Reutilization of environmental pollutants in Southeast Asia

该项目的目标是改进适用于东南亚发展中国家的环保新技术。由于泰国是该地区最大的发展中国家之一，因此对其环境条件进行了研究。此外，在泰国收集了有用的生物资源。使用这些生物，环境污染物的处理和生物质的再利用的技术进行了研究如下。镉的去除进行了研究，使用丝状蓝藻，Tolypothrix tenuis，表现出高水平的镉耐受性，并具有最高的镉去除能力在17个蓝藻菌株在泰国获得。T.tenuis在较宽的温度和pH值范围内对Cd的吸附能力一致，表明T.tenuis在某些室外条件下可用于去除地表水和地下水中的Cd ...更多信息 嗜藻，拟色球藻属菌株TS-821。通过改变CO_2浓度、光照强度和组分含量，确定了该菌株的高密度培养条件。测定细胞内蛋白质、糖和脂质的含量。从冷冻干燥的藻细胞洗涤液中提取藻蓝蛋白，并利用从池塘中分离的絮凝藻垫对废水进行同步脱氮除磷研究。在稀释率为1.0 d ~（-1）的连续培养中，采用细胞循环系统，成功地去除了废水中的磷和氮<-1>。为了评价曼谷的水环境污染状况，在湄南河和工厂附近的运河中，对几种淡水鱼肝脏金属硫蛋白（MT）的诱导进行了研究。湄南河中的鲶鱼和吸盘鱼以及运河中的普通攀鲈和三斑攀鲈显示出相对较高的肝脏MT水平，表明环境发生了一些恶化。少

The objective of this project is to improve the new technology for environmental protection, which is suitable for the developing countries in the Southeast Asia. As Thailand is one of most developing countries in the area, the environmental condition was searched. In addition, the useful biological resources are collected in Thailand. Using these organisms, the technology for treatment of environmental pollutant and reuse of biomass are investigated as follows.Cadmium removal was investigated using the filamentous cyanobacterium, Tolypothrix tenuis, which exhibited a high level of Cd tolerance and had the highest Cd removal ability among 17 cyanobacterial strains obtained in Thailand. T.tenuis showed consistent Cd-adsorption ability over a wide range of temperature and pH.These results suggest that T.tenuis may be applicable to the removal of Cd from surface and ground water in certain outdoor situations.Efficient conversion of CO_2 into organic material was attempted by using a therm … More ophilic algae, Chroococcidiopsis sp.strain TS-821. Condition for dense culture of the strain was determined by changing CO_2 concentration, light intensity and the amount of components. Content of protein, sugar, and lipid in the cells was also measured. Phycocyanin was purified from the washings of freeze-dried cells.Simultaneous removal of phosphorus and nitrogen from wastewater was studied utilizing a flocculated algal mat that had been isolated from a pond. The removal of phosphorus and nitrogen in wastewater was successful in a continuous culture with cell recycle system at a dilution rate of 1.0 d^<-1>. After a 4 week adaptation period, the system arrived in steady state and the removal rates of phosphorus and nitrogen were about 70% and 50%, respectively.To evaluate aquatic environmental pollutions in Bangkok, hepatic Metallothionein (MT) induction was evaluated in several kinds of fresh-water fishes in Chao Phraya river and in canals around the factories. Catfish and sucker in Chao Phraya river and common climbing perch and three spot gourami in canals showed relatively high levels of hepatic MT,indicating some environmental changes to the worse. Less