If the ammonia nitrogen and total nitrogen in the domestic sewage in winter are not up to standard, the following methods can be considered to improve the treatment effect:
1.Increase aeration time: ammonia nitrogen is mainly the ammonia produced by the decomposition of organic matter, and the oxidation degree of ammonia nitrogen in wastewater can be improved by increasing the aeration time. The residence time of the aeration tank can be appropriately extended or the aeration volume can be increased to increase the oxidation reaction time of ammonia nitrogen.
2.Adjust the aeration method: A reasonable aeration method can help to improve the removal effect of ammonia nitrogen in wastewater. Strong aeration, sub-aeration or intermittent aeration under aerobic conditions can be used to increase the contact area between wastewater and air and the gas mass transfer effect, and promote the oxidation of ammonia nitrogen.
3.Addition of nitrifying bacteria: Nitrifying bacteria can promote the oxidation of ammonia nitrogen to nitrate nitrogen. Consideration may be given to adding nitrifying bacteria to the wastewater treatment system to enhance the oxidation process of ammonia nitrogen. This can be achieved by adding activated sludge containing nitrifying bacteria, microbial preparations, or adding sewage containing ammonia nitrogen for level cultivation of nitrifying bacteria.
4.Optimized temperature control: The oxidation rate of ammonia nitrogen is greatly affected by temperature, and in general, the suitable temperature range is 20-35 degrees Celsius. In winter, the temperature of the wastewater treatment system can be raised by heating or insulation measures to promote the oxidation of ammonia nitrogen.
5.Consider adding degraders: In some cases, it may be necessary to consider adding specialized degraders to accelerate the removal of ammonia and total nitrogen. These degraders can reduce the concentration of ammonia nitrogen and total nitrogen through chemical reactions or biodegradation actions.
It is necessary to select the appropriate method for improvement according to the specific situation and the characteristics of the wastewater treatment process and equipment. At the same time, the water quality parameters of the wastewater need to be monitored regularly and adjusted and optimized accordingly.