The community of San Antonio is located in the Caranavi Province, Bolivia. According to the 2005 year survey, there are 420 habitants of the community. The population is estimated to increase to 940 by the year 2035. The average peak flow is currently 1.2 L/sec and is expected to increase to 2.14 L/sec by 2035. The organic load is estimated to be 45 gram BOD5/capita-day. The community is considering a free surface wetland to treat their wastewater. (a) What is the BOD5 loading generated in the year 2035 (kg/day)? (b) Use the BOD loading to estimate the maximum surface area (ha) required for a free surface wetland that would serve the community in 2035 and remove BOD to 30 mg/L. (c) Assuming you are now considering sizing a facultative lagoon instead of a free surface wetland. Quickly estimate the required surface area (m2) for a facultative lagoon to handle a peak flow in 2035, assuming a design water depth of 4 m and a hydraulic detention time of 20 days
The community of San Antonio is located in the Caranavi Province, Bolivia. According to the
2005 year
940 by the year 2035. The average peak flow is currently 1.2 L/sec and is expected to increase to 2.14
L/sec by 2035. The organic load is estimated to be 45 gram BOD5/capita-day. The community is
considering a free surface wetland to treat their wastewater.
(a) What is the BOD5 loading generated in the year 2035 (kg/day)?
(b) Use the BOD loading to estimate the maximum surface area (ha) required for a free surface wetland
that would serve the community in 2035 and remove BOD to 30 mg/L.
(c) Assuming you are now considering sizing a facultative lagoon instead of a free surface wetland.
Quickly estimate the required surface area (m2) for a facultative lagoon to handle a peak flow in 2035,
assuming a design water depth of 4 m and a hydraulic detention time of 20 days.
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