Using ammonium‐tolerant yeast isolates: Candida halophila and Rhodotorula glutinis to treat high strength fermentative wastewater
Using ammonium‐tolerant yeast isolates: Candida halophila and Rhodotorula glutinis to treat high strength fermentative wastewater
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DOI：
10.1080/09593330309385571
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发表时间：
2003-03
影响因子：
2.8
通讯作者：
Q. Yang;Minghui Yang;L. Hei;S. Zheng
中科院分区：
文献类型：
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作者：
Q. Yang;Minghui Yang;L. Hei;S. Zheng
摘要从味精废水污染的污泥中分离到两株耐铵酵母菌，经鉴定分别为喜盐假丝酵母和红酵母。在批量和实验室规模条件下评估了两种酵母分离株对氨的耐受性及其化学需氧量（COD）去除性能。发现两种菌株的混合物在含有25%（NH3）2SO 4的人工培养基中生长良好，并且即使当NH 4 +-N和游离NH3-N的浓度分别高达18977和879 mg l−1时，也可以有效地去除谷氨酸废水中的COD。最初接种酵母混合物的固定床酵母反应器在近2个月的连续运行期间允许超过80%的恒定COD去除率，即使进水COD从8000 mg l− 1增加到25000 mg l−1。废水中含有超过4500 mg l-1的悬浮固体（SS），主要由酵母细胞组成，可以被认为是动物饲料添加剂的来源。通过活性污泥处理和混凝技术的组合工艺，可以将来自酵母反应器的流出物的残余COD进一步降低到500 mg l-1以下
Abstract Two ammonium‐tolerant yeast strains were isolated from sludge samples contaminated with monosodium glutamate manufacturing wastewater and were identified as Candida haplophila and Rhodotorula glutinis. The tolerance of the two yeast isolates to ammonia and their chemical oxygen demand (COD) removal performances were evaluated under batch and bench‐scale conditions. The mixture of the two isolates was found to grow well in an artificial medium containing 25% (NH,)2SO4 and could effectively remove COD from monosodium glutamate wastewater even when the concentrations of NH4 +‐N and free NH3‐N reached as high as 18977 and 879 mg l−1 respectively. A fixed‐bed yeast reactor, which was initially inoculated with the yeast mixture, permitted a constant COD removal rate of over 80% during a period of near 2‐month continuous running even when the influent COD was increased from 8000 to 25000 mg l−1. The effluent was accompanied with suspended solids (SS) of over 4500 mg l−1, which was mainly composed of yeast cells and could be considered as a source of animal forage additive. The residual COD of effluents from the yeast reactor could be further reduced to under 500 mg l−1 by a combination process of activated sludge treatment and coagulation technologies