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Adding Values to Agro-Industrial Byproducts for the Bioeconomy in Vietnam
Published in Anil Kumar Anal, Parmjit S. Panesar, Valorization of Agro-Industrial Byproducts, 2023
Son Chu-Ky, Nguyen-Thanh Vu, Quyet-Tien Phi, Tuan Pham Anh, Kim-Anh To, Le-Ha Quan, Tien-Thanh Nguyen, Hong-Nga Luong, Thu-Trang Vu, Tien-Cuong Nguyen, Tuan-Anh Pham, Thanh-Ha Le, Ngoc Tung Quach, Chinh-Nghia Nguyen
Since the beginning of the 21st century, due to issues related to global climate changes, resource depletion, national energy security, and geopolitical instability, biofuel production has increased. According to the US Department of Energy, in 2019, the world production of bioethanol reached 109.9 billion litres (https://afdc.energy.gov/data/10331). The US and Brazil are the two dominant players, with global production shares of 54.4% and 29.5%, respectively. The vast majority of bioethanol in the US is produced from corn, while in Brazil, sugarcane is the main feedstock. The remaining 16.1% bioethanol share is derived from sugar beet, cassava, sweet sorghum, etc. Vinasse, the remaining liquid after distillation of a fermented mixture to obtain ethanol, is the main by-product of the ethanol industry. For each litre of bioethanol, 12–14 litres of vinasse are produced (Leme and Seabra, 2017). Thus, the annual global vinasse by-product is estimated at 1.3–1.5 billion metric tonnes. In our calculation, one cassava ethanol factory with an average capacity of 100 million litres per year would produce 5000 m3 of vinasse every day, which contains 400 tonnes of carbon, 2 tonnes of nitrogen, 1 tonne of phosphorous, and 5.5 tonnes of potassium. If not handled properly, the amount of vinasse produced would cause a big environmental issue.
Microalgae Based Biofertilizers And Biostimulants For Agricultural Crops
Published in Gustavo Molina, Zeba Usmani, Minaxi Sharma, Abdelaziz Yasri, Vijai Kumar Gupta, Microbes in Agri-Forestry Biotechnology, 2023
Alex Consani Cham Junior, Ana Claudia Zanata, Sofia de Souza Oliveira, Eduardo Bittencourt Sydney, Andréia Anschau
The scientific literature is rich in studies showing the use of microalgae technology integrated to wastewater treatment. Among the most studied agro-industrial effluents is vinasse, a liquid effluent from the distillation columns of ethanol production. It is a dark acid residue, generally poor in carbohydrates (which were consumed during the anaerobic fermentation) but with high COD that is produced at a rate of 12–15L per liter of sugarcane ethanol (Santana et al., 2017). Vinasse is generally used in fertilization of crop fields, but environmental impacts such as soil desertification and groundwater contamination have been noticed (Carrilho et al., 2016). Moreover, the large volume of production opens opportunities for development of new technologies to give a more rational destination to this effluent. Several microalgae strains have been shown to be capable of growing in vinasse, but limitations regarding its turbidity require its dilution. Sydney et al. (2019) have carried a chemical treatment that allow microalgae to produce microalgae biomass at 100% vinasse medium. Different bioproducts derived from microalgae biomass produced in vinasse have been described, such as carbohydrates, lipids, proteins and pigments. Despite the direct application of microalgae biomass-rich vinasse as fertilizer or biostimulant was not yet evaluated, it seems possible that a potentiated effect can occur.
Potential Application of an Indigenous Actinobacterium to Remove heavy Metal from Sugarcane Vinasse
Published in Edgardo R. Donati, Heavy Metals in the Environment, 2018
Verónica Leticia Colin, Macarena María Rulli, Luciana Melisa Del Gobbo, María Julia del Rosario Amoroso
Based on this background, it is assumed that vinasse requires a conditioning treatment prior to its discharge in the environment. Besides, different alternatives for vinasse re-use as a by-product of the alcohol industry have been purposed in order to decrease their volume (Fig. 1). For example, agricultural use of vinasse as irrigation water or composting has been widely assayed because of the high potassium, nitrogen, and phosphorus concentrations that make it particularly attractive as a soil amendment or fertilizer (de Mello Prado et al., 2013). However, there are practical and legal restrictions on potassium content in the irrigation water; and these limits are often exceeded in raw vinasse (Soler da Silva et al., 2013). The presence of heavy metals in vinasses is also a major concern for agriculture when this effluent is used without a prior conditioning (Srivastava and Jain, 2010; Jain and Srivastava, 2012; Tchounwou et al., 2012). It is important to remark that small amounts of some metals such as cobalt (Co), copper (Cu), chromium (Cr), iron (Fe), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni), selenium (Se), and zinc (Zn) are common in our environments being nutritionally essential for a healthy life (WHO/FAO/IAEA, 1996). However, some metals such as lead (Pb) can show cellular toxicity even at low levels (Saidi, 2010).
Development of a simple biogas analyzer module (BAM) for real-time biogas production monitoring
Published in Environmental Technology, 2023
Luciano de Melo, Ianny Andrade Cruz, Lucas Tadeu Fuess, Carlos Eduardo Maynard Santana, Ram Naresh Bharagava, Sikandar I. Mulla, Muhammad Bilal, Ganesh Dattatraya Saratale, Renan Tavares Figueiredo, Luiz Fernando Romanholo Ferreira
The high organic content found in vinasse results in a great potential for producing biogas [38]. Nevertheless, a high concentration of H2S in vinasse-derived biogas is almost always certain due to the presence of sulfur compounds, primarily sulfate, in vinasse [39], demanding the proper monitoring of this biogas composition. This step is imperative for understanding the effective usability of the biogas, as well as for planning further purification and application steps. Thus, the BAM was used to record the biogas content and to depict the temporal profile of biogas generation in the vinasse digestion. In order to validate the results and measure the system accuracy, all this data from the gas phase was evaluated by the Alfakit methodology and showed good consistency.
Limiting factors for biogas production from cow manure: energo-environmental approach
Published in Engineering Applications of Computational Fluid Mechanics, 2019
Abuzar Jafari-Sejahrood, Bahman Najafi, Sina Faizollahzadeh Ardabili, Shahaboddin Shamshirband, Amir Mosavi, Kwok-wing Chau
Various studies have been carried out on biogas production. Tasnim, Iqbal, and Chowdhury (2017) performed a comparative study of biogas production through anaerobic co-digestion utilizing cow manure, sewage sludge, kitchen waste and water hyacinths. Experiments were conducted under mesophilic conditions (37°C) with 1.5 wt% of NaOH to obtain the desired pH. Cruz-Salomón et al. (2017) produced biogas from a native beverage vinasse; owing to the high value of organic materials and high degradable index, this can be a potential nutrient source for biogas production by anaerobic digestion. Bayrakdar, Molaey, Sürmeli, Sahinkaya, and Çalli (2017) investigated the use of poultry manure in a mesophilic anaerobic digester. Deepanraj, Sivasubramanian, and Jayaraj (2017) studied the influence of independent variables of biogas production, volatile solid degradation and chemical oxygen demand degradation during the anaerobic digestion of food waste. They used Taguchi-based gray relational analysis to determine the optimum conditions for anaerobic digestion. Table 1 indicates the resources for biogas production around the world.
Tuning active sites of N-doped porous carbon catalysts derived from vinasse for high-performance electrochemical sensing
Published in Particulate Science and Technology, 2023
Hasan H. Ipekci, Omer Kazak, Ali Tor, Aytekin Uzunoglu
Vinasse, a by-product of ethanol production, composes of water (93%) and solid parts (7%) encompassing a high level of salt and organic ingredients (Carrilho, Labuto, and Kamogawa 2016). Due to having a large amount of salt, the sugarcane vinasse accumulation in soil and water bodies leads to detrimental environmental effects due to pH and salt concentrations (Christofoletti et al. 2013). Since a large amount of vinasse is produced during the ethanol production process and its disposal is difficult, disposal and recycling are of great interest (Christofoletti et al. 2013; Rodrigues Reis and Hu 2017).