| S.no | Item | SIBF system | Conventional ASP system | Biogas system | Septic Tank |
| 1 | Main Feature | Low operation cost and Low operating skill required | High operation cost and high operating skill required | 50% operation cost but high operating skill required | Only partial treatment possible |
| 2 | Process requirement and output | Treated water from SIBF system can be recycled directly |
Additional tertiary treatment is required if treated water has to be recycled
|
Black odourous liquid is produced which needs further treatment(ASP)& cannot be recycled Gas generated satisfies only 5-10% fuel requirement |
Additional large area required for soakpit If soakpit area is not available,Septic tank effluent requires further treatment No water recovery |
| 3 | Approximate capital cost | At par | At par | At par(with secondary treatment of septic tank effluent) | At par(with secondary treatment of septic tank effluent) |
| 4 | Approximate O & M cost | (Rs.X) | About(5X) | About(4X-5X) | about(3X-4X) |
| 5 | Mechanical and electrical equipment |
Only pumps; (means low operation and maintainence cost) |
Pumps + aerators +agitators+scrapping mechanism+control panel;(means high consumption of electrical energy;more wear and tear;high operation and maintainence costs) | Same as ASP | Same as ASP |
| 6 | Level of skill required for O & M |
Easy to operate Only parameter to be monitored is proper wastewater loading |
Skilled personell are required for effective performance Parameters like MLSS,SVI,pH are to be monitored regularly Aerators must run round the clock(adds to electricity costs) Continuous laboratory support is required |
Very high skill is required as this system is very sensitive Once the system is upset it requires several days for rectification Continuous laboratory support is required Other troubles of ASP are present
|
Same as ASP |
| 7 | Sturdiness and flexibility | Can effectively withstand shock loading and flow fluctuations | Sensitive to shock loading and flow fluctuations;It has to be recommissioned once it fails | Sensitive to shock loading and flow fluctuations;It has to be recommissioned once it fails | Sensitive to shock loading and flow fluctuations;It has to be recommissioned once it fails |
| 8 | Sludge generation | Sludge is not generated | Sludge is generated,hence handling and disposal is to be done | Sludge is generated,hence handling and disposal is to be done | Sludge is generated,hence handling and disposal is to be done |
| 9 | Physical appearence and location of ETP |
Appears like a garden This system can become landscaping |
Foaming & spilling from aeration tank gives an unsightly look Aerosols form, causing odour Thus isolated area required |
Black odorous liquid is produced Other troubles of ASP are present Thus isolated area required |
Black odorous liquid is produced Other troubles of ASP are present Thus isolated area required |
| 10 | Suitability of system for intermittent flow | Suitable | Not suitable | Not suitable | Not suitable |
