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Zero discharge performance of an industrial pilot-scale plant treating palm oil mill effluent.

Wang J, Mahmood Q, Qiu JP, Li YS, Chang YS, Chi LN, Li XD - Biomed Res Int (2015)

Bottom Line: Huge quantities of palm oil mill effluent (POME) pose a great threat to aqueous environment due to its very high COD.After filtration by UF and RO membrane, all organic compounds and most of the salts were removed; RO permeate could be reused as the boiler feed water.RO concentrate combined with anaerobic surplus sludge could be used as biofertilizer.

View Article: PubMed Central - PubMed

Affiliation: College of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.

ABSTRACT
Palm oil is one of the most important agroindustries in Malaysia. Huge quantities of palm oil mill effluent (POME) pose a great threat to aqueous environment due to its very high COD. To make full use of discharged wastes, the integrated "zero discharge" pilot-scale industrial plant comprising "pretreatment-anaerobic and aerobic process-membrane separation" was continuously operated for 1 year. After pretreatment in the oil separator tank, 55.6% of waste oil in raw POME could be recovered and sold and anaerobically digested through 2 AnaEG reactors followed by a dissolved air flotation (DAF); average COD reduced to about 3587 mg/L, and biogas production was 27.65 times POME injection which was used to generate electricity. The aerobic effluent was settled for 3 h or/and treated in MBR which could remove BOD3 (30°C) to less than 20 mg/L as required by Department of Environment of Malaysia. After filtration by UF and RO membrane, all organic compounds and most of the salts were removed; RO permeate could be reused as the boiler feed water. RO concentrate combined with anaerobic surplus sludge could be used as biofertilizer.

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Related in: MedlinePlus

Photograph of all effluent samples from all main units of the POME pilot plant. Note: sample (1) raw POME; (2) anaerobic EGSB+DAF outlet; (3) settled 3 h of aerobic outlet; (4) MBR outlet; (5) UF outlet; (6) RO outlet.
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fig5: Photograph of all effluent samples from all main units of the POME pilot plant. Note: sample (1) raw POME; (2) anaerobic EGSB+DAF outlet; (3) settled 3 h of aerobic outlet; (4) MBR outlet; (5) UF outlet; (6) RO outlet.

Mentions: The aerobic process was operated at HRT of 48 h and DO was controlled at about 3.5 mg/L. The effluent COD of biocontact aerobic tank was 579 mg/L after settling for 3 h. To accomplish more stable BOD removal, the aerobic effluent was directly treated in MBR whose final effluent COD was 530 mg/L. It is evident from Figure 5 that MBR accomplished decolourisation partly; however, COD were only reduced 49 mg/L. Both BOD were less than 20 mg/L, achieving the discharge standard set by the Department of Environment (DOE) of Malaysia.


Zero discharge performance of an industrial pilot-scale plant treating palm oil mill effluent.

Wang J, Mahmood Q, Qiu JP, Li YS, Chang YS, Chi LN, Li XD - Biomed Res Int (2015)

Photograph of all effluent samples from all main units of the POME pilot plant. Note: sample (1) raw POME; (2) anaerobic EGSB+DAF outlet; (3) settled 3 h of aerobic outlet; (4) MBR outlet; (5) UF outlet; (6) RO outlet.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4317585&req=5

fig5: Photograph of all effluent samples from all main units of the POME pilot plant. Note: sample (1) raw POME; (2) anaerobic EGSB+DAF outlet; (3) settled 3 h of aerobic outlet; (4) MBR outlet; (5) UF outlet; (6) RO outlet.
Mentions: The aerobic process was operated at HRT of 48 h and DO was controlled at about 3.5 mg/L. The effluent COD of biocontact aerobic tank was 579 mg/L after settling for 3 h. To accomplish more stable BOD removal, the aerobic effluent was directly treated in MBR whose final effluent COD was 530 mg/L. It is evident from Figure 5 that MBR accomplished decolourisation partly; however, COD were only reduced 49 mg/L. Both BOD were less than 20 mg/L, achieving the discharge standard set by the Department of Environment (DOE) of Malaysia.

Bottom Line: Huge quantities of palm oil mill effluent (POME) pose a great threat to aqueous environment due to its very high COD.After filtration by UF and RO membrane, all organic compounds and most of the salts were removed; RO permeate could be reused as the boiler feed water.RO concentrate combined with anaerobic surplus sludge could be used as biofertilizer.

View Article: PubMed Central - PubMed

Affiliation: College of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.

ABSTRACT
Palm oil is one of the most important agroindustries in Malaysia. Huge quantities of palm oil mill effluent (POME) pose a great threat to aqueous environment due to its very high COD. To make full use of discharged wastes, the integrated "zero discharge" pilot-scale industrial plant comprising "pretreatment-anaerobic and aerobic process-membrane separation" was continuously operated for 1 year. After pretreatment in the oil separator tank, 55.6% of waste oil in raw POME could be recovered and sold and anaerobically digested through 2 AnaEG reactors followed by a dissolved air flotation (DAF); average COD reduced to about 3587 mg/L, and biogas production was 27.65 times POME injection which was used to generate electricity. The aerobic effluent was settled for 3 h or/and treated in MBR which could remove BOD3 (30°C) to less than 20 mg/L as required by Department of Environment of Malaysia. After filtration by UF and RO membrane, all organic compounds and most of the salts were removed; RO permeate could be reused as the boiler feed water. RO concentrate combined with anaerobic surplus sludge could be used as biofertilizer.

Show MeSH
Related in: MedlinePlus