High-concentration difficultly degraded chemical waste water treatment method

Abstract

The invention discloses a high-concentration difficultly degraded chemical waste water treatment method. The method comprises 1, waste water collection, 2, pH adjustment and preliminary removal of high-concentration ammonia nitrogen in waste water, 3, deposition separation, feeding of the supernatant into a first iron-carbon Fenton reaction pool and mixing of the supernatant and waste water in a first adjustment tank, 4, hydrochloric acid-based pH adjustment, addition of hydrogen peroxide and ferrous sulphate into the first iron-carbon Fenton reaction pool, mixing of product water and domestic sewage and feeding of the mixture into an anaerobic pond, 5, treatment in the anaerobic pond and lifting of the product water to an A / O integrated tank, 6, treatment on the product water in a second iron-carbon Fenton reaction pool, deposition, supernatant pH adjustment, treatment in a sodium hypochlorite reaction tank and feeding of the product water into a BAF biological aeration filter tank, and 7, treatment on the product water from the BAF biological aeration filter tank through UV high-grade equipment, treatment in a sedimentation basin and discharge of the supernatant into a total discharge opening. The method has high impact resistance, a high treatment capability, a complete process and good treatment efficiency.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a treatment process for high-concentration refractory chemical wastewater. Background technique [0002] Wastewater treatment is the use of physical, chemical and biological methods to treat wastewater, purify wastewater, reduce pollution, and achieve wastewater recovery and reuse, making full use of water resources. The wastewater treatment method that separates and recovers insoluble suspended pollutants (including oil film and oil beads) in wastewater by physical action can be divided into gravity separation method, centrifugal separation method and sieve retention method. Treatment based on the principle of heat exchange also belongs to physical treatment. A wastewater treatment method that separates and removes dissolved and colloidal pollutants in wastewater or converts them into harmless substances through chemical reactions and mass transfer. In the chemical treatmen...

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Problems solved by technology

[0003] At present, it is difficult to meet the chemical synthesis pharmaceutical industry water pollutant discharge standard (GB21904-2008) for the treatment of chemical synthesis pharmaceutical wastewater with high concentration, deep color, complex composition and difficult biochemical degradation.

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