relation: https://khub.utp.edu.my/scholars/3612/ title: Anaerobic transformation of biodegradable waste; Simultaneous production of energy and fertilizer creator: Malakahmad, A. creator: Nasrudin, S. creator: Ahmad Basri, N.E. creator: Md Zain, S. description: 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. © 2013 Science Publication. date: 2013 type: Article type: PeerReviewed identifier: Malakahmad, A. and Nasrudin, S. and Ahmad Basri, N.E. and Md Zain, S. (2013) Anaerobic transformation of biodegradable waste; Simultaneous production of energy and fertilizer. American Journal of Environmental Sciences, 9 (2). pp. 113-119. ISSN 1553345X relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877103793&doi=10.3844%2fajessp.2013.113.119&partnerID=40&md5=fcf0489d6c2731336e066a2994a64ed6 relation: 10.3844/ajessp.2013.113.119 identifier: 10.3844/ajessp.2013.113.119