The present study employed biochar in three different particle sizes (<2 mm, 2–5 mm, >5 mm) to reduce the anaerobic recalcitrance of distillery wastewater in anaerobic bioreactors and compared it to the conventional buffering agent, CaCO3. Experimental results revealed that the biochar particles larger than 5 mm achieved the highest specific methane yield (268 ml/g COD) and average productivity (423 mL/L/d) at an organic loading rate of 1.57 g COD/L/d. A detailed techno-economic analysis indicated that using biochar could yield a net present value of €769,564 and an 18% internal rate of return for large-scale distillery wastewater treatment, though there is a 48% risk of financial loss. This risk can be mitigated with a 1–3% annual increase in electricity, heat, and fertiliser sales price.

中文翻译：

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酿酒废水脱碳处理：生物炭辅助厌氧转化的实验研究和财务评估


本研究采用三种不同粒径（<2 mm、2-5 mm、>5 mm）的生物炭来降低厌氧生物反应器中酿酒废水的厌氧顽抗性，并将其与传统缓冲剂 CaCO3 进行比较。实验结果表明，大于5 mm的生物炭颗粒在有机负荷率为1.57 g COD/L/d时实现了最高的比甲烷产率（268 ml/g COD）和平均生产率（423 mL/L/d）。详细的技术经济分析表明，使用生物炭可以产生 769,564 欧元的净现值和 18% 的大规模酿酒废水处理内部回报率，尽管存在 48% 的财务损失风险。通过每年提高电力、热力和化肥销售价格 1-3% 可以减轻这种风险。