Rice spirit-based (RSB) products, such as rice wine, are commonly used in several Asian cuisines. While RSB can be enriched with phenolic compounds (e.g., through extraction from oak barrel) to develop a healthier product with a new flavor, such a process is expected to be time-consuming. At the same time, the culinary and adult beverage industry demands approaches for developing innovative products based on affordable alternatives to barley. Therefore, an ultrasound-based system was set up in a 10-L oak barrel to develop a new RSB product that referred to as "Mhiskey" in this study. The system was run at 0, 275, and 550 W, and changes in total phenolics, color values (L*, a*, b*, color intensity, and overall color changes), pH, and degrees Brix were studied during the extraction process. According to the results, this system reduced the extraction time, enhanced the total phenolic compounds, and produced a Mhiskey with similar physical properties to those of the conventional method.Increasing sonication power reduced the extraction time significantly but did not affect the specific energy consumption. In terms of total phenolics, the final products had up to 162 mg GAE per L sample. This new system is scalable and can be implemented in the industry after further economic and technical evaluations. Furthermore, the product developed in the present study might be evaluated for commercialization (e.g., for culinary purposes) after sensory and market research. Practical applicationsThis study proposed a new extraction system based on ultrasound technology that can be used to process rice spirit-based (RSB). The system is scalable and can be adopted in the industry to reduce the processing time which can provide benefits for wineries. Also, the energy consumption can be reduced by optimizing the processing parameters. The technical information reported in this work can also be used as a base for process optimization at an industrial scale. At the same time, the final product of this process, that is, Mhiskey, has the potential to be sold in the market at a competitive price. | INTRODUCTIONAlcoholic ingredients and drinks can be considered significant economic assets around the world (Eriksson,

In this study, an ohmic extractor system was designed and developed, and system performance was compared with the conventional method for the extraction of bioactive compounds from pineapple peels. Besides, the Taguchi approach was used to find the optimal processing conditions. Dependent parameters were voltage, frequency, and electrode surface area. Independent parameters include come-up time, heating rate, energy consumption, specific energy consumption, and total phenolics. The highest heating rate was 13 C min À1 which showed that optimal processing conditions can reduce the come-up time by eight folds. Also, the optimized ohmic system had a higher heating rate in comparison with the conventional method (13 vs. 9 C min À1 ). Besides, it was revealed that changing the processing parameters in the range explored in the present study can save up to 33% of total energy consumption.Furthermore, the ohmic system saved a substantial amount of energy (up to 55%) in comparison with the conventional process while enhancing the total phenolics to achieve up to 89.25 mg GAE per 100 g FW of total phenolic compounds [Correction added on 16 November, after first online publication: The word "by 12.6%" has been removed from the preceding sentence to improve clarity.]. Therefore, this extraction approach can provide profit to farmers and food factories and contribute to achieving sustainable development goals by reducing energy consumption and enhancing resource efficiency through the efficient valorization of agricultural by-products such as pineapple peels. Practical ApplicationsThe ohmic extraction system, which was designed and developed in this study, is scalable and affordable. It can help farmers and food factories to enhance their profit through the valorization of their production by-products. Besides, using fruit byproducts (e.g., pineapple peels) as raw materials for extraction can cut the expenses required for sample preparation, which can be regarded as an approach for relatively low-cost extraction of phenolic compounds in the ohmic systems. Furthermore, the innovative valorization platform proposed in this study showed to be time-and

Pineapple core is considered a processing by-product. This study proposed and evaluated an ohmic heating extraction-based valorization platform to obtain value-added bioactive compounds from pineapple core and studied the effects of four important processing parameters. In this sense, a Taguchi design (L16(4)4) was used to assess the effects of temperature (70, 80, 90, and 100 °C), time (15, 30, 45, and 60 min), voltage (110, 160, 210, and 260 V), and frequency (60, 340, 620, and 900 Hz) on heating rate, come-up time, energy consumption, system performance efficiency, total phenolic compounds (TPC), DPPH, and ABTS. Finally, a side-by-side comparison of optimized ohmic heating (OOH) and conventional extraction was performed, and chemical composition was compared by ultra-performance liquid chromatography equipped with photodiode array detection-mass (UPLC-DAD-ESI-MS-MS). According to the results, increasing temperatures enhanced system performance efficiency but negatively affected TPC and antioxidant values above 90 ℃. Similarly, prolonging the extraction (>30 min) decreased TPC. Further, increasing voltage (from 110 to 260 V) shortened the come-up time (from 35.75 to 5.16 min) and increased the heating rate (from 2.71 to 18.80 °C/min−1). The optimal conditions were 30 min of extraction at 80 °C, 160 V, and 900 Hz. Verification of the optimal conditions revealed that OOH yielded an extract with valuable bioactive compounds and saved 50% of the time and 80% of energy compared to the conventional treatment. The UPLC-DAD-ESI-MS-MS showed that there were similarities between the chemical profiles of the extracts obtained by conventional and OOH methods, while the concentration of major compounds varied depending on the extraction method. This information can help achieve sustainable development goals (SDGs) by maximizing the yield and minimizing energy and time consumption.