digestion tank การใช้

• Lagoons are kept at ambient temperatures as opposed to the heated digestion tanks.
• In two-stage systems, different forms of digestate come from different digestion tanks.
• Alternatively, the addition of ferrous chloride FeCl 2 to the digestion tanks inhibits hydrogen sulfide production.
• They also allow excess material to be continuously extracted to maintain a reasonably constant volume within the digestion tanks.
• The heat produced as a by-product of electricity generation can be reused to heat the digestion tanks.
• In this instance, there may be a pasteurisation or sterilisation stage prior to digestion or between the two digestion tanks.
• It was then fed into carbon brick digestion tanks where the uranium was dissolved in hydrochloric acid containing a little sodium chlorate.
• The speed of this process is increased by heating the sludge in digestion tanks, enabling bacteria to break down the structure of the sludge.
• Imhoff tanks are being superseded in sewage treatment by plain sedimentation tanks using mechanical methods for continuously collecting the sludge, which is moved to separate digestion tanks.
• Sludge settled from the incoming sewage is treated by retention in enclosed heated anaerobic digestion tanks, a by-product of this process being methane gas which is used for on-site electrical power generation.
• More commonly with domestic sewage, the fresh sludge is continuously extracted from the tank mechanically and passed to separate sludge digestion tanks that operate at higher temperatures than the lower story of the Imhoff tank and, as a result, digest much more rapidly and efficiently.