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Cities are facing to a new environmental threat, namely the growing quantity and the complexity of waste. Waste generation rates have increased rapidly due to urbanization and industrialization. Per capita waste generation rates in many developing countries have nowadays exceeded one kilogram per day. In most OECD (The Organization for Economic Co-operation and Development) countries, municipal solid waste generation rates are slightly above one-kilogram per capita. Moreover, the population growth and urbanization...

One of the main environmental issues of society today is the continuous increase in the amount of organic waste. Sustainable organic waste management no longer supports old practices that involved uncontrolled releases, landfill storage or incineration. A potential solution is converting organic matter into energy. Previous papers dealt with energy recovery of animal proteins and fats from tanneries into biogas and biodiesel after separation of the two components by pressing-centrifugation at temperatures of 60-80...