| 摘要 |
A process for the biological removal of phosphorus from waste water, comprises the steps of treating the waste water in an anaerobic zone and then in an aerobic zone, allowing the treated waste water to settle in a settlement zone, and passing the resultant activated sludge to the anaerobic zone; some or all of the sludge is treated to release intracellular carbon, e.g. using ultrasound, and the sludge is denitrified. Suitable water treatment apparatus comprises, in sequence, an anaerobic zone (1), an aerobic zone (3), and a settlement zone (4), means for passing, activated sludge from the settlement zone to the anaerobic zone, and means (5), e.g. a source of ultrasound, for treating the activated sludge to release intracellular carbon. <IMAGE> |
