利用餐厨中水培养钝顶螺旋藻

Feasibility of Spirulina platensis growth in food reclaimed water

为了降低钝顶螺旋藻的培养成本,采用经厌氧-好氧技术处理后的餐厨垃圾中水,进行了钝顶螺旋藻培养实验,研究了利用经技术处理后的餐厨中水培养高价值钝顶螺旋藻的可行性。结果表明:在批次培养实验中,餐厨中水经过合适的稀释倍数后能够实现钝顶螺旋藻的培养,当餐厨中水稀释6倍灭菌培养时可获得最大生物量为1.314 g·L^(-1),且餐厨中水灭菌与否对钝顶螺旋藻培养无明显生物量差异;光生物反应器培养实验中,钝顶螺旋藻在稀释6倍且未经过灭菌的餐厨中水中可正常生长繁殖,获得的最大生物量为1.129 g·L^(-1)。在实验培养过程中,培养液pH值维持在9.0~9.3,DO值为7.0~8.6 mg·L^(-1);培养周期结束时,培养液中氨氮被全部利用,总氮(TN)和总磷(TP)分别利用了24.401和0.957 mg·L^(-1)。

To reduce costs in the Spirulina platensis culture process,reclaimed water from an anaerobic-aerobic treatment process was used for culturing Spirulina platensis,and its feasibility for cultivating high-value Spirulina platensis was examined. Results showed that the reclaimed water was successfully used to culture Spirulina platensis after suitable dilution in the batch experiments. The highest biomass production（ 1. 314 g·L^-1） was obtained when the dilution ratio was 6-fold. No significant difference in biomass production was observed,regardless of whether the reclaimed water was sterilized or not. Further,when used in the photobioreactor（ PBR）,the6-fold diluted and non-sterilized reclaimed water fostered regular growth of Spirulina platensis and achieved the highest biomass production of 1. 129 g·L^-1. In the process,the pH value ranged from 9. 0 to 9. 3,and the DO value fluctuated between 7. 0 and 8. 6 mg·L^-1. At the end of one culture cycle,the ammonia nitrogen in the culture medium was completely utilized,whereas the total nitrogen（ TN） and total phosphorus（ TP） consumed were 24. 401 mg·L^-1and 0. 957 mg·L^-1,respectively.