Agriculture Reference
In-Depth Information
1. A detailed survey of the existing infrastructure in the case study
area and a household level survey in the selected smaller areas.
2.
A detailed technical feasibility study, which included technical de-
sign and drawings of the set of technologies within each concept
scenario, thus demonstrating their technical feasibility.
2.3.4 RESOURCES FLOW ANALYSIS
The flows of the different resources were analyzed qualitatively and
mapped out for each concept scenario. The resources analyzed were water,
Nitrogen (N), Phosphorus (P), organic matter (OM) and energy. Then for
selected technologies calculations were performed to quantify the fl ows.
The input data used for these calculations are shown in the Tables 1-3
below:
TABLE 1:
Amounts and composition of urine and feces [25].
Waste stream
Amount
N (g/L)
P (g/L)
K (g/L)
Urine
1.2 l/p.d
3
0.8
1.3
Feces
150 g/p.d
2
0.6
0.6
TABLE 2:
Amount of organic solid waste and general characteristics of compost [26-28].
Waste stream
Amount
Density
N (g/L)
P (g/L)
OM (g/L)
Organic solid waste produced in
Xochimilco
650 g/p.d
-
n/a
n/a
n/a
Compost
-
450 kg/m
3
3.2
0.6
120*
* Calculated from [27,28].
The analysis and calculations not only show how (local) fi nite resourc-
es such as water, P and energy are recovered from waste (water), but also
how they can be reused. N and OM give a clear indication of how pollu-
