Review – Biogas Technology to Treat Bioethanol Vinasse

Syaichurrozi, Iqbal

doi:10.12777/wastech.4.1.16-23

Cited by 15 publications

(7 citation statements)

References 42 publications

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“…This could be seen through the potassium and chloride concentrations in the DSW. Because of its high salinity, the DSW cannot be used as a fertilizer because the soil structure will be poor (not fertility) [22]. The plants growing in the soil are poisoned and die due to excessive of uptake of the ions (particularly chloride).…”

Section: Distillery Spent Washmentioning

confidence: 99%

“…Therefore, the insoluble COD could be removed at various pH conditions. At a low solution pH (below 5.5), the removal of the insoluble COD followed Equation ( 20), while at pHs above 5.5, it was adsorbed by coagulants following Equation (22). Meanwhile, the soluble COD could only be removed at a pH above 5.5 and its reaction was predicted through Equation (23).…”

Section: Modelingmentioning

confidence: 99%

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Effect of Current and Initial pH on Electrocoagulation in Treating the Distillery Spent Wash with Very High Pollutant Content

Syaichurrozi

Sarto

Sediawan

et al. 2020

Water

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The distillery spent wash (DSW) from bioethanol industries has a very high chemical oxygen demand (COD). Hence, the goal of this study is to investigate the effect of currents (2.5, 3 and 3.5 A) and initial pHs (4.4, 5.0 and 7.0) on electrocoagulation (EC) to decrease the COD in DSW. The results showed that the EC at the current of 3.5 A enabled a higher COD removal efficiency (74.9%) than those at the currents of 2.5 (35.4%) and 3 A (60.9%). Furthermore, the initial pH of 7.0 resulted in a higher COD removal efficiency than the initial pHs of 4.4 and 5.0. The solution pH and temperature increased throughout the process. The working volume was not constant due to the reactions of water reduction, evaporation and flotation. Scum and sludge productions were also monitored during the process. Then, the measured data (COD, sludge and scum) were used in the modeling. The simple mechanistic models were successfully built and applied to simulate the data in mass units with two different routes of process. Route 1 assumed that the COD was converted to sludge and then the latter was converted to scum. Route 2 assumed that the COD was converted to the sludge and scum at the same time. When the EC was operated at the initial pH of 4.4, the COD removal process followed route 1, but that at the initial pHs of 5.0 and 7.0, the COD removal process followed route 2. The higher the current applied in the EC, the higher the kinetic constants of ka and kb. Additionally, the higher the initial pH set, the higher the kinetic constants were. This showed that the formation rates of sludge and scum at the higher currents or initial pHs were faster than those at the lower values.

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Section: Distillery Spent Washmentioning

confidence: 99%

Section: Modelingmentioning

confidence: 99%

Effect of Current and Initial pH on Electrocoagulation in Treating the Distillery Spent Wash with Very High Pollutant Content

Syaichurrozi

Sarto

Sediawan

et al. 2020

Water

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“…Anaerobic digestion (AD) is one of treatment methods, that is widely applied in treating many organic wastes successfully [1][2]. It is superior to others, as it is cost effective [3]. Furthermore, the method can treat high pollutant content [4] and yields biogas as alternative energy [5], which is produced following the degradation of organic compounds during anaerobic digestion [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Experiment and Modeling to Evaluate the Effect of Total Solid on Biogas Production from the Anaerobic Co-Digestion of Tofu Liquid Waste and Rice Straw

Budiyono¹,

Syaichurrozi²,

Suhirman³

et al. 2021

Pol. J. Environ. Stud.

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Anaerobic co-digestion of tofu liquid waste and rice straw is an impressive study as the mixture of both wastes produced substrates with ideal total solid content. This study aims to analyze the effect of rice straw addition (0,1,3,5 and 7 g) to 250 mL tofu liquid waste on biogas yield. The rice straw addition resulted different variations of total solid which were 1.36, 1.67, 2.28, 2.89 and 3.49% w/w respectively. The increase in total solid content from 1.36 to 2.89% w/w, proportionally increased biogas yield from 58.66 to 130.44 mL/g TS. However, with total solid of 3.49% w/w, biogas yield would be decreased to 78.38 mL/g TS. Furthermore, the more the biogas yield was obtained, the more the total solid was removed. Biogas evolution profile followed the stepped curve and it was successfully modeled through double modified Gompertz models. The predicted optimum TS level to produce the highest amount of biogas yield (239.63 mL/g TS), after mixing with the total solid value of 3.14% w/w was successfully calculated through the Ratkowsky model.

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“…Anaerobic digestion is considered a method of biodegradation of organic waste with great potential. It is an accelerated and optimized reproduction of the natural cycle of decomposition of organic matter in the absence of molecular oxygen, highly applicable for the treatment of vinasse, being used for the production of biogas [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Vinasse Treatment Alternatives Through Process Simulation: A Case Study of Cuban Distillery

Llerena

Ones

Cárdenas

et al. 2021

Preprint

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Purpose Vinasse is one of the organic industrial effluents with major polluting effect. The objective of this work was to perform a techno-economic assessment of vinasses treatment alternatives for valorization of this waste through process simulation with Aspen Hysys v10.0. Methods Four alternatives were studied: (A_1) incineration and electricity generation, (A_2) desalinization, (A_3) anaerobic digestion and electricity generation and (A_4) drying. The selected packages for the evaluation and prediction of properties were: Lee-Kesler-Plöcker and NBS Steam, NRTL-Ideal, Peng-Robinson-Stryjer-Vera and NBS Steam and NRTL-Ideal respectively; the validation in these cases was carried out with data reported in the literature. The economic evaluation was carried according to the changes that each alternative determines in each one of the elements of effective cash flow comparing with the actual condition. Results With the alternative A_1, fertilizers ashes are obtained removing all the residual and the energy generation. By the alternative A_2, fertilizers salts and desalinate vinasses (for animal food) were obtained. By the alternative A_3, energy is generated from biogas. By the alternative A_4, dry vinasse is obtained which is used as fertilizer and animal food. Conclusion The polluting effect of the vinasse can be reduced with the proposed treatment alternatives. It was showed that the alternatives are feasible, being the alternative A_1 the best, with a NPV of $ 1.29 MMUSD, IRR 25.5% and DPBP 2.7 years. Process simulation are a valuable supporting tool when making decisions in investment projects for valorization of vinasse from the ethanol industry.

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Review – Biogas Technology to Treat Bioethanol Vinasse

Abstract: Abstract

Cited by 15 publications

References 42 publications

Effect of Current and Initial pH on Electrocoagulation in Treating the Distillery Spent Wash with Very High Pollutant Content

Effect of Current and Initial pH on Electrocoagulation in Treating the Distillery Spent Wash with Very High Pollutant Content

Experiment and Modeling to Evaluate the Effect of Total Solid on Biogas Production from the Anaerobic Co-Digestion of Tofu Liquid Waste and Rice Straw

Techno-Economic Analysis of Vinasse Treatment Alternatives Through Process Simulation: A Case Study of Cuban Distillery

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