PENGEMBANGAN DAN KARAKTERISASI LUMPUR GRANULA AEROBIK DALAM SEQUENCING BATCH REACTOR TERMODIFIKASI UNTUK PENGOLAHAN AIR LIMBAH TEKSTIL: PENGARUH NUTRISI TAMBAHAN

• Main Author: Choerudin
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/33396
• Institution: Institut Teknologi Bandung

In this experiment, development of aerobic granular sludge (AGS) had been done. The experiment conducted in two type of reactors namely the conventional SBR 4.5 L (run 1) and the aerobic up-flow fluidized bed (AUFB) 7,5 L (run 2) and 9 L (run 3). The reactor consists of a column and an overhead clarifier. The operation conducted in 6 hours cycle with three sequential phase namely fill-and-discharge (15 minutes, anaerobic), reaction (40 minutes anaerobic + 130 minutes aerobic, two times), and settling (5 minutes). The inoculum for starting up the process consists of anaerobic and aerobic sludge. The textile wastewater was added by well-defined chemicals (run 1 and 2, COD:N:P ratio of 100:5:18) or by fertilizer (run 3, COD:N:P ratio of 100:5:1). AGS has been characterized through some parameters including its performance on COD removal and decolourisation. The granular sludge had been developed within two weeks. AGS in run 2 more spherical than in run 3. The sludge had SVI value smaller than 76.1 mL/g (indicating good sludge properties). Granular sludge from both runs had settling velocity more than 11 m/h (floccular sludge below than 6.65 m/h). Settling velocity of granule in run 2 was slightly better than run 3. Specific gravity of granules in run 2 was 1039 kg/m3 which was slightly denser than in run 3. COD removal of both run reached up to 85%. But, run 3 had better decolourisation performance than run 2. It can be concluded that fertilizer addition as the N and P source is comparable to well-defined chemicals addition in the development of granular sludge.