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Digestion systems can be configured with different levels of complexity. [36] In a single-stage digestion system (one-stage), all of the biological reactions occur within a single, sealed reactor or holding tank. Using a single stage reduces construction costs, but results in less control of the reactions occurring within the system.
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Commercially, food waste in the form of wastewater coming from commercial kitchens' sinks, dishwashers and floor drains is collected in holding tanks called grease interceptors to minimize flow to the sewer system. This often foul-smelling waste contains both organic and inorganic waste (chemical cleaners, etc.) and may also contain hazardous ...
A mechanical biological treatment (MBT) system is a type of waste processing facility that combines a sorting facility with a form of biological treatment such as composting or anaerobic digestion. MBT plants are designed to process mixed household waste as well as commercial and industrial wastes .
Greenhouse gas emissions can be divided into those that arise from the combustion of fuels to produce energy, and those generated by other processes. Around two thirds of greenhouse gas emissions arise from the combustion of fuels. [108] Energy may be produced at the point of consumption, or by a generator for consumption by others. Thus ...
By addressing food loss and waste, greenhouse gas emission mitigation is also addressed. By only focusing on dairy systems of 20 value chains in 12 countries, food loss and waste could be reduced by 4-10%. [75] These numbers are impactful and would mitigate greenhouse gas emissions while still feeding the population. [75]
Waste collection methods vary widely among different countries and regions. Domestic waste collection services are often provided by local government authorities, or by private companies for industrial and commercial waste. Some areas, especially those in less developed countries, do not have formal waste-collection systems.
Greenhouse Solutions with Sustainable Energy: Energy: energy efficiency, renewable energy, and natural gas: Mark Diesendorf: 2007: ISBN 978-0-86840-973-3: Half Gone: Oil, Gas, Hot Air and the Global Energy Crisis: Energy: oil depletion and global warming: Jeremy Leggett: 2005: Hard Choices: Climate Change in Canada: Climate change: effects in ...