ABSTRACT
Fig. 2.1 Schematic diagram (not to scale) of PANPAPER mills’ effluent treatment system. Block
arrows indicate sampling points (1-7) PC = primary clarifier, SC = secondary clarifier
20 Chapter 2
Fig 2.2 A view of PANPAPER Mills wastewater treatment ponds
Table 2.1 The design parameters and purpose of the PANPAPER ponds
*The hydraulic retention times were calculated from pond volumes and the mean measured flow (34,201
m3/day) at the outlet of Pond 4. It was assumed that the flow was uniform through all the ponds. The pond volumes were derived from dimensions obtained from the factory records.
