Wastewater treatment technology and device beneficial to removing black and odorous water

Abstract

The invention provides a wastewater treatment technology beneficial to removing black and odorous water.The technology sequentially comprises the following steps of collecting basin treatment, coagulation and air floatation treatment, bio-contact oxidation treatment and constructed wetland treatment.The technology is easy to operate and good in water drainage effect, and produces no odor in the treatment process.The invention further provides a wastewater treatment device beneficial to removing black and odorous water.The device sequentially comprises a collecting basin, a coagulation and air floatation basin, a bio-contact oxidation treatment basin and a constructed wetland treatment system.The device is simple in structure, convenient to maintain and good in wastewater treatment effect.

Description

Technical field [0001] The invention relates to the technical field of water treatment, in particular to a sewage treatment process and device that is beneficial to eliminating black and odorous water bodies. Background technique [0002] Urban sewage mainly includes kitchen sewage, bathroom sewage, car washing wastewater, air-conditioning cooling wastewater, bathing wastewater, laundry drainage, waterscape circulating water, etc. At present, most urban sewage treatment adopts primary treatment and secondary treatment methods. Primary treatment mainly uses physical methods to remove suspended solid pollutants in the sewage. The sewage after the primary treatment does not meet the discharge standards. The secondary treatment uses biological treatment technology, which uses microorganisms to degrade and remove the organic matter in the sewage. The representative processes mainly include the activated sludge method and the biofilm method. [0003] However, the activated sludge metho...

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Problems solved by technology

At the same time, the biofilm method has the following disadvantages: the biofilm carrier increases the investment of the system; the specific surface area of ​​the carrier material is small, the volume of the reaction device is limited, the space efficiency is low, and the treatment efficiency is lower than that of the activated sludge method when treating urban sewage; The microbial biomass on the solid surface is difficult to control, and the operation flexibility is poor; relying on natural ventilation for oxygen supply is not as sufficient as activated sludge, and it is easy to produce anaerobic

However, the disadvantage of this method is that the anaerobic treatment process produces odor, which pollutes the surrounding environment, and the treated sewage is discharged into the water body to easily produce black odor.

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