2.2.4 feed organic (Organic Loading Rate; OLR) Organic feed rate depends on the flow rate and the concentration of the waste water to a value that is important to the design of fermentation tanks and systems as they relate to the concentration of biomass, that is in the system for the fermentation tanks (high rate reactor) can measure from the system can support a high organic feed. Which values are generally in the range of 5-40 kg of formaldehyde/d/day (Rittmann and McCarty, 2001). 2.2.5 temp (temperature). In General, in the wastewater temperature used is divided into 2 ranges: normal temperature range (30-40 degrees Celsius) and high temperature (50-60 degrees Celsius). Using the temperature affects the digestive acids and larger molecules is very simple. For waste water with organic elements and complexes have large particles. The temperature used in the process of creating methane as concerns very seriously. Speece (1996) says that the temperature used in the fermentation process will affect the value of μ K _ s _ max and which are important to the effectiveness of the work of the various groups of bacteria (Figure 3).
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