Specific methanogenic activity (SMA) of industrial sludge from the aerobic and anaerobic biological treatment

Abstract

In this study, specific methanogenic activity (SMA) tests were performed on textile sludge and food industry sludge. The textile sludge from an activated sludge was collected at the entrance of the secondary biologic clarifier and the food sludge was collected in a UASB reactor. Once collected, the sludges were characterized and tested for SMA. It was found that the microrganisms present in the food sludge had SMA of 0.17 gCOD-CH4 gSSV.d-1 and 337.05 mL of methane production, while the microrganisms of the textile sludge presented 0.10 gCOD-CH4 gSSV.d-1 of SMA and 3.04 mL of methane production. Therefore, the food sludge was more suitable to be used as a starting inoculum in UASB

Impact of Alum Water Treatment Residues on the Methanogenic Activity in the Digestion of Primary Domestic Wastewater Sludge

“…The SMA calculation was performed for each methane gas concentration. This was through the angular coefficient of the linear equation, obtained from the maximum slope curve, after plotting the volumes of methane, in terms of COD consumed, divided by the concentration of VSS of the inoculum (i.e., in gCOD-CH 4 per gVSS.d), as mentioned in [25,28,30].…”

“…Da Silva et al [30] compared the methanogenic activity in sludge digestion coming from the treatment of textile and food effluents, having observed higher SMA (0.17 gCOD-CH4/gVSS.d, for food sludge; 0.10 gCOD-CH4/gVSS.d, for textile sludge), and higher methane production (337 mL for food sludge; 3 mL for textile sludge). Kayranli and Ugurlu [41] Therefore, the temperature and the ratio between organic sludge and alum sludge seems to interfere in the production of methane and thus should be controlled in order to reduce the damage in anaerobic bacteria.…”

“…Da Silva et al [30] compared the methanogenic activity in sludge digestion coming from the treatment of textile and food effluents, having observed higher SMA (0.17 gCOD-CH 4 /gVSS.d, for food sludge; 0.10 gCOD-CH 4 /gVSS.d, for textile sludge), and higher methane production (337 mL for food sludge; 3 mL for textile sludge). Kayranli and Ugurlu [41] also found higher values for different temperatures (0.74 gCOD-CH 4 /gVSS.d (25 • C), 0.70 gCOD-CH 4 /gVSS.d (15 • C), and 0.68 gCOD-CH 4 /gVSS.d (10 • C)) in experiments with acetic acid as substrate.…”

Avaliação de rúmen bovino como inóculo de reatores anaeróbios

“…Os valores de AME do lodo de cervejaria, encontrados na primeira alimentação, podem ser considerados satisfatórios e coerentes para a atividade descrita em alguns estudos com lodos industriais. Silva et al (2013) realizaram o teste com dois inóculos: lodo têxtil (aeróbio), coletado na entrada de um decantador biológico secundário de sistema de lodos ativados, e encontraram um valor de AME de 0,10 g DQO-CH4 g SSV.d -1 , com uma produção de 3,04 mL de metano, e lodo alimentício, coletado de um reator UASB anaeróbio, com 0,17 g DQO-CH4 g SSV.d -1 , e produção de 337,05 mL de metano.…”