Characteristics of a bioflocculant produced by Bacillus mucilaginosus and its use in starch wastewater treatment
Characteristics of a bioflocculant produced by Bacillus mucilaginosus and its use in starch wastewater treatment
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DOI：
10.1007/s00253-002-1159-5
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发表时间：
2003-01-01
影响因子：
5
通讯作者：
Luo, Q
中科院分区：
文献类型：
--
作者：
Deng, SB;Bai, RB;Luo, Q
从土壤样品中分离到一株微生物絮凝剂产生菌，经鉴定为胶质芽孢杆菌（Bacillusmucilaginosus），并对其产絮凝剂MBFA 9进行了研究。MBFA 9对高岭土悬浮液有较好的澄清能力，用量仅为0.1ml/l时，澄清率可达99.6%。发现MBFA 9的主要成分是主要由糖醛酸组成的多糖（19.1%）。中性糖（47.4%）和氨基糖（2.7%）。红外光谱分析表明，微生物絮凝剂中存在羧基和羟基。MBFA 9无毒，可用于食品工业中的悬浮固体（SS）回收。MBFA 9处理淀粉废水时，在Ca ~（2+）存在下，大大加快了絮凝体的形成和有机颗粒的沉降。沉降5 min后，SS和化学需氧量的去除率分别达到85.5%和68.5%，优于传统化学絮凝剂。
A bioflocculant, MBFA9, was produced from a strain of bioflocculant-producing bacteria isolated from a soil sample and identified as Bacillus mucilaginosus. MBFA9 had a good flocculating capability and could achieve a flocculating rate of 99.6% for kaolin suspension at a dosage of only 0.1 ml/l. The major component of MBFA9 was found to be polysaccharide composed mainly of uronic acid (19.1%). neutral sugar (47.4%) and amino sugar (2.7%). Infrared spectrum analysis showed the presence of carboxyl and hydroxyl groups in the bioflocculant. MBFA9 is nontoxic and can be used in food industries for suspended solids (SS) recovery. When applied to starch wastewater treatment, MBFA9 greatly accelerated the formation of floes and the settling of organic particles in the presence of Ca2+ salt. After 5 min of settling, the removal rate of SS and chemical oxygen demand were up to 85.5% and 68.5%, respectively, which is better than traditional chemical flocculants.