Monitoring the Process of Anaerobic Digestion of Native and Microwave Pre-Treated Sludge by Dielectric and Rheological Measurements

The anaerobic digestion (AD) of wastewater sludge presents a promising and efficient method treatment, as it can lower the organic content while producing renewable source energy—biogas—at same time. However, using native, non-treated industrial substrate for AD may present difficulties, hence we focused our research primarily on applicability measuring techniques—viscosity dielectric measurement. One goals was to investigate presence any connection between aforementioned properties overall biogas production, in order prove whether these measurement techniques were capable monitoring process AD. Our other aim how microwave (MW) pre-treatment affected fermentation. results revealed that terms total yield, irradiation could enhance fermentation by 14%, also reduced viscosity media 13%. did not change tendencies regarding aspects. Moreover, discovered absolute measurements effective methods Additionally, correlation found accumulating constant loss factor, digested media—each share similarity tendency indicate occurrence different phases during batch