Karakterisasi Pelet Pupuk Organik Berbahan Slurry Limbah Cair Pabrik Kelapa Sawit Sebagai Pupuk Slow Release

Abstract

The high availability of slurry from palm oil mill effluent, solid, and boiler ash with their nutrient contents make those three materials are potential to be processed become organic fertilizer in the form of pellet so it tends to has slow release characteristic. This research aims to analyize characteristic of organic fertilizer pellet from slurry of palm oil mill effluent as slow release fertilizer by analyzing its physical characteristics, NPK content, and NPK releasing rate in soil.Slurry was processed become solid fertilizer in the form of pellet using pellet mill with tapioca adhesive 5%. Pellet was made from slurry, solid, and boiler ash which were mixed with ratio 1:1:1, 1:2:2, 2:1:1, 2:2:1, 2:1:2, 1:0:0 (only slurry). This research ware analysis of physical characteristis (length, diameter, and density) and analysis of NPK content. N content was analyzed using Kjeldahl method, P content using spectrophotometer, and K content using Atomic Absorbtion Spectrophotometer (AAS). Then it was continued with analysis of NPK releasing content in latosol soil.The average length of pellets was 31–48 mm, diameter was 5,42 – 6,28 mm, water content was 0,426 – 0,976%, particle density was 1,04 – 1,34 g/cm3, and bulk density 0,49–0,63 g/cm3. Organic fertilizer pellet in six formulas contained N+P2O5+K2O about 5,93–8,08%. The highest content (8,08%) was produced from 1:0:0 pellet, followed by 2:1:2 formula (7,53%), and 1:2:2 formula (7,25%). Until the 10th days, the releasing of N element was about 1,99 – 3,18%, P element was 0,063– 0,075%, and K element was 43,54 – 62,26%.

Testing Various Doses of Liquid Organic Fertilizer (LOF) on te Growth of Scallion (Allium fistulosum L.)

“…According to Rahmi et al (2017), optimum and balanced availability of nutrients greatly affects plant growth. Meanwhile, Widyowanti et al (2019) stated that the growth and development of crop yields is determined by several factors, namely the type, dosage and application of liquid organic fertilizer.…”

Minimize Oil Losses in Palm Oil Mill through Optimalization of Sludge Separator Performance

“…The light phase, which was successfully catching, was sent to the continuous settling tank (CST) for precipitation or separation process between oil and sludge. Sludge that comes out of the sludge separator is then sent to the fat pit for liquid waste treatment (Anyaoha et al, 2018;Dharmawati et al, 2017;Widyowanti et al, 2019).…”