بررسی کیفیت و میزان آلودگی پساب حاصل از فرایند بازیافت ضایعات ام دی اف
محورهای موضوعی : منابع طبیعی
بیتا معزی پور
1
(استادیار گروه مهندسی منابع طبیعی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران. * (مسوول مکاتبات))
محمد احمدی
2
(دانشیار گروه مهندسی منابع طبیعی، دانشکده کشاورزی و منابع طبیعی، دانشگاه محقق اردبیلی، اردبیل، ایران .)
آیدا معزی پور
3
(دانش‌آموخته دکتری گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران ، کرج، ایران.)
علی علی عبدالخانی
4
(دانشیار گروه علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران.)
کلید واژه: کیفیت پساب, ضایعات ام دی اف, بازیافت, حرارت دهی اهمیک, هیدروترمال,
چکیده مقاله :
زمینه و هدف: صنایع سلولزی از جمله صنایع مهم و اثرگذار در کشورهای توسعه یافته و در حال توسعه محسوب می شود. یکی از فعالیت هایی که به تازگی در این صنعت مورد توجه قرار گرفته، بازیافت ضایعات می باشد. با وجود مزایای بسیار زیاد بازیافت از نظر اقتصادی و زیست محیطی، این فرایند منجر به تولید پساب می شود که بررسی آلایندگی آن از اهمیت زیادی برخوردار است. روش بررسی: در این تحقیق، کیفیت و میزان آلودگی پساب حاصل از بازیافت ضایعات ام دی اف مورد بررسی قرار گرفت. به منظور بازیافت ضایعات ام دی اف از دو روش مختلف هیدروترمال و حرارت دهی اهمیک استفاده شد. روش هیدروترمال در دمای 105 درجه و به مدت 150 دقیقه انجام شد و روش حرارت دهی اهمیک در دمای 100 درجه سانتی گراد و در دو زمان (2 و4 دقیقه) انجام شد. مواد شیمیایی تشکیل دهنده پساب حاصل از بازیافت ضایعات ام دی اف از طریق آزمون کروموتوگرافی و طیف سنجی جرمی(GC/MS) مورد بررسی قرار گرفت. هم چنین pH، BOD، COD، TDS و TSS هر سه نوع پساب بدست آمده اندازه گیری شدند. یافته ها: نتایج نشان داد که ترکیبات نیتروژن دار بیش ترین مواد موجود در پساب روش هیدروترمال بودند و در پساب حاصل از روش اهمیک در هر دو زمان 2 و 4 دقیقه بیش ترین مواد موجود را اسیدها تشکیل می دادند. بحث و نتیجه گیری: پساب های حاصل دارای ترکیبات فنول کلرینه شده و تانن ها و مشتقات لیگنین بودند و مقدار BOD، COD و ترکیبات معلق در آن ها بیش تر از حد استاندرد بود. به منظور کاهش ذرات معلق می توان از فیلتراسیون استفاده کرد.
Background and Objectives: The cellulose industry is one of the most important and influential industries in developed and developing countries. Waste recycling is one of the activities that have recently been considered in this industry. Despite the enormous economic and environmental benefits of recycling, this process results in the generation of effluent which is important for the study of its pollution. Method: For recycling of MDF wastes two different method including hydrothermal and ohmic heating were utilized. Hydrothermal method was done at 105˚C for 150 min and ohmic heating method was carried at 100 ˚C for 2 different time duration (2 and 4 min).The chemicals contained in waste waters obtained from recycling of MDF wastes were determined using of chromatography and mass spectroscopy (GC/MS) test. Additionally, pH value, BOD, COD, TDS and TSS for all kinds of waste waters were measured. Finding: The results showed that the nitrogenous compounds had the most concentration in waste water obtained from hydrothermal method, and in the wastewater produced by ohmic method, both the 2 and 4 mins. Discussion and Conclusion: The most active materials were the acids. The obtained waste waters included chloride phenol compounds, tannins and lignin derivatives and their BOD, COD and suspended compounds were higher than the requirements defined in standard. Filtration method can be used for decreasing the amount of suspended solids.
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- Athanassiadou, E., Roffael, E.,Manthanis, G., 2005. Medium Density Fibreboards (MDF) from Recycled Fibres, www.Academia.edu, 9pp.
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- Michanickl, A., Boehme, C., 2003. Method for recovering chips and fibers of bonded wood materials involves passing of steam through a vessel with such materials which have been soaked with a heated impregnation solution, Patent No. DE10144793, WO03026859.
- Manthanis, G., Athanassiadou, E., Nakos, P., Coutinho, A., 2004. A new recycling process for waste panels, in: Proc. of European COST E31 Conference: “Management of recovered wood”. Ed. C. Gallis, Thessaloniki, Greece, pp. 204-210.
- Lykidis, C.H., Grigoriou, A., 2008. Hydrothermal recycling of waste and performance of recycled wooden particleboard, Waste management Journal, Vol 28, pp. 57-63.
- Roffael, E., Dix, B., Schneider, T., 2001. Thermomechanical (TMP) and chemothermomechanical pulps (CTMP) for medium density fibreboards (MDF), Holzforschung, Vol 55, pp. 214-218.
- Nicewics, D., Leszek, D., 2010. Recycling of insulation boards by reuse” Annals of Warsaw University of Life Sciences – SGGW. Forestry and Wood Technology Journal, Vol 72, pp. 57-61.
- Bartlett, C., New, J., 2012. Recycling MDF: are we there yet?” Panel perspectives, www.wbpionline.com, 5 pp.
- Kakavandi, B., Joneidi, A., Ghasemi, A., Gholizadeh, A., 2012. Studying Effluent Quality of Wastewater Treatment Plant. Scientific research journal of Health System Research (HSR), Vol. 8 (4), pp.706-713. (In Persian)
- Chen, S.H., Li, S., Mu, J., Feng, Y., 2015. Influence of urea formaldehyde resin on the pyrolysis characteristics and gas evolution of waste MDF. Wood Research Journal, Vol. 60 (1), pp. 113-124.
- Vaziri, V., Ariayi-Monfared, M., Rezayati, P., Jaafari-Petroudi, S.R., Introducing different methods for treatment of cellulosic industries effluent, The first conference of natural resources management, March 2014, Gonbade Kavous, Iran. (In Persian)
- Hamzeh, Y., 2014. Management of water and effluent in pulp and paper industries. Iranian Student Book Agency. (In Persian)
- H, Holik., 2006. Handbook of paper and board, John Whily & Sons
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- Kargarfard, A., Hoseinzadeh, A., Nourbakhsh, A., Khajeh, K.H., Hajihasani, R., 2005. Investigation on medium density fiberboard (MDF) properties produced from poplar wood (P.nigra). Pajhouhesh and Sazandegi, No.68, pp. 38-48. (In Persian)
- Athanassiadou, E., Roffael, E.,Manthanis, G., 2005. Medium Density Fibreboards (MDF) from Recycled Fibres, www.Academia.edu, 9pp.
- Rohdes, G.T.A., Gehrts, E., 1995. MDF - A new member of the family of woodbased panels. Tappi Proceedings. Europan plastic laminates forum, Vol.4 (1), pp. 9-15.
- Habibi, M.R., Mahdavi, S., Hoseinkhani, H., Sepidehdam, M.J., 2006. Invesitgation on possibility of MDF production from reed. Iranian Journal of Wood and Paper Science Research, Vol.19, (2), pp. 242-225. (In Persian)
- Dix, B., Schafer, M., Roffael, E., 2001. Using fibers from waste fiberboards pulped by a thermo-chemical process to produce medium density fiberboard (MDF). Holz als Roh und Werkstoff, Vol 59(4), pp. 276-276.
- Michanickl, A., Boehme, C., 2003. Method for recovering chips and fibers of bonded wood materials involves passing of steam through a vessel with such materials which have been soaked with a heated impregnation solution, Patent No. DE10144793, WO03026859.
- Manthanis, G., Athanassiadou, E., Nakos, P., Coutinho, A., 2004. A new recycling process for waste panels, in: Proc. of European COST E31 Conference: “Management of recovered wood”. Ed. C. Gallis, Thessaloniki, Greece, pp. 204-210.
- Lykidis, C.H., Grigoriou, A., 2008. Hydrothermal recycling of waste and performance of recycled wooden particleboard, Waste management Journal, Vol 28, pp. 57-63.
- Roffael, E., Dix, B., Schneider, T., 2001. Thermomechanical (TMP) and chemothermomechanical pulps (CTMP) for medium density fibreboards (MDF), Holzforschung, Vol 55, pp. 214-218.
- Nicewics, D., Leszek, D., 2010. Recycling of insulation boards by reuse” Annals of Warsaw University of Life Sciences – SGGW. Forestry and Wood Technology Journal, Vol 72, pp. 57-61.
- Bartlett, C., New, J., 2012. Recycling MDF: are we there yet?” Panel perspectives, www.wbpionline.com, 5 pp.
- Kakavandi, B., Joneidi, A., Ghasemi, A., Gholizadeh, A., 2012. Studying Effluent Quality of Wastewater Treatment Plant. Scientific research journal of Health System Research (HSR), Vol. 8 (4), pp.706-713. (In Persian)
- Chen, S.H., Li, S., Mu, J., Feng, Y., 2015. Influence of urea formaldehyde resin on the pyrolysis characteristics and gas evolution of waste MDF. Wood Research Journal, Vol. 60 (1), pp. 113-124.
- Vaziri, V., Ariayi-Monfared, M., Rezayati, P., Jaafari-Petroudi, S.R., Introducing different methods for treatment of cellulosic industries effluent, The first conference of natural resources management, March 2014, Gonbade Kavous, Iran. (In Persian)
- Hamzeh, Y., 2014. Management of water and effluent in pulp and paper industries. Iranian Student Book Agency. (In Persian)
- H, Holik., 2006. Handbook of paper and board, John Whily & Sons