Ultrasound assisted biogas production from landfill leachate

Comparison of Anaerobic Degradation Processes for Bioenergy Generation from Liquid Fraction of Pressed Solid Waste

“…Nevertheless, landfill leachate may be taken into account as a material which has more or less similar origin than LPW since it is also derived (at least in part) from solid wastes. Oz and Yarimtepe [30] investigated the utilization of raw landfill leachate (28.5 g COD L -1 , 0.35 BOD COD -1 ) for biogas evolution in batch reactors under mesophilic temperature (35°C) and 1.13 L biogas L -1 day -1 yield accompanied by 44 % soluble COD reduction was achieved. These research outcomes more or less agree with the ones in this study, where 0.31 L biogas L -1 day -1 gas yields and 52.3 % COD removal efficiency could be reached.…”

“…These research outcomes more or less agree with the ones in this study, where 0.31 L biogas L -1 day -1 gas yields and 52.3 % COD removal efficiency could be reached. Furthermore, it was shown that (ultrasound) pretreatment of leachate can significantly enhance the anaerobic decomposition efficiency since it increases the soluble COD/total COD ratio and subsequently the amount of accessible substances for the bacteria [30]. Hence, this strategy may be equally useful for the management of LPW in the future.…”

Soybean Straw, Corn Stover and Sunflower Stalk as Possible Substrates for Biogas Production in Croatia: A Review

“…It is usually used for pretreatment of water, industrial wastewater, sludge, manure, and different liquid effluents. 74,79 Liqian 80 compared the performance of different pretreatment methods (thermal, chemical and ultrasound) on agricultural biomasses. Ultrasound had a positive effect on the methane yield (increase up to 40 %) but considering the high energy input, it was stated as not profitable pretreatment.…”

Enhanced biogas production from landfill leachate by low frequency ultrasound

“…In literature; there are several studies which have investigated the increase of organic matter solubilisation by low frequency ultrasound for sludge and manure (Dewil et al [28]; Elbeshbishy et al [17]; Bougrier et al [29] and Luste and Luostrarinen [30]). However, there are a few studies for wastewater (Sangave and Pandit [31], Gibson et al [32] and Oz and Uzun [33]) and only two studies for landfill leachate (Oz and Yarimtepe [23]; Bohdziewicz et al [24]), so far. In these studies; increase in solubilization has been reported as 35% at 600 W/l for 45 min sonication.…”

“…It has been reported that especially low frequency ultrasonic pretreatment improves complex organic matter degradation by reducing particle size (Nickel and Neis [19]; Bougrier et al [20]). Low frequency ultrasound treatment has been used for landfill leachate in limited studies (Wnag et al [21]; Neczaj et al [22]) and ultrasound pretreatment prior to anaerobic treatment have been examined only in two studies for landfill leachate (Oz and Yarimtepe [23]; Bohdziewicz et al [24]), so far. In these studies, it has been reported that ultrasound pretreatment combined with anaerobic processes enhance organic matter degradation and improve both biogas production rate and methane yield of biogas in landfill leachate.…”