راه‌کاری پایدار برای بازیافت بسته‌بندی‌های آسپتیک چندلایه

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده محیط زیست، دانشگاه تهران، تهران، ایران.

2 دانشکده محیط زیست، دانشگاه تهران، تهران، ایران

چکیده

بازیافت کارتن‌های آسپتیک به دلیل ساختار چندلایه با چالش‌های زیادی مواجه است. این پژوهش به‌ منظور بهینه‌سازی فرآیند انحلال پلی‌اتیلن کم‌چگالی (LDPE) و ارائه روشی کارآمد برای بازیافت مؤثر این مواد انجام شد. کارتن‌ها از برندهای مختلف جمع‌آوری، شسته و خشک شدند و انحلال LDPE با ترکیبی از حلال‌های زایلن، تولوئن و بنزین صورت گرفت. با استفاده از طراحی آزمایش Plackett-Burman، پارامترهای مؤثر بر انحلال شناسایی شدند. نتایج نشان داد که نسبت بهینه حلال‌ها برای انحلال LDPE به صورت بنزین:زایلن:تولوئن (50:25:25) حجم/حجم است. پارامترهای مؤثر به ترتیب شامل نسبت جامد به مایع، درزهای دولایه، دما و زمان بودند. در شرایط بهینه (120 درجه سلسیوس و 30 دقیقه)، انحلال کامل LDPE برای تمامی برندها به‌دست آمد. درصد بازیابی LDPE و حلال به ترتیب 100% و 90% بود. روش‌های متداول جداسازی آلومینیوم از کاغذ موفق نبودند، اما استفاده از جداساز جریان گردابی (ECS) برای این منظور مناسب تشخیص داده شد. علاوه بر این، حذف مرحله هیدروپالپینگ از فرآیند بازیافت، موجب بهبود انحلال LDPE شد. این پژوهش می‌تواند به توسعه روش‌های بازیافت کارآمدتر و مدیریت پایدار پسماند کمک کرده و گامی در جهت تحقق اقتصاد چرخشی باشد. برای اجرای صنعتی این روش، مطالعات بیشتری در زمینه مقیاس‌پذیری، ارزیابی اقتصادی و اثرات محیط‌زیستی مورد نیاز است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A Sustainable Approach to Recycling Multi-Layer Aseptic Packaging

نویسندگان [English]

  • Pouya Shoaie 1
  • Alireza Bazargan 2
1 Faculty of Environment, University of Tehran, Tehran, Iran
2 Faculty of Environment, University of Tehran, Tehran, Iran
چکیده [English]

Recycling aseptic cartons poses significant challenges due to their complex multi-layer structure. This study focuses on optimizing the dissolution of low-density polyethylene (LDPE) to develop an efficient recycling method for these materials. Cartons from various brands were collected, cleaned, and dried, with LDPE dissolved using a solvent blend of xylene, toluene, and gasoline. The Plackett-Burman experimental design was employed to identify key factors affecting dissolution. The optimal solvent ratio was determined to be 50:25:25 (v/v) gasoline, xylene, and toluene. Critical parameters, in order of influence, included the solid-to-liquid ratio, double-layer seams, temperature, and time. Under optimal conditions (120°C for 30 minutes), complete LDPE dissolution was achieved across all brands. Recovery rates reached 100% for LDPE and 90% for the solvent. Traditional methods for separating aluminum from paper proved ineffective, but an eddy current separator (ECS) was identified as a viable solution. Furthermore, omitting the hydropulping step enhanced LDPE dissolution. This research paves the way for more effective recycling strategies, supporting sustainable waste management and advancing the circular economy. Additional studies on scalability, economic feasibility, and environmental impact are required for industrial application.

کلیدواژه‌ها [English]

  • Tetra Pak
  • Aseptic Cartons
  • Multi-Layer Composites
  • Chemical Recycling
  • Eddy Current Separation

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نشریه مهندسی عمران امیرکبیر
دوره 57، شماره 10
دی 1404
صفحه 1749-1768

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