Direct reuse at industrial level of ion-exchange resin regeneration wastewater in MDF manufacturing
| Autor: | Meisam Valizadeh Kiamahalleh, Antonio Pizzi, Mohammad Valizadeh Kiamahalleh, Mohsen Khonakdar Dazmiri |
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| Přispěvatelé: | Chassbsaz Company, Sari, International Maritime College Oman, Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Université de Lorraine (UL) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
[CHIM.ORGA]Chemical Sciences/Organic chemistry 020209 energy Formaldehyde Mixing (process engineering) Forestry 02 engineering and technology Reuse Pulp and paper industry 01 natural sciences 6. Clean water 12. Responsible consumption Industrial wastewater treatment chemistry.chemical_compound Wastewater chemistry 13. Climate action Hazardous waste 010608 biotechnology 0202 electrical engineering electronic engineering information engineering Environmental science General Materials Science Turbidity Ion-exchange resin ComputingMilieux_MISCELLANEOUS |
| Zdroj: | European Journal of Wood and Wood Products European Journal of Wood and Wood Products, Springer Verlag, 2020, 78 (3), pp.523-531. ⟨10.1007/s00107-020-01513-0⟩ |
| ISSN: | 0018-3768 1436-736X |
| Popis: | Industrial wastewater is currently a big challenge for authorities due to its environmental issues when disposed to the ecosystem. From an economic perspective and long treatment time, it is yet more reasonable to recover and reuse wastewater in industries. In this work, the wastewater from an ion exchange resin regeneration process was directly and without any further treatment reused in the wood industry for manufacturing medium density fiberboards (MDF). Comparing with the disposal criteria of international standards, the reused wastewater exhibited much higher electrical conductivity, turbidity, total dissolved solid, total suspension solid, and inorganic salt content than the permissible limits; therefore, it is categorized as hazardous material. The highly saline wastewater was added during and after synthesizing of the urea–formaldehyde (UF) resin but before mixing with the wood fibers. The Fourier transform infrared spectroscopy and differential scanning calorimetry analyses of the UF resin samples, respectively, demonstrated the high stability of the chemical structure and higher strength against decomposition for the UF resins after being treated with the wastewater. The physico–mechanical properties of MDFs prepared by reused wastewater were significantly improved whilst the formaldehyde emission of the boards was noticeably reduced (~ 17%) to the benefit of the environment. |
| Databáze: | OpenAIRE |
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