Department of Industrial Biotechnology, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Indian Institute of Technology (BHU), Varanasi 221005, India; Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, HI 96822, USA.
Bioresour Technol. 2017 Jun;234:115-121. doi: 10.1016/j.biortech.2017.03.009. Epub 2017 Mar 4.
Removal of hydrogen sulfide (HS) from biogas was investigated in a biochar column integrated with a bench-scale continuous-stirred tank reactor (CSTR) treating sulfate-laden wastewater. Synthetic wastewater containing sulfate concentrations of 200-2000mg SO/L was used as substrate, and the CSTR was operated at an organic loading rate of 1.5g chemical oxygen demand (COD)/L·day and a hydraulic retention time (HRT) of 20days. The biochar was able to remove about 98.0 (±1.2)% of HS for the ranges of concentrations from 105-1020ppmv, especially at high moisture content (80-85%). Very high HS adsorption capacity (up to 273.2±1.9mg HS/g) of biochar is expected to enhance the HS oxidation into S and sulfate. These findings bring a potentially novel application of sulfur-rich biochar as a source of sulfur, an essential but often deficient micro-nutrient in soils.
研究了在一个集成有批式连续搅拌槽式反应器（CSTR）的生物炭柱中从沼气中去除硫化氢（HS），该 CSTR 用于处理含硫酸盐的废水。使用含有硫酸盐浓度为 200-2000mg SO/L 的合成废水作为底物，CSTR 的有机负荷率为 1.5g 化学需氧量（COD）/L·天，水力停留时间（HRT）为 20 天。生物炭能够去除浓度范围为 105-1020ppmv 的约 98.0（±1.2）%的 HS，尤其是在高湿度（80-85%）下。生物炭具有非常高的 HS 吸附能力（高达 273.2±1.9mg HS/g），有望促进 HS 氧化成 S 和硫酸盐。这些发现为富含硫的生物炭作为土壤中必需但往往缺乏的微量营养素来源带来了一种潜在的新应用。
