Modeling a Two-Stage Trickling Filter Wastewater Treatment Plant to Simulate the Fate of Dissolved Organic Nitrogen and Its Biodegradability

摘要

The biodegradability of effluent dissolved organic nitrogen (DON) is important becausebiodegradable DON (BDON) can support algal growth and/or consume dissolved oxygen as it isfurther degraded. Removal of BDON through biological treatment processes can contribute toeffluent DON reduction. The fate of DON and BDON through a wastewater treatment plant witha two-stage trickling filter treatment plant was modeled. The BioWin v3.1 model wassuccessfully applied to simulate NH_3, NO_2, NO_3, total dissolved nitrogen, DON and BDONconcentrations through a two-stage trickling filter plant. Maximum growth rates (μ_(max)) forammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB), and AOB halfsaturation constant influenced ammonia and nitrate output results. Hydrolysis andammonification rates influenced all of the nitrogen species in the model output, including BDON.