“OPTIMIZATION PROCESS OF TEMPERATURE AND SODIUM BISULPHITE (NAHSO3) CONCENTRATION ON THE PRODUCTION OF SODIUM LIGNOSUPHONATE BASED ON PALM EMPTY FRUIT BUNCH(EFB)”. 2012. Jurnal Teknologi Industri Pertanian 18 (2). https://journal.ipb.ac.id/jurnaltin/article/view/4758.