Acidogenic outlet from biohydrogen reactor as phosphate solubilizing agent for integrated organic farming
2019
Sarkar, Omprakash | Chatterjee, Sulogna | Mohan, S Venkata
Experiments are designed and conducted in two stages where the semi-pilot scale acidogenic bioreactor is primarily operated with food waste (40 g COD/L). Cumulative bio-hydrogen production (CHP) of 59 L and volatile fatty acid (VFA) of 6.1 g/L is observed during the 5th cycle at 48th h of the acidogenic process. Secondly, VFA rich acidogenic outlet (AO) is studied for its real field application as phosphate solubilizing agent (PSA) in the soil for the cultivation of Lagenaria sicerari (bottle guard-BG). Regular addition of varied concentration of AO (Zone A- Control, Zone B- 1%, Zone C- 3%, Zone D- 6%, Zone E- 10% and Zone F- 15%) in the soil resulted in phosphate solubility. Relatively higher phosphate availability is observed in Zone-D (729 mg/g) on 148th day followed by Zone-F (551 mg/g), Zone-E (543 mg/g), Zone-C (450 mg/g), Zone-B (357 mg/g) and Zone-A (155 mg/g). Plant growth is evaluated on a regular basis which depicted that the maximum number of BG were harvested from the plants growing in Zone- D (16) followed by Zone-F (13), Zone-C (12), Zone-E (11), Zone-B (9) and Zone-A (5). Application of VFA rich AO illustrated the beneficial effect on phosphate solubility in soil and uptake by plants, thus the proposed formulation could be considered as an alternative PSA.
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