State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
J Hazard Mater. 2010 Jun 15;178(1-3):35-41. doi: 10.1016/j.jhazmat.2010.01.039. Epub 2010 Jan 15.
Biological removal of sulfide, nitrate and chemical oxygen demand (COD) simultaneously from industrial wastewaters to elementary sulfur (S(0)), N(2), and CO(2), or named the denitrifying sulfide (DSR) process, is a cost effective and environmentally friendly treatment process for high strength sulfide and nitrate laden organic wastewater. Kinetic model for the DSR process was established for the first time on the basis of Activated Sludge Model No. 1 (ASM1). The DSR experiments were conducted at influent sulfide concentrations of 200-800 mg/L, whose results calibrate the model parameters. The model correlates well with the DSR process dynamics. By introducing the switch function and the inhibition function, the competition between autotrophic and heterotrophic denitrifiers is quantitatively described and the degree of inhibition of sulfide on heterotrophic denitrifiers is realized. The model output indicates that the DSR reactor can work well at 0.5<C/S<3.0 with influent sulfide concentration of 400-1000 mg/L. At >1000 mg/L influent sulfide, however, the DSR system will break down.
从工业废水中同时去除硫化物、硝酸盐和化学需氧量 (COD)，生成单质硫 (S(0))、氮气 (N(2)) 和二氧化碳 (CO(2))，这种被称为反硝化除硫 (DSR) 的工艺，是一种针对高浓度含硫和含硝酸盐有机废水的经济有效且环境友好的处理工艺。首次基于活性污泥模型 1（ASM1）为 DSR 工艺建立了动力学模型。在 200-800 mg/L 的进水硫化物浓度下进行了 DSR 实验，其结果对模型参数进行了校准。模型与 DSR 工艺动力学很好地吻合。通过引入开关函数和抑制函数，定量描述了自养反硝化菌和异养反硝化菌之间的竞争关系，实现了硫化物对异养反硝化菌的抑制程度。模型输出表明，在进水硫化物浓度为 400-1000 mg/L 时，DSR 反应器可以在 0.5<C/S<3.0 的条件下很好地工作。然而，当进水硫化物浓度高于 1000 mg/L 时，DSR 系统将会崩溃。
