PENINGKATAN EFEKTIVITAS PENGOLAHAN AIR LIMBAH PROSES PEMUTIHAN PULP DENGAN REAKTOR UP-FLOW ANAEROBIC SLUDGE BLANKET (UASB) DAN LUMPUR AKTIF TERMOBILISASI (INCREASING THE EFFECTIVITY PULP BLEACHING PROCESS EFFLUENT TREATMENT BY UP-FLOW ANAEROBIC SLUDGE BLANKET (UASB) AND MOBILIZED ACTIVATED SLUDGE REACTORS) - Setiawan, Yusup (Center for Pulp and Paper, 2017)