بررسی آزمایشگاهی اثر عوامل موثر بر بهبود فرآیندتولید بیوگاز از پسماندهای غذایی و آنالیز انرژی آن

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوکارشناسی ارشد ،مهندسی انرژیهای تجدیدپذیر،دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته

2 دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته کرمان

3 استادیار ، مهندسی مکانیک، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان

4 استادیار ، مهندسی شیمی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان

چکیده

دراین پژوهش، پارامترهای موثر در تولید بیوگاز از پسماند های غذایی به همراه کود دامی موجود در منطقه و افزودنی‌های ارگانیک بررسی شده است. پسماند‌های غذایی از رستوران دانشگاه جمع آوری و با کود دامی(گاوی) با نسبت های مختلف 1:1، 1:2، 1:3، 3:1 درمقیاس آزمایشگاهی‌ در محدوده دمایی ترموفیلی(55-60 درجه سانتی گراد) به مدت 15روز قرار داده و حجم گاز تولیدی اندازه‌گیری شد. نتایج حاصل از تولید گاز نسبت 1:1 کود دامی و پسماند غذایی، بالاترین میزان گاز تجمعی با حجم 5لیتر را نشان داد. با افزودن 10 گرم افزودنی شیمیایی سیلیکا ژل و گیاه رزماری ، ،پوست گردو،پوست موز و گوجه به مخلوط فوق به ترتیب میزان گاز تجمعی با 4/24%،7/2 %،3/2 %،9/1 %، 6/ % درصد حجمی افزایش را نشان داد. در طول دوره هضم، تغییرات pHنشان داد که بالاترین میزان حجم گاز در pH خنثی تولید شد.و ‌‌استفاده از پوست گردو باعث تثبیت pH در فرایند شد. همچنین با اندازه‌گیری خواص ترموفیزیکی(مواد جامد،مواد فرار،رطوبت، درصد خاکستر) مخلوط پسماند غذایی با کود دامی ظرفیت تولید بیوگاز 43/0 درصد برآورد شدکه نشان دهنده ظرفیت بالای پسماند غذایی برای تولید بیوگاز می‌باشد. بر اساس نتایج بدست آمده ازراکتور پرتابل آزمایشگاهی برروی مخلوط بهینه پسماند های غذایی وکود دامی آنالیز انرژی در آن بررسی شد.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental investigation of the effective parameters to improve process for biogas production from food waste and its energy analysis

نویسندگان [English]

  • mahdi hasani 1
  • masoud Iranmanesh 2
  • Hossein Amiri 3
  • Mahmoud Rahmati 4
1 M.Sc. Student, Energy Department, Kerman Graduate University of Advanced Technology, Kerman,
2 استادیار گروه انرژیهای تجدیدپذیر و تبدیل انرژی
3 Assistant Professor, Energy Department, Institute of science & High technology and environmental sciences, Kerman Graduate University of Advanced Technology, Kerman
4 Assistant Professor, Chemical engineering Department, Kerman Graduate University of Advanced Technology, Kerman
چکیده [English]

An experimental investigation has been done on the effective parameters on biogas extraction from the combination of food waste (FW) and cow manure and organic. Samples of FW were collected from the university restaurant and they mixed with the manure with different ratios of 1: 1, 1: 2, 1: 3, 3: 1 in a 1 liter polymeric bottles. These bottles embedded in a hot water bath at a thermophilic temperature of 55-60 ° C in a period of 15 days. The volume of biogas produced was measured. The results of gas production showed that the ratio of 1: 1 obtained the highest volume of cumulative gas ( 5 liters). Ten grams of chemical additive of silica gel and organic additives like rosemary plant, walnut shells, banana and tomato skin were added to the optimum selected ratio of digester. The produced cumulative biogas was increased 24.4%, 7.2%, 2.3%, 1.9%, 6.6% by volume respectively in compare with that of optimum based mixture. During the digestion period, PH changes showed that the highest volume of biogas was generated in neutral pH. And the use of walnut shells resulted in PH stabilization in the process. Measuring thermophysicsl properties (Total solids, volatile matter, moisture content, ash content), for the mixture of food waste and manure were shown the high capacity of food waste to convert to biogas (43%) Based on the laboratory experiments, energy analysis was performed for portable biogas reactor.

کلیدواژه‌ها [English]

  • Food waste
  • Biogas
  • Organic additives
  • energy analysis
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