A study on bioethanol production from cashew apple pulp and coffee pulp waste

Shenoy, Deepa; Pai, Anjali; Vikas, R.K.; Neeraja, H.S.; Deeksha, J.S.; Nayak, Chetan; Rao, C.V. Dharma

doi:10.1016/j.biombioe.2011.05.016

Cited by 51 publications

(17 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The MC of coffee pulp exceeds 85% (Shenoy et al, 2011), which is similar to the initial MC measured in this study (Table 1). High MC values are common in agricultural crops.…”

Section: Resultssupporting

confidence: 73%

Use of coffee (Coffea arabica) pulp for the production of briquettes and pellets for heat generation

Cubero-Abarca

Moya

Valaret³

et al. 2014

Ciênc. agrotec.

View full text Add to dashboard Cite

Coffee bean (Coffea arabica) processing generates high amount of residues that are sources of environmental pollution. Therefore, an appropriate solution is needed. The objective of this study was to determine the potential of coffee pulp to produce briquettes and pellets. The study included pulp drying (using air, solar and hot air methods); the production of briquettes and pellets; the evaluation of their energy, physical and mechanical properties; and the evaluation of pellet quality using X-ray densitometry. The results showed that the pulp presented an initial moisture content of 90%, resulting in drying times of 699, 308 and 55 hours for air, solar and hot air drying, respectively, and the calorific values of the pellets and briquettes were 12,501 kJ kg -1 and 11,591 kJ kg -1 , respectively. The ash content was 8.68% for the briquettes and 6.74% for the pellets. The density of the briquettes was 1,110 kg m -3, compared with 1,300 kg m -3 for the pellets. The apparent densities were 1,000 kg m -3 and 600 kg m -3 for the briquettes and pellets, respectively, and the water absorptions by the briquettes were 7.90% and 8.10% by the pellets. The maximum horizontal compression effort was 26.86 kg cm -2 , measured in the pellets, compared with 4.52 kg cm -2 in the briquettes. The maximum horizontal load was 93.24 kg, measured in the briquettes, compared with 33.50 kg in the pellets. The value of the pellet durability test was 75.54%. X-ray densitometry showed that the pellet was uniform and a few cracks were observed on the pellet surface.Index terms: Coffee residues, drying, coffee processing, biomass, bio-resources. RESUMONo processamento dos grãos de café (Coffea arabica) ocorre o problema de geração de grandes quantidades de resíduos não utilizados pela indústria, tornando-se uma fonte de poluição ambiental. Portanto, é necessária a busca de soluções para atender a este problema de geração de resíduos. O objetivo do trabalho foi determinar a possibilidade de utilização da polpa dos grãos de café processados para a fabricação de briquetes e pellets. A pesquisa compreendeu a secagem da polpa dos grãos de café (pelo meio do ar, solar e ar aquecido); a manufatura de briquetes e de pellets; a avaliação das suas propriedades como fonte de energia e propriedades físicas e mecânicas e a determinação da sua qualidade pela metodologia de densitometria de raios X. Os resultados mostraram que a umidade inicial da polpa de café foi de 90% e o tempo de secagem foi de 699, 308 e 55 horas no ar, secagem solar e por ar quente, respectivamente. O poder calórico foi de 12 501 kJ kg -1 e de 11 591 kJ kg -1 de pellets e de briquetes, respectivamente; o teor de cinzas foi de 8,68% e de 6,74% para os briquetes e os pellets, respectivamente. Em relação às propriedades físicas, a densidade dos briquetes foi de 1.110 kg m -3 e dos pellets de 1.300 kg m -3 a densidade aparente dos briquetes foi 1.000 kg m -3 e de 600 kg m -3 dos pellets e a absorção de água de 7,90% dos briquetes e 8,10% e dos pellets. Finalmente, o esforço de c...

show abstract

“…The MC of coffee pulp exceeds 85% (Shenoy et al, 2011), which is similar to the initial MC measured in this study (Table 1). High MC values are common in agricultural crops.…”

Section: Resultssupporting

confidence: 73%

Use of coffee (Coffea arabica) pulp for the production of briquettes and pellets for heat generation

Cubero-Abarca

Moya

Valaret³

et al. 2014

Ciênc. agrotec.

View full text Add to dashboard Cite

show abstract

“…Other wastes generated from coffee processing such as spent grounds can be used for biodiesel production (Caetano et al 2014). There are a few studies investigating the potential for converting coffee pulp into ethanol (Bonilla-Hermosa et al 2014;Navia et al 2011;Shenoy et al 2011). However, a successful bioethanol production process also requires low energy consumption, competitive production cost, reasonable capital investment, and sustainable feedstock (Balat 2011).…”

Section: Introductionmentioning

confidence: 98%

“…Fermentable sugars obtained from coffee pulp such as glucose, mannose, and sucrose can be used produce petroleum-free chemicals such as ethanol, acetic acid, and acetone (Shenoy et al 2011). The cost of producing fermentable sugars depends largely upon the types and amounts of carbohydrates present in the pulp (Hughes et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Technical possibilities of bioethanol production from coffee pulp: a renewable feedstock

Gurram

Al-Shannag

Knapp

et al. 2015

Clean Techn Environ Policy

View full text Add to dashboard Cite

The present paper investigated the technical possibilities of bioethanol production from coffee pulp in a sustainable manner. Coffee pulp is a largely underutilized waste stream and has the potential to become a bioethanol feedstock if processing is economically viable. This study aimed to characterize the chemical composition of coffee pulp with relevance to bioethanol production and to compare results to other bioethanol feedstocks. Based on the total sugar yield, we investigated bioethanol production using AspenPlus simulation software. In the sugar characterization part, total carbohydrates were measured after complete acid hydrolysis of dry pulp, while water-soluble carbohydrates were measured after acid hydrolysis of soxhlet extracted solutions. Moisture, lignin, and ash contents were measured gravimetrically after appropriate heating treatments. The results showed sugar contents, expressed as percentages of dry mass, as follows: 5.8, 5.2, 20.2, 4.2, and 4.7 % for arabinose, galactose, glucose, xylose, and mannose, respectively. Arabinose, galactose, and glucose were the only water-extracted simple sugars, at 1.0, 1.4, and 2.6 % of dry mass, respectively. AspenPlus simulation was based on processing 10,000 ton/day of coffee pulp. The results demonstrated sugar and ethanol yield of 2100 and 1050 ton/day, respectively. This would make annually profit of $0.13 million. The simulation estimated the capital investment cost was about $2 million. In order to satisfy the process economy, the process operation cost must be operated at minimum of $1.87 million annually. The life-cycle analysis showed the net value of energy of the whole process is an economical as well as the balance of CO 2 emission/reduction was on the environmental favor.

show abstract

“…The use of nonedible agricultural products is interesting for having no impact on the food crops (sugar, corn, maize, and sorghum) prices. One source that has received little attention is the residue generated during coffee processing …”

Section: Introductionmentioning

confidence: 99%

Optimization of alkaline pretreatment of coffee pulp for production of bioethanol

Menezes

Carmo

Alves

et al. 2014

Biotechnology Progress

View full text Add to dashboard Cite

The use of lignocellulosic raw materials in bioethanol production has been intensively investigated in recent years. However, for efficient conversion to ethanol, many pretreatment steps are required prior to hydrolysis and fermentation. Coffee stands out as the most important agricultural product in Brazil and wastes such as pulp and coffee husk are generated during the wet and dry processing to obtain green grains, respectively. This work focused on the optimization of alkaline pretreatment of coffee pulp with the aim of making its use in the alcoholic fermentation. A central composite rotatable design was used with three independent variables: sodium hydroxide and calcium hydroxide concentrations and alkaline pretreatment time, totaling 17 experiments. After alkaline pretreatment the concentration of cellulose, hemicellulose, and lignin remaining in the material, the subsequent hydrolysis of the cellulose component and its fermentation of substrate were evaluated. The results indicated that pretreatment using 4% (w/v) sodium hydroxide solution, with no calcium hydroxide, and 25 min treatment time gave the best results (69.18% cellulose remaining, 44.15% hemicelluloses remaining, 25.19% lignin remaining, 38.13 g/L of reducing sugars, and 27.02 g/L of glucose) and produced 13.66 g/L of ethanol with a yield of 0.4 g ethanol/g glucose.

show abstract

A study on bioethanol production from cashew apple pulp and coffee pulp waste

Cited by 51 publications

References 25 publications

Use of coffee (Coffea arabica) pulp for the production of briquettes and pellets for heat generation

Use of coffee (Coffea arabica) pulp for the production of briquettes and pellets for heat generation

Technical possibilities of bioethanol production from coffee pulp: a renewable feedstock

Optimization of alkaline pretreatment of coffee pulp for production of bioethanol

Contact Info

Product

Resources

About