Choudhury Abhinav, Lansing Stephanie
University of Maryland, Department of Environmental Science and Technology, USA.
University of Maryland, Department of Environmental Science and Technology, USA.
Bioresour Technol. 2020 Jun;306:123121. doi: 10.1016/j.biortech.2020.123121. Epub 2020 Mar 3.
Corn stover biochar (CSB) and maple biochar (MB) were added into anaerobic digesters and evaluated for hydrogen sulfide (HS) reductions. This was the first study to show Fe-impregnated biochar can eliminate HS production. The novel study evaluated biochar addition on HS reduction and nutrient concentrations using three experiments to test the effect of: 1) biochar concentration, 2) biochar particle size, and 3) Fe-impregnated biochar using triplicate lab-scale reactors. At the highest biochar dose (1.82 g biochar/g manure TS), HS production was 90.5% less than the control treatment (351 mL HS/kg VS). Biochar particle size did not significantly affect HS concentration. The Fe-impregnated biochar (0.5 g biochar/g manure TS) reactors had no HS detected in the CSB-Fe system. Methane (CH) in the biochar and control treatments were not significantly different in all three experiments. The results show that biochar added to digesters can significantly reduce HS production without affecting CH production.
将玉米秸秆生物炭（CSB）和枫木生物炭（MB）添加到厌氧消化池中，并评估其对硫化氢（HS）减排的效果。这是第一项表明铁浸渍生物炭可消除HS产生的研究。这项新研究使用三个实验评估了生物炭添加对HS减排和养分浓度的影响，以测试以下因素的作用：1）生物炭浓度，2）生物炭粒径，以及3）使用一式三份的实验室规模反应器的铁浸渍生物炭。在最高生物炭剂量（1.82克生物炭/克粪便总固体）下，HS产量比对照处理（351毫升HS/千克挥发性固体）减少了90.5%。生物炭粒径对HS浓度没有显著影响。在CSB-Fe系统中，铁浸渍生物炭（0.5克生物炭/克粪便总固体）反应器未检测到HS。在所有三个实验中，生物炭处理和对照处理中的甲烷（CH）没有显著差异。结果表明，添加到消化池中的生物炭可显著减少HS产生，而不影响CH产生。
