LC-AnDeN ammonia oxidation biological denitrification technology

An-DeN high-efficiency biological denitrification technology is independently developed by our company based on the control principle of anaerobic ammonium oxidation. It breaks through the technical barriers that make it difficult to control anaerobic ammonium oxidation and masters the better growth conditions of anaerobic ammonium oxidation bacteria. On the premise of adding bacteria, the rapid start-up of the efficient biological denitrification system was perfectly realized. This technology can be used for both new construction and renovation.

Process principle

Under hypoxic conditions, anaerobic ammonium oxidizing bacteria use nitrite as an electron acceptor to oxidize ammonia nitrogen into nitrogen gas, a new biological denitrification process technology.technique. Using the self-developed modular autotrophic denitrification device, through control parameter adjustment, partial nitrification of ammonia nitrogen in an aerobic environment and partial nitrification of ammonia nitrogen in an anoxic environment are achieved.Anaerobic ammonium oxidation denitrification. Through process design, efficient removal of ammonia nitrogen and total nitrogen in wastewater is achieved.

Scope of application

1. Sewage with low, medium and high ammonia nitrogen. Used in sludge digestion wastewater, starch industry wastewater, fermentation industry wastewater, pharmaceutical industry wastewater, livestock and poultry raising

Agricultural wastewater, landfill leachate and other industrial wastewater, as well as municipal sewage;

2. Upgrading and renovation projects of existing sewage plants and stations can achieve online installation and debugging operation;

3. New construction, upgrading and expansion projects for wastewater with low, medium and high ammonia nitrogen.

Technical advantages

• Compared with the traditional nitrification and denitrification process, this process controls the nitrification process in the nitrification stage, greatly reducing the amount of oxygen supply. Compared with the traditional process,

It can save more than 50% of power consumption and greatly reduce processing costs;

• The denitrification process does not require the participation of organic matter, eliminating the dependence on external organic matter and greatly reducing treatment costs;

• The amount of residual sludge produced is very small, only about 20% of that of the traditional biological denitrification process;

• At the same time, this system can effectively adjust the parameters required for each reaction to achieve efficient autotrophic denitrification. The ammonia nitrogen removal rate can reach 95%; the total nitrogen removal rate is 75%--

85%;

• High denitrification efficiency, simple process flow, and reduced infrastructure costs.

Applications

A high-nitrogen wastewater treatment project

System water inlet data: CODcr ≈ 1000mg/L, ammonia nitrogen: 400mg/L,

System water output data: CODcr ≈ 100mg/L, ammonia nitrogen ≤ 15mg/L, TN: 40~80mg/L.