Park, KY Lee, JW Ahn, KH Maeng, SK Hwang, JH Song, KG 2024-01-21T07:33:41Z 2024-01-21T07:33:41Z 2021-09-02 2004-03 1061-4303 https://pubs.kist.re.kr/handle/201004/137822 A pilot-scale facility integrated with an ozonation unit was built to investigate the feasibility of using ozone-disintegration byproducts of wasted biomass as a carbon source for denitrification. Ozonation of biomass resulted in mass reduction by mineralization as well as by ozone-disintegrated biosolids recycling. Approximately 50% of wasted solids were recovered as available organic matter (ozonolysate), which included nonsettleable microparticles and soluble fractions. Microparticles were observed in abundance at relatively low levels of ozone doses, while soluble fractions became dominant at higher levels, of ozone doses in ozone-disintegrated organics. Batch denitrification experiments showed that the ozonolysate could be used as a carbon source with a maximum denitrification rate of 3.66 mg nitrogen (N)/g volatile suspended solids (VSS).h. Ozonolysate was also proven to enhance total nitrogen removal efficiency in the pilot-scale treatment facility. An optimal chemical oxygen demand (COD)-to-nitrogen ratio for complete denitrification was estimated as 5.13 g COD/g N. The nitrogen-removal performance of the modified intermittently decanted extended aeration process dependent on an external carbon supply could be described as a function of solids retention time. English WATER ENVIRONMENT FEDERATION ACTIVATED-SLUDGE PROCESS SEWAGE-SLUDGE DENITRIFICATION ENHANCEMENT BIOSOLIDS OZONATION Ozone disintegration of excess biomass and application to nitrogen removal Article 10.2175/106143004X141690 1 WATER ENVIRONMENT RESEARCH, v.76, no.2, pp.162 - 167 WATER ENVIRONMENT RESEARCH 76 2 162 167 scie scopus 000221290800010 2-s2.0-3242756914 Engineering, Environmental Environmental Sciences Limnology Water Resources Engineering Environmental Sciences & Ecology Marine & Freshwater Biology Water Resources Article ACTIVATED-SLUDGE PROCESS SEWAGE-SLUDGE DENITRIFICATION ENHANCEMENT BIOSOLIDS OZONATION denitrification disintegration carbon source ozonation wasted biomass