Directorate Of Municipal Administration-DMA has published Supply And Installation Commissioning Of 1 Tpd Biogas Plant. Submission Date for this Tender is 20-01-2020. Bio Gas Plant Tenders in Karnataka. Bidders can get complete Tender details and download the document.
| Sl No | Item Code | Item Name | Item Description | Unit | Quantity |
|---|---|---|---|---|---|
| 1 | SAGDPRBG | 1000kg FOODWASTE TO BIOGAS PLANT | Specification: BIOGAS PRODUCTION: 120 CUM/DAY FOR COOKING / HEATING APPLICATION 1 Biogas plant sizing Food waste-1000Kg Biogas production-162L/Kg, 125 CUM/d The specific biogas content of each feedstock assumed For stability of the digester we recommend to add 5kg of Cow dung daily. When the plant is operated at 37 +/- 2 degree C, with above feedstock and upon reaching the steady state, the system would produce the following results: Biogas Generation @ 55-60% methane : 125 (+/- 10 %) m3/day The digestate will be recycled in required quantity for dilution of feedstock to make the feed slurry of 10-12% solids. However, fresh water will be used to dilute accumulated salts / dead cells. It is assumed that the kitchen waste is source segregated and does not contain any inhibitory substance for the biological process. The performance of the plant is subject to meeting the above parameters. Feedstock Treatment and Anaerobic Digester (AD) To get optimum performance out of Anaerobic Digester (AD), it is necessary to maintain organic load to the digester, this is achieved by feeding at uniform rate. To achieve this, we propose: 1. Segregation panel and food waste crusher. 2. Primary Digester cum equalization tank : We propose primary digester for hydrolysis food waste before adding to secondary digester. 3. Pumping station and mixing tanks equipped with a suitably designed agitator for effective feeding of substrates. This tank will work as “Fill & Draw” tank. The feedstock along with fresh water and recycled digestate would be batched through the mixing tank before pumping it to Anaerobic Digester. The total solids in feed slurry would be about 12-15 % and this slurry would be fed to Primary digester at a uniform rate for the entire 24 hours in batches. 4. Secondary Digesters: Two streams from mixing tank and primary digester will be fed to the secondary digester throughout the day in batch manner. This will ensure uniform biogas generation over a period of 24 hours. Anaerobic Digester Design It is a non-medium, CSTR - Continuously Stirred Reactor. It is based on Mesophilic digestion i.e. it operates best in temp around 370 C and with pH maintained constantly at 7-8. Digester Gas holder will be Single Membrane stand alone balloon with safety system. In digester the raw waste and recycled sludge are introduced from top of digester. This mixed liquor travels downward. Inside digester, agitators/mixers provide adequate mixing of raw waste and recycled sludge. The digester content is kept well mixed with set of agitators/mixers. This constant agitation helps to maintain active bacteria in suspension. These bacteria utilize organic matter present in input slurry and produce consistent biogas. The recirculation of settled solids helps to maintain adequate population of active bacteria inside digester. The digester is provided with following accessories to ensure efficient performance and safety: Digester will be equipped with double membrane flexible roof (gas holder), slurry mixers/agitators. Slurry overflow point designed to serve as pressure breakers in case of emergency. In biogas line Pressure breaker and Vacuum breaker, in case pressure goes out of operating range. pH & temperature monitoring system. Biogas blower for consistent flow biogas. The treated effluent of digester is discharged from the top of digester will be collected in spent slurry tank. The biogas produced by anaerobic digestion inside the digester is collected from digester roof/gas holder. List of about plant & machinery– A Tanks One Digester – tank 40cum One Feed preparation tank-1 cum B Machinery 1 Feeding system 1.1Feed Pump 1.2 Crusher for food waste-200kg/hr 2 Digester area 2.1 Agitator3 Kw,1 no 2.2 Inspection Windows-1 no 2.3 Man Hole1 no C Biogas Holder 1 Single membrane Gas Roofs-6 cum, 1 set 2 Gas treatment 0.5cum/hour1, 1 set 3 Gas stoves 80-100LPM, 1 No 4 Biogas blower / booster 80-100LPM, 1 No D Electrical & automation 1 Total Plant Automation1 set E Miscellaneous 1 PVC / HDPE Piping-1 set 2 Valves Manual-Auto-1 set Utility Requirements for AD 1. Utility Power Operating Power - Approx. 30-40 kwh/day , Connected Power -Approx. 10 kW 2. Water required for substrate preparation-Approx. 1-1.5 KL/day of fresh water after plant stabilization | No | 1 |
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