Effects of size and autoclavation of fruit and vegetable wastes on biohydrogen production by dark dry anaerobic fermentation under mesophilic condition

Abubackar, Haris Nalakath; Keskin, Tuğba; Arslan, Kübra; Vural, Cansu; Aksu, Didem; Yavuzyılmaz, Duygu Karaalp; Özdemir, Güven; Azbar, Nuri

doi:10.1016/j.ijhydene.2019.05.106

Cited by 31 publications

(9 citation statements)

References 61 publications

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“…In addition, during the combustion of biohydrogen, water vapor and energy are released instead of greenhouse gases. [ 9,11,101 ] Carbohydrate‐rich raw materials with low amounts of nitrogen and requiring minimal pre‐treatment are suitable for biohydrogen production. [ 101,102 ] In this sense, FVW is a very useful resource for obtaining this biogas because of its biodegradability, low total solids content, and high volatile solids (VS) content.…”

Section: Fvw As Substrates To Obtain Different Productsmentioning

confidence: 99%

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Value‐Added Products from Fruit and Vegetable Wastes: A Review

Sánchez

Laca

et al. 2021

CLEAN Soil Air Water

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Fruit and vegetable wastes (FVW) are some of the most abundant agro‐industrial wastes. This residual biomass can be used to obtain biofuels such as bioethanol, biomethane, biohydrogen, and biobutanol. Additionally, FVW can also be employed as a raw material for recovering bioactive compounds (antioxidants, enzymes, or antibiotics) and to produce organic acids of industrial interest (citric acid, lactic acid, acetic acid). However, the use of these wastes as a substrate to obtain the mentioned value‐added products usually requires several steps, including different pre‐treatments, microbial biotransformation, and separation and purification processes. The aim of this work is to provide an overview of the different products that can be obtained from FVW, as well as the technologies that can be employed in the revalorization procedures.

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Section: Fvw As Substrates To Obtain Different Productsmentioning

confidence: 99%

“…[ 7,8 ] In addition, several studies have also been published on their use for producing biohydrogen, biomethane, and biobutanol. [ 9–14 ]…”

Section: Introductionmentioning

confidence: 99%

Value‐Added Products from Fruit and Vegetable Wastes: A Review

Sánchez

Laca

et al. 2021

CLEAN Soil Air Water

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“…Sentezgazdan etanol üretiminde görev alan Wood-Ljungdahlii yolizine göre aktif olarak görev alacak olan mikroorganizmalar asetojenik bakteri grubudur. Biyogaz üretim tesisinden alınan karışık kültürlerde baskın olan metanojenik bakterilerin ortamdan uzaklaştırılması için çeşitli ön işlemler uygulanmaktadır [25]- [27]. Bunlardan en yaygın olarak kullanılanı ve daha önce yaptığımız çalışmalarda elde ettiğimiz sonuçlara göre en ekonomik olanı otoklavda basınç altında ısıl işlem uygulanmasıdır.…”

Section: Etanol Ve Asetik Asit üRetim Değerleriunclassified

Bioethanol production by syngas fermentation from pyrolysis gas using mixed culture: Heat-pretreatment effect

Keskin¹,

Duman²

2020

Pamukkale J Eng Sci

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Son yıllarda hava kirliliğinin insan sağlığını ciddi boyutlarda etkileyecek düzeylere gelmesi ve yenilebilir enerji kaynaklarına olan gereksinimin artmasına sentezgazdan biyoetanol üretimi ortak bir çözüm sunmaktadır. Sentezgaz hava kirliliği oluşturan CO, CO2, N2, H2, NOx gibi gazların bileşiminden oluşur ve bazı Clostiridium türlerinin bu gazları metabolize ederek biyoetanol üretiminde kullanılabilir. Biyoetanol, benzinle karıştırılarak doğrudan kullanılabilmesi avantajından dolayı yenilenebilir enerji kaynakları arasında oldukça önemli bir biyoyakıttır. Biyoetanol üretiminde atık ve lignoselülozik hammaddelerin kullanılmasında uygulanan pahalı ön işlem yöntemlerine göre piroliz işlemi önemli bir alternatiftir. Bu çalışma kapsamında kullanılan biyoetanol üretiminde piroliz işlemi ile lignoselülozik atıkların biyokömüre dönüştürülmesi ve yan ürün olan atık gazın toplanarak biyoetanol üretiminde kullanılması iki faklı enerji kaynağının aynı sistemle üretilmesi açısından yenilikçi ve enerji verimli bir yaklaşımdır. Saf Clostiridium türleri ile piroliz gazından etanol üretiminde karışık kültür kullanılması da maliyetlerin düşürülmesi açısından oldukça önemlidir. Bu çalışma kapsamında biyokömür eldesi amacıyla meyve sebze atıklarının pirolizi sırasında açığa çıkan atık gazdan ısıl ön işlem uygulanmış karışık kültür kullanılarak biyoetanol üretimi gerçekleştirilmiştir. Karışık kültürde ısıl ön işlemin olumlu etkisi gözlenirken reaktörlere beslenecek piroliz gazı miktarı optimize edilmiş, en yüksek etanol üretimi 5 g/l olarak 5 ve 10 mL piroliz gazı beslemesinde gözlenmiştir.In recent years, the production of bioethanol from synthesis gas offers a common solution to the increasing levels of air pollution and the need for renewable energy sources. Synthesis gas is the combination of gases such as CO, CO2, N2, H2, NOx, which can form air pollution and can be used in the production of bioethanol by metabolizing these gases by Clostiridium species. Bioethanol is one of the most important biofuels because of the advantage of direct use by blending with gasoline. Pyrolysis and biochar production is an important alternative to expensive pretreatment methods used in waste and lignocellulosic raw materials in bioethanol production. In this study the wastes were converted into biochar by pyrolysis and the waste gas is collected to produce bioethanol which is an integrated and energy intensive approach. The use of mixed culture in the production of ethanol from pyrolysis gas instead of pure Clostiridium species is also important in terms of reducing costs. In this study, by using the the waste gas released during biochar production from fruit and vegetable wastes ethanol produced by syngas fermentation using heat pretreated mixed culture. While the positive effect of heat pretreatment was observed in the mixed culture, the amount of pyrolysis gas to be fed to the reactors was optimized and the highest ethanol production was observed in 5 and 10 mL pyrolysis gas feedings as 5 g/l..

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“…31 Regarding the H 2 production, studies conducted at thermophilic conditions 19,22,32 reported superior performance to those carried out in the mesophilic conditions. 19,22,33 However, regarding the soluble metabolite production, the influence of temperature on the composition of metabolites is minimal. 26 Another parameter that influences both H 2 and soluble metabolite production is the HRT, associated with the organic loading rate (OLR).…”

Section: Introductionmentioning

confidence: 99%

“…However, high temperatures in the thermophilic range (50°C‐64°C) are related to high rates of hydrolysis and increased microbial growth and metabolism 31 . Regarding the H 2 production, studies conducted at thermophilic conditions 19,22,32 reported superior performance to those carried out in the mesophilic conditions 19,22,33 . However, regarding the soluble metabolite production, the influence of temperature on the composition of metabolites is minimal 26 …”

Section: Introductionmentioning

confidence: 99%