Biomethane Production and Palm Oil Mill Effluent Treatment by Co-Cultivation of Nannochloropsis oculata

2014 ◽  
Vol 625 ◽  
pp. 818-821 ◽  
Author(s):  
Ashfaq Ahmad ◽  
Syed Muhammad Usman Shah ◽  
Mohd Fariduddin Othman ◽  
Mohd Azmuddin Abdullah
Keyword(s):  
Response Surface Methodology ◽  
Factorial Design ◽  
Palm Oil ◽  
Oil Palm ◽  
Biogas Production ◽  
Nannochloropsis Oculata ◽  
Effluent Treatment ◽  
Empty Fruit Bunches ◽  
Biomethane Production ◽  
Palm Oil Mill

Co-cultivation ofNannochloropsisoculatawith Oil Palm Empty Fruit Bunches (OPEFB) was explored for biomethane production and POME treatment. The experimental results were analyzed and modeled using a multilevel factorial design (MFD) of response surface methodology (RSM). Maximum specific biogas production rate (0.126 m3kg-1COD day-1) and biomethane production (4813.0 mL CH4L-1POME day-1) were achieved with 2 mL mL-1POME of microalgae and OPEFB 0.12 g mL-1POME. POME treatment after 3 and 7 days with microalgae achieved higher removal efficiency (56-98%) of COD, BOD and TOC, than without microalgae.

Evaluation of Aerobic and Anaerobic Co-Digestion of Tetraselmis suecica and Oil Palm Empty Fruit Bunches by Response Surface Methodology

2014 ◽  
Vol 925 ◽  
pp. 243-247 ◽  
Author(s):  
Ashfaq Ahmad ◽  
Syed Muhammad Usman Shah ◽  
Azizul Buang ◽  
Mohd Fariduddin Othman ◽  
Mohd Azmuddin Abdullah
Keyword(s):  
Oil Palm ◽  
Hydraulic Retention Time ◽  
Biogas Production ◽  
Anaerobic Treatment ◽  
Tetraselmis Suecica ◽  
Empty Fruit Bunches ◽  
Order Polynomial ◽  
Biomethane Production ◽  
Palm Oil Mill ◽  
Aerobic And Anaerobic

This study investigated co-cultivation of Tetraselmis suecica microalgae with Oil Palm empty fruit bunch (OPEFB) for anaerobic biomethane production and Palm oil mill effluent (POME) treatment. The highest specific biogas production (0.1162 m3 kg-1 COD day-1) and biomethane yield (3900.8 mL CH4 L-1 POME day-1) was achieved with microalgae at 2 mL mL-1 POME, and OPEFB at 0.12 g mL-1 POME. Without co-digestion of microalgae, higher specific biogas production (0.1269 m3 kg-1 COD day-1) but lower biomethane yield (3641.8 mL CH4 L-1 POME day-1) were observed. Second order polynomial model fits the data well with less than 5% error. Higher removal efficiency (62-95%) of COD, BOD, TOC and TN were achieved by aerobic and anaerobic treatment of POME with microalgae than without microalgal treatment after 3 and 7 days of hydraulic retention time (HRT).

ANAEROBIC CO-CULTIVATION OF MULTI-ALGAL SPECIES WITH OIL PALM EMPTY FRUIT BUNCHES FOR MILL EFFLUENT TREATMENT AND BIOMETHANE PRODUCTION

2016 ◽  
Vol 78 (5-6) ◽  
Author(s):  
Ashfaq Ahmad ◽  
Syed Muhammad Usman Shah ◽  
Azizul Buang ◽  
Mohd Azmuddin Abdullah
Keyword(s):  
Oil Palm ◽  
Biogas Production ◽  
Algal Species ◽  
Anaerobic Treatment ◽  
Effluent Treatment ◽  
Empty Fruit Bunches ◽  
Chlorella Sp ◽  
Biomethane Production ◽  
Predicted Values ◽  
Good Agreement

This study investigated the optimization of anaerobic co-cultivation of multi-algal species with Oil Palm Empty Fruit Bunches (OPEFB) for Palm Oil Mill Effluent (POME) treatment and biomethane production. The highest removal of COD (95-98%), BOD (90-98%), TOC (81-86%) and TN (78-80%) were achieved after 7 days anaerobic treatment with the presence of microalgae. The highest biomethane (4,651.9 mL CH4/L POME/day) and the specific biogas production rate (0.124 m3/kg COD/day) with CO2 (2,265.9mL CO2/L POME/day) were achieved by co-cultivating N. oculata and Chlorella sp. (each at 1 mL/mL POME) with OPEFB (0.12 g/mL POME). The combination of N. oculata (2 mL/mL POME) with T. suecica or Chlorella sp. (each at 1 mL/mL POME), and OPEFB (0.12 g/mL POME) obtained high biomethane (4,018.9 mL CH4/L POME /day) but lower biogas (0.097 m3/kg COD/day) and CO2 (2,079.5mL CO2/L POME/day). Generally, low OPEFB and having all the three strains or increasing the level of any (2 mL/mL POME) especially T. suecica, could lower biomethane (870-953 mL CH4/L POME/day) and CO2 (803-854mL CO2/L POME/day), with the biogas around 0.08-0.09 m3/kg COD/day. The optimum conditions were predicted by Response Surface Methodology and the multiple coefficients of determination, r2, of 86% suggests good agreement between experimental and predicted values.

scholarly journals Enhancement of Thermophilic Biogas Production from Palm Oil Mill Effluent by pH Adjustment and Effluent Recycling

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 878
Author(s):  
Apinya Singkhala ◽  
Chonticha Mamimin ◽  
Alissara Reungsang ◽  
Sompong O-Thong
Keyword(s):  
Palm Oil ◽  
Oil Palm ◽  
Biogas Production ◽  
Optimal Dose ◽  
Methane Yield ◽  
Ph Adjustment ◽  
Oil Palm Ash ◽  
Palm Oil Mill ◽  
Archaea Community ◽  
Effluent Recycling

A sudden pH drops always inhibits the anaerobic digestion (AD) reactor for biogas production from palm oil mill effluent (POME). The pH adjustment of POME by oil palm ash addition and the biogas effluent recycling effect on the preventing of pH drop and change of the archaea community was investigated. The pH adjustment of POME to 7.5 increased the methane yield two times more than raw POME (pH 4.3). The optimal dose for pH adjustment by oil palm ash addition was 5% w/v with a methane yield of 440 mL-CH4/gVS. The optimal dose for pH adjustment by biogas effluent recycling was 20% v/v with a methane yield of 351 mL-CH4/gVS. Methane production from POME in a continuous reactor with pH adjustment by 5% w/v oil palm ash and 20% v/v biogas effluent recycling was 19.1 ± 0.25 and 13.8 ± 0.3 m3 CH4/m3-POME, respectively. The pH adjustment by oil palm ash enhanced methane production for the long-term operation with the stability of pH, alkalinity, and archaea community. Oil palm ash increased the number of Methanosarcina mazei and Methanothermobacter defluvii. Oil palm ash is a cost-effective alkali material as a source of buffer and trace metals for preventing the pH drop and the increased methanogen population in the AD process.

scholarly journals Biogas Production from Oil Palm Empty Fruit Bunches and Palm Oil Decanter Cake using Solid-State Anaerobic co-Digestion

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4368
Author(s):  
Muthita Tepsour ◽  
Nikannapas Usmanbaha ◽  
Thiwa Rattanaya ◽  
Rattana Jariyaboon ◽  
Sompong O-Thong ◽  
...  
Keyword(s):  
Solid State ◽  
Palm Oil ◽  
Oil Palm ◽  
Biogas Production ◽  
C:N Ratio ◽  
Total Solid ◽  
Order Kinetic ◽  
Empty Fruit Bunches ◽  
Decanter Cake ◽  
Palm Oil Decanter Cake

Oil palm empty fruit bunches (EFB) and palm oil decanter cake (DC) were used to investigate biogas production by using solid-state anaerobic co-digestion (SS-AcoD) with 15% total solid (TS) content. Solid state anaerobic digestion (SS-AD) using substrate to inoculum (S:I) ratio of 3:1, methane yields of 353.0 mL-CH4/g-VS and 101.5 mL-CH4/g-VS were respectively achieved from mono-digestion of EFB without oil palm ash (OPA) addition and of DC with 10% OPA addition under mesophilic conditions 35 °C. By adding 5% OPA to SS-AD using 3:1 S:I ratio under thermophilic conditions (55 °C), mono-digestion of EFB and DC provided methane yields of 365.0 and 160.3 mL-CH4/g-VS, respectively. Furthermore, SS-AcoD of EFB:DC at 1:1 mixing ratio (volatile solid, VS basis), corresponding to carbon to nitrogen (C:N) ratio of 32, gathering with S:I ratio of 3:1 and 5% ash addition, synergistic effect is observed together with similar methane yields of 414.4 and 399.3 mL-CH4/g-VS, achieved under 35 °C and 55 °C, respectively. According to first order kinetic analysis under synergistic condition, methane production rate from thermophilic operation is 5 times higher than that from mesophilic operation. Therefore, SS-AcoD could be potentially beneficial to generate biogas from EFB and DC.

scholarly journals Enhanced Biogas Production from Palm Oil Mill Effluent Supplemented with Untreated Oil Palm Empty Fruit Bunch Biomass with a Change in the Microbial Community

2012 ◽  
Vol 13 (3) ◽  
pp. 37-41 ◽  
Author(s):  
Ahmad Amiruddin Mohd ALI ◽  
Mohd Huzairi Mohd ZAINUDIN ◽  
Azni IDRIS ◽  
Azhari Samsu BAHARUDDIN ◽  
Alawi SULAIMAN ◽  
...  
Keyword(s):  
Microbial Community ◽  
Palm Oil ◽  
Oil Palm ◽  
Biogas Production ◽  
Palm Oil Mill Effluent ◽  
Empty Fruit Bunch ◽  
Palm Oil Mill
Sign in / Sign up

Export Citation Format

Share Document