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Anaerobic Treatment of Palm Oil Mill Effluent in Pilot-Scale Anaerobic EGSB Reactor.

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

Bottom Line: Setting HRT at 9.8 d, the anaerobic EGSB reactors reduced COD from 71179 mg/L to 12341 mg/L and recycled half of sludge by a dissolved air flotation (DAF).Bacilli and small coccid bacteria were the dominant microbial species of the reactor.The reactor produced 27.65 m(3) of biogas per m(3) of POME which was utilized for electricity generation.

View Article: PubMed Central - PubMed

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

ABSTRACT
Large volumes of untreated palm oil mill effluent (POME) pose threat to aquatic environment due to the presence of very high organic content. The present investigation involved two pilot-scale anaerobic expanded granular sludge bed (EGSB) reactors, continuously operated for 1 year to treat POME. Setting HRT at 9.8 d, the anaerobic EGSB reactors reduced COD from 71179 mg/L to 12341 mg/L and recycled half of sludge by a dissolved air flotation (DAF). The average effluent COD was 3587 mg/L with the consistent COD removal efficiency of 94.89%. Adding cationic polymer (PAM) dose of 30 mg/L to DAF unit and recycling its half of sludge caused granulation of anaerobic sludge. Bacilli and small coccid bacteria were the dominant microbial species of the reactor. The reactor produced 27.65 m(3) of biogas per m(3) of POME which was utilized for electricity generation.

No MeSH data available.


The variations on COD concentration and removal efficiency.
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fig2: The variations on COD concentration and removal efficiency.

Mentions: The EGSB reactors were operated at HRT of 10 d. The data presented in Figure 2 and Table 2 suggested that anaerobic EGSB accomplished overwhelming COD reduction in spite of daily fluctuations in the influent characteristics. On average, COD decreased from 71179 to 12341 mg/L. After SS removal by DAF, the average COD was 3587 mg/L with COD removal efficiency of 94.89%. As half of the sludge from DAF was recycled to EGSB, it implied that half sludge was biodegraded during the operation.


Anaerobic Treatment of Palm Oil Mill Effluent in Pilot-Scale Anaerobic EGSB Reactor.

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

The variations on COD concentration and removal efficiency.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4488516&req=5

fig2: The variations on COD concentration and removal efficiency.
Mentions: The EGSB reactors were operated at HRT of 10 d. The data presented in Figure 2 and Table 2 suggested that anaerobic EGSB accomplished overwhelming COD reduction in spite of daily fluctuations in the influent characteristics. On average, COD decreased from 71179 to 12341 mg/L. After SS removal by DAF, the average COD was 3587 mg/L with COD removal efficiency of 94.89%. As half of the sludge from DAF was recycled to EGSB, it implied that half sludge was biodegraded during the operation.

Bottom Line: Setting HRT at 9.8 d, the anaerobic EGSB reactors reduced COD from 71179 mg/L to 12341 mg/L and recycled half of sludge by a dissolved air flotation (DAF).Bacilli and small coccid bacteria were the dominant microbial species of the reactor.The reactor produced 27.65 m(3) of biogas per m(3) of POME which was utilized for electricity generation.

View Article: PubMed Central - PubMed

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

ABSTRACT
Large volumes of untreated palm oil mill effluent (POME) pose threat to aquatic environment due to the presence of very high organic content. The present investigation involved two pilot-scale anaerobic expanded granular sludge bed (EGSB) reactors, continuously operated for 1 year to treat POME. Setting HRT at 9.8 d, the anaerobic EGSB reactors reduced COD from 71179 mg/L to 12341 mg/L and recycled half of sludge by a dissolved air flotation (DAF). The average effluent COD was 3587 mg/L with the consistent COD removal efficiency of 94.89%. Adding cationic polymer (PAM) dose of 30 mg/L to DAF unit and recycling its half of sludge caused granulation of anaerobic sludge. Bacilli and small coccid bacteria were the dominant microbial species of the reactor. The reactor produced 27.65 m(3) of biogas per m(3) of POME which was utilized for electricity generation.

No MeSH data available.