Research Article Open Access

Anaerobic Transformation of Biodegradable Waste; Simultaneous Production of Energy and Fertilizer

Amirhossein Malakahmad1, Syazana Nasrudin1, Noor Ezlin Ahmad Basri2 and Shahrom Md Zain2
  • 1 University Teknologi PETRONAS, Malaysia
  • 2 University Kebangsaan Malaysia, Malaysia

Abstract

Almost 40% of the total waste produced in developing countries is made of biodegradable waste. Typically the waste including the biodegradable portion is transported to the so-called landfills without any segregation process, treatment and utilization in advance. Although mitigation practices such as source reduction, reuse and recycle are essential and required to be practiced in any integrated waste management plan, one of the best approaches to reduce the volume of the waste goes to the landfills is biological transformation. Biological transformation of waste occurs in two major categories; aerobic and anaerobic biodegradation. Anaerobic transformation of biodegradable waste produces methane gas (CH4) which is the valuable source of energy. At first the gas has some impurities such as CO2 and other trace materials which are required to be removed from the main stream before utilization. In addition to methane, the byproduct of the anaerobic process is slurry that can be used as soil amendment agent. It contains several vital elements such as nitrogen, phosphorous and potassium (N, P and K) for crops. The quality of slurry is required to be assessed since it affects the soil conditions and plants growth. In this study the importance of biological transformation in waste management systems has been discussed. Different methods and significant factors in methane production via anaerobic digestion have been highlighted and finally, the criteria of produced fertilizer have been elaborated.

American Journal of Environmental Sciences
Volume 9 No. 2, 2013, 113-119

DOI: https://doi.org/10.3844/ajessp.2013.113.119

Submitted On: 31 October 2012 Published On: 10 March 2013

How to Cite: Malakahmad, A., Nasrudin, S., Basri, N. E. A. & Zain, S. M. (2013). Anaerobic Transformation of Biodegradable Waste; Simultaneous Production of Energy and Fertilizer. American Journal of Environmental Sciences, 9(2), 113-119. https://doi.org/10.3844/ajessp.2013.113.119

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Keywords

  • Methane
  • Slurry Quality Control
  • Integrated Waste Management