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Chemical synthesis pharmaceutical solvent recovery wastewater treatment method

A wastewater treatment and chemical synthesis technology, which is applied in chemical instruments and methods, natural water treatment, water/sewage treatment, etc., can solve problems such as waste of resources, and achieve the effect of avoiding waste and realizing degradation

Pending Publication Date: 2021-01-15
CHONGQING TECH & BUSINESS UNIV +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention intends to provide a chemical synthesis pharmaceutical solvent recovery wastewater treatment method to solve the problem of waste of resources in the prior art chemical pharmaceutical wastewater treatment method

Method used

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  • Chemical synthesis pharmaceutical solvent recovery wastewater treatment method
  • Chemical synthesis pharmaceutical solvent recovery wastewater treatment method

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Experimental program
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Embodiment 1

[0034] A chemical synthesis pharmaceutical solvent recovery wastewater treatment method, comprising the steps of:

[0035] Step I: Physicochemical treatment, using electrolytic air flotation pretreatment system to pretreat wastewater, electrolytic air flotation pretreatment system includes magnet fluidized bed, micro-electrolysis reactor, Fenton reactor and reaction sedimentation tank set up in sequence, adjacent Pipelines are connected between the equipment; the magnet fluidized bed is divided into three stages, including the aeration section, the reaction section and the separation section. The hydraulic retention time (HRT) of the aeration section is 24h, and the HRT of the separation section is 4h; The reactor is in an aeration state, the HRT of the Fenton reactor is 6h, and the HRT of the reaction sedimentation tank is 5h;

[0036] Step II: solvent recovery, including concentration stage, rectification stage and dehydration stage, such as figure 1 as shown,

[0037] Con...

Embodiment 2

[0042] Such as figure 2 As shown, the difference between this embodiment and the first embodiment is that: in this embodiment, the hot water port is connected with a hot water tank 18 and a water circulation vacuum pump 19 . In this embodiment, the steam in the falling film tower kettle 5 will be condensed into liquid (hot water) after heat exchange, and will be discharged along the hot water outlet. The temporary heating of this part of hot water can be realized by the hot water tank 18 and the water circulation vacuum pump 19. storage and later recycling.

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Abstract

The invention relates to the field of wastewater treatment, and discloses a chemical synthesis pharmaceutical solvent recovery wastewater treatment method. The method comprises the steps of I, physicochemical treatment, specifically, pretreating wastewater by adopting an electrolysis flotation pretreatment system; II, solvent recovery including a concentration stage, a rectification stage and a dehydration stage, wherein the purity of the treated solvent is greater than 98%; and III, biochemical treatment, specifically, treating the wastewater subjected to solvent recovery by using a UASB reactor, a two-stage series aerobic and anaerobic system and an MBR reactor in sequence. According to the method, the solvent in the chemical synthesis pharmaceutical wastewater can be recycled, and the impurities can be fully degraded.

Description

technical field [0001] The invention relates to the field of waste water treatment, in particular to a chemical synthesis pharmaceutical solvent recovery waste water treatment method. Background technique [0002] Chemical synthesis pharmaceutical wastewater is a kind of wastewater with complex components and strong biological toxicity. Chemical synthesis pharmaceutical wastewater contains complex organic matter, inorganic matter, catalysts, raw materials and reaction intermediates, etc., and generally has high chemical oxygen demand and low biological toxicity. Degradability characteristics. Due to the above-mentioned characteristics of chemically synthesized pharmaceutical wastewater, it is difficult for microorganisms to grow, which brings great difficulties to the biochemical treatment methods used in traditional wastewater treatment. [0003] The water treatment methods currently used for chemical and pharmaceutical wastewater are usually: physical and chemical treatme...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/34
CPCC02F9/00C02F1/465C02F1/04C02F3/30C02F3/00C02F2103/343
Inventor 申渝齐高相陈猷鹏晏鹏庞家胜刘曦薇洪国强徐开仕白智全
Owner CHONGQING TECH & BUSINESS UNIV
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