Abstract

CUPE FLORES, Beatriz Esther  and  JUSCAMAITA MORALES, Juan Gabriel. Treatment of sewage sludge from a brewing industry through homlactic fermentation for the accelerated production of an organic fertilizer. Ecol. apl. [online]. 2018, vol.17, n.1, pp.107-118. ISSN 1726-2216.  http://dx.doi.org/10.21704/rea.v17i1.1179.

The residual sludge from a Waste Water Treatment Plant (WWTP) of the brewing industry are produced in large volumes, causing pollution problems. However, this can constitute a favorable substrate to make organic fertilizers in order to improve the quality of eroded soils. The present research aims to develop an Accelerated Liquid Fertilizer (ALF) taking advantage of the afore mentioned residual sludges through the homolactic fermentation process and using other inputs, such as a microbial consortium (B-lac) and cane molasses. Twenty-four different combinations of experimental units (T1-T24) and one control (T0) were treated for 5 days at 40 ° C, under a Full Random Design with 5x5 Factorial Arrangement. Also, the Tukey group test (p Lactuca sativa) seed toxicity bioassay, it was determined that a 0.1% dose of ALF was not detrimental to germination and normal growth of the seedlings; verified by a germination rate greater than 80%. In conclusion, the organic fertilizer of residual sludge from a brewing industry showed good agronomic quality.

Keywords : residual sludge; organic fertilizer; homolactic fermentation; acidolactic bacteria.

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