Quantification of organic and nitrogen removal in downflow hanging sponge (DHS) systems as a post-treatment of UASB effluent

摘要

The aim of this research was to investigate the nature and composition of organicnsubstrate in two down-flow hanging sponge (DHS) systems using mixed fungal (FDHS)nand bacterial (BDHS) cultures treatment for UASB effluent of tapioca starch wastewater,nevaluated by COD fractionations and two material balances. The random type DHS reactorsnwere operated as modular columns consisting of four identical segments connected vertically.nResults of the wastewater characterization showed that carbonaceous fractions were variednon a function of DHS height. Two balances applied to experimental data were for chemicalnoxygen demand (COD) and nitrogen (N). Results of mass balance calculations can alsonbe used to examine the process behavior of two DHS systems to improve the organicnand nitrogen removal mechanisms.