Pay attention to pH and TP, and try to ensure that the system is in a weak alkaline environment. If necessary, add an appropriate amount of Na2C03 to the system to supplement the alkalinity required for nitrification. If the TP concentration in the reactor is obviously lower than the usual level, appropriate dihydrogen phosphate bait or phosphate fertilizer should be added to the system to improve the flocculation effect and nitrification ability of sludge.
Problems needing attention in urban sewage treatment
If toxic raw materials are used in the chemical industry and toxic intermediate products and products are produced, the wastewater discharged here should be purified in strict accordance with the sewage treatment process. In this kind of wastewater containing highly toxic substances, such as heavy metals, radioactive substances, high-concentration phenol and cyanide wastewater, enterprises should treat it separately to avoid affecting the recycling of wastewater.
Organic wastewater such as food processing wastewater, beverage manufacturing wastewater and paper-making wastewater can be discharged into urban sewage system for treatment.
Biodegradable toxic wastewater, such as phenol and cyanide wastewater, can be discharged into urban sewers according to the allowable part of national discharge standards after treatment, and then further biochemical treatment is carried out. If it contains toxic wastewater that is difficult to biodegrade, it should be treated separately and not discharged into urban sewers.
Refer to the above? People's Daily-People's Daily said: Why doesn't the sewage treatment plant control pollution? People's Daily-Liaoning: The excessive discharge of sewage treatment plants in the whole province 13 was exposed.