Method for realizing semi-hitrosation under normal temperature municipal sewage condition
A technology for urban sewage and conditions, applied in the field of urban sewage treatment and resource utilization, can solve the problem of high energy and material consumption of biological denitrification, and achieve the effects of short start-up period, alleviation and solution of water crisis, and simple operation.
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Embodiment 1
[0029] A biofilter column reactor is used. The diameter of the biological filter column reactor is 20cm, and the height is 3m. The bottom layer is paved with 20cm high pebbles with a particle size of 1-2cm as a supporting layer, and 150cm of volcanic rock with a particle size of 6-8mm is added as the main reaction zone filler. The gas device strictly controls the concentration of dissolved oxygen in the reactor water. In the start-up stage, connect ordinary sludge with nitrification function, and control the dissolved oxygen concentration in the treated water in the range of 2-4mg / L. Under this operating condition, after 10 days, the nitrification rate of the reactor effluent will reach 50%, which is considered good. Oxy-nitrification sludge film formation was successful. On this basis, NH was added to the reactor influent 4 + -N, make NH 4 + -The concentration of N reaches the range of 200-250mg / L, and the dissolved oxygen is controlled in the range of 0.2-0.4mg / L, and i...
Embodiment 2
[0031] Using SBR reactor. The effective volume of the SBR reactor is 5L, and an aeration device is installed at the bottom to control the concentration of dissolved oxygen in the treated water, and a stirrer is installed to strengthen the matrix transfer. In the start-up stage, connect ordinary sludge with nitrification function, and control the dissolved oxygen concentration in the treated water in the range of 2-3mg / L. Under this operating condition, after 7 days, the nitrification rate of the reactor effluent will reach 50%, which is considered good. The domestication of oxynitrification sludge was successful. On this basis, NH was added to the reactor influent 4 + -N, make NH 4 + -The concentration of N reaches the range of 160-230mg / L, and the dissolved oxygen is controlled in the range of 0.1-0.4mg / L, and it runs for 10 days under this condition. When the reactor effluents NO 2 - The concentration of -N exceeds that of NH in raw sewage 4 + -1 / 2 of the N concentra...
Embodiment 3
[0033] The continuous flow activated sludge process reaction tank is adopted. The main reaction area of the continuous flow activated sludge process reactor is equipped with an aeration device and a stirring device, which are used to control dissolved oxygen and substrate transfer respectively. Part of the sludge in the sedimentation area is returned to the main reaction area through a peristaltic pump. In the start-up stage, connect ordinary sludge with nitrification function, and control the dissolved oxygen concentration in the treated water to be in the range of 2-4mg / L. Under this operating condition, after 8 days, the nitrification rate of the reactor effluent will reach 50%, which is considered good. The domestication of oxynitrification sludge was successful. On this basis, NH was added to the reactor influent 4 + -N, make NH 4 + -N concentration reaches the range of 190-240mg / L, and the dissolved oxygen is controlled in the range of 0.1-0.5mg / L, and it runs for ...
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