CN102464428A - Sewage treatment method for medical institutions - Google Patents

Abstract

The invention relates to a sewage treatment method for medical institutions, which comprises the steps of sewage pretreatment, anaerobic treatment, aerobic treatment, precipitation treatment and disinfection treatment. The sewage treatment method for the medical institutions has low operation cost, is stable to operate and has high sewage treatment efficiency. Effluent continuously reaches the standard and is discharged in a qualified state. The pollution to the environment is effectively controlled. Therefore, not only is the environment improved, but also the load of a domestic wastewater treatment plant is relieved.

Description

A kind of medical institutions sewage water treatment method

Technical field

The present invention relates to a kind of sewage water treatment method, relate in particular to a kind of medical institutions sewage water treatment method.

Background technology

Bioremediation is adopted in medical institutions' WWT at present mostly; Comprise activated sludge process, film-bioreactor, BAF, simple and easy biochemical treatment; All there is certain defective in above method; The activated sludge process operation stability is poor, is prone to sludge bulking and sludge loss take place, and separating effect is not ideal enough; The film-bioreactor GWR is high, and film need carry out backwash, and energy consumption and working cost are high; BAF needs back flushing, operation scheme more complicated; The recoil water yield is bigger; Physical and chemical indexs such as simple and easy biochemical treatment water outlet COD, BOD can not guarantee up to standard.At present general many middle-size and small-size medical institutions do not attach great importance to the processing of sewage; Only rest in the simple and easy biochemical treatment; And there is not the personal management to operate; Water body around the various deleterious organism of its discharging, pathogenic agent, poisonous bacterium etc. have seriously polluted, the physical and mental health that has also endangered the people masses.

Summary of the invention

The present invention for overcome the above problems provide a kind of energy-efficient, running cost is low, the protection environment a kind of medical institutions sewage water treatment method.

Technical scheme of the present invention is: comprise the sewage pre-treatment, also comprise anaerobic treatment, aerobic treatment, precipitation process, disinfect that concrete steps are following:

1), pre-treatment is removed the solid dirt in the sewage, the adjusting water quality and quantity and the ight soil of rationally dissolving.

2), sewage is through promote getting into anoxic pond, with anoxic pond internal reflux nitrification liquid thorough mixing, denitrifying bacteria utilizes the organism in the sewage under anaerobic environment, with NO in the internal reflux nitrification liquid ^3-Be converted into N ₂Discharge, filler is installed, in the anoxic pond to keep the admixture of sewage.

3), after this, all sewage backflow mud get into Aerobic Pond by anoxic pond, in Aerobic Pond, arrange aerating system oxygenic aeration in the pond, adopt the biological contact oxidation metallization processes, make on the microbial film mikrobe that various aerobic biochemicals reactions take place, and guarantee BOD ₅, NH ₃The degraded of-N, the terminal mixed solution of Aerobic Pond is delivered to the anoxic pond leading portion.

4), the Aerobic Pond water outlet carries out mud-water separation because of gravity flows into inclined-plate clarifying basin, the mud in the inclined-plate clarifying basin gets into the mud nitrification tank, mixed-liquor return is to anoxic pond on the settling tank.

5), the inclined-plate clarifying basin water outlet gets into sterilization pool, employing disinfection by chlorine dioxide, sterilization back qualified discharge.

The present invention delivers to the oxygen-starved area leading portion to the terminal mixed solution of Aerobic Pond, with the fresh sewage thorough mixing of firm entering anoxic pond, to keep the carrying out of anti-nitration reaction in the oxygen-starved area, guarantees that water outlet TN is up to standard.Aerobic employing biological contact oxidation metallization processes can not produce the sludge bulking problem, and operational management is simple, need not to be provided with special operator; Need not to be provided with mud backflow facility; The sludge quantity that produces is few, and mud can regularly be transported outward by the fecal suction truck of environmental sanitation department; Capacity of resisting impact load is strong, is particularly suitable for the bigger wastewater treatment of water quality and quantity fluctuation; For conventional activated sludge process, volumetric loading is higher, and processing efficiency is high; The power consumption of contact oxidation method is lower.

Running cost of the present invention is low, and is stable, sewage treating efficiency is high, water outlet continues up to standardly, and pollution on the environment has been controlled in qualified discharging effectively, has so not only improved environment, has also alleviated the load of municipal sewage plant.

Embodiment

A kind of medical institutions sewage water treatment method comprises the sewage pre-treatment, also comprises anaerobic treatment, aerobic treatment, precipitation process, disinfects, and concrete steps are following:

1), pre-treatment is removed the solid dirt in the sewage, the adjusting water quality and quantity and the ight soil of rationally dissolving.

2), sewage is through promote getting into anoxic pond, with anoxic pond internal reflux nitrification liquid thorough mixing, denitrifying bacteria utilizes the organism in the sewage under anaerobic environment, with NO in the internal reflux nitrification liquid ^3-Be converted into N ₂Discharge, filler is installed, in the anoxic pond to keep the admixture of sewage.

3), after this, all sewage backflow mud get into Aerobic Pond by anoxic pond, in Aerobic Pond, arrange aerating system oxygenic aeration in the pond, adopt the biological contact oxidation metallization processes, make on the microbial film mikrobe that various aerobic biochemicals reactions take place, and guarantee BOD ₅, NH ₃The degraded of-N, the terminal mixed solution of Aerobic Pond is delivered to the anoxic pond leading portion.

4), the Aerobic Pond water outlet carries out mud-water separation because of gravity flows into inclined-plate clarifying basin, the mud in the inclined-plate clarifying basin gets into the mud nitrification tank, mixed-liquor return is to anoxic pond on the settling tank.

5), the inclined-plate clarifying basin water outlet gets into sterilization pool, employing disinfection by chlorine dioxide, sterilization back qualified discharge.

Claims (1)

1. medical institutions' sewage water treatment method comprises the sewage pre-treatment, it is characterized in that: also comprise anaerobic treatment, aerobic treatment, precipitation process, disinfect that concrete steps are following:

1), pre-treatment is removed the solid dirt in the sewage, the adjusting water quality and quantity and the ight soil of rationally dissolving.

2), sewage is through promote getting into anoxic pond, with anoxic pond internal reflux nitrification liquid thorough mixing, denitrifying bacteria utilizes the organism in the sewage under anaerobic environment, with NO in the internal reflux nitrification liquid ^3-Be converted into N ₂Discharge, filler is installed, in the anoxic pond to keep the admixture of sewage.

3), after this, all sewage backflow mud get into Aerobic Pond by anoxic pond, in Aerobic Pond, arrange aerating system oxygenic aeration in the pond, adopt the biological contact oxidation metallization processes, make on the microbial film mikrobe that various aerobic biochemicals reactions take place, and guarantee BOD ₅, NH ₃The degraded of-N, the terminal mixed solution of Aerobic Pond is delivered to the anoxic pond leading portion.

4), the Aerobic Pond water outlet carries out mud-water separation because of gravity flows into inclined-plate clarifying basin, the mud in the inclined-plate clarifying basin gets into the mud nitrification tank, mixed-liquor return is to anoxic pond on the settling tank.

5), the inclined-plate clarifying basin water outlet gets into sterilization pool, employing disinfection by chlorine dioxide, sterilization back qualified discharge.