Untreated municipal wastewater contains microorganisms of fecal origin, such as
bacteria, viruses, protozoans, and helminths, which are the principal agents of
infectious diseases. In the Valley of Mexico, untreated wastewater is utilized
for the agricultural irrigation of 90,000 hectares located to the north of Mexico
City in the Mezquital Valley. In order to meet regulations, the effluent must be
treated. Although the removal of pathogenic microorganisms in conventional
treatment systems has been well documented, little research has been done to
determine the efficiency of Advanced Primary Treatment (APT) coupled with
filtration and chlorine disinfection. This study analyzed the reduction of
microorganisms in a system composed of Advanced Primary Treatment (APT), sand
filtration and disinfection. The regrowth of bacteria was monitored after a
prolonged period (48 hours). The measurements were undertaken in situ, in the
principal sewer outlets of Mexico City in an APT pilot plant followed by a sand
filter and a chlorination tank. Includes 12 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 500 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 10 |
| Published : | 01/01/2000 |
