Park, C. Hermanowicz, S. W. Jolis, D. 2024-01-20T12:05:18Z 2024-01-20T12:05:18Z 2021-09-01 2013-06 0273-1223 https://pubs.kist.re.kr/handle/201004/128037 Foaming in anaerobic digesters has severe impacts on process efficiency and operational costs. In this study, we present an experimental method to determine foam behaviour and stability for various foaming solutions. This novel technique measured foam conductivity at different heights along a foam column allowing changes in foam composition to be monitored in time. We analysed foam stability which is primarily dependent on the foam drainage velocity, a quantity that can be determined from forced drainage experiments. The drainage velocity increased in the presence of anaerobic digester sludge, compared to simple surfactant foam. We proposed a new understanding of the effect of sludge particles on the foam stability. Both physical properties ( foam physical constant, beta) of foam and bubble surface interactions by applying stable and unstable foam in addition of surfactants are also evaluated and discussed. English IWA PUBLISHING THROUGH AQUEOUS FOAMS ELECTRICAL-CONDUCTIVITY DRAINAGE SURFACTANTS NOCARDIA A novel technique for evaluating foam dynamics in anaerobic digesters Article 10.2166/wst.2013.160 1 WATER SCIENCE AND TECHNOLOGY, v.67, no.11, pp.2595 - 2601 WATER SCIENCE AND TECHNOLOGY 67 11 2595 2601 scie scopus 000320248500028 2-s2.0-84878941682 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article THROUGH AQUEOUS FOAMS ELECTRICAL-CONDUCTIVITY DRAINAGE SURFACTANTS NOCARDIA anaerobic sludge conductivity drainage foam stability