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Water treatment

the Cauca Valley. This

the Cauca Valley. This is not the case with Cauca River water at Puerto Mallarino, where turbidity values can be consistently above 100 NTU during several weeks, as shown in figure 3.11, Section 3.2.1. Photo 4.26 Inlet structure to main treatment stages of multistage filtration treatment plants Figure 4.18 Corrugated PVC manifold used as part of drainage system of SSF units 173

Photos 4.27. Movable drainage device utilised to facilitate maintenance of SSF units 174