Introduction to the Basic Information of the Project

A sewage treatment plant in a certain city is designed with a capacity of 50000 m3/d, but the actual operating water volume is around 40000 m3/d. In summer, some seafood water is mixed in.

The processing technology is:

Collecting tank - primary sedimentation tank - anaerobic tank - anoxic tank - aerobic tank - secondary sedimentation tank - intermediate water tank - coagulation tank - high-density sedimentation tank - filter tank - disinfection tank - discharge.

The biochemical system adopts the AAO process.

The water plant originally used sodium acetate (COD of 214000 mg/L) at a price of 1500 yuan/ton. At the request of the sewage treatment plant, our company provided Total Nitrogen Activating Bacteria 101 and dispatched professional personnel to the plant for debugging, reducing the total nitrogen in the effluent to the discharge standard of Grade A, and the customer requested TN<15 mg/L.

Project Implementation Requirements

Without changing the original facilities of the water station, we adopted a biochemical system microbial optimization and targeted nutrient combination scheme, using our company's composite carbon source and total nitrogen degrading bacteria to stabilize the total nitrogen in the system effluent to below 15 mg/L.

Project implementation personnel and division of labor

Debugging personnel: Yang Gong (EconZon), Wang Factory (Director of a certain sewage treatment plant)

(a) System control personnel: Control various systems, mainly to improve the flow regulation of pumps, the mixing effect of the main reaction zone (aeration size), dosing facilities, sludge water separation facilities (sludge level in the sedimentation tank), sludge discharge facilities, pressure sludge, etc. Equipment control is the responsibility of the water plant engineer, with the cooperation of Chimelong Technology engineers.

(b) Water quality monitoring personnel: Track and monitor the treated water quality to ensure effluent quality. The control and adjustment of carbon source dosage are the responsibility of Changlong Technology engineers.

(c) Water quality monitoring personnel: The key process parameters and physical and chemical indicators (ammonia nitrogen, COD, total nitrogen, DO, etc.) are monitored by water plant engineers, with the cooperation of EcoZon engineers.

Project implementation time and operation status

Debugging time: 7 days

Composite carbon source addition: The COD of composite carbon source 101 is 600000 mg/L, and it is added using a centrifugal pump on site to ensure an average dosage of 100 mg/L.

Strain addition: On December 3rd, add 100 kg of strain into the anaerobic tank.

Water quality monitoring: Take water samples from each process section every day to test COD, total nitrogen, and ammonia nitrogen, and record and save the data.

Daily operation management:

a. When EcoZon engineers request adjustments to the process, they first notify the on-site person in charge and make adjustments with the cooperation of the on-site person in charge;

b. EcoZon engineers implement a 12 hour follow-up system;

c. Collaborate with quality engineers to solve unexpected incidents on site.