Sewage electrolysis experimental deviceIt is a teaching and research equipment designed specifically for fields such as environmental engineering and chemistry, mainly used for experiments such as phenol containing wastewater treatment, waste acid and metal recovery. The layout of the sewage electrolysis experimental device is reasonable, beautiful, the structure is clear, and the overall feeling is strong. A gas distribution pipe is installed at the bottom of the electrolytic cell, and air agitation is used to reduce concentration differences, which can prevent sedimentation and accumulation after electrolysis in the cell. Using graphite material as the anode, it is not easily oxidized, maintaining stable working resistance and energy consumption.
Main configuration:
Electrolytic cell, electrode plate, rectifier, gas pump, inlet pump, flowmeter, high-level water tank, circuit control system, stainless steel movable frame, control screen.
Operation steps:
Device inspection: Confirm the airtightness of the electrolytic cell and check whether the electrode (titanium based coating/stainless steel) is firmly connected to the power supply.
Wastewater treatment:
Inject phenol containing wastewater or copper containing wastewater into the electrolytic cell, with the liquid level covering the electrode sand core.
If treating ammonia nitrogen wastewater, it is necessary to adjust the pH to alkaline to enhance the reaction efficiency.
Electricity electrolysis:
Start the DC power supply (voltage must be greater than the theoretical decomposition voltage).
Observing the generation of electrode bubbles, the negative electrode gas volume is usually twice that of the positive electrode.
Effect evaluation:
Detect COD, chromaticity removal rate, or copper ion recovery rate.
Record the current efficiency (ratio of actual precipitate mass to theoretical value).
Electrode maintenance techniques:
Cleaning: Rinse the electrode with pure water after the experiment to avoid wiping the glass bulb (which can easily generate static electricity).
Calibration: Use standard solution for calibration before use, and do not operate in the original bottle.
Storage: Soak the electrode in 3M KCl solution to prevent drying and damage.