Biological treatment method for organic wastewater hard to degrade
A technology for organic wastewater and biological treatment, applied in water/sludge/sewage treatment, water pollutants, chemical instruments and methods, etc., can solve problems such as residence time up to 60 hours, limited tolerance, long treatment process, etc. Achieve good wastewater treatment effect, short wastewater treatment process, and improve treatment effect
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Embodiment 1
[0026] A certain wastewater contains a small amount of hydrocarbon refractory substances, the average COD concentration is 6500mg / L, the average BOD concentration is 150mg / L, the average total nitrogen concentration is 500mg / L, and the pH is 7.5. The anoxic unit-aerobic unit-denitrification unit combination process of the present invention is used for treatment, wherein in the aerobic unit, the concentration of nitrosative dominant bacteria in the sewage treatment system is 600mg / L, and the concentration of nitrosative dominant bacteria is 600mg / L, and at the same time, according to the sewage treatment The accelerator concentration in the system is 20mg / L, and nitrous bacteria growth accelerator I is added to control the nitrification rate between 75% and 80%. The denitrification unit first adds activated sludge according to the sludge concentration of 1200mg / L, and then According to 0.04% of the volume of wastewater treated per hour, the above-mentioned bacterial agents compo...
Embodiment 2
[0028] A wastewater contains a small amount of nitrogen-containing heterocyclic compounds, with an average COD concentration of 4500mg / L, an average BOD concentration of 120mg / L, an average total nitrogen concentration of 200mg / L, and a pH of 7.8. The anoxic unit-aerobic unit-denitrification unit combination process of the present invention is used for treatment, wherein the aerobic unit is added with nitrosative dominant bacteria according to the concentration of 500 mg / L of nitrosative dominant bacteria in the sewage treatment system, and simultaneously according to the concentration of nitrosative dominant bacteria in the sewage treatment system The accelerator concentration is 25mg / L and the nitrous bacteria growth accelerator II is added to control the nitrification rate between 70%-75%. The denitrification unit first adds activated sludge according to the sludge concentration of 1800mg / L, and then according to 0.08% of the treated wastewater volume per hour is added with ...
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