蓝藻厌氧发酵产甲烷是蓝藻资源化利用的一种有效方式,但是碳氮比偏低、所产生沼气的提纯都是蓝藻发酵产沼气应用的难点。小规模研究了蓝藻与秸秆、厌氧污泥在不同配比的条件下产甲烷的能力以及所产沼气中含硫气体的浓度特征。实验与分析结果显示,蓝藻∶秸秆∶接种污泥的质量比为8∶2∶1时,系统累计产甲烷量最高,产率为176 m L/g(VS);系统所产沼气中含有多种含硫气体,以硫化氢(H2S)为主,在50 d监测过程中最高达到14016.12μL/L;H2S与甲硫醇(CH4S)、甲硫醚(C2H6S)、二甲基二硫醚(C2H6S2)、二甲基三硫醚(C2H6S3)等含硫气体含量显著正相关,显示H2S和其他几种含硫气体浓度变化具有较高的一致性。
[Objective] To study the characteristics and effects of inorganic nitrogen in east water-source and inflow rivers of Chaohu Lake. [Method] The speciation and distribution characteristics of dissolvable inorganic nitrogen （DIN） in east water-source and inflow rivers of Chaohu Lake were investigated, and their effects on water qual- ity were examined. [Result] The concentrations of NH3-N and NO2--N were the high in flood season, and low in non-flood season, while the concentration of NO3--N pre- sented the opposite trend; the concentration of NO3--N was the highest in Shuangqiao estuary, where the pollution was the worst. DIN in Zhegao estuary and Xiaozhegao estuary was mainly caused by domestic sewage and industrial wastewaters; surface runoff and pollution from ships contribute the most to the DIN content in Shuangqiao estuary. [Conclusion] This study provided basic data and theoretical basis for the control and management of eutrophication in Chaohu Lake.
