Effect of humic acid on E. coli disinfection in a microbubble-gas plasma reactor
Alexander R.P. Wright
Bipin Uprety
Alexander H. Shaw
Gilbert Shama
Felipe Iza
Hemaka Bandulasena
2134/38091
https://repository.lboro.ac.uk/articles/journal_contribution/Effect_of_humic_acid_on_E_coli_disinfection_in_a_microbubble-gas_plasma_reactor/9240851
Final effluent from wastewater treatment plants may contain bacteria that can pose a range of environmental and health threats. A microbubble-gas plasma reactor capable of producing a number of both reactive oxygen species and reactive nitrogen species has been developed for inactivating bacteria in final effluents. At the optimum operating conditions, greater than 5-log reductions in E. coli viability was achieved in pure water after 30 min of operation with an energy consumption of 68 kJ/L. Addition of humic acid reduced the E. coli inactivation rate. At the highest concentration of humic acid tested (0.0015% w/w), E. coli inactivation was reduced by ˜50% compared to that achieved in pure water for a 30-minute treatment time. Longer treatment times may be required for waste streams having a high organic content, but the disinfection levels achieved with a low power consumption demonstrate the potential of this approach for industrial use.
2019-06-26 13:58:20
Microbubbles
Gas plasma
E. coli
Disinfection
Final wastewater effluents
Chemical Engineering not elsewhere classified