Experimental device for water supply and drainage engineeringIt is the core carrier that connects theoretical knowledge with engineering practice, and its "full process teaching" mode breaks the limitations of traditional fragmented experiments, covering the complete chain of "water quality monitoring process operation parameter regulation effect evaluation", helping students build systematic engineering thinking. This teaching mode relies on the modular design and intelligent monitoring function of the device, achieving a step-by-step training from basic cognition to comprehensive application, and widely adapting to the practical teaching needs of water supply and drainage science and engineering majors in universities.

Basic cognition and module disassembly are the starting points of the entire teaching process. Experimental devices usually integrate core modules such as water treatment (coagulation, sedimentation, filtration, disinfection), sewage treatment (activated sludge method, biofilm method), and hydraulic characteristics of pipeline networks. In the early stages of teaching, students need to be guided to familiarize themselves with the structural principles and core components of each module, such as explaining the speed adjustment logic of the agitator in the coagulation experimental module, the design of the water flow state in the sedimentation tank, and clarifying the functional positioning of each module in the water supply and drainage system. At the same time, with the transparent pipeline and visual observation window of the device, the water flow trajectory and pollutant removal process are visually displayed, helping students establish a basic cognitive framework of "raw materials process products" and laying the foundation for subsequent practical operations.

Practical exercises and parameter control are the core components of the entire teaching process.Experimental device for water supply and drainage engineeringThe progressive teaching of "single module operation multi module linkage" is adopted: let students independently complete the operation of a single module, for example, in the water supply treatment module, observe the floc formation process by adjusting the coagulant dosage and mixing speed, and grasp the influencing factors of coagulation effect; Further multi module linkage experiments will be conducted, such as simulating the entire process of "sewage pretreatment biochemical treatment deep treatment". Students need to dynamically adjust parameters such as aeration intensity, reflux ratio, and filtration rate based on the inflow water quality (COD, BOD, SS, etc.) to solve simulation engineering problems such as "water volume fluctuations" and "water quality exceeding standards". The online monitoring system equipped with the device can display real-time data such as pH, dissolved oxygen, turbidity, etc., helping students intuitively judge the effectiveness of parameter regulation and cultivate data-driven process optimization abilities.

Effect evaluation and engineering expansion strengthen the teaching loop. After the completion of the entire process experiment, guide students to conduct offline detection of the effluent water quality (such as using spectrophotometry to measure COD and weight method to measure SS), compare the water quality data of the inlet and each process node, evaluate the treatment effect, and analyze the reasons for errors - such as when the turbidity of the filter effluent exceeds the standard, it is necessary to investigate problems such as filter layer blockage and insufficient backwash strength. At the same time, by combining engineering cases to expand teaching, such as comparing the process differences between experimental devices and actual water plants, discussing cost control and operational difficulties in large-scale operation, and cultivating students' engineering practice and problem-solving abilities. Some devices support simulating special water quality scenarios such as low temperature and high turbidity, further enhancing students' ability to cope with complex engineering conditions.

　　Experimental device for water supply and drainage engineeringThe "whole process teaching" achieves a deep integration of theoretical knowledge and engineering practice through the complete chain of "cognition practice evaluation expansion". This mode not only helps students master the operational skills of core processes, but also cultivates their systematic thinking and engineering literacy, laying a solid foundation for their subsequent involvement in the design, operation, and management of water supply and drainage engineering.