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تعیین کارایی زائدات پلاستیک، لاستیک و زائدات الکترونیکی در تصفیه فاضلاب شهری

نوع مقاله : مقالات پژوهشی

نویسندگان

1 دانشگاه علوم پزشکی سبزوار ، سبزوار ، ایران

2 بهداشت محیط دانشگاه علوم پزشکی سبزوار ، ایران

3 عضو هیئت علمی ، گروه مهندسی بهداشت محیط ، دانشکده بهداشت ، دانشگاه علوم پزشکی سبزوار ، سبزوار ، ایران

چکیده

چکیده
زمینه و هدف: افزایش تولید فاضلاب و همچنین تولید روزافزون زائدات، تهدید بزرگی برای سلامت بشر و محیط‌زیست محسوب می­شود؛ بنابراین باید نسبت به تصفیه فاضلاب و استفاده مجدد از زائدات اقدام نمود. مطالعه حاضر با هدف تعیین کارایی زائدات پلاستیک، لاستیک و زائدات الکترونیکی در تصفیه فاضلاب شهری به روش الکتروشیمیایی - میکروبی انجام شد.
مواد و روش‌ها: در این مطالعه تجربی- کاربردی که در مقیاس پایلوت انجام شد، تأثیر زمان‌ماند هیدرولیکی و خصوصیات اولیه (دما، pH و هدایت الکتریکی) بر بازده فرآیند تصفیه، در چهار بستر دارای زائدات مختلف بررسی شد. نمونه‌برداری هفته‌ای 2 مرتبه از ورودی و خروجی پایلوت‌ها انجام شد و پارامترهای اکسیژن خواهی بیولوژیکی، اکسیژن خواهی شیمیایی، کل مواد جامد معلق ، pH و EC بر اساس استاندارد متد اندازه­گیری و نتایج توسط نرم‌افزار اکسل تجزیه ‌و تحلیل شد.
یافته‌ها: میانگین کل BOD5، COD و TSS فاضلاب خام 227، 302 و 274 میلی‌گرم بر لیتر بود و راندمان حذف BOD5 در بستر زائدات الکترونیکی، لاستیک، پلاستیک و شاهد به‌ترتیب 46/72%،  74/69%، 82/60% و 17/62% به‌دست آمد. زائدات الکترونیکی به‌ترتیب با 52/55% و 96/79%، بیشترین راندمان حذف TSS و COD را داشت.
نتیجه‌گیری: جنس بستر در راندمان حذف BOD5تأثیر داشته است. بستر دارای زائدات الکترونیکی و لاستیک در حذف BOD5، TSS، COD راندمان بالاتری داشت که نشان‌دهنده خصوصیات برتر تصفیه فاضلاب توسط این زائدات است.
نوع مقاله: پژوهشی
کلید واژه‌ها: الکتروباکتر، تصفیه فاضلاب شهری، زائدات، فرآیند الکترومیکروبی شیمیایی

کلیدواژه‌ها

عنوان مقاله [English]

Determining the efficiency of plastic, rubber and electronic waste in municipal wastewater treatment

نویسندگان [English]

  • Abolfazl Rahmani Sani 1
  • Aalieh Tabasi 2
  • Mohammad Miri 3

1 Sabzevar University of Medical Sciences, Sabzevar, Iran

2 Environmental Health Sabzevar University of Medical Sciences, Iran

3 Faculty member, Department of Environmental Health Engineering, Faculty of Health, Sabzevar University of Medical Sciences, Sabzevar, Iran

چکیده [English]

Abstract
Background and Aim: Increasing wastewater production and increasing waste production are major threats to human health and the environment; therefore, wastewater treatment and waste reuse should be done. This study aimed to determine the efficiency of plastic, rubber, and electronic wastes for municipal wastewater treatment by the microbial electrochemical method.
Materials and methods: This experimental-practical research was done on a pilot scale. Impacts of time and initial characteristics (temperature, pH, and EC) on the treatment efficiency were investigated. During the research, sampling (twice a week) was done from the input and output of the reactor, and BOD
 
, COD, TSS, pH, and EC parameters were measured according to the standard methods. The results were analyzed by Excel 2010 software.
Results: Mean BOD
5
, COD, and TSS in raw sewage were 227, 302, and 274 mg/l. BOD5 removal efficiencies by electronic, rubber, plastic and control wastes were 72.46, 69.74, 60.82, and 62.17%, respectively. Electronic wastes with 55.52% and 79.96% had the highest removal efficiencies of TSS and COD, respectively.
Conclusion: Bed material affects BOD
5
removal efficiency. Substrates with electronic wastes and crumb rubber had a higher efficiency in removing BOD
5
, TSS, and COD, which shows the superior characteristics of wastewater treatment by these wastes.
Key words: Municipal Wastewater Treatment; Chemical Electro Microbial Process; Electrobacter; Waste

کلیدواژه‌ها [English]

  • : Municipal Wastewater Treatment
  • Chemical Electromicrobial Process
  • Electrobacter
  • Waste
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مجله پژوهش در بهداشت محیط
دوره 7، شماره 1
تیر 1400
صفحه 42-52
فایل ها
هم رسانی
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