Influence of supplemented nutrients in tequila vinasses for hydrogen and polyhydroxybutyrate production by photofermentation with Rhodopseudomonas pseudopalustris

Tequila vinasses is a mixture made from up to six still distillation two-stage process residual effluents. First stage fractions: residual must (60%), heads (0.9%) and tails (20.0%); second stage fractions: non-evaporated (8.0%), heads (0.1%) and tails (1.0%); the result is a more complex effluent for its treatment or biorefining. The objectives of this study were to: (a) characterize the five still distillation volatile streams in the Tequila 100% Agave processing; compounds: methanol, ethanol, acetaldehyde, ethyl acetate, sec-butanol, n-propanol, iso-butanol, n-butanol, iso-amyl, n-amyl, and ethyl lactate were detected by gas chromatography; calculated chemical oxygen demand from chemical composition had very high values (53,760–1,239,220 mg/L); measurement of pH (3.24–4.80), color (38.6 UC Pt-Co max), turbidity (46.1 max), electrical conductivity (3.30–172.20 μS/cm), and solid content (0 mg/L) was also made; (b) report an energy analysis (2.02 × 109 KWh) and CO2 production (429 × 106 kg) in the Tequila industry during 2019; (c) up to date residues (365.2 × 106 kg agave bagasse, 1146.1 × 106 kg agave leaves and 3300.0 × 106 L agave vinasse) in 2019; (d) economic analysis, current tequila vinasses treatment price is 16.00 USD/m3 but could reach a considerable fraction value if is bio-refined, a break down component analysis reach for five volatile streams $51.23–$140.00 USD/m3.

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Modeling pH and temperature effects on the anaerobic treatment of tequila vinasses

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.6361 ◽

2020 ◽

Vol 95 (7) ◽

pp. 1953-1961 ◽

Cited By ~ 3

Author(s):

Jazael G Moguel‐Castañeda ◽

Hector Puebla ◽

Hugo O Méndez‐Acosta ◽

Eliseo Hernandez‐Martinez

Keyword(s):

Temperature Effects ◽

Anaerobic Treatment ◽

Tequila Vinasses

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Evaluation of alkalinity spatial distribution in an up-flow fixed bed anaerobic digester

Water Science & Technology ◽

10.2166/wst.2017.612 ◽

2017 ◽

Vol 77 (4) ◽

pp. 948-959 ◽

Cited By ~ 1

Author(s):

Maha Hmissi ◽

Jérôme Harmand ◽

Victor Alcaraz-Gonzalez ◽

Hedi Shayeb

Keyword(s):

Experimental Data ◽

Experimental Study ◽

Spatial Distribution ◽

Volatile Fatty Acids ◽

Fixed Bed ◽

Control Process ◽

Fixed Bed Reactor ◽

Hydrodynamic Behavior ◽

Sampling Points ◽

Tequila Vinasses

Abstract In this paper, an experimental study upon alkalinity and hydrodynamic behavior in an anaerobic up-flow fixed bed reactor for the treatment of tequila vinasses is presented. Measurements of volatile fatty acids, pH, alkalinity and bicarbonate were obtained at three sampling points in the reactor in the axial axis. Then, the spatial distribution of alkalinity is studied and discussed. Moreover, for further control process purposes, a hydrodynamic model based on the use of two interconnected two-steps reduced AM2 type models is proposed and its parameters are identified using experimental data.

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Biogas production in an anaerobic sequencing batch reactor by using tequila vinasses: effect of pH and temperature

Water Science & Technology ◽

10.2166/wst.2015.520 ◽

2015 ◽

Vol 73 (3) ◽

pp. 550-556 ◽

Cited By ~ 16

Author(s):

J. Arreola-Vargas ◽

N. E. Jaramillo-Gante ◽

L. B. Celis ◽

R. I. Corona-González ◽

V. González-Álvarez ◽

...

Keyword(s):

Sequencing Batch Reactor ◽

Batch Reactor ◽

High Energy ◽

Full Scale ◽

Operating Conditions ◽

Cod Removal ◽

Medium Size ◽

Suitable Alternative ◽

Anaerobic Sequencing Batch Reactor ◽

Tequila Vinasses

In recent years, anaerobic digestion has been recognized as a suitable alternative for tequila vinasses treatment due to its high energy recovery and chemical oxygen demand (COD) removal efficiency. However, key factors such as the lack of suitable monitoring schemes and the presence of load disturbances, which may induce unstable operating conditions in continuous systems, have limited its application at full scale. Therefore, the aim of this work was to evaluate the anaerobic sequencing batch reactor (AnSBR) configuration in order to provide a low cost and easy operation alternative for the treatment of these complex effluents. In particular, the AnSBR was evaluated under different pH–temperature combinations: 7 and 32 °C; 7 and 38 °C; 8 and 32 °C and 8 and 38 °C. Results showed that the AnSBR configuration was able to achieve high COD removal efficiencies (around 85%) for all the tested conditions, while the highest methane yield was obtained at pH 7 and 38 °C (0.29 L/g COD added). Furthermore, high robustness was found in all the AnSBR experiments. Therefore, the full-scale application of the AnSBR technology for the treatment of tequila vinasses is quite encouraging, in particular for small and medium size tequila industries that operate under seasonal conditions.

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