Investigation of compost production from municipal solid waste using solid state bioreactor (Case study: Amol)

Subject Areas : environmental management

Mohammad Hossein Heidarzadeh ¹ , Hossein Amani ² , Behzad Javadian ³ , Hasan Kariminezhad ⁴ , Mojtaba Navaei ⁵

1 - - MSc. Student of Biotechnology Engineering, Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
2 - Assistant Prof., Department of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran. *(Corresponding Author)
3 - Instructor, Faculty of Paramedical, Mazandaran University of medical sciences, Amol, Iran
4 - Assistant Prof., Department of Basic Sciences, Babol Noshirvani University of Technology, Babol, Iran
5 - CEO, Khazar Electric Co, Amol, Iran

Received: 2015-11-14 Accepted : 2016-06-22 Published : 2017-12-22

Keywords: Bioreactor, Crusher, Municipal solid waste, compost, the ratio of carbon to nitroge,

Abstract :

Background and Objective: Due to the large volume of waste produced in Amol and the proximity of the city to the sea and the forest, a proper waste management is urgent necessaryto prevent environmental pollution. On the other hand, organic waste occupies more than 80% of the Amol municipal solid waste. Therefore, a new method for compost production from municipal solid waste and a suitable quality comparison of the produced compost with Iranian National Standards Organization are aims of this study. Method: In this paper, compost production at a greenhouse closed and controlled condition as a novel method using of homemade designed crusher was studied. In this work also a new design of solid state bioreactor was used. In this reactor, aeration and stirring were carefully controlled; therefore, this reactor can be used in a large scale. Also parameters such as temperature, pH, C/N and ash were measured during the compost production. Findings: The results showed that the production of compost from this study obtained during 25 days that is less than the current processes. The ratio of carbon to nitrogen of the final product, pH and the electrical conductivity were 19.89, 7.29 and 7.7 dS/m, respectively. Also, results showed that the produced compost parameters are in agreement with first class compost based on the Iranian National Standards Organization. Discussion & Conclusion: According to the results, the method of this research can be proposed in high scale and high quality compost production from municipal waste.

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