利用小空间厌氧移动床还原硫酸盐的试验研究

杨宏; 陈伟; 谭科艳; 田玉斌; 鄢琳

doi:10.11936/bjutxb2015090072

利用小空间厌氧移动床还原硫酸盐的试验研究

Reduction of Sulfate by Using Small Space Anaerobic Moving Bed Reactor

摘要

摘要: 为了强化硫酸盐还原反应器的还原效能,利用小空间厌氧移动床生物膜反应器,研究了反应温度、进水pH、水力停留时间(hydraulic retention time,HRT)、 ρ(COD)/ ρ(S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ )和回流比对S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 还原效果的影响,从而考察反应器还原S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 的效能及在高负荷条件下稳定运行状况. 研究结果表明:温度35℃、进水pH=7.0、 ρ(COD)/ ρ(S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ )=2.5、HRT=8h和回流比=4∶1为反应器运行的最佳工况条件;进水S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 质量浓度在1500~2500mg/L时,S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 的还原率保持在78.77%~88.89%,S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 的还原速率最高达5.90kg/(m ³·d),表明反应器具有较强的S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 还原能力;在进水S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 质量浓度为2250mg/L左右时,连续运行20d,S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ 还原率达87.13%并能稳定运行.

Abstract: To enhance the sulfate reduction efficiency, the effects of temperature, influent pH, HRT, ρ(COD)/ ρ(S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ ) and reflux ratio on the sulfate reduction were discussed by using small space anaerobic moving bed biofilm reactor. Then the reducing S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ efficiency and stable operation were also studied under high load conditions. Results indicate that the optimal conditions for reactor operation is at temperature 35℃, influent pH=7.0, ρ(COD)/ ρ(S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ )= 2.5, HRT=8h and reflux ratio=4∶1. When the sulfate reduction rate remains in the range of 78.77%-88.89% and sulfate concentrations ranges from 1500 to 2500mg/L; sulfate removal rate is up to 5.90kg/m ³·d and there is a high S $\begin{matrix} O_{4}^{2 -} \end{matrix}$ reduction capacity in reactor. When the condition of the influentsulfate concentrations is 2250mg/L and continuous reactor operation for 20d, the sulfate removal efficiency reaches more than 87.13% and the reactor keeps stable operation.

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