Pelet Reject Industri Kertas Sebagai Bahan Bakar Boiler

Abstract

Paper mill using recycle fiber as raw material produces reject containing fiber and plastic. The reject was identified by means of sorting. Reject pellet was prepared by drying, followed by shredding, and pellets molding. It was analyzed for its proximate composition (moisture, ash, volatile matter and fixed carbon). Calorific value, sulfur content, ash mineral content, and ash fusion temperatures were also tested. The results showed that reject consists of 50.75% fiber and 49.25% plastic of which is > 99% High Density Polyethylene (HDPE). Reject contains a high calorific value of about 7000 cal/g which could potentially be used as fuel. Coal boiler fuel containing 5-50% reject pellet shows no indication of slagging and fouling in the boiler. ABSTRAKIndustri kertas berbahan baku kertas bekas menghasilkan reject yang mengandung serat dan plastik. Reject diidentifikasi komponennya dengan cara pemilahan. Proses pembuatan pelet dari reject industri kertas terdiri dari proses pengeringan, pencacahan, dan pencetakan pelet. Pelet reject dianalisis proksimat (kadar air lembap, kadar abu, kadar zat terbang (volatile matter) dan karbon padat (fixed carbon). Nilai kalor, kadar sulfur, kadar mineral abu, dan suhu fusi abu (Ash Fusion Temperature) pelet reject juga diuji. Hasil menunjukkan bahwa komponen reject terdiri dari serat 50,75% dan plastik 49,25% dengan kandungan plastik jenis High Density Polyethylene (HDPE) lebih dari 99%. Nilai kalor pelet reject sekitar 7.000 kalori/gram. Hal ini menunjukkan potensi pelet reject sebagai bahan bakar campuran batubara. Penambahan pelet reject sebanyak 5 -50% ke dalam batubara dapat digunakan sebagai bahan bakar boiler tanpa menyebabkan indikasi terjadinya slagging dan fouling di dalam boiler.Kata kunci: reject, pelet, batubara, nilai kalor, bahan bakar

Plastic Waste Management to Support The Circular Economy in The Pulp and Paper Industry

“…Solid/Reject waste component comprises fiber (paper fragments) up to 50.75% and plastic up to 49.25% (HDPE plastic-type > 99%) regarding the metal extracted from a small quantity of wire (Setiawan et al, 2014). The rising energy price in 2022 affected the cost of production or waste management using energy.…”

Potency to Recycle Hydrapulper Reject Waste of Paper Mill Into Composite Particleboard

“…Plastics content on HR is usually relatively high. A study reported about 45% plastic content on HR without prior separation (Haynes, Malloch, Cuddy, & Nicodimos, 2009), while the contents were slightly higher (49,25%) after a metal separation treatment from HR (Setiawan, Purwati, Surachman, Bastari, & Hardiani, 2014). There are several types of plastic wastes that have thermoplastic characteristics and can be formed repeatedly with high temperature such as Polyethylene (PE) (Atuanya, Ibhadode, & Igboanugo, 2011;Faruk & Matuana, 2008;Li, Zheng, Pan, & Hartsough, 2009), Polypropylene (PP) (Ashori & Nourbakhsh, 2014;Septiari, Karyasa, & Kartowarsono, 2014), and Polystyrene (PS) (Mawardi, 2009).…”

“…The proportion of plastic in HR can be seen in Table 1. (Haynes et al, 2009) With metal separation (Setiawan et al, 2014) Fiber (paper, cardboard, etc. ) 21 Plastic waste is very difficult and will likely to take a long period of time to decompose in the natural environment.…”