Sarkar Metali, Sangal Vikas Kumar, Sharma Vijay Kumar, Samantray Jitendra, Bhunia Haripada, Bajpai Pramod Kumar, Kumar Anil, Naithani Anil K, Pant Harish Jagat
Department of Chemical Engineering, Thapar University, Patiala 147004, Punjab, India.
Isotope and Radiation Application Division, Bhabha Atomic Research Centre, Mumbai 400085, Maharashtra, India.
Appl Radiat Isot. 2017 Dec;130:270-275. doi: 10.1016/j.apradiso.2017.10.016. Epub 2017 Oct 10.
A radiotracer investigation was carried out in an activated sludge process (ASP) system of an effluent treatment plant in a pulp and paper industry. The system consists of an aeration tank and a secondary clarifier connected in series. The primary objective of the investigation was to measure mean hydraulic retention times (MHRTs) of wastewater and investigate the hydraulic performance of the ASP. Residence time distributions (RTD) of the wastewater were measured in an aeration tank and a secondary clarifier of the system using Iodine-131 as a radiotracer. The measured RTD data was treated and MHRTs were estimated. No bypassing was found to exist in the aeration tank and the secondary clarifier. However, the dead volume in the aeration tank and the secondary clarifier was found and estimated to be 2.34% and 4.6%, respectively. The treated curves were further simulated using suitable hydraulically representative mathematical models and detailed flow patterns in the aeration tank and the secondary clarifier were deciphered.
在一家制浆造纸厂的污水处理厂的活性污泥法（ASP）系统中进行了放射性示踪剂研究。该系统由串联的曝气池和二次沉淀池组成。该研究的主要目的是测量废水的平均水力停留时间（MHRT），并研究活性污泥法的水力性能。使用碘-131作为放射性示踪剂，在该系统的曝气池和二次沉淀池中测量了废水的停留时间分布（RTD）。对测得的RTD数据进行了处理，并估算了MHRT。未发现曝气池和二次沉淀池存在旁路现象。然而，发现并估计曝气池和二次沉淀池中的死体积分别为2.34%和4.6%。使用合适的具有水力代表性的数学模型对处理后的曲线进行了进一步模拟，并解读了曝气池和二次沉淀池中详细的流态。
