The combined effect of ultrasonic and microwave pre-treatment on bio-methane generation from co-digestion of petrochemical wastewater. (1st March 2017)

• Record Type: Journal Article
• Authors: Siddique, Md Nurul Islam; Munaim, Mimi Sakinah Abdul; Wahid, Zularisam Bin Abdul
• Is Part Of: Journal of cleaner production. Volume 145(2017)
• Page Start: 303
• Page End: 309
• Publication Date: 2017-03-01
• Subjects: Anaerobic co-digestion -- Petrochemical wastewater -- Microwave pre-treatment -- Methane production -- Ultrasonic pre-treatment; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2017.01.061
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: This work investigates the combined influence of ultrasonic and microwave pre-treatment on bio-methane generation from anaerobic digestion of petrochemical wastewater and waste activated sludge. The results revealed that co-digestion of waste activated sludge with petrochemical wastewater produced approximately 0.22 L CH4 /g VSadded . However, the highest bio-methane generations from individual digestion of petrochemical wastewater and un-pretreated waste activated sludge were 0.19 and 0.17 L CH4 /g VSadded, respectively. In addition, co-digestion enhanced bio-methane generation by 18%–32% relative to individual digestion of the wastes. Using microwave and ultrasonic pre-treatments on the waste sludges before the co-digestion process resulted in supplementary enhancement of bio-methane generation by 53% and 25%, respectively, relative to co-digestion with un-pretreated waste activated sludges. The maximum biogas and bio-methane productions, 0.47 L/g VSadded and 0.33 L CH4 /g VSadded, were attained from the co-digestion of 30-min microwave pre-treated waste activated sludge and petrochemical wastewater, respectively. The scientific contribution of the present work on the influence of microwave pre-treatment may play a role in the development of an energy-efficient strategy for waste management. Graphical abstract: Highlights: Assessment of biogas generations of co-digestion and individual-digestion. Use of microwave and ultrasonic pre-treatments. Previous studies do not provide specific data on pre-treatment and co-digestion. Co-digestion improved the bio-methane production by 18–32%. Co-digestion and pre-treatment enhanced bio-methane generation by 53% and 25%.