Influence of swine wastewater separation into solid and liquid fractions, on methane production with granular and disperse sludge
DOI:
https://doi.org/10.18633/biotecnia.v24i1.1537Keywords:
swine wastewater, methane, solid separation, granular sludge, disperse sludgeAbstract
In most cases, the current strategies to treat swine effluents in Mexico are not efficient, resulting in the discharge of partially treated wastewater, wasting an energy resource. This study aimed to evaluate the impact of the solid-liquid separation of swine wastewater on methane production using granular (GS) and disperse sludge (DS), under three concentrations. The COD concentration in the raw effluent (RE) was 13,640 mg/L, which corresponds up to 69 % to the solid fraction (SF) and the remaining to the liquid fraction (LF). The results indicate that the cultures with the SF produced the higher cumulative methane, increasing 1.47-, 1.31-, and 1.22-times in retaliation to the RE, at 3, 6, and 9 g VSS/L of DS. The solid-liquid separation strategy resulted in a higher methane production, evidenced by the amount of methane obtained by the SF and LF, which was 2.14- and 2.28-times higher than the obtained by the RE. The application of anaerobic processes to treat solid and liquid wastes will allow to recovery efficiently the energy from the transformation of organic matter into methane.
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