Yu Guangping

On Simplified Model for Activated Sludge Wastewater Treatment Process and Simulation Based on Benchmark

Because of the complex structure and the numerous parameters of existing models for the activated sludge wastewater treatment process (WWTP), there are great difficulties to directly apply the models in simulation systems. In order to enhance the practicality of the models for the WWTP, a simplified model is developed based on the activated sludge model No. 1 (ASM1), which is the most widely studied model and published by the International Water Association (IWA). The simplified model is suitable for describing the process of carbon removal in the plug-flow activated sludge WWTP. It has a much simpler structure and less time cost in simulation. To validate the effectiveness fairly, the simplified model is applied based on the benchmark. The benchmark is a standard platform-independent simulation environment proposed by IWA defining a plant layout, a simulation model, influent data, test protocols and evaluation criteria. The simplified model replaces the ASM1 to describe the biological-chemical reactions of the reactors in the benchmark plant. The simulation result is closed to the test data using three different weather files and demonstrates the precision of the simplified model.

Application of the wastewater toxicity diagnosing technology based DO curve characteristics in treatment of dyeing wastewater

By cultivation of biofilm in the biological aerobic tank in the field to solve the problem that the diagnostic device of the toxic wastewater can not collect suspended activated sludge due to widespread use of contact oxidation process in dyeing wastewater treatment plant. Data obtained results from the running device is injected dyeing wastewater, including the integrity and reproducibility of DO (Dissolved Oxygen) curve, judgment of low load wastewater and diagnosis of toxic wastewater, are in line with the expected results, this show that the wastewater toxicity diagnosing technology and device based DO curve characteristics is suitable for dyeing wastewater treatment plants. It provide a practical technology and device for avoiding toxic substances against the biological treatment stage of dyeing wastewater treatment plant.