Aeration system activated carbon adsorption biological oxidation process

Abstract

The invention discloses an aeration system activated carbon adsorption biological oxidation process. The process comprises the following steps: step 1, sewage flocculation; step 2, sewage pre-sedimentation; step 3, sewage regulation; step 4, selecting by a selector; step 5, aeration treatment; step 6, secondary precipitation; step 7, sludge dehydration; step 8, harmless discharge; the COD (Chemical Oxygen Demand) in the treated sewage is 45mg / l, the suspended solids are 8mg / l, the ammonia nitrogen is 2mg / l, the total nitrogen is 5mg / l, the total phosphorus is 0.2 mg / l and the chromaticity is 4 times and is smaller than GB3544-2008 < Discharge Standard of Water Pollutants for Pulping and Papermaking Industry >, harmless discharge of the sewage is realized, the oxygen demand is automatically detected through the arrangement of an intelligent aeration energy-saving control system, the aeration quantity matched with the oxygen demand is timely adjusted according to the oxygen demand, and the sewage treatment efficiency is improved. The energy consumption of the aeration system is saved by 9.5%, a facility for inputting a PAC biological carrier is additionally arranged in the aeration tank, activated carbon adsorption and biological oxidation are combined for treatment, and the purification function of the activated sludge process of the aeration tank is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an activated carbon adsorption biological oxidation process of an aeration system. Background technique [0002] Pulp and paper industry wastewater contains a large number of different types of refractory organics. After conventional biological treatment, most of the refractory organics have not been effectively degraded, resulting in high chromaticity, complex pollutants, poor biodegradability, and biological Toxic, it is difficult to meet the discharge standard, and the water body can only be discharged after subsequent treatment. The subsequent treatment technologies mainly include physical and chemical treatment and enhanced biological treatment. , the enterprise needs to continuously invest in the construction of new sewage treatment facilities to meet the discharge requirements; [0003] Papermaking wastewater treatment, especially industrial wastewater containing...

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Problems solved by technology

[0002] Pulp and paper industry wastewater contains a large number of different types of refractory organic matter. After conventional biological treatment, most of the refractory organic matter has not been effectively degraded, resulting in high chroma, complex pollutants, poor biodegradability, and biological Toxicity, it is difficult to meet the discharge standard, and the water body must be discharged after subsequent treatment. The subsequent treatment technology mainly includes physical and chemical treatment and enhanced biological treatment. As the country pays more and more attention to environmental protection, the discharge standard after sewage treatment is becoming more and more stringent. , enterprises need to continuously invest in the construction of new sewage treatment facilities to meet the discharge requirements;

[0003] Papermaking wastewater treatment, especially industrial wastewater containing refractory organic matter, encounters thorny problems in the use of biological treatment processes, such as poor biodegradability of wastewater, unsatisfactory biological treatment effect, and unstable effluent quality. Therefore, it is necessary to seek a method that does not increase It is an enhanced biological treatment process that can meet the technical requirements. Among them, the activated carbon adsorption biooxidation process in the aeration system is one of the technically and economically feasible processes. The organic matter that is difficult to remove in the biological treatment process is usually better for activated carbon. The adsorption can be removed by adsorption method, and the combination of adsorption and biological treatment, adsorption is beneficial to prolong the biodegradation reaction time of the adsorbed organic matter

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