Before using domestic wastewater treatment equipment, check the circuitry. Ensure proper wiring connections and verify that the voltage and current meet the requirements.
Carefully inspect the pump for blockages, leaks, or suction issues before starting it.
Domestic wastewater treatment systems usually have high hydraulic resistance. The operation of the two pumps is controlled by a computer monitoring the liquid level in the sewage tank. When the liquid level reaches the working level, the working pump is activated. If the liquid level continues to rise and reaches the alarm level, the pump should be shut off.
The wastewater retention time in the equipment tank is relatively short, which is less than the pump liquid start time. Both pumps will stop running. In practice, intermittent start-up of the blower is used. To ensure the normal growth of biofilm inside the equipment, the blower automatically stops running for half an hour after running for 10 minutes.
Treatment for specific types of domestic wastewater:
a. Phenolic wastewater: In general, this type of wastewater can be recycled. If the concentration of phenol in the treated wastewater is below 100 mg/L, it can undergo chemical oxidation, biological oxidation, or physical oxidation. After treatment, it can be reused.
b. Mercury-containing wastewater: Alkaline mercury-containing wastewater can be treated using chemical coagulation or other methods. Acidic mercury-containing wastewater can be purified using metal reduction. Low-concentration mercury-containing wastewater can be treated using chemical coagulation, activated carbon adsorption, or activated sludge processes. Organic mercury compounds are typically oxidized to inorganic mercury before treatment.
c. Oil-containing wastewater: Treating dispersed and emulsified oil in wastewater can be challenging. To prevent emulsification, careful observation and reduction of emulsifiers in the water can be practiced during the treatment process.
d. Food wastewater: Pre-treatment methods can be employed in food wastewater treatment. Biological treatment, such as dual-polar aeration tanks or dual-polar tanks, can be used for higher water quality requirements.