混培养系统中菌藻共生关系及其对污水处理效果的影响

The Interactions of Algal-Bacterial Symbiotic System and Its Effects on Wastewater Treatment

摘要: 菌藻共生系统在污水处理领域已有一定的研究及应用，但菌藻关系在此过程中的变化规律尚不明确。本文用普通小球藻与枯草芽孢杆菌构建菌藻共生系统，研究系统中菌藻接种量、投加次序等对菌藻数量变化关系的影响并对自配污水中的污染物去除效果进行匹配。试验结果表明，菌藻比及投加量对于菌藻生长规律有显著影响。通过海藻酸钠同步包埋固定的菌藻共生系统达到较优的共生关系(菌0.5 g/L，藻0.125 g/L)时，对COD、氨氮和总磷的去除率分别达到99.2%、92.2%和73.1%。

Abstract: The algal-bacterial symbiotic system has been studied and applied in the field of wastewater treatment, but it is not clear how the relationship between the algae and bacteria changes in this process. In this paper, the algal-bacterial symbiotic system was constructed with Chlorella vulgaris and Bacillus subtilis. The influence of the quantity and order of algae and bacteria to the change of bacteria and algae were studied, to match the effect of pollutant removal. The experimental results indicated that the algae-bacteria ratio and initial concentration have significant effects on the growth of algae-bacteria. The removal rates of COD, ammonia nitrogen and total phosphorus were 99.2%, 92.2% and 73.1%, respectively, when fixed algal-bacterial symbiotic system were formed (bacteria 0.5 g/L, algae 0.125 g/L).