Development of a vinasse nutritive solution for hydroponics

Santos, José Darcy dos; Silva, André Luís Lopes da; Costa, Jefferson da Luz; Scheidt, Gessiel Newton; Novak, Alessandra Cristine; Sydney, Eduardo Bittencourt; Soccol, Carlos Ricardo

doi:10.1016/j.jenvman.2012.10.045

Cited by 75 publications

(35 citation statements)

References 6 publications

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“…This activity leads to the soil salinisation, mainly due to the high concentration of potassium in vinasse. These issues show that there is a need to develop more suitable use options for this type of ethanol production effluent (Santos et al, 2013). Biological treatment is recognized as hydrogen production and they analysed the effects of the hydraulic retention time on the process and the effects of the substrate concentration, respectively.…”

Section: Introductionmentioning

confidence: 99%

AnSBBR applied to biomethane production for vinasse treatment: effects of organic loading, feed strategy and temperature

Almeida

Ratusznei

Zaiat

et al. 2017

Braz. J. Chem. Eng.

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-This study assessed the feasibility of an anaerobic sequencing batch and fed-batch biofilm reactor (AnSBBR) with mechanical stirring for vinasse treatment and biomethane production. The amount of liquid medium used was 3 L, and the treated volume was 1 L per cycle. The cycle time was 8 h, with feeding times of 10 min (batch mode) and 240 min (fed-batch mode). Methane productivity increased with the increase in organic load from 1.0 to 10.0 gCOD.L (88% of the theoretical), respectively. These parameters were lower in fed-batch mode than in batch mode and were lower at 45°C than at 30°C due to biomass adaptation. In general, the values of the kinetic parameters increased with organic load and were similar for the batch and fed-batch modes. Therefore, the increase in organic load positively influenced the process by increased COD removal and lower volatile acids accumulation as the load increased. The batch mode performed better than did the fed-batch mode and 30°C was more suitable than 45°C to produce methane under the studied conditions.

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Section: Introductionmentioning

confidence: 99%

AnSBBR applied to biomethane production for vinasse treatment: effects of organic loading, feed strategy and temperature

Almeida

Ratusznei

Zaiat

et al. 2017

Braz. J. Chem. Eng.

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“…Vinasses are organic residues in the liquid state produced by ethanol industry; they are generated in a proportion of approximately 12-15 l for each litre of alcohol produced (Lozano et al, 2010;Santos et al, 2013). The properties of vinasses depend on the raw material used for ethanol production, thus vinasses derived from maize, barley, and wheat have a high quantity of insoluble solids; in contrast, vinasses derived from sugarcane, sugar beet, grape, agave, or sweet sorghum have a high proportion of soluble solids (Gamboa et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Mathematical models for prediction of rheological parameters in vinasses derived from sugar cane

Chacua¹,

Ayala²,

Rojas³

et al. 2016

International Agrophysics

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A b s t r a c t. The rheological behaviour of vinasses derived from sugar cane was studied as a function of time (0 and 600 s), soluble solids content (44 and 60 °Brix), temperature (10 and 50°C), and shear rate (0.33 and 1.0 s -1 ). The results indicated that vinasses were time-independent at 25°C, where shear stress values ranged between 0.01 and 0.08 Pa. Flow curves showed a shear-thinning rheological behaviour in vinasses with a flow behaviour index between 0.69 and 0.89, for temperature between 10 and 20°C. With increasing temperature, the flow behaviour index was modified, reaching values close to 1.0. The Arrhenius model described well the thermal activation of shear stress and the consistency coefficient as a function of temperature. Activation energy from the Arrhenius model ranged between 31 and 45 kJ mol -1 . Finally, the consistency coefficient as a function of the soluble solids content and temperature was well fitted using an exponential model (R 2 = 0.951), showing that the soluble solids content and temperature have an opposite effect on consistency coefficient values.

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“…Brazilian local environmental agencies such as CETESB have established norms for the appropriate discharge of vinasse (CETESB 2006). There are other method such as evaporation to produce animal food and incineration for potassium recovery, but these treatments require high costs (Navarro et al 2000;Dos Santos et al 2013). Given the importance of ethanol for the national economy and new restrictions on the use of vinasse, new alternatives should be evaluated.…”

Section: Introductionmentioning

confidence: 99%