Composition of intake sugars and emission of gases from paper sludges by Coptotermes formosanus Shiraki
Composition of intake sugars and emission of gases from paper sludges by Coptotermes formosanus Shiraki
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DOI：
10.1080/09593330903453269
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发表时间：
2012-01
影响因子：
2.8
通讯作者：
R. Kaneko;Kunihisa Ohkubo;A. Nakagawa-izumi;S. Doi
中科院分区：
文献类型：
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作者：
R. Kaneko;Kunihisa Ohkubo;A. Nakagawa-izumi;S. Doi
造纸污泥是制浆过程的副产品，被填埋或焚烧处理。在本研究中，我们研究了台湾乳白蚁在两种污泥中对碳水化合物的摄取和消化率：化学制浆厂的污泥C和机械制浆厂的污泥M。利用白蚁进行了三周的非选择性试验，结果表明，污泥C的质量损失显著高于漂白纸浆和红松木的对照样品。认为当纸浆或木材白蚁摄取相同数量的碳水化合物时，污泥C的无机物含量越高，其质量损失就越大。虽然污泥M的无机含量与污泥C几乎相同，但污泥M中木质素含量越高，质量损失越小。对白蚁粪便中糖组成的分析表明，污泥C中约73%的葡萄糖和81%的木糖被消化。结果表明，这些糖在污泥C中的消化率与对照样品相同，但含有大量的无机物。然而，在非选择性实验中，投喂污泥的白蚁的氢转化率低于投喂浆的白蚁：污泥和果肉中的1摩尔葡萄糖分别转化为0.51和0.80摩尔的氢。
Paper sludge is a by-product of the pulping process and is landfilled or incinerated for disposal. In this study, we evaluated ingestion and digestibility of carbohydrates, by the termite Coptotermes formosanus, in two kinds of sludges: sludge C from the chemical pulp mill and sludge M from the mechanical pulp mill. The no-choice tests using the termite for three weeks showed that the mass loss of sludge C was significantly higher than that of the control samples: a bleached pulp and red pine wood. It is considered that the higher inorganic content of sludge C resulted in the higher mass loss when the same amount of carbohydrates was taken by the pulp- or wood-fed termite. Although the inorganic content of sludge M was almost the same as that of sludge C, the higher lignin content in sludge M is thought to have resulted in the lower mass loss. Analysis of sugar composition in the faecal materials of the termite showed that about 73% of glucose and 81% of xylose in sludge C were digested. It was concluded that the digestibility of these sugars in sludge C was the same as that of the control samples despite containing high amounts of inorganic compounds. However, the hydrogen conversion rate by the termites that were fed sludge was lower than that of the termites that were fed pulp in the no-choice test for three days: one mole of glucose from the sludge and pulp was converted to 0.51 and 0.80 moles of hydrogen, respectively.