Extent of recycling
Bangalore wastes have 21.27% of the recyclable materials: paper, polythene, cloth, rubber, glass and metals. Recyclable materials are one of the major sources of income. Seen below in Table 3, we indicate a hypothetical 1 tpd scale MSW based decentralized biomethanation and recyclable material recovery system. The results show that recovery of recyclable material of one ton waste will provide income of Rs.1451/t based on the known composition in 2000. A decentralized system with biomethanation and resource recovery through recyclable materials is currently running in Yelahanka New Town, North of Bangalore.
Table 3: Proposed 1 tpd scale decentralized biomethanation and recyclable recovery system
| |
|
Quantity /cost Rs |
Recovery (%) |
Rate Rs/kg or Rs/m3 |
Rs |
| INPUT |
Capital cost/d |
1200 Rs |
|
|
1200 |
| |
O, M&D/d |
450 Rs |
|
|
450 |
| Total input |
|
|
|
|
1650 |
| OUTPUT |
Gas output |
60 m3/d |
100 |
900 |
900 |
| |
Paper |
116 kg |
50 |
15 |
870 |
| |
Cloth, rubber, PVC, leather |
10.1 kg |
50 |
12 |
61 |
| |
Glass |
14.3 kg |
50 |
3 |
21 |
| |
Polythene/plastics |
62.3 kg |
50 |
12 |
374 |
| |
Metals |
10 kg |
50 |
25 |
125 |
| Total output |
|
|
|
|
2351 |
| NET GAIN |
|
|
|
|
701 |
| Source: Chanakya et al., 2009 |
|
