Assessment of a hybrid technology for liquid fuel dimethyl aminoethyl azide wastewater treatment

Abstract Dimethyl aminoethyl azide (DMAZ) is a liquid fuel in the space industry. Although this non-carcinogenic, its wastewater suffers from some hazardous pollutants, such as sodium (NaN3). A hybrid process of coagulation–flocculation and chemical reaction with nitrous acid was applied for treatment. The Taguchi method used optimization. Coagulant concentration, rapid mixing intensity, duration time, CAMP number settlement time were found to be effective parameters efficiency former process. Turbidity total suspended solids (TSS) track removal first stage. complete achieved. In latter process, NaN3 removed using acid. pH optimized controlling factor second Biochemical oxygen demand (BOD), (COD) removals 98.9, 98.2 96.3% obtained under optimum conditions, respectively. As result, reduction 91.9% turbidity, 98.5% TSS, BOD, 98.1% COD 96.7% concentration observed output wastewater.