Sugar Industry Research Articles

Improvement in Electrochemical Performance of Waste Sugarcane Bagasse-Derived Carbon via Hybridization with SiO2 Nanospheres.

Sugar industries generate substantial quantities of waste biomass after the extraction of sugar water from sugarcane stems, while biomass-derived porous carbon has currently received huge research attention for its sustainable application in energy storage systems. Hence, we have investigated waste sugarcane bagasse (WSB) as a cheap and potential source of porous carbon for supercapacitors. The electrochemical capacitive performance of WSB-derived carbon was further enhanced through hybridization with silicon dioxide (SiO2) as a cost-effective pseudocapacitance material. Porous WSB-C/SiO2 nanocomposites were prepared via the in situ pyrolysis of tetraethyl orthosilicate (TEOS)-modified WSB biomass. The morphological analysis confirms the pyrolytic growth of SiO2 nanospheres on WSB-C. The electrochemical performance of WSB-C/SiO2 nanocomposites was optimized by varying the SiO2 content, using two different electrolytes. The capacitance of activated WSB-C was remarkably enhanced upon hybridization with SiO2, while the nanocomposite electrode demonstrated superior specific capacitance in 6 M KOH electrolyte compared to neutral Na2SO4 electrolyte. A maximum specific capacitance of 362.3 F/g at 0.25 A/g was achieved for the WSB-C/SiO2 105 nanocomposite. The capacitance retention was slightly lower in nanocomposite electrodes (91.7-86.9%) than in pure WSB-C (97.4%) but still satisfactory. A symmetric WSB-C/SiO2 105//WSB-C/SiO2 105 supercapacitor was fabricated and achieved an energy density of 50.3 Wh kg-1 at a power density of 250 W kg-1, which is substantially higher than the WSB-C//WSB-C supercapacitor (22.1 Wh kg-1).

The optimization of sodium hydroxide (NaOH) pre-treatment for reducing sugar production from rice husk using response surface methodology (RSM)

Lignocellulosic biomass is an abundant renewable resource which amounts to 1.3 billion tonnes per year and can be used in a variety of sustainable applications. It is primarily made up of tightly bound cellulose, hemicellulose, and lignin. However, hemicellulose dissolution and delignification pose significant challenges to the utilisation of reducing sugar. To solve this issue, alkaline pretreatment was utilised. The aim of lignocellulosic biomass pretreatment is to break down the complex structure of the biomass and provide better access to the components that can be converted into useful reducing sugar. Response Surface Methodology (RSM) was used to identify the optimal values for the factors influencing the pretreatment. The optimisation parameters were sodium hydroxide concentration (1 – 4 % w/v), pretreatment time (15 – 60 minutes), and solid loading (6 – 16% w/v). Rice husk, which was used as biomass, was hydrolysed enzymatically to produce reduced sugar. The optimum conditions for producing the highest reducing sugar of 15.18 mg/mL from rice husk were 1.67% w/v sodium hydroxide pretreatment, 59.44 minutes of pretreatment time, and 7.67% w/v solid loading. As a result, less alkaline reagents can be used with a longer pretreatment time, thus lowering the cost of pretreatment. Therefore, this shows that RSM was one of the best methods to replace the conventional technique for optimising the parameters of rice husk alkaline pretreatment for reducing sugar production.

Combined effect of silicon and nitrogen doses applied to planting furrows on sugar, biomass and energy water productivity of sugarcane (Saccharum spp.)

Brazil has the largest cultivated area for sugarcane in the world, with a predominance of rain-fed production systems (64%) and marginal areas that are subject to frequent water deficits. The remaining 36% under cultivation is equipped with irrigation systems; however, a significant portion of these irrigation systems (76%) is dedicated to crop maintenance. Their primary purpose is to provide water for initial plant maintenance during planting and regrowth of ratoons, which helps to alleviate drought stress caused by water scarcity during dry periods. The remaining 24% of the irrigated sugarcane production areas use deficit and full irrigation strategies to partially (50%) and fully (100%) meet the plants’ water demands, respectively. Therefore, a large part of the cultivated area for sugarcane in Brazil is subject to a water deficit at one or more stages of the crop's development cycle, which can retard plant growth, nutrient use and productivity. One potential strategy for mitigating these harmful effects is the application of silicon (Si) in the furrow at planting, which can also increase crop water productivity (WPc). The objective of this research was to determine the effects of different applications of Si and nitrogen (N) on WPc, in terms of sugar (SWPc), biomass (BWPc) and energy (ENWPc) for sugarcane crop. The research was conducted at the University of São Paulo (USP/ESALQ), Piracicaba, São Paulo State, Brazil. The experimental design involved randomized blocks, with four blocks and 12 treatments. The treatments consisted of three applications of Si, 175, 350 and 525 kg·ha−1 and four N treatments of 15, 30, 60 and 90 kg·ha−1. Biometric responses, effects on juice quality, and indices related to yield and WPc were determined. The water consumption and agricultural yield (AY) of sugarcane were clearly influenced by the treatments. The lowest water consumption was obtained with the 15Nx350Si treatment, 561 mm per year. The treatment with the highest AY value was 60Nx350Si (162.3 Mg·ha−1). The SWPc, BWPc and ENWPc of the sugarcane crop were affected by the different application rates of N and Si. In general, the highest average WPc values were obtained with the 15Nx350Si treatment (SWPc=2.6 kg·m−3, BWPc=10 kg·m−3 and ENWPc=224.5 MJ·m−3). The different N and Si treatments did not significantly affect biometric variables (except for fresh biomass and leaf area) or juice quality; therefore, Si application did not compromise the quality of the end-product.

Treatment of Sugar Industry Wastewater via Fenton Oxidation with Zero-Valent Iron

The sugar industry is a significant contributor to wastewater production, primarily due to its substantial water usage. The treatment and reuse of this wastewater have become pressing concerns. In the present study, sugar industry wastewater was treated via Fenton oxidation using zero-valent iron (ZVI). The study focused on assessing the impact of key reaction parameters, namely pH, ZVI amount, [H2O2]0 on the removal of TOC. Optimal reaction conditions for the Fenton oxidation process were identified, with a pH of 3.5, 2 g/L of ZVI, and 4 mM of H2O2, resulting in nearly 65% of TOC removal. The kinetic study revealed that the observed reaction adhered to a second-order kinetic reaction model. Furthermore, the activation energy for this observed reaction was determined as 49.14 kJ/mol. These findings suggest that Fenton oxidation, utilizing ZVI, holds promise as an effective method for treating wastewater originating from the sugar industry.

Analisis Faktor-Faktor Yang Mempengaruhi Impor Gula di Indonesia Tahun 1992-2022

This research aims to determine the development of sugar imports in Indonesia and to analyze the influence of sugar production, sugar consumption, domestic sugar prices, international sugar prices, and the rupiah exchange rate on sugar imports in Indonesia in 1992-2022. This research is quantitative research and uses time series data. The data sources used were obtained from the Central Statistics Agency, Ministry of Agriculture, Ministry of Trade and several related studies. The analysis model used is development trend analysis and ECM (Error Correction Model). The results of research (1) in trend analysis in 1992-2022 obtained the equation Y = 2,317,827.5 + 174,230x showing that the average development of the volume of sugar imports was 2,317,827.5 tons and each year there was an average increase in sugar imports amounting to 174,230 tons. (2) Results of Multiple Linear Regression analysis of the ECM Model in the long term and short term. The variables that show a significant positive effect on sugar imports are domestic sugar prices and international sugar prices, while other variables such as sugar production, sugar consumption and the rupiah exchange rate show a positive effect. insignificant to sugar imports in 1992-2022.

Pemanfaatan Serabut Kelapa dan Abu Ampas Tebu Sebagai Substitusi Fiberglass dan Semen Pada Pembuatan GRC Board

In a construction project, the use of partition walls can cost quite a lot due to the high cost of raw materials used in partition walls. But unfortunately in the manufacture of GRC boards still use materials that are not environmentally friendly such as fiberglass (fiber fiber). Coconut fibers were used as additives because they have high tensile strength, while bagasse ash is used as a cement substitution to reduce production costs as well as help in reducing the amount of sugar industry waste. This study aims to find out the best mixture variations, density, water absorption,bending strength, hitting firmness, and price comparison. In this study, comparing conventional GRC Board with 3 variations of coconut fiber substitution mixture of 10%, 20%, 30% and bagasse ash 2.5%, 5%, 10% with a total of 48 samples and sizes for constancy tests at 20 cm x 20 cm x 0.6 cm and for flexural strength tests with a size of 10 cm x 10 cm x 0.6 cm. Mechanical testing based on SNI-01-4449-2006. The results of the test proved that the optimal mixture is in GRC Board D (30% coconut fiber and 2.5% bagasse ash) because it can produce better flexural strength and firmness than conventional GRC Board and GRC Board with bagasse ash and coconut fiber is 18% cheaper than conventional GRC Board.

Development and biochemical profile of Zingiber officinale under different population densities of Meloidogyne javanica

Ginger is a medicinal plant known for its aromatic, antioxidant, and pharmacological properties. This study aimed to examine the vegetative growth and biochemical profile of ginger exposed to Meloidogyne javanica at different initial inoculum levels. The experiment was conducted in a greenhouse using a completely randomized design. Treatments comprised 0, 2000, 4000, 6000, 8000, and 10,000 eggs of M. javanica and eight replications per treatment. At 70 days after inoculation, plants were harvested and evaluated for nematode parameters, vegetative growth, total phenolic compounds, gingerol content, antioxidant activity, and soluble sugars content. Total nematode number increased linearly as a function of initial inoculum level. The reproduction factor was greater than one (RF>1) in all treatments. Vegetative development, however, was not affected. The highest concentrations of total phenolics and gingerol were estimated to occur with initial inoculum levels of 4500 and 4000 eggs, respectively. Higher population levels (>6000 eggs) stimulated the production of soluble sugars in ginger rhizomes. Although increasing levels of M. javanica did not affect ginger vegetative development, it significantly altered biochemical parameters, such as total phenolic compounds, gingerol content, antioxidant activity, and soluble sugars content, proving that M. javanica influences the quality of ginger.

Green Extraction of Pectin from Sugar Beet Flakes and Its Application in Hydrogels and Cryogels.

Sugar beet flakes, a by-product of the sugar industry, were used as a source for pectin extraction that was performed using conventional citric acid extraction (CE) and two non-conventional extraction techniques-microwave-assisted extraction (MAE) and pulsed ultrasound-assisted extraction (PUAE). The influence of extraction conditions was studied for each technique based on pectin yield and galacturonic acid content, and spectroscopic, chromatographic and colorimetric methods were used for pectin characterization. Better results for pectin yield were achieved through CE (20.80%), while higher galacturonic acid content was measured in pectin extracted using PUAE (88.53 g/100 g). Pectin extracted using PUAE also presented a higher degree of methylation and acetylation. A significant increase in the molecular weight of pectin was observed for the PUAE process (7.40 × 105 g/mol) by comparison with conventional extraction (1.18 × 105 g/mol). Hydrogels and cryogels prepared with pectin from sugar beet flakes also showed differences in physicochemical parameters determined by the method of pectin extraction. Hydrogels had higher bulk density values irrespective of the pectin extraction method, and overall lower values of the textural parameters. Cryogels prepared with pectin from CE showed higher values of the textural parameters of hardness, adhesiveness, cohesiveness, gumminess and chewiness, while gels obtained with pectin from MAE and PUAE had higher thermal stability. The results of this study prove that sugar beet flakes can be considered a potential source for pectin production, and the extracted pectin is suitable for obtaining hydrogels and cryogels with physicochemical parameters comparable to the commercial citrus and apple pectin available on the market.

Enhanced starch accumulation in Chlorella sorokiniana as sugar platform and the expression profiling of key regulatory proteins

Microalgae can accumulate considerable starch as a renewable sugar platform for biofuel production. In this study, Chlorella sorokiniana exhibited a significant increase in starch content from 3.0% to 49.5% DM under sulfur limitation (SL) conditions, and the lower the concentration of sulfur was, the more effective it was. Direct enzymatic hydrolysis of wet biomass resulted in a glucose yield of 97.1%, indicating its potential for fermentable sugar production. However, C. sorokiniana grew slowly, and cell division and biomass accumulation decreased under SL conditions, which could be explained by the decreased photosynthetic efficiency and protein content. The sulfur replenishment (SR) confirmed the rapid response of C. sorokiniana in starch accumulation to sulfur availability. Thus, we further investigated the expression profiling of key regulatory proteins under Control-SL-SR stages. The expression of AGPase A was strongly induced in the SL stage and subsequently downregulated during SR stage, suggesting its role as a key regulatory protein for enhanced starch accumulation. Additionally, downregulation of SBE and GBE expression likely contributed to structural modifications of the starch molecules. These proteins could serve as potential targets for metabolic engineering in further improving the starch production capacity in C. sorokiniana.

The complex polyploid genome architecture of sugarcane

Sugarcane, the world’s most harvested crop by tonnage, has shaped global history, trade and geopolitics, and is currently responsible for 80% of sugar production worldwide1. While traditional sugarcane breeding methods have effectively generated cultivars adapted to new environments and pathogens, sugar yield improvements have recently plateaued2. The cessation of yield gains may be due to limited genetic diversity within breeding populations, long breeding cycles and the complexity of its genome, the latter preventing breeders from taking advantage of the recent explosion of whole-genome sequencing that has benefited many other crops. Thus, modern sugarcane hybrids are the last remaining major crop without a reference-quality genome. Here we take a major step towards advancing sugarcane biotechnology by generating a polyploid reference genome for R570, a typical modern cultivar derived from interspecific hybridization between the domesticated species (Saccharum officinarum) and the wild species (Saccharum spontaneum). In contrast to the existing single haplotype (‘monoploid’) representation of R570, our 8.7 billion base assembly contains a complete representation of unique DNA sequences across the approximately 12 chromosome copies in this polyploid genome. Using this highly contiguous genome assembly, we filled a previously unsized gap within an R570 physical genetic map to describe the likely causal genes underlying the single-copy Bru1 brown rust resistance locus. This polyploid genome assembly with fine-grain descriptions of genome architecture and molecular targets for biotechnology will help accelerate molecular and transgenic breeding and adaptation of sugarcane to future environmental conditions.

Reuse of Locally Available Paddy Waste in Sugar Industries: A Potential Source of Additional Income for Sugar Mills During Sugarcane Off-Season

Reuse of Locally Available Paddy Waste in Sugar Industries: A Potential Source of Additional Income for Sugar Mills During Sugarcane Off-Season

Trends in global sugar beet production and sugar consumption levels

Relevance. Sugar beet is one of the raw materials from which granulated sugar is produced, and it, in turn, is one of the indicators by which the food security of any country is assessed. In 2020, European countries produced 47.6% of the total global volume of sugar beet, Asian countries — 18.6%, America — 13.3%, the Russian Federation — 13.7%, African countries — 6.7%. At the same time, the share of sugar beet production in global production increased in Asian countries (from 15.9% in 2010 up to 18.6% in 2020), in the Russian Federation (from 10.1 to 13.7%), in African countries (from 4.6 to 6.7%). A decrease in sugar beet production was noted in European countries — from 55.4% in 2010 to 47.6% in 2020, in American countries — from 14 to 13.3%. In the Russian Federation, sugar production per capita generally meets not only rational consumption standards, but also all criteria for food self-sufficiency. The excess of actual consumption over rational consumption in Russia is 62.5%. The lowest sugar beet production volumes are observed in countries such as Greece, Portugal, North Macedonia, Pakistan, Azerbaijan, Turkmenistan, Kazakhstan, Moldova, Kyrgyzstan, and some others.Results. The results of the study showed that in order to increase the economic indicators of sugar beet production, Russian commodity producers need to implement a policy of intensification of agricultural production along with updating the material and technical base using modern agricultural technologies and the development of their own breeding and genetic centers.

An economic sustainability analysis of hybrid solar-biomass system for sugar industries in India

Renewable energy systems have been gaining more importance in developing countries not only due to the increase in concern towards environmental sustainability but also resolving the looming energy crisis that bewilders economic development. Till date, inadequate attention has been paid to the integration of Renewable Energy (RE) sources in the industrial sectors of TamilNadu, India. Since industries have been key drivers of electricity consumption in the past decade, this paper aims at the simulation and analysis of hybrid Biomass-Solar Photovoltaic system for electrification of the process industries, especially sugar industries. The main objective of the paper is to minimize the cost of energy and Green House Gas (GHG) emissions leading to sustainable development. The economic feasibility analysis is performed using Hybrid Optimization Model for Electric Renewables (HOMER) software and the sustainability analysis with the help of Clean Development Mechanism that can be adopted for the sugar industry. The simulation results support the effectiveness of the proposed grid connected solar-biomass hybrid system for the sugar industry with the net present cost of 16 million dollars (M$) combined with emission reductions of 6,266 tons/year.

Solar-driven sugar production directly from CO2 via a customizable electrocatalytic–biocatalytic flow system

Conventional food production is restricted by energy conversion efficiency of natural photosynthesis and demand for natural resources. Solar-driven artificial food synthesis from CO2 provides an intriguing approach to overcome the limitations of natural photosynthesis while promoting carbon-neutral economy, however, it remains very challenging. Here, we report the design of a hybrid electrocatalytic−biocatalytic flow system, coupling photovoltaics-powered electrocatalysis (CO2 to formate) with five-enzyme cascade platform (formate to sugar) engineered via genetic mutation and bioinformatics, which achieves conversion of CO2 to C6 sugar (L-sorbose) with a solar-to-food energy conversion efficiency of 3.5%, outperforming natural photosynthesis by over three-fold. This flow system can in principle be programmed by coupling with diverse enzymes toward production of multifarious food from CO2. This work opens a promising avenue for artificial food synthesis from CO2 under confined environments.

Changing food preferences and choices – A framework for analyzing households food purchases over time

Scientific interest in food consumption has grown significantly in recent decades due to its profound implications for individuals’ and societies’ health and wellbeing and implications for domestic and global systems sustainability. Food purchases can be directly and indirectly related to household and consumer characteristics. While food purchase habits may be dynamic and influenced by changing circumstances over the years, most related research presents a snapshot of the studied issues within a single year or period or focus on a specific social group or food commodity. This paper introduces and illustrates a framework for analyzing household food purchasing clusters over a period of time. It uses data from over 120,000 households in Israel to analyze household food purchases over two decades. The analysis segments the population into clusters and accounts for their food purchases through an extensive bottom-up approach. It identifies several major clusters, including small and large families and young and elderly households, each representing a unique range of food purchase patterns and a different share of the overall society. It analyses different levels of consumption, from broad categories to specific products, and examines the relationships between food purchases and household characteristics. Examining specific food categories and commodities illustrates a complex trend over the research period, including rising demand for beef, poultry, and soft drinks, steady patterns of consumption of frozen and canned vegetables and oils, and a clear decline in demand for dairy, grain, and sugar products.

Pengaturan Akad Mukhabarah bil Mudharabah dalam Kerja Sama Pertanian Tebu di Indonesia Perspektif Epistemologi

The mukhabarah bil mudharabah contract originates from a combination of two contracts, namely the mukhabarah contract and the mudharabah contract which are combined into one in the sugar cane farming partnership model. The formation of this contract is a new thing that is used as an effort to increase national sugar production by forming fair cooperation based on sharia contracts, however, the concept related to mukhabarah bil mudharabah contracts has not been concretely accommodated in statutory regulations, so this research aims to examine the regulation of mukhabarah bil mudharabah contracts in sugar cane farming partnership based on an epistemogical perspective. The research method used is normative juridical with a statutory and conceptual approach. The theory used is stufenbau theory. The results of this research indicate that at the meta-norm and grundnorm level there is already a legal basis for regulation regarding mukhabarah bil mudharabah contracts. The legal basis for regulating these contracts is also found at the level of Staatsfundamentalnorm norms and the level of Staatsgrundgezets norms, namely in the basic state regulations contained in Article 29 paragraph (2) of the 1945 Constitution, but at the next level there are only regulations regarding mudharabah contracts, while the mukhabarah contract has not been specifically regulated in the statutory regulations or other regulations below it.

Tailoring whole slurry bioprocessing for sugary stovers to augment sugar production by integrating soluble and insoluble carbohydrates

Obtaining sufficient concentrations of fermentable sugars from the polysaccharides of lignocellulosic materials represents a long-term challenge in achieving sustainable biorefineries. This work aimed to enhance sugar titers by employing high sugar-containing stovers (HSS) and combining its intrinsic soluble sugars with the two insoluble carbohydrates, namely cellulose and hemicellulose. Whole-slurry hydrolysis (WSH) was performed under low-to-high solid conditions using non-detoxified pretreated slurry, which exhibited a decrease in cellulose hydrolysis efficiency (CHE) from 89.08% to 42.1% as the solid loadings increased from 7% to 20%. A further WSH with detoxified slurry showed a significant increase in CHE from 42.1% to 59.52% at 20% solid loading, indicating that inhibitors present in the pretreated slurry had negative effects on CHE. Lower CHE with non-detoxified slurry accompanied by higher losses of cellulase and β-glucosidase activities, particularly at higher solid loadings. Therefore, systematic modification of WSH was performed by incorporating 2% syringic acid during pretreatment and 0.4% polyethylene glycol during saccharification, reformulating enzyme cocktails, and implementing a fed-batch experiment. These modifications resulted in a notable improvement in sugar production under high-solid loading (20%) and non-detoxified conditions, reaching 142.87 g/L total sugars with a CHE of 90.7%. These findings have revealed the potential of integrating soluble sugars with holocellulose for obtaining high-titer fermentable sugars in lignocellulosic biorefineries.

Hot-air drying vs. lyophilization of sugar beet flakes for efficient pectin recovery and influence of extraction conditions on pectin physicochemical properties

This study assessed the influence of drying pretreatment and extraction conditions (type of acid and particle size of plant material) on the yield and physicochemical properties of pectin from sugar beet flakes resulted as by-product of sugar beet processing in the sugar industry. The results indicated that the drying conditions (hot-air drying and lyophilization) affected the extraction yield, the chemical composition of pectin, its color, degree of methylation and acetylation, molecular weight, and its rheological and emulsifying properties. The best results for pectin yield (16.20%), galacturonic acid content (91.19 g/100 g), degree of methylation and acetylation (66.93 and 23.87%), and molecular weight (3.89 × 105 g/mol) were obtained when sugar beet flakes were pretreated by hot-air drying, and the extraction was made with citric acid using plant material with particle sizes of 125–200 μm. This pectin also had high emulsion activity (51.42%) and emulsion stability (88.03%). The FT-IR spectra were similar, while pectin thermal behavior was affected by the drying pretreatment and extraction conditions. The results of this study showed that from this by-product of the sugar industry it can be extracted high quality pectin with rheological and emulsifying properties that are superior to commercial citrus and apple pectin.

Sustainability analysis of biorefineries applying biotechnological routes to convert bagasse from non-centrifugal sugar production for rural economic development in Colombia

AbstractPanela is the second most important rural agro-industry after coffee in Colombia. This agro-industry produces a large amount of bagasse from non-centrifugal sugar (B-NCSP) without valorization. B-NCSP is used in combustion boilers in panela production, causing greenhouse gas emissions and health problems. This research aims to compare the sustainability of two B-NCSP biorefineries considering the current residue use. The sustainability of the biorefinery scenarios was analyzed to promote rural economic development in Colombia. In both biorefinery scenarios, biogas was evaluated as an energy vector to meet the energy demand of panela production. Two biorefinery scenarios were considered: (i) saccharification, bioethanol, and biogas production and (ii) acid pretreatment, saccharification, xylitol, bioethanol, and biogas production. Experimental data of the pretreatment, saccharification, and anaerobic digestion stages were used as input information in simulations. Technical, economic, environmental, and social metrics were used to estimate a sustainability index. The experimental glucose yield in scenario 2 was 0.42 ± 0.03 (31.52 ± 2.36 g/L) g/g B-NCSP, 1.8 times greater than scenario 1. The biogas yield in scenario 2 was 504.23 ± 21.68 (71.16% CH4) L/kg B-NCSP, 3.3 times greater than scenario 1. Scenario 1 was unfeasible at different scales. Xylitol production helps to improve the economic feasibility in scenario 2 since the payback period was 15 years. This scenario can create 36 job positions with a wage 18% higher than the minimum wage in Colombia (highest sustainability index of 72.44%). Finally, biogas produced in scenario 2 supplies 62.76% of the energy demand needed in the panela production process, reducing the environmental impact.

Abstract P194: Consumption of Added Sugar and Added Sugar-Rich Foods and Beverages is Associated With Accelerated Epigenetic Aging in the Coronary Artery Risk Development in Young Adults (CARDIA) Study

Background: Added sugar (AS) and AS-rich foods and beverages have shown unfavorable associations with overall and cardiovascular health; however, their associations with epigenetic age has not been studied. Aim: To examine the associations of AS intake and AS-rich carbohydrate (CHO) food score with the pace of epigenetic aging in the Coronary Artery Risk Development in Young Adults (CARDIA) study. Methods: There were 850 adults included in this cross-sectional study using data from Year 20 (2005-06). Trained interviewers administered a diet history, and foods were coded using Nutrition Data System for Research (NDSR), which outputs nutrients, including AS, and food groups. An AS-rich CHO food score was created including refined grain breads and rolls, quick breads, sweet bakery products, ready-to-eat cereals, candy, sugar products, and sugar-sweetened beverages. Year 20 epigenetic age measures were calculated from DNA methylation data, generating acceleration measures GrimAge acceleration (GrimAA) and PhenoAge acceleration (PhenoAA). Multivariable linear regression evaluated the associations of GrimAA and PhenoAA across quartiles of AS and AS-rich CHO food score, adjusted for demographic characteristics and lifestyle factors (see footnotes in table). Results: Participants who consumed more AS completed fewer years of education, were less likely to be current drinkers or smokers, and more likely to be ever smokers. They had lower intakes of total CHO, protein, total fat, and saturated fat, and fewer servings of vegetables, red and processed meat, eggs, and diet beverages. Consuming more AS was positively associated with PhenoAA (p trend =0.029), but not GrimAA (p trend =0.85). The AS-rich CHO food score was also positively associated with PhenoAA (p trend <0.001), but not GrimAA (p trend =0.14). Conclusions: Consuming greater amounts of AS and AS-rich CHO foods and beverages were associated with an increased risk for accelerated epigenetic aging.