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Assessment & Design (Feasibility)
Main treatment objectives
Rural sanitation & treatment
Biogas production
BOD / COD Reduction
Compost production
TSS and TDS reduction
Nutrient reduction
Pathogen reduction
Employment opportunities for IDP’s
Local procurement of material
Minimize O&M requirements
No use of chemical and power
Optimize land requirement
Recycling treated wastewater
Reducing desludging cost
Resources recovery
Reuse of sludge for agriculture
Solid/liquid separation
Required space
Required space
And
m²/person
Skills level
Communitarian operation
Design and Engineering Specialist
FSM specialist for construction
FSM specialist for design
FSM specialist for operation and maintenance
Local contractor for construction
Local NGO for operation and maintenance
No specialist
Design input flow
Design input flow
And
m³/day
Source of sludge
Health facilities
Dry latrines
Flush latrines
Septic tanks
Pit or tanks connected by greywater
Unlined pit latrines
Pit latrines affected by groundwater infiltraton
Lined pit latrines
Public toilets
Urine diversion toilet
Local constraints
Black cotton soil
drought
Earthquakes
Flood prone area
Landslide
High water table
illegal occupation of land
Limited land
Mountainous topography
Only locally available material
Rocky ground
Strong winds
Technologies employed
Activated sludge
Anaerobic baffled reactor
Anaerobic biodigester
Anaerobic filter
Anaerobic Lagoon
Sedimentation pond
Stabilization ponds
Polishing pond
Biogas reactor
Soil bio-technology STP
Burial pits
Co-composting
Constructed wetland
Disinfection
Upflow filter
Gravel filter
Glass beads filter
Sedimentation tank
Settling-thickening tank
Geotubes
Incineration
Infiltration
Lime treatment
Tricking filters
Unplanted drying beds
Planted drying beds
Sewer network
Rotary press
Sand filter
Treewell
Vermi-composting
Design population
Design population
And
persons
Construction
Capex / design input flow
Capex / design input flow
And
USD/m³/day
Time construction and commissioning
Week(s)
And
week(s)
Month(s)
And
month(s)
Year(s)
And
year(s)
Type of output
Biogas
Sludge
Charcol
Compost
Effluent
Design life
- Any -
Long term (years)
Short term (months)
Operation & maintenance
Real input flow
Real input flow
And
m³/day
Opex per real input flow
Opex per real input flow
And
USD/m³
Resources needed for operation
Chemicals
Water
Electricity
Engine
Sludge flow
COD Reduction
COD Reduction
And
%
TS Reduction
TS Reduction
And
%
Faecal coliforms reduction
Faecal coliforms reduction
And
Log reduction
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