1. Introduction
An excellent conservation potential through the production of biogas in Anaerobic Digestion (AD), and
the use of it as a renewable source of energy in Wastewater Treatment Plants (WWTPs) is the up to date
topic. A WWTP is an essential public service that simultaneously consumes a large amount of energy and
produces a significant amount of by-products (e.g. sludge). From a technical point of view, in these
countries, the use of Anaerobic Digestion (AD) of sewage sludge reduces the transportation costs of dry
sludge to landfills, and partially eliminates the need for filter presses or any other drying systems.
Therefore, one of the first resulting indirect benefits is the reduction of the amount of sludge sent to
landfills, reducing the Green House Gas (GHG) emissions (as methane) at the landfill. In our experience,
some other environmental benefits from AD include odor reduction, pathogen control, minimization of
sludge production, and conservation of nutrients.
1. Introduction
An excellent conservation potential through the production of biogas in Anaerobic Digestion (AD), and
the use of it as a renewable source of energy in Wastewater Treatment Plants (WWTPs) is the up to date
topic. A WWTP is an essential public service that simultaneously consumes a large amount of energy and
produces a significant amount of by-products (e.g. sludge). From a technical point of view, in these
countries, the use of Anaerobic Digestion (AD) of sewage sludge reduces the transportation costs of dry
sludge to landfills, and partially eliminates the need for filter presses or any other drying systems.
Therefore, one of the first resulting indirect benefits is the reduction of the amount of sludge sent to
landfills, reducing the Green House Gas (GHG) emissions (as methane) at the landfill. In our experience,
some other environmental benefits from AD include odor reduction, pathogen control, minimization of
sludge production, and conservation of nutrients.
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