产毒微囊藻藻粉的脱毒技术研究

为了达到对收获的微囊藻藻粉安全脱毒的目的 ,分别使用了调节pH ,NaClO处理和臭氧处理微囊藻干粉 ,并检测其脱毒效果和脱毒过程中蛋白质的损失率 ,以期找到一种可行的微囊藻藻粉安全脱毒方法。研究结果表明 ,调节pH值的方法试剂用量大且脱毒不彻底 ;NaClO处理也因对藻粉的渗透性较差而效果不佳。臭氧水溶液处理藻粉 ,处理时间短 ,且脱毒彻底 ,有实际应用前景

STUDIES ON DETOXIFICATION TECHNIQUES OF TOXIC ALGAL POWDER OF MICROCYSTIS

The harmful algal blooms(HABs)continually occurred in Dianchi Lake in recent years, and the harmful microcystis aeruginosa is the dominant species. In the project on the control of HABs in Dianchi Lake, gathering the microcystis with machine is now used on a large scale. The bloom of Microcystis has high protein content and a big amount of biomass, and it can be used as the raw material of fertilizer in the agricultural production. Since microcystins produced by Microcystis are very difficult to degrade, the utilization of the raw materials is restricted. Furthermore, if the removal or degradation of microcystins can't be carried out in time, the possible risk of microcystins to environment will inevitable. Thus the detoxication and safe treatment of microcystis powder is necessary. In order to detoxicate the algal powder of Microcystis harvested from Dianchi Lake, three methods, the pH value adjustment, NaClO treatment and O 3 treatment, were applied to deal with the algal powder. We measured the effect of detoxification and the loss of protein after the treatments. The result showed that the former two methods(the pH value adjustment and NaClO treatment) didn't work well. With pH adjustment, the detoxication rate of the algal powder was 50%-66%, while it was 77% when NaClO treatment was used. The disadvantage of this method is that the application of a big amount of chemicals will cause environmental pollution. However, when 150mg/g of O 3 was applied for per gram of dry algal powder, we found that it can detoxificate the algal powder in a short time and have a good effect. So, this method has a good prospect in practice.