Pengolahan Limbah Sludge dan Abu Ketel Industri Kertas dengan Metode Aerated Static sebagai Pembenah Tanah Organik

Abstract

PT Tanjungenim Lestari Pulp and Paper merupakan salah satu perusahaan yang bergerak di bidang industri kertas dan sudah memperluas ranah ekonominya hingga pasaran global. Penelitian ini dilakukan untuk mengidentifikasi proses pengomposan lumpur dan abu ketel dengan metode aerasi statis dan menganalisis karakteristik kompos yang dihasilkan berdasarkan SNI 7847:2012. Proses pengomposan dilakukan selama 40 hari dengan dua perlakuan yakni kontrol (KD) dan penambahan EM4 (D). Parameter yang dianalisis yaitu suhu, pH, kadar air, kadar abu, kadar C, kadar N, kadar nitrat, dan nilai C/N rasio. Pengomposan dilakukan dalam reaktor bervolume 60 liter yang dilengkapi pipa aerasi untuk mendistribusikan udara dengan laju aerasi sebesar 0,4 L/menit.kg bahan menggunakan blower. Hasil kompos secara umum telah memenuhi syarat SNI 7847:2012, khususnya untuk C/N rasio perlakuan KD 16,94 dan 17,00 untuk perlakuan D, meskipun kadar air kedua perlakuan masih melebihi batas maksimum. Perbandingan harga pokok produksi menyatakan bahwa biaya produksi perlakuan KD lebih murah dibanding perlakuan D dengan harga selisih harga Rp 3.060.

PT Tanjungenim Lestari Pulp and Paper is one of the leading companies engaged in the paper industry and has expanded its economic to the global market. This research was conducted to identify the composting process of sludge and fly ash by aerated static method and analyze the characteristics of compost produced based on SNI 7847:2012. The process was carried out for 40 days with two treatments, control treatment (KD) and addition of EM4 treatment (D). The parameters analyzed were temperature, pH, moistur content, ash content, C content, N content, nitrate content, and the C/N ratio. The composting process was carried out in a 60-liter reactor equipped with an aeration pipe to distribute air with an aeration rate of 0.4 L/min.kg of material using a blower. The general result of the compost products have met the requirements of SNI 7847:2012, especially for the C/N ratio of KD treatment with the value 16.94 and 17.00 for D treatment, although the moisture content of both treatments still exceeds the maximum limit. A comparison of the cost of production shows that the production cost of the KD treatment is cheaper than the D treatment with a price difference of Rp 3,060.