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Characterization of the inhibitory effects of recreational vehicle holding tank additive on an activated sludge system.

机译：表征休闲车储油罐添加剂对活性污泥系统的抑制作用。

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This dissertation characterized the effects of shock loading recreational vehicle (RV) waste, applied as step function additions, on an aerobic, activated sludge system. The study was conducted using a bench-scale system that included three separate biological treatment units each with one-gallon aeration basins and 0.23-gallon clarifiers and a dosing system for treating each unit with a commercially available RV holding tank additive. A synthetic wastewater solution comparable to typical domestic wastewater was developed and used as the wastewater source. The units were operated at four different solids retention times (SRTs) of 4, 5.5, 6.9, and 10 days. The units were loaded with RV holding tank additive continuously for five consecutive days to simulate influent wastewater containing 0%, 10%, 25%, and 50% RV wastewater. Influent soluble COD concentrations were: 463 mg/l at 0%, 542 mg/l at 10%, 659 mg/l at 25%, and 854 mg/l at 50%.; The biological reaction rate was demonstrated to follow first order kinetics, and the reaction order models exhibited coefficient of determination of no less than 0.91. Kinetic coefficients were determined using data collected before introduction of the holding tank additive. The coefficients were: Y max = 0.50 mg VSS/mg COD-day; kd = 0.0725 mg VSS/mg VSS-day; k = 0.75 mg COD/mg VSS-day; and Ks = 25.9 mg/l COD.; A contingency table analysis showed significance greater than 99.9% in the COD removal performances. Comparisons of treatment means for COD removal, nitrification/nitrogen utilization, and oxygen uptake rates were all significant to at least 95% with the following exceptions: oxygen uptake rate at ten days SRT and 10% RV wastewater (less than 90%, greater than 80%), TKN reduction at four days SRT and 10% RV wastewater (less than 80%), and TKN reduction at 5.5 days SRT and 25% and 50% RV wastewater (both less than 80%). Effluent concentrations of soluble COD and solids increased during dosing with the holding tank additive regardless of SRT. As SRT and the dosage rate increased, nitrogen utilization increased. As the dosage rate increased, nitrate-nitrogen effluent concentrations decreased and TKN effluent concentrations increased. The reason was suspected to be reduced nitrification due to presence of the holding tank additive.
机译：本论文的特点是，在有氧活性污泥系统上，作为阶梯功能添加物的冲击负载型休闲车废物的影响。这项研究是使用台式系统进行的，该系统包括三个独立的生物处理单元，每个单元均带有一个一加仑的曝气池和0.23加仑的澄清池，以及一个配量系统，用于使用市售的RV储罐添加剂处理每个单元。开发了一种与典型的生活废水相当的合成废水解决方案，并将其用作废水源。这些单元在4、5.5、6.9和10天的四种不同的固体保留时间（SRT）下运行。这些单元连续五天连续装有RV储罐添加剂，以模拟包含0％，10％，25％和50％RV废水的进水。进水可溶性COD浓度为：0％时为463 mg / l，10％时为542 mg / l，25％时为659 mg / l，50％时为854 mg / l。证明了生物反应速率遵循一级动力学，并且反应级模型显示的测定系数不小于0.91。使用引入储罐添加剂之前收集的数据确定动力学系数。系数为：Y max = 0.50 mg VSS / mg COD·天； k d = 0.0725毫克VSS /毫克VSS天; k = 0.75 mg COD / mg VSS天;和K s = 25.9 mg / l COD。列联表分析表明，COD去除性能的显着性大于99.9％。除以下方面外，COD去除，硝化/氮利用和氧气吸收率的处理方法的比较均显着达到至少95％：SRT十天的氧气吸收率和RV废水的10％（小于90％，大于80％），SRT 4天和10％RV废水（低于80％）时TKN减少，SRT 5.5天和25％和50％RV废水（均低于80％）时TKN降低。在不使用SRT的情况下，添加储罐添加剂期间，可溶性COD和固体的废水浓度会增加。随着SRT和剂量率的增加，氮的利用率增加。随着剂量率的增加，硝酸盐氮流出物浓度降低，TKN流出物浓度增加。怀疑原因是储罐添加剂的存在导致硝化作用降低。

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