 9.17 gCOD/L.d for R1, 12.84 gCOD/L.d for R2 and 11.92 gCOD/l.d for R3. Whereas the HRTs were gradually decreased from 2.73 d to 0.55 d for R1, 0.39 d for R2 and 0.42 d for R3. The maximum efficiency of reactors in removing COD yields up to 97% with the loading of 5.5 gCOD/L.d for R1, 8.25 gCOD/L.d for R2 and 11.92 gCOD/L.d for R3. The use of packing materials in the HUASB reactors can avoid the floatation of poor settling particles and preventing washout of biomass from the reactors. This contributed to the increase in efficiency of the reactors.

Item Type:Thesis (Masters)
Subjects:T Technology > TD Environmental technology. Sanitary engineering > TD511-780 Sewage collection and disposal systems. Sewerage
ID Code:1648
Deposited By:Normajihan Abd. Rahman
Deposited On:19 Sep 2011 13:40
Last Modified:19 Sep 2011 13:40

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