Technological Effectiveness of Sugar-Industry Effluent Methane Fermentation in a Fluidized Active Filling Reactor (FAF-R)

Abstract

Technological solutions allowing the increase of the technological efficiency of anaerobic methods of wastewater treatment are still under investigation. The weaknesses of these solutions can be limited by the use of active fillings. The aim of the present study was to determine the impact of fluidized active filling on the effectiveness of anaerobic treatment of sugar-industry effluent, the production efficiency and the qualitative composition of the biogas produced. High, comparable (p = 0.05) effluent treatment results were observed at tested organic load rates between 4.0 and 6.0 kg COD (Chemical Oxygen Demand)/m3·d. The COD removal rate reached over 74%, biogas yields ranged from 356 ± 25 to 427 ± 14 dm3/kg CODremoved and the average methane contents were approximately 70%. A significant decrease in effluent treatment efficiency and methane fermentation was observed after increasing the organic load rate to 8.0 kg COD/m3·d, which correlated with decreased pH and FOS/TAC (volatile organic acid and buffer capacity ratio) increased to 0.44 ± 0.2. The use of fluidized active filling led to phosphorus removal with an efficiency ranged from 64.4 ± 2.4 to 81.2 ± 8.2% depending on the stage. Low concentration of total suspended solids in the treated effluent was also observed.

The Effect of Static Magnetic Field on Methanogenesis in the Anaerobic Digestion of Municipal Sewage Sludge

“…In recent studies, it was proved that the magnetic field exerts a positive effect on many properties of fluids, i.e., it changes the polarization, and electric charge decreases surface tension and increases viscosity. In studies conducted so far, the magnetic field has usually been applied to separate solids, like, e.g., activated sludge, from the effluent [33,34]. It was also demonstrated to influence the growth and metabolism of bacteria.…”

A Review of the State of the Art of Biomethane Production: Recent Advancements and Integration of Renewable Energies

“…The l demonstrate that its presence in the start-up phase favors the form microbial granules from the flocculant. Not only was their hypothesis c solid retention was also independent of the hydrodynamic conditions i This means that this solution can be applied to both UASB and EGSB r et al [52] tried to overcome the limitations of the anaerobic treatment means of the innovative solution of the fluidized active filling reacto their experiment, the effect of FAF on sugar industry effluent was t organic loading rates (OLR), more precisely from 4 to 6 kgCOD/m 3 d. T that, within this OLR range, the COD removal efficiency was greater methane yield was greater than 70%. However, when the OLR was kgCOD/m 3 d, the effluent treatment efficiency strongly decreased mai An innovative solution was proposed by Torres et al [51], who carried out several experimental tests on laboratory scale reactors seeded with sludge coming from wastewater treatment plants (WWTPs) located in Spain.…”

“…This means that this solution can be applied to both UASB and EGSB reactors. Debowski et al [52] tried to overcome the limitations of the anaerobic treatment of wastewater by means of the innovative solution of the fluidized active filling reactor (FAF-R). During their experiment, the effect of FAF on sugar industry effluent was tested at different organic loading rates (OLR), more precisely from 4 to 6 kgCOD/m 3 d. The results showed that, within this OLR range, the COD removal efficiency was greater than 74% and the methane yield was greater than 70%.…”

Wastewater Treatment and Biogas Production: Innovative Technologies, Research and Development Directions

“…The optimization carried out has shown that the theoretical optimum operating conditions (922 mg/L SO 4 2− , ISR = 3.72) are expected to generate 361 mL biogas/gVS, 235 mL CH 4 /gVS, with reduction efficiencies of 27.5% VS, 27.4% TS, 75.1% TOC, 75.6% SO 4 2− , and 41.1% COD [1]. Dębowski and Zielinski [2] conducted research to determine the impact of fluidized active filling on the effectiveness of the anaerobic treatment of sugar-industry effluent and the production efficiency and qualitative composition of the biogas produced. The research was carried out on a fractional-technical scale.…”