利用市政污水培养Chlorella vulgaris生产生物柴油

为了考察利用南昌市政污水规模化培养富油微藻生产生物柴油,同时达到净化污水的目的,取南昌市青山湖污水处理厂未经任何处理的市政污水作为普通小球藻(Chlorella vulgaris)生长的培养液。监测了C.vulgaris在市政污水中连续培养10 d的特定生长率、生物质产量以及与之相关的市政污水中氨氮(NH4+-N)、总磷(TP)、化学需氧量(COD)、总悬浮固体(TSS)和挥发性悬浮固体(VSS)的清除情况。实验表明:营养物质的水平显著地影响了C.vulgaris的生长。C.vulgaris的生长率在培养8 d后达到最大,OD680为2.856,总的生物质产量日均最大积累速率为0.01 g/L,油脂含量为干质量的18%,油脂的平均日产量为0.001 g/L。培养10 d内NH4+-N、TP和COD的去除率分别为50.0%、32.1%和26.0%,TSS和VSS的日平均去除速率分别为0.01 g/L和0.006 1 g/L。

Cultivating Chlorella vulgaris as biodiesel feedstock by municipal wastewater

The technical feasibility by Nanchang municipal wastewater of Nanchang City was used as culture media for large-scale cultivation of oil-rich microalgae as biodiesel feedstock and treating the wastewater simultaneausly.Collecting the municipal wastewater without any treatment from Qingshanhu sewage plant as the culture medium for Chlorella vulgaris growth.The experiment monitored the specific growth rate and biomass yield of C.vulgaris and associated ammonia nitrogen,phosphorous,COD,TSS,and VSS removal during 10 days.The experimental results showed that the level of nutrients influenced algae growth significantly.The growth rate of C.vulgaris reached a maximum of OD680 2.856 after 8 days culturing and the algae biomass accumulation rate reached a maximum of 0.01 g/L per day.The oil content of C.vulgaris was 180 mg/g in dry biomass weight and the oil average daily production was 0.001 g/L per day.The removel rate of NH＋4-N,TP and COD were 50.0%,32.1% and 26.0%.The TSS and VSS removal rates were 0.01 mg/L per day and 0.006 1 mg/L per day,respectively.