• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advances in Environmental Technology >Effect of operating parameters on the performance of wastewater treatment plant (Case study: The south of Tehran wastewater treatment)
【24h】

Effect of operating parameters on the performance of wastewater treatment plant (Case study: The south of Tehran wastewater treatment)

机译：操作参数对污水处理厂性能的影响（案例研究：德黑兰污水处理厂南部）

获取原文
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Despite the fact that there are wastewater treatment plants (WWTPs) currently operational across Iran and great advances have been made in this area, there are still problems in the design, construction, and operation of WWTPs with large nonlinear systems, varying flow rates, and pollution charges. The objective of this study was to investigate the effect of operating parameters including the return activated sludge (RAS) ratio, internal recycle (IR) ratio and dissolved oxygen (DO) concentration in an activated sludge system for the Modules 5&6 of the Southern Tehran WWTP. This study designed and simulated a plant based on the activated sludge model No.1 (ASM1) to determine the factors affecting wastewater treatment systems; then, the kinetic parameters were measured. The kinetic parameters such as the yield coefficient (Y), decay coefficient (Kd), maximum specific growth rate (K), and saturation constant (Ks) were in the range of 0.303-0.331g/g, 0.030-0.033d-1, 1.65-1.93d-1 and 37.6-44.92mg/l, respectively. The RAS ratios, IR ratios, and DO concentration varied from 0.2 to 2, 1 to 3.5, and 0.27 to 3.54 mg/l, respectively. The amount of RAS had the greatest impact on the effluent. The amounts of IR and DO concentration had no significant effect on the concentration of the five-day biochemical oxygen demand (BOD5), chemical oxygen demand (COD), and total suspended solids (TSS) in the effluent. After the RAS, the amount of IR had the most direct effect on reducing the effluent total nitrogen (TN) concentration. As a result, the overall removal efficiency increased up to 75% when the IR rate was 200% of the influent flow rate, the RAS rate was 90% of the influent flow rate, and the DO concentration in the first aeration unit was 2 mg/l considering the aeration cost. Therefore, proper operating parameters can provide the best quality of effluent that meets environmental standards.
机译：尽管目前在伊朗各地都有废水处理厂（WWTP）运转，并且在该领域已经取得了长足的进步，但在大型非线性系统，变化的流量和较大的污水处理厂的设计，建造和运行中仍然存在问题。污染收费。这项研究的目的是研究德黑兰南部污水处理厂第5和第6单元的操作参数对活性污泥系统中返回活性污泥（RAS）比率，内部循环（IR）比率和溶解氧（DO）浓度的影响。 。本研究基于1号活性污泥模型（ASM1）设计并模拟了一家工厂，以确定影响废水处理系统的因素。然后，测量动力学参数。动力学参数如屈服系数（Y），衰减系数（Kd），最大比生长速率（K）和饱和常数（Ks）在0.303-0.331g / g，0.030-0.033d-1的范围内分别为1.65-1.93d-1和37.6-44.92mg / l。 RAS比率，IR比率和DO浓度分别为0.2至2、1至3.5和0.27至3.54 mg / l。 RAS的量对废水影响最大。 IR和DO的浓度对废水中五天生化需氧量（BOD5），化学需氧量（COD）和总悬浮固体（TSS）的浓度没有显着影响。在RAS之后，IR的量对降低废水中总氮（TN）的浓度具有最直接的影响。结果，当IR率为进水流量的200％，RAS率为进水流量的90％且第一曝气单元中的DO浓度为2 mg时，总去除效率提高到75％ / l考虑曝气成本。因此，适当的操作参数可以提供符合环境标准的最佳废水质量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号