Syamsudin Syamsudin(1*), Sri Purwati(2), Aep Surachman(3), Reza Bastari Imran Wattimena(4)
(1) Balai Besar Pulp dan Kertas
(2) Balai Besar Pulp dan Kertas
(3) Balai Besar Pulp dan Kertas
(4) Balai Besar Pulp dan Kertas
(*) Corresponding Author
DOI: http://dx.doi.org/10.25269/jsel.v6i02.90


Wastewater treatment sludge cake and pulp reject from kraft pulp mill are sources of renewable energy. This study evaluated the effects of temperature on pyrolysis to convert sludge cake and pulp reject into tar and char product. Sludge cake had composition of (adb): moisture 9.08%, volatile matter 57.53%, fixed carbon 8.72% and ash 24.67% with calorific value of 2931 cal/g, while pulp reject had moisture 9.42%, volatile matter 68.16%, fixed carbon 17.00% and ash 5.42% with calorific value of 3656 cal/g. Higher volatile matter content made sludge cake and pulp reject had potency to produce tar. Pyrolysis peak was reached at 349oC for sludge cake and 300oC for pulp reject. The conversion reached 30% at 300oC and 80-90% at 400oC, with the yield of tar reached 39% for sludge cake and 47% for pulp reject. At >400oC tar formed decomposed into pyrolysis gas. Differences in material composition and pyrolysis temperature influenced composition of the tar. The char yields at 300-500oC were not difference signifantly, either for sludge cake or pulp reject. All components of the volatile matter in sludge cake and pulp reject were degraded completely in 60 minutes.




Penelitian pirolisis sludge cake dan pulp reject dari pabrik pulp kraft dengan variasi suhu reaktor telah dilakukan. Sludge cake dan pulp reject adalah biomassa sisa yang dihasilkan di pabrik pulp dalam jumlah besar. Sludge cake hasil pengolahan air limbah dan pulp reject proses pembuatan pulp kimia merupakan sumber energi alternatif terbarukan potensial yang terdapat di industri pulp kraft yang saat ini belum banyak dimanfaatkan dengan baik sehingga menyebabkan isu-isu lingkungan. Penelitian ini melakukan evaluasi pengaruh suhu terhadap pirolisis untuk mengkonversi sludge cake dan pulp reject menjadi produk tar dan arang. Sludge cake mengandung zat terbang 51,34% (adb) dan karbon tetap 10,40% (adb) dengan nilai kalor 2915 kal/g (adb), sedangkan pulp reject mengandung zat terbang 68,16% (adb) dan karbon tetap 17,00% (adb) dengan nilai kalor 3656 kal/g (adb). Sebagian besar komponen zat terbang pada sludge cake maupun pulp reject habis terdegradasi pada suhu 300 – 500oC dengan waktu tinggal 60 menit. Tar hasil pirolisis sludge cake dan pulp reject mengandung senyawa-senyawa turunan benzen, phenol, polycyclic aromatic hydrocarbons (PAHs), asam dan ester. Pada rentang suhu 400 – 500oC tar yang terbentuk oleh reaksi pirolisis primer terdekomposisi lebih lanjut menjadi gas oleh reaksi pirolisis sekunder sehingga menurunkan perolehan tar.

Kata kunci: sludge cake, pulp reject, pirolisis, arang, zat terbang


sludge cake; pulp reject; pyrolysis; char; volatile matter

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Akhtar, J. and Saidina Amin, N. (2012) ‘A review on operating parameters for optimum liquid oil yield in biomass pyrolysis’, Renewable and Sustainable Energy Reviews, pp. 5101–5109.

Demiral, I. and Ayan, E. A. (2011) ‘Pyrolysis of grape bagasse: Effect of pyrolysis conditions on the product yields and characterization of the liquid product’, Bioresource Technology, 102(4), pp. 3946–3951.

Devi, P. and Saroha, A. K. (2013) ‘Effect of temperature on biochar properties during paper mill sludge pyrolysis’, International Journal of ChemTech Research, 5(2), pp. 682–687.

Faubert, P., Barnabé, S., Bouchard, S., Côté, R. and Villeneuve, C. (2016) ‘Pulp and paper mill sludge management practices: What are the challenges to assess the impacts on greenhouse gas emissions?’, Resources, Conservation and Recycling, pp. 107–133.

Fu, P., Hu, S., Sun, L., Xiang, J., Yang, T., Zhang, A. and Zhang, J. (2009) ‘Structural evolution of maize stalk/char particles during pyrolysis’, Bioresource Technology, 100(20), pp. 4877–4883.

Gavrilescu, D. (2008) ‘Energy from biomass in pulp and paper mills’, Environmental Engineering and Management Journal, pp. 537–546.

Heo, H. S., Park, H. J., Dong, J. I., Park, S. H., Kim, S., Suh, D. J., Suh, Y. W., Kim, S. S. and Park, Y. K. (2010) ‘Fast pyrolysis of rice husk under different reaction conditions’, Journal of Industrial and Engineering Chemistry, 16(1), pp. 27–31.

Kuroda, K. ichi and Nakagawa-izumi, A. (2006) ‘Analytical pyrolysis of lignin: Products stemming from β-5 substructures’, Organic Geochemistry, 37(6), pp. 665–673.

Lede, J., Broust, F., Ndiaye, F. T. and Ferrer, M. (2007) ‘Properties of bio-oils produced by biomass fast pyrolysis in a cyclone reactor’, Fuel, 86(12–13), pp. 1800–1810.

Lou, R., Wu, S., Lv, G. and Yang, Q. (2012) ‘Energy and resource utilization of deinking sludge pyrolysis’, Applied Energy, 90(1), pp. 46–50.

Namazi, A. B., Allen, D. G. and Jia, C. Q. (2015) ‘Microwave-assisted pyrolysis and activation ofpulp mill sludge’, Biomass and Bioenergy, 73, pp. 217–224.

Piskorz, J., Majerski, P., Radlein, D., Vladars-Usas, A. and Scott, D. S. (2000) ‘Flash pyrolysis of cellulose for production of anhydro-oligomers’, Journal of Analytical and Applied Pyrolysis, 56(2), pp. 145–166.

Pokorna, E., Postelmans, N., Jenicek, P., Schreurs, S., Carleer, R. and Yperman, J. (2009) ‘Study of bio-oils and solids from flash pyrolysis of sewage sludges’, Fuel, 88(8), pp. 1344–1350.

Sánchez, C. (2009) ‘Lignocellulosic residues: Biodegradation and bioconversion by fungi’, Biotechnology Advances, pp. 185–194.

Scott, G. M. (1995) ‘Sludge Caracteristics and Disposal Alternatives for the Pulp and Paper Industry’, International Environmental Conference, pp. 269–279.

Strezov, V. and Evans, T. J. (2009) ‘Thermal processing of paper sludge and characterisation of its pyrolysis products’, Waste Management, 29(5), pp. 1644–1648.

Sun, R. C., Sun, X. F. and Ma, X. H. (2002) ‘Effect of ultrasound on the structural and physiochemical properties of organosolv soluble hemicelluloses from wheat straw’, Ultrasonics Sonochemistry, 9(2), pp. 95–101.

Thangalazhy-Gopakumar, S., Adhikari, S., Ravindran, H., Gupta, R. B., Fasina, O., Tu, M. and Fernando, S. D. (2010) ‘Physiochemical properties of bio-oil produced at various temperatures from pine wood using an auger reactor’, Bioresource Technology, 101(21), pp. 8389–8395.

Yang, H., Yan, R., Chen, H., Lee, D. H. and Zheng, C. (2007) ‘Characteristics of hemicellulose, cellulose and lignin pyrolysis’, Fuel, 86(12–13), pp. 1781–1788.

Zhang, H., Xiao, R., Huang, H. and Xiao, G. (2009) ‘Comparison of non-catalytic and catalytic fast pyrolysis of corncob in a fluidized bed reactor’, Bioresource Technology, 100(3), pp. 1428–1434.

http://www.indomigas.com. Cadangan Produksi Gas Bumi Indonesia Mencapai 59 Tahun (diakses tanggal 10 Agustus 2016).

http://prokum.esdm.go.id. Peraturan Pemerintah Republik Indonesia Nomor 79 Tahun 2014 tentang Kebijakan Energi Nasional (diakses tanggal 5 September 2016).

http://www.sekretariat-rangrk.org. Peraturan Presiden Republik Indonesia Nomor 61 Tahun 2011 tentang Rencana Aksi Nasional Penurunan Emisi Gas Rumah Kaca (diakses tanggal 25 Agustus 2016).

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