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Pharmacy wastewater salt-dividing processing method

A pharmaceutical wastewater treatment method technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve the problem of high cost

Inactive Publication Date: 2019-01-15
BEIJING TDR ENVIRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the cost of treating solid hazardous waste in China is basically more than 3,000 yuan / ton, and the cost is even higher than the sum of the costs of the previous stages of membrane concentration, evaporation concentration, and evaporation crystallization.

Method used

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Experimental program
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Effect test

Embodiment

[0058] Taking a company's reclaimed water reuse build-operate-transfer (BOT) project as an example, the company's daily production of pharmaceutical wastewater is 12,000m 3 / d. Before the technology of the present invention was adopted, the pharmaceutical wastewater was directly treated by the company's sewage treatment system, and the obtained primary effluent directly entered the mechanical vapor recompression system (MVR for short) for evaporation and crystallization. Due to the high COD, high content of suspended matter and high hardness in the wastewater, the MVR needs to be cleaned frequently, resulting in the processing capacity of the entire MVR system not reaching 80% of the design capacity, and the energy consumption is extremely high.

[0059] After adopting the process of the present invention, the concentrated solution of the membrane system enters the salt separation system after being pretreated, and the NaCl and NaCl in the waste water are realized 2 SO 4 Con...

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Abstract

The invention provides a pharmacy wastewater salt-dividing processing method. The method comprises following steps: introducing pharmacy wastewater into a V shape filter tank to remove SS; introducingeffluent of the V shape filter tank into a primary DTL reverse osmosis system to carry out desalting and primary concentration; softening the concentrated water from the primary DTL reverse osmosis system; and introducing softened water into a secondary DTL reverse osmosis system to carry out secondary concentration so as to satisfy the requirement on recovery rate. The concentrated water of thesecondary DTL reverse osmosis system is introduced into DTNF to separate NaCl and Na2SO4; the produced water from DTNF is introduced into a DTRO system to concentrate NaCl; and finally the monovalentsalts and divalent salts are separated and concentrated. The resources are harmlessly recovered by the method, and at the same time, solved are the problems that the crystallization of an evaporationcrystallizing system is difficult and the crystal quality is bad.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a salt separation treatment method for pharmaceutical wastewater. Background technique [0002] For most industries, due to the complex salt content in wastewater, it is very difficult to achieve "zero solid waste" discharge only by simple evaporation. If the waste water is not treated with salt separation, the final solid miscellaneous salt will basically be disposed of as solid hazardous waste (referred to as solid hazardous waste). At present, the cost of treating solid hazardous waste in China is basically more than 3,000 yuan / ton, and the cost is even higher than the sum of the costs of the previous stages of membrane concentration, evaporation concentration, and evaporation crystallization. Therefore, in the design of the entire high-salt wastewater treatment process, if the final solid product can be sold as a product instead of being treated as solid hazardo...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F103/02
CPCC02F1/001C02F1/04C02F1/441C02F1/50C02F1/5236C02F1/56C02F1/66C02F3/00C02F5/00C02F9/00C02F2001/007C02F2101/30C02F2103/026C02F2301/08Y02A20/131
Inventor 齐奇饶斌罗征张立娜
Owner BEIJING TDR ENVIRON TECH CO LTD
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