摘要
互花米草是一种分布在潮间带的耐盐耐淹的优势高等植物,具有很高的生产力,每年高达3154.8g·dw·m-2以上,作为外来物种其生态入侵问题受到了广泛关注。为了对其进行资源化利用,采用35℃批量发酵的方式,研究了6%、10%和15%3个总固体(TS)浓度条件下其厌氧发酵产气特性,并且在TS浓度均设定为6%条件下,开展了辐照剂量为5kGy时γ-射线辐照预处理对其厌氧发酵产气效果的影响试验,以及互花米草与土豆按4∶1和6∶1(以TS计)配比时混合厌氧发酵试验。结果表明,3个TS浓度水平下互花米草都可以顺利进行厌氧发酵,γ-射线辐照处理使互花米草厌氧发酵累积产气量提高了9.1%,4∶1和6∶1的混合原料以及互花米草的产气率分别为293.4、263.4、228.9mL·g-1TS。
Smooth cordgrass （Spartina alterniflora）, a salt-marsh plant distributing in intertidal flats with annual production as high as 3 154.8 g·dw·m^-2, has received great attention due to its ecological invasion. The purposes of this study were to evaluate anaerobic digestibility and biogas yields of S. alterniflora using batch anaerobic digestion experiments performed at 35 ℃ at total solids （TS） of 6%, 10% and 15%, respectively, and to evaluate the effects of γ-ray irradiation pretreatment at dose of 5 kGy and co-digestion with S. alterniflora and potato on promoting anaerobic digestion efficiency of S. alterniflora by batch anaerobic digestion experiments performed at 35 ℃ at the constant TS of 6%. The cumulative biogas yields of 228.9, 177.4 and 155.3 mL·g^-1 TS were achieved after 33 days of digestion at 6%, 10% and 15% of TS, respectively. The cumulative biogas yield of S.alterniflora pretreated by T-ray irradiation reached 249.9 mL· g^-1 TS, which increased by 9.1% than that of the control with 228.9 mL·g^-1 TS. Furthermore, the cumulative biogas yields of co-digestion at S. alterniflora to potato ratios of 4：1 and 6：1 （on TS basis） reached 293.4 and 263.4 mL·g^-1TS, respectively, which increased by 28.2% and 15.1% than that of the control. The results indicate that S. alterniflora can he transformed into clean energy by anaerobic digestion and both T-ray irradiation pretreatment and codigestion with potato can promote the anaerobic digestibility orS. alterniflora.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第3期1254-1258,共5页
Journal of Agro-Environment Science
基金
中国博士后科学基金(20060400277)
江苏省博士后科研资助计划(0602016B)
关键词
互花米草
厌氧发酵
γ-射线辐照预处理
混合发酵
Spartina alterniflora
anaerobic digestion
T-ray irradiation pretreatment
co-digestion
