| 摘要 |
<p>1504933 Aerobic sewage treatment AIR PRODUCTS & CHEMICALS Inc 19 July 1976 [19 July 1975] 30327/75 Heading C1C Waste water is treated by the activated sludge process by admixture with activated sludge in aeration tank, contacting the mixture with O 2 or O 2 -enriched air and introducing NaOH into the mixture to neutralize at least part of the CO 2 evolved, said method being performed so that the temperature of the mixture in the aeration tank does not exceed 35‹ C. Specification 1,424,801 is referred to.</p> |
