Sludge Treatment
ID
Name
Image
Description
Land requirement constraint
Energy constraint
Ground water level constraint
Skill constraint
Land requirement (m2/MLD)
CAPEX (INR/MLD)
OPEX (INR/MLD/Year)
Duration
Efficiency (%)
1
Co-composting
Co-composting is the controlled aerobic degradation of organics, using more than one feedstock (faecal sludge and organic solid waste).
High
Yes
Shallow
Yes
1000.0
92094037.5
13083937.5
0.0
2
vermicomposting
Vermicompost is the product or process of composting using various worms, usually red wigglers, white worms, and other earthworms to create a heterogeneous mixture of decomposing vegetable or food waste, bedding materials, and vermicast.
High
No
Shallow
Yes
1000.0
409818466.875
315140.0
0.0
3
sludge drying bed +co-composting
A sludge drying bed is a common method utilized to dewater sludge via filtration and evaporation.
Co-composting is the controlled aerobic degradation of organics, using more than one feedstock (faecal sludge and organic solid waste).
High
No
Deep
Yes
1000.0
25000000.0
80000000.0
0.0
4
lime stabilization
Lime is used for wastewater sludge treatment to achieve the reduction of pathogens, odours, degradable organic matter, and also as sludge conditioner to precipitate metals and phosphorus
, and has been implemented in the Philippines for FS treatment.
Low
Yes
Shallow
No
1500.0
161127.0
160000.0
5
Solar drying
This technology is generally constructed in greenhouse structures with transparent covers, concrete basins and walls. Sludge is disposed into these basins and processed for about 10 to 20 days. Options exist for batch or continuous operation, with devices to control the conditions in the greenhouses (e.g. ventilation, air mixing, temperature).
High
No
Shallow
Yes
2000.0
30000000.0
50000000.0
6
Shallow trenches
Shallow trenches are simple system and covered with suitable cover material.
High
No
Deep
No
2200.0
30000000.0
70000000.0
7
Geobags
Use of Geobags for the dewatering of water and wastewater sludges. This method of dewatering sludges has proved to a low cost and simple method of dewatering wastewater sludges for small plants.
Low
No
Shallow
No
3000.0
30000000.0
90000000.0
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