Improved anaerobic digestion of palm oil mill effluent and biogas production by ultrasonication pretreatment

Isa, Mohamed Hasnain; Wong, Lai-Peng; Bashir, Mohammed J.K.; Shafiq, Nasir; Kutty, Shamsul Rahman Mohamed; Farooqi, Izharul Haq; Lee, How Chinh

doi:10.1016/j.scitotenv.2020.137833

Cited by 50 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various studies showed that the thermophilic condition (50 ± 1 • C) was able to achieve better solubility of organic matter [34]. However, a higher temperature of 45 • C was able to reduce the activation energy at the same time, achieving a higher activity of microbes [35]. Despite that, the mesophilic condition of AD was better at ensuring the stability of the entire AD process.…”

Section: Anaerobic Digestion (Ad)mentioning

confidence: 99%

Enhancement of Electrochemical–Anaerobic Digested Palm Oil Mill Effluent Waste Activated Sludge in Solids Minimization and Biogas Production: Bench–Scale Verification

Yap

Heng

et al. 2023

Processes

View full text Add to dashboard Cite

The development of the palm oil industry has induced the generation of palm oil mill effluent (POME) together with its waste activated sludge (WAS) in recent years. This study aims to discover new opportunities in treating POME WAS that has high organic content with low degradability but having potential in converting waste into energy. The optimized electrochemical oxidation (EO) of pre-treated WAS was applied prior to anaerobic digestion (AD) to improve the POME WAS digestibility (by assessing its solids minimization and biogas production) under mesophilic conditions at 30 ± 0.5 °C and solids retention time of 15 days. The enhancement in sludge minimization was verified, with 1.6-fold over the control at steady-state. Promising results were obtained with a total chemical oxygen demand (COD) removal of 68.8% with 11.47 mL CH4/g CODadded in pre-treat digester, compared with 37.1% and 3.9 mL CH4/g CODadded in control digester. It is also worth noting that the specific energy (SE) obtained for this EO pre-treated AD system is 2505 kJ/kg TS with about 94% increment in methane production. It is evident that this system was applicable on POME WAS in ameliorating solids minimization as well as enhancing biogas production.

show abstract

Section: Anaerobic Digestion (Ad)mentioning

confidence: 99%

Enhancement of Electrochemical–Anaerobic Digested Palm Oil Mill Effluent Waste Activated Sludge in Solids Minimization and Biogas Production: Bench–Scale Verification

Yap

Heng

et al. 2023

Processes

View full text Add to dashboard Cite

show abstract

“…This pretreatment method is one of the most commonly used in full scale FW treatment plants since the EU regulation EC1774/2002 imposes FW pasteurization before its utilization (Ariunbataar et al, 2014). Ultrasonic pretreatment is a more appealing technology that disintegrates long chain organic compounds thanks to the vibration and the high-pressure environment generated inside the ultrasonic bath (Isa et al, 2020; Rajesh Banu et al, 2020). These two kinds of pretreatments have been studied for their influence on the methane/biohydrogen production process.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal and ultrasonic pretreatment on lactic acid fermentation of food waste

et al. 2022

View full text Add to dashboard Cite

Food waste (FW) generation has become one of the largest environmental concerns for human society. Thanks to its chemical features and its high biodegradability, FW can be used as starting platform to produce biocommodities. Lactic acid (LA) is one of those chemicals that is gaining the attention of industry and research for its important role in polylactic acids production. To exploit better the organic content of FW, several FW pretreatments have been proposed in the literature, though none of them were aimed at influencing LA fermentation. Thermal and ultrasonic pretreatment effects on solubilization rates and LA production yields have been investigated in this batch study. The highest solubilization rate was achieved with 30 minutes ultrasonic pretreated FW resulting in a 15% increment in soluble COD (sCOD). The highest LA yield was obtained after 90-minute thermal pretreatment at 80 and 100°C at a yield of 0.49 g LA•g COD−1. This study shows that ultrasonic pretreatment generally performed better than thermal pretreatment when considering the increase in sCOD but caused a reduction in LA concentrations and yields after fermentation with high production of ethanol. The opposite trend was recorded in the thermal pretreated incubations, in which LA was present for 50% of the sCOD with higher LA concentrations of 2.90 g COD•L−1.

show abstract

“…The process of palm oil extraction generates several types of waste in solid, liquid and gas forms during the milling process of the fresh fruit bunches. These by-products included but are not limited to: empty fruit bunches, oil palm shell and fuel ash, methane gas and palm oil mill effluent (POME), which can lead to serious environmental issues if it was directly discharged in the water streams [2,3]. Untreated POME is brown in color and full of colloidal suspension with an unpleasant and pungent smell, which consists of 95% water, 4% total solids and 0.7% oil [4].…”

Section: Introductionmentioning

confidence: 99%

“…As POME that is not treated properly will cause environmental pollution especially water pollution, it has to undergo treatment before being safety discharged. Since POME is rich in organic components, the industries mostly used anaerobic and aerobic lagoons to treat POME [2,5]. However, these methods did not achieve high efficiency in lowering the COD and total suspended solids (TSS) content, as well as removing the brownish color of the POME.…”

Section: Introductionmentioning

confidence: 99%

Advanced Treatment of Palm Oil Mill Effluent Using Thermally Activated Persulfate Oxidation

Bashir

Sheen

et al. 2022

Separations

View full text Add to dashboard Cite

Advanced treatment of biologically processed palm oil mill effluent (BIOTPOME), which possesses a potential danger to the water sources is required to meet the Malaysian discharge standard, as BIOTPOME contains high level of chemical oxygen demand (COD), suspended solids and oil and grease even after going through conventional treatment process. The significant but insufficient treatment efficiency of ponding system in Malaysia urged an alternative method to treat the recalcitrant organic compounds. Thus, post-treatment of BIOTPOME using oxidation by thermally activated persulfate process was proposed to solve this issue. In order to maximize the removal of COD and color, the central composite design (CCD) module of the response surface approach was used to optimize the interactions of the process variables temperature, S2O82−/COD ratio, and reaction time. In order to identify the significant terms of interacting process factors, CCD performed a batch study from which statistical models of responses were created. All models were confirmed by analysis of variance (ANOVA) showing significances with Prob > F less than 0.1. The optimal performance was obtained at the temperature of 67.4 °C, S2O82−/COD ratio of 9.8 and reaction time of 120 min, rendering COD removal of 85.65% and color removal of 85.74%. The total cost for the treatment process was RM0.94 per liter.

show abstract

Improved anaerobic digestion of palm oil mill effluent and biogas production by ultrasonication pretreatment

Cited by 50 publications

References 28 publications

Enhancement of Electrochemical–Anaerobic Digested Palm Oil Mill Effluent Waste Activated Sludge in Solids Minimization and Biogas Production: Bench–Scale Verification

Enhancement of Electrochemical–Anaerobic Digested Palm Oil Mill Effluent Waste Activated Sludge in Solids Minimization and Biogas Production: Bench–Scale Verification

Effect of thermal and ultrasonic pretreatment on lactic acid fermentation of food waste

Advanced Treatment of Palm Oil Mill Effluent Using Thermally Activated Persulfate Oxidation

Contact Info

Product

Resources

About