Optimazitation Of Nitrogen Removal in Activated Sludge Process Using Simultaneous Nitrification Denitrification Method
Junaidi (1*), Sri Sumiyati (2), M Arief Budihardjo (3), Wiharyanto Oktiawan (4), Ronauli Sitinjak (5)

Environmental Engineering Department of Engineering Faculty, Diponegoro University, Tembalang, Semarang, Indonesia, 50275
junaidiundip[at]gmail.com

Abstract

This research has investigated of high nitrogen concentrations by simultaneous nitrogen nitrification and denitrification (SND) in a continuous flow system of activated sludge processes. Merriote tube capacity of 10 L with a discharge of 10 L/day as an inlet. Next to the 10 L volume aeration tank where biological treatment occurs, pH 7,2 and DO 1-1.5 mg/L are the control variables. Artificial waste is used as an inlet with a nutrient ratio of C:N:P is 100:5:1. This research was conducted by variations in carbon sources is namely glucose and methanol and ariations of CN ratios of 5, 10, and 20 were also carried out. SND (Simultaneous Nitrification Denitrification) occured by nitrogen removal the highest percentage of N nitrification to nitrification when the source of carbon methanol and the ratio of CN 20 is 63.38 %. While the percentage of N denitirification is at the time of methanol and the CN ratio of 20 is 65.97 %. That proper SND technology can save operating time and energy, and may replace two traditional stages: biological nitrification and denitrification processes.

Keywords: artificial wastewater, nitrogen removal, activated sludge, simultaneous nitrification-denitrification

Topic: Environmental Science, Technology, and Education