含硫化物废水在升流式填料塔中的处理及数学模拟

Treatment and Mathematical Simulation of Wastewater Containing Sulfide in Aerobic Up-Flow Packed Tower

在升流式填料塔中,通过接种排硫硫杆菌形成稳定生物膜.在pH值和温度分别控制在 7. 0±0. 1和 30±2℃条件下,进水质量浓度分别为 85. 76, 177. 83, 269. 55和 394. 26mg/L时,改变硫化物容积负荷 (VLR)和溶解氧水平进行正交试验.研究和分析硫化物容积负荷与溶解氧共同作用下硫化物的去除规律、硫酸盐的生成规律以及单质硫的生成率,并对建立的模拟方程进行了验证.结果表明,在升流式生物填料塔内废水中的硫化物去除率能达到9500以上;应用模拟方程,对于不同的进水浓度,都能找到一个最佳的运行工况.在硫化物去除率和单质硫的生成率达到最佳时,保持反应器的最大容积负荷和最小的溶解氧.

The stable bio-membrane came into being after inoculating a strain of Thiobacillus thioparus sp in aerobic up-flow packed tower. When the sulfide influent concentrations were 85.76, 177.83, 269.55 and (394.26 mg/L) respectively when pH was 7.0±0.1 and tempreture was 30±2 ℃, the tests for each given concentration were finished while changing the volumetric loading rate (VLR) of sulfide and dissolved oxygen. Through the analysis of the sulfide removal rate, sulfate production rate and sulfur forming efficiency, the simulation equations were established and validated by practical tests. The results show that the sulfide removal rate reaches over 95~0_0 in the aerobic up-flow packed tower.For different influent concentrations,an optimal operation condition can be found while the established regression equations are applied. The possible maximal VLR and possible lowest dissolved oxygen can be maintained when the sulfide removal rate and sulfate production rate get the best results. These will provide the theory basis for optimizing wastewater treatment process and lowering its energy consumption.