Abstract:
This research is focus on anaerobic ammonia nitrogen treatment efficiency and physical characteristic of microbial sludge beads by using a model of anaerobic sequencing batch reactor (ASBR) with 24 liters working volume, 20,000 mg/l ML VSS and 50 rounds/min stirring. At organic loading rate of 0.027, 0.039 and 0.053 gNH[subscript 4]-N/m[superscript 3]-d, more than 50% ammonia nitrogen was removed. The highest ammonia nitrogen removal of 70% was obtained at 0.053 gNH[subscript 4]-N/m[superscript 3]-d organic loading rate. More than 99% nitrite was treated at every tested condition. The chemical oxygen demand removal were better than 80%. Microbial sludge granules, after wastewater treatment, turned darker and denser. The ratio of MLVSS to MLSS of the granules was 0.86.