S.No |
ITEM |
AVB SYSTEM |
CONVENTIONALVERMICOMPOSTING |
BIOGAS SYSTEM |
|
1
|
Type of species |
Deep burrowing and Aerobic bacteria |
Surface dwelling earthworm (redworm) |
Anaerobic bacteria |
|
2
|
Mechanism of wastewater Stabilisation |
Aerobic bacterial process supported by earthworms |
Mainly redworm activity |
Anaerobic conversion |
|
3
|
Output |
Rich organic manure |
Compost |
Gas (not consistent),satisfies only 5-10% fuel requirement |
|
4
|
Waste loading |
Spreading in thin layer |
Windrow (piles) type |
Closed chamber |
|
5
|
Type of process |
Consistently aerobic |
Difficult to maintain aerobic condition |
Anaerobic |
|
6
|
Time required for waste stabilisation into manure |
Within 7 days |
About 45 days |
- |
|
7
|
C/N ratio adjustment |
No need to adjust C/N ratio |
C/N ratio of the waste needs to be adjusted daily by mixing cowdung |
- |
|
8
|
Labour & skill requirement |
Low,as turning & mixing operations are not required |
High,labour intensive as turning and mixing of waste piles has to be done regularly |
High skill required as the process is sensitive |
|
9
|
Shade requirement |
Not required,system can be set up without disturbing existing plantations |
Required,also,existing plantations at site needs to be cleared for construction |
- |
|
10
|
Area requirement |
Less |
More |
Less |
|
11
|
Odour |
Odour free due to Aerobic processing |
Odour present due to anaerobicity in waste piles |
Black liquid comes out as leachate which gives heavy odour |
|
12
|
Leachate |
Leachate is not produced and process is practised directly on soil |
Produced due to Anaerobic activity. Concrete bed(base) is necessary for processing. |
Produced due to Anaerobic activity which needs further treatment |
|
13
|
Type of waste handled |
All types of organic waste from hotels, Market yards,Slaughter houses,etc can be processed |
Selected waste after adjusting C/N ratio. Non- veg waste are not preferred |
Except cowdung ,it is difficult to handle any other waste |
