Sodium dodecyl sulfate improves the treatment of waste paper with rumen fluid at lower concentration but decreases at higher condition
Sodium dodecyl sulfate improves the treatment of waste paper with rumen fluid at lower concentration but decreases at higher condition
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十二烷基硫酸钠在较低浓度下可改善瘤胃液对废纸的处理效果，但在较高浓度下会降低
DOI：
10.1007/s10163-019-00957-8
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发表时间：
2020
影响因子：
3.1
通讯作者：
Nakai Yutaka
中科院分区：
文献类型：
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作者：
Takizawa Shuhei;Baba Yasunori;Tada Chika;Fukuda Yasuhiro;Nakai Yutaka
已经将瘤胃流体应用于木质纤维素生物质消化以产生甲烷，并且已经显示各种饲料补充剂改善反刍动物对木质纤维素生物质的消化。因此，我们研究了十二烷基硫酸钠（SDS）对木质纤维素生物质的瘤胃液预处理和随后的甲烷发酵的影响。将SDS与瘤胃液以0.1、0.2、0.4和0.8 g/L的浓度混合。添加SDS后，在37 °C下用瘤胃液预处理废纸6 h。SDS的添加减少了预处理后存活的瘤胃纤毛虫的数量。SDS的加入增加了预处理过程中的溶解化学需氧量，但SDS的加入并没有增加挥发性脂肪酸的浓度。预处理后，预处理的废纸在35 °C下进行分批甲烷发酵45天。添加0.1和0.2 g/L的SDS可缩短废纸的消化时间，提高甲烷气体的产率。而添加0.4和0.8g/L的SDS则显著抑制了废纸的甲烷生成。这些结果表明，低浓度的SDS可以提高瘤胃液预处理木质纤维素生物质的效率，并可以提高废纸的甲烷产量。
Rumen fluid has been applied to lignocellulosic biomass digest for methane production, and various feed supplements have been shown to improve ruminant digestion of lignocellulosic biomass. Therefore, we investigated the effects of sodium dodecyl sulfate (SDS) on the pretreatment of lignocellulosic biomass with rumen fluid and subsequent methane fermentation. SDS was mixed with rumen fluid at concentrations of 0.1, 0.2, 0.4, and 0.8 g/L. After SDS addition, the waste paper was pretreated with rumen fluid at 37 °C for 6 h. SDS addition decreased the number of surviving rumen ciliates after pretreatment. SDS addition increased the dissolved chemical oxygen demand during pretreatment; however, SDS addition did not increase the volatile fatty acid concentration. After pretreatment, batch methane fermentation of pretreated waste paper was performed at 35 °C for 45 days. SDS addition at 0.1 and 0.2 g/L shortened the waste paper digestion time and enhanced methane gas production compared to the control. By contrast, SDS addition at 0.4 and 0.8 g/L remarkably inhibited methane production from waste paper. These findings suggest that low concentrations of SDS can improve the efficiency of lignocellulosic biomass pretreatment with rumen fluid, and can enhance methane production from waste paper.