Enhancement of biomethane potential of brown sludge by pre-treatment using vortex based hydrodynamic cavitation

Preliminary analysis: Effect of a rotary generator of hydrodynamic cavitation on rheology and methane yield of wastewater sludge

“…To the best of our knowledge, the only studies that have investigated the effect of HC on rheological properties of sludge are those conducted by Zupanc et al [7] and Islam et al [65] , [66] . The former study focused on the effects of different HC regimes on WAS.…”

Enhancing Bmp and Digestibility of Daf Sludge Via Hydrodynamic Cavitation

“…Bench scale hydrodynamic cavitation pretreatment was used for the treatment of DAF sludge using a vortex-based cavitation device with the same inlet and outlet throat diameters (12 mm) [19] are same. A progressive cavity pump was used following the process flow reported in our earlier study [18]. Fig.…”

“…Vortex based HC pretreatment is used instead of other conventional pretreatment methods like thermal/thermochemical. It is energy efficient and scalable pretreatment method for sludge treatment and enhance the biomethane yields [18]. In comparison to other cavitation devices, such as orifices, venturis, or rotor-stators, vortex-based hydrodynamic cavitation devices demonstrate significantly less erosion and an earlier inception of cavitation.…”

The Use of Hydrodynamic Cavitation to Improve the Anaerobic Digestion of Waste from Dairy Cattle Farming—From Laboratory Tests to Large-Scale Agricultural Biogas Plants

“…Recently, attention has been paid to the possibility of building and using HC generators to intensify biological processes, including the treatment of toxic [41] and biodegradable [42] wastewater, the stabilisation of sewage sludge [43], including granulated sludge [44], or to increase the efficiency of bioenergy technologies, including methane [45] or hydrogen fermentation [46] as well as the production of bioethanol [47] and biodiesel [48]. The results of the experimental work carried out so far indicate efficient destruction of complex organic structures present in the pretreated medium, which increases the efficiency of their further conversion, transformation and biodegradation by specialised groups of microorganisms [49]. The undeniable advantages of HC include the absence of secondary contamination of the treated medium due to the non-chemical nature of HC [40], as well as easy implementation into existing technological systems [50] and relatively simple construction and operation [51].…”