การศึกษาประสิทธิภาพการบำบัดน้ำเสียด้วยตะกอนจุลินทรีย์ ในระบบเอสบีอาร์

Abstract

This research aimed to study the efficiency of microbial sludge in treating wastewater that contains high amount of ammonia nitrogen using a Sequencing Batch Reactor (SBR) system. The experiment involved adding 200 liters of wastewater to the SBR reaction tank for three times, without stopping aeration for over 72 hours. The initial ammonia nitrogen concentrations for each cycle were 141 mg/L, 132 mg/L, and 145 mg/L, respectively. The results showed that the maximum treatment efficiency of microbial sludge in each experimental cycle was 82.6%, 83.9%, and 84.3%, respectively. The data from Linear equation showed a relationship between treatment time and the decrease in ammonia nitrogen concentration (R2=0.902, R2=0.7427, R2=0.7326). Furthermore, It was found that the treatment period of 72 hours was the period with an average treatment efficiency of 79.2%. Factors affecting microbial efficiency were controlled, including having the dissolved oxygen (DO) levels maintained between 2-4 mg/L, pH between 6.5-7.5, and temperature between 25.4-27.6°C. These results demonstrated the potential of microbial sludge in SBR systems to effectively treat wastewater with high amount of ammonia nitrogen concentrations. This research can be applied as a guideline for developing wastewater treatment processes in the future to enhancing sustainable wastewater management systems and reducing environmental impacts.