Application of natural biodegradable fiber as biofilm medium and carbon source in DEnitrifying AMmonium OXidation (DEAMOX) process for nitrogen removal from wastewater

Abstract Nitrite (NO2?) accumulation and retaining of anammox bacteria are two decisive factors for stable operation partial denitrification coupled with the process. Denitrifying ammonium oxidation (DEAMOX) process has been regarded as a promising method nitrogen removal from wastewater containing both (NH4+) nitrate (NO3?) pollutants simultaneously. However, performance efficiency DEAMOX in biofilm reactors still not fully understood. This study successfully implements biodegradable Luffa Cylindrica fiber carbon source carrier system. 87% nitrate-to-nitrite transformation was achieved through An average total (TN) ~98% obtained influent NH4+-N NO3?-N concentration 100 mg L?1 an up-flow packed bed reactor. The Field Emission-Scanning Electron Microscopy (FE-SEM) analysis indicated that proposed conditions, reactor favor granulation developed on L. cylindrica. results imply solid phase were using cylindrica carrier, respectively. Complete NO3? observed this supports hypothesis can support produced