In computational complexity theory, a problem refers to the abstract question to be solved. In contrast, an instance of this problem is a rather concrete utterance, which can serve as the input for a decision problem. For example, consider the problem of primality testing.
Oxygen plays a vital role in both the aerobic and anaerobic metabolic systems. While oxygen is required as a direct energy source in the aerobic system, it is also essential in clearing the blood of excess lactic acid buildup in the anaerobic system.
Anaerobic Digestion (AD) is the process where plant & animal material (biomass) is converted into useful products by micro-organisms in the absence of air. Biomass is put in sealed tanks and micro-organisms digest it releasing methane (biogas) that can be used to provide clean renewable energy.The digestate product from Anaerobic Digesters has increased nutrient availability, providing operators with a better performing product that can reduce fertilizer bills.he digestate product from Anaerobic Digesters has increased nutrient availability, providing operators with a better performing product that can reduce fertilizer bills.