Keywords: hospital medical wastewater; ammonia nitrogen exceeds the standard; denitrifying bacteria
Through the case, to share about the hospital medical wastewater ammonia nitrogen exceeds the standard how to deal with.
Project address: Lushi County, Henan Province
Project situation:
1. The influent contains a large number of suspended solids, most of which are soluble suspended solids, and its source is mainly from the septic tank.
2. Through the detection of ammonia nitrogen concentration in the incoming and outgoing water are around 100mg/L, then the aerobic tank has no nitrification.
3. Higher concentration of ammonia nitrogen in the influent water, the design residence time of aerobic tank is shorter.
Project Analysis:
1. As a large number of suspended solids in the septic tank into the biochemical system, human feces through the ammonia effect of the influent ammonia nitrogen higher than the usual concentration of ammonia nitrogen in hospital wastewater. Secondly, the sewage station did not do the classification of sewage collection, such as the operating table down the sewage containing hemoglobin is high, is also one of the reasons that affect the concentration of ammonia nitrogen rise.
2. After the use of online monitors measured, the ammonia nitrogen concentration in the water is basically the same, ammonia nitrogen without degradation, then the aerobic pool without nitrifying bacteria or nitrification is small.
Engineer solution proposal:
1. Increase the frequency of cleaning septic tanks, clean up once a quarter.
2. After settling the sludge in the second settling tank, it enters the sludge tank for storage by the lifting pump every 2 days, and the lifting pump runs for 15 minutes each time. The sludge in the storage sludge tank is lifted by the lifting pump every 15 days and transported to the tanker truck or sludge suction truck to the unit or department with corresponding treatment qualification for final treatment.
3. Add nitrifying bacteria to the aerobic tank to increase nitrification: add 50 kg of nitrifying bacteria to the O1 tank and 20 kg of nitrifying bacteria to the O2 tank.
4. Aerobic pool add suspended ball filler, increase the biomass in the aerobic pool to solve or slow down the problem of short residence time in the aerobic pool, add the amount of suspended ball filler for 40 cubic meters.
Note: The above is a simple solution, the specific implementation, will communicate clearly decided to solve the problem after the idea, the detailed formulation. Degradation of ammonia nitrogen using nitrifying bacteria, used in aerobic tank (aeration tank).
Gandu | good strains of good service
?