بهینه سازی تولید زیست توده توسط‌ Monascus purpureus در محیط‌ کشت‌ حاوی لجن لبنی

نویسندگان
دانشگاه فردوسی مشهد
چکیده
ترکیبات ارزان قیمت و ضایعات صنایع مختلف دارای مجموعه‌ای از ترکیبات مغذی هستند که می‌توان از آن‌ها به عنوان بستر کشت سویه‌های مختلف جهت تولید متابولیت‌هایی با ارزش غذایی بالا و گران قیمت‌ تولید کرد. تولید رنگدانه از منبع میکروبی به دلیل ایمن بودن برای سلامتی انسان مورد توجه است. در این مطالعه با هدف تولید رنگدانه قرمز ازکپک Monascus purpureus ابتدا تاثیر فاکتورهای محیط‌ کشت‌ پوتیتو دکستروز براث، عصاره مخمر- ساکارز، لجن‌ لبنی‌، ‌ کنجاله‌ سویا، ملاس نیشکر، آب پنیر، دما، گلوکز، مونو سدیم‌ گلوتامات و سولفات آمونیوم بر تولید زیست توده (معیاری از تولید رنگدانه)‌ از طریق‌ طرح پلاکت‌-برمن‌ مورد بررسی‌ قرارگرفت‌. سپس بهینه سازی فاکتورها براساس طرح مربع مرکزی انجام شد. براساس نتایج‌ بدست‌‌آمده محیط کشت‌ پایه‌ لجن‌ لبنی، گلوکز، مونوسدیم‌گلوتامات و دما تاثیر مثبتی‌ بر رشــد و تولید بیومس‌ (تولید رنگدانه‌) داشــتند. با بهینه‌سازی، تولید زیست توده‌ در لجن‌ لبنی‌ ١٠ در صد، مونوسدیم‌ گلوتامات ٩٩٩/٠ درصد، دمای ٢٧ درجه‌ سانتی‌گراد و ٨٣/٩ درصد گلوکز با تولید مقدار ١٥/٢٦ گرم بر لیتر زیســت‌ توده به‌ عنوان حالت‌ بهینه‌ بدســت‌ آمد. نتایج نشاندهنده قابلیت ضایعات لجن لبنی در رشد سویه میکروبی و تولید محصول قابل توجه می‌باشد.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Optimization of biomass production by Monascus purpureus in culture medium containing dairy sludge

نویسندگان English

Samira Moradi
Seyed Ali Mortazavi
Ferdowsi University of Mashhad
چکیده English

Cheap compounds and wastes of various industries have a set of nutritious compounds that can be used as a culture medium for different strains to produce metabolites with high nutritional value and expensive. Pigment production from microbial source is of interest because it is safe for human health. In this study, with the aim of producing red pigment from the mold Monascus purpureus, firstly, the effect of culture medium factors, potato dextrose broth, yeast extract-sucrose, dairy sludge, soybean meal, sugar cane molasses, whey, temperature, glucose, monosodium glutamate and ammonium sulfate on production biomass (a measure of pigment production) was evaluated through Plackett-Burman design. Then the factors were optimized based on the central square design. Based on the obtained results, dairy sludge base culture medium, glucose, monosodium glutamate and temperature had a positive effect on growth and biomass production (pigment production). With optimization, biomass production in 10% dairy sludge, 0.999% monosodium glutamate, 27°C temperature and 9.83% glucose were obtained with the production of 26.15 g/l of biomass as the optimal state. The results show the capability of dairy sludge waste in the growth of microbial strains and production of significant products.

کلیدواژه‌ها English

Biomass
Monascus purpureus
Optimization
Dairy sludge
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