مقایسه‌ی تأثیر نوع محیط کشت باکتری Sporosarcina Pasteurii بر میزان و نوع رسوبات کربنات‌کلسیم در جهت به‌سازی خاک‌های دانه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه عمران، دانشکده مهندسی، دانشگاه فردوسی مشهد

2 دانشگاه فردوسی مشهد

3 گروه آموزشی عمران، دانشکده مهدندسی، دانشگاه فردوسی مشهد، ایران

چکیده

استفاده از روش‌های مختلف بهسازی خاک‌ها، همواره با بررسی میزان تأثیر بر پارامترهای مقاومتی، هزینه و اثرات محیط‌زیستی ناشی از آن همراه بوده است. از آنجایی که روش‌های نو و سازگار با محیط‌زیست همراه با هزینه‌های اولیه زیاد می‌باشد، بهینه‌‌سازی این روش‌ها به منظور تجاری‌‌سازی آن‌ها در اولویت طرح‌های پژوهشی است. استفاده از روش‌های زیستی برای بهسازی خاک‌ها، با وجود سازگاری زیاد با محیط‌زیست در اغلب نقاط جهان از نقطه نظر اقتصادی مورد استقبال قرار نگرفته است و هنوز به عنوان یک روش آکادمیک و نه اجرایی مورد بررسی قرار می‌گیرد. بهسازی خاک با استفاده از رسوب کربنات‌کلسیم، از جمله روش‌های زیستی سازگار با محیط‌زیست است. از جمله تأثیرگذارترین پارامترهای تولید سوسپانسیون باکتری برای ترسیب کربنات‌کلسیم، محیط کشت آن بوده که معمولاً Nutrient Broth یا Yeast Extract می‌باشد. محیط کشت جایگزین، یکی از روش‌های کاهش هزینه‌های تمام شده در بهسازی زیستی خاک است. در این پژوهش استفاده از ملاس چغندرقند که از ضایعات کارخانه‌های تولید قند و شکر است، به عنوان محیط کشت باکتری مناسب در روش بهسازی زیستی در کنار محیط کشت‌های دیگر مورد بررسی قرار گرفت. این ماده می‌تواند هزینه تولید محیط کشت مناسب را تا 500 برابر کاهش دهد. موفقیت در بهسازی خاک پس از کشت باکتری در این پژوهش مورد ارزیابی قرار گرفته است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Analyzing the Use of Molasses as an Alternate and Optimal Culture Medium in MICP Process of Sandy Soils

نویسندگان [English]

  • Jafar Bolouri Bazaz 1
  • Mohammad Taghi Bolouri Bazaz 2
  • Seyyed mohsen karrabi 3
1 Civil Engineering Dept. Ferdowsi University of Mashhad
2 Ferdowsi University of Mashhad
3 Department Of Civil Engineering, Faculty Of Engineering, Ferdowsi University Of Mashhad
چکیده [English]

The use of different soil improvement methods has always been accompanied by an assessment of the effect on strength parameters, costs, and environmental impacts. Since the new and eco-friendly methods are associated with a high initial cost, optimizing these methods to commercialize them is the priority of research projects. The use of biological methods for soil improvement, despite its high environmental compatibility, has not been welcomed from the economic point of view in most parts of the world and is still being considered as an academic and not an executive method. Soil improvement, using calcium carbonate sedimentation is one of the most environmentally friendly biological methods. One of the most influential bacterial suspension parameters for calcium carbonate treatment is its culture medium, usually Nutrient Broth or Yeast extract. One of the ways to reduce the cost of biodiversity in the soil is an alternative culture medium. In this research, the use of sugar beet molasses, which is a waste of sugar and sugar factories, has been investigated as a suitable culture medium for biological improvement along with other culture media. It can reduce the cost of producing a suitable culture medium by up to 500 times. The success of soil regeneration after bacterial cultivation has been also evaluated in the present research.

کلیدواژه‌ها [English]

  • Biologic methods
  • Soil improvement
  • Bacterial suspension
  • Molasses
  • Suitable culture medium
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