Mechanism of solar photo-thermal transformation for baffled liquid on energy and mass transfer efficiency in direct absorption anaerobic reactor

Abstract

Agricultural and animal husbandry waste causes serious environmental pollution. A new coupling model of flow heat transfer and anaerobic fermentation is established in this study to enhance the operation efficiency of anaerobic treatment equipment and guard total environment. The model has a vital ability to cut down the difference value between truthful data and predicted data. This model is used in a push-flow anaerobic reactor to study the effect of the baffle on the reactor temperature field and gas production efficiency. The results show that the increase of the baffle improves the temperature uniformity and gas production rate inside the reactor. The duration of the reactors with 15 baffles is approximately 1800 s less than that without baffle, and the relative time saving rate is as high as 56.5%. The gas production of the reactor with 15 baffles is 3.18% higher than that of the reactor without baffle. As time goes on, the concentrations of propionic acid, acetic acid and hydrogen all increase first and then decrease, but the larger BT has the lower concentration of each substance. This improved model can be used to make more accurate predictions in terms of energy and production.