Studies of IDRC Supported Research on Greywater in ... - inwrdam

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6.5 Economic Components
1. Estimation <strong>of</strong> operating and maintenance
costs (US$) <strong>of</strong> the system (surveyors
will collect the data by interviewing the
respondents and will discuss with them
validity <strong>of</strong> the figures they propose)
A. Monthly electricity cost due to system
pump US$1.60; as an average
B. Monthly O&M costs US$1.10.
C. Monthly additional costs due to the
system; identify US$0.84.
2. Benefits <strong>of</strong> the system (US$); please identify each; (surveyors will value figures)
A. Greywater produced by the system = US$67.94/year
B. Increase in garden crop production = US$83.61/ year
C. Reduced septic tank emptying = US$95.27/year
D. Reduced water bill = US$25.72/year
E. Any other benefits = US$68.39/year
6.6 Greywater Separation and Training Components
1. Greywater separation
A. Please mark the greywater sources collected from your house?
• Kitchen: 23%
• Kitchen and sink: 12%
• Kitchen and sink and other as (shower, drain, laundry): 37%
• Kitchen and other as (shower, drain, laundry): 23%
B. Do you wish to have more greywater sources collected? 15% Yes, 85% No
Please explain reasons for choices;
Most <strong>of</strong> the responses were divided between the difficulty <strong>of</strong> adding new
sources because <strong>of</strong>:
• The existing building,
• The high cost <strong>of</strong> adding new sources,
• Religious and psychological reasons.
• Some users believe that the shower-water unacceptable due to religious
and psychological considerations.
C. Was the first barrel <strong>of</strong> your system changed from 160 to 50 liters?
97% Yes, 3% No