Enhancing biomethane yield from food waste through surfactant-assisted mechanical pretreatment: An optimization approach

IF 1.9 4区工程技术 Q4 ENERGY & FUELS

Journal of Renewable and Sustainable Energy Pub Date : 2024-07-01 DOI:10.1063/5.0207515

M. C. Eniyan, M. Edwin, J. R. Banu

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Abstract

In the present investigation, the response surface methodology-based central composite design (RSM-CCD) was used to model the potential of improving the solubilization of food waste through surfactant-assisted homogenization pretreatment (SAHP). RSM-CCD models were investigated based on homogenization speed and time for HP, surfactant dosage, and homogenization time at optimized homogenization speed by HP for SAHP input parameters and chemical oxygen demand (COD) solubilization (CODsol) as response parameters. HP optimum condition was 7020 rpm, 9.9 min to attain 11.6% solubilization with 292.8 kJ/kg total solid (TS) specific energy consumption (ESp). On the other hand, 19.9% CODsol was obtained in the SAHP under optimum conditions of 6.3 μl and 3.7 min, with ESp of 116.2 kJ/kg TS, respectively. The CODsol increment and ESp decrease by 176.2 kJ/kg TS indicate the significance of combined pretreatment and synergistic action of surfactant. Eventually, the maximum biomethane generation was found in SAHP as 67 ml/gCOD, higher than that of HP (40 ml/gCOD) and without pretreatment samples (17 ml/gCOD), respectively.

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通过表面活性剂辅助机械预处理提高厨余生物甲烷产量：优化方法

本研究采用基于响应面方法学的中央复合设计（RSM-CCD）来模拟通过表面活性剂辅助均质预处理（SAHP）提高厨余溶解度的潜力。RSM-CCD 模型以 HP 的均质化速度和时间、表面活性剂用量和 HP 优化均质化速度下的均质化时间为 SAHP 输入参数，以化学需氧量（COD）溶解度（CODsol）为响应参数进行了研究。HP 的最佳条件为 7020 转/分、9.9 分钟，以 292.8 千焦/千克总固体（TS）的比能耗（ESp）达到 11.6% 的增溶率。另一方面，在 6.3 μl 和 3.7 分钟的最佳条件下，SAHP 可获得 19.9% 的 CODsol，ESp 分别为 116.2 kJ/kg TS。CODsol 增加和 ESp 降低 176.2 kJ/kg TS 表明了联合预处理和表面活性剂协同作用的重要性。最终，SAHP 的生物甲烷生成量最大，达到 67 毫升/克 COD，分别高于 HP 样品（40 毫升/克 COD）和未经预处理的样品（17 毫升/克 COD）。

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来源期刊

Journal of Renewable and Sustainable Energy ENERGY & FUELS-ENERGY & FUELS

CiteScore

4.30

自引率

12.00%

发文量

122

审稿时长

4.2 months

期刊介绍： The Journal of Renewable and Sustainable Energy (JRSE) is an interdisciplinary, peer-reviewed journal covering all areas of renewable and sustainable energy relevant to the physical science and engineering communities. The interdisciplinary approach of the publication ensures that the editors draw from researchers worldwide in a diverse range of fields. Topics covered include: Renewable energy economics and policy Renewable energy resource assessment Solar energy: photovoltaics, solar thermal energy, solar energy for fuels Wind energy: wind farms, rotors and blades, on- and offshore wind conditions, aerodynamics, fluid dynamics Bioenergy: biofuels, biomass conversion, artificial photosynthesis Distributed energy generation: rooftop PV, distributed fuel cells, distributed wind, micro-hydrogen power generation Power distribution & systems modeling: power electronics and controls, smart grid Energy efficient buildings: smart windows, PV, wind, power management Energy conversion: flexoelectric, piezoelectric, thermoelectric, other technologies Energy storage: batteries, supercapacitors, hydrogen storage, other fuels Fuel cells: proton exchange membrane cells, solid oxide cells, hybrid fuel cells, other Marine and hydroelectric energy: dams, tides, waves, other Transportation: alternative vehicle technologies, plug-in technologies, other Geothermal energy