Wastewater treatment method after factory shutdown and water inflow
Equipment maintenance: Turn off the sewage lifting pump, mixer and other operating equipment to prevent damage caused by idling, clean, lubricate and inspect them, and replace worn parts in a timely manner. Check whether the pipeline is blocked or leaking, empty the remaining water in the pipeline, and avoid pipeline freezing, cracking or corrosion.
Residual sewage disposal: If there is residual sewage in the treatment tank, choose an appropriate method based on the water quality. When the water quality is good, it can be directly discharged; If the water quality is poor and contains a large amount of pollutants, temporary treatment is required, such as adding chemical agents to precipitate the pollutants, and then discharging or temporarily storing them.
Maintenance of treatment tanks: Clean sedimentation tanks, aeration tanks, and other treatment tanks, remove sludge and debris deposited at the bottom, and inspect the tank structure for damage or leakage.
The impact of long-term water stoppage on activated sludge
Reduced microbial activity: Lack of nutrients in wastewater slows down microbial metabolism, leading to partial microbial death and a decrease in the ability of activated sludge to decompose pollutants.
Sludge swelling or floating: Microorganisms such as filamentous bacteria may proliferate abnormally due to imbalanced nutrition, causing sludge swelling and deteriorating sedimentation performance, resulting in floating phenomenon.
Sludge aging: Microorganisms are in a state of "starvation" for a long time, and the accumulated substances in cells are exhausted. Sludge aging leads to a decrease in coagulation and adsorption performance.
Measures to ensure sludge activity
Add nutrients: Regularly add carbon sources (such as glucose), nitrogen sources (such as urea), and phosphorus sources (such as potassium dihydrogen phosphate) to maintain the nutrients required for microbial growth and metabolism.
Intermittent aeration: Intermittent activation of aeration equipment to maintain an aerobic environment for activated sludge and prevent microbial death due to hypoxia.
Temperature control: Using heating or cooling equipment to maintain the temperature of the activated sludge environment within a suitable range for microbial growth, typically 20-30 ℃.
The method of quickly starting when water comes in
Preparation in advance: Resume aeration and nutrient addition 1-2 days before water intake to activate microbial activity.
Small flow inflow: In the initial stage of inflow, sewage is introduced at a small flow rate, gradually increasing the amount of water to allow microorganisms to adapt to changes in water quality and quantity.
Real time monitoring and adjustment: closely monitor indicators such as water quality, sludge concentration, dissolved oxygen, etc., and adjust operating parameters such as aeration rate and nutrient dosage in a timely manner based on monitoring results.
