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Process for recycling and processing hyperhaline reverse osmosis concentrated water

A technology of reverse osmosis concentrated water and treatment process, applied in the field of sewage treatment, can solve the problems of sludge bulking, low purification efficiency, large amount of excess sludge, etc. Effect

Active Publication Date: 2012-08-15
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of excess sludge produced by the activated sludge method is large, and sludge bulking is prone to occur. For high-salt wastewater with a relatively low concentration of organic matter, the purification efficiency is low.

Method used

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  • Process for recycling and processing hyperhaline reverse osmosis concentrated water
  • Process for recycling and processing hyperhaline reverse osmosis concentrated water
  • Process for recycling and processing hyperhaline reverse osmosis concentrated water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Indicators of high-salt reverse osmosis concentrated water to be treated: pH value is 8.6, COD value is 207mg / L, dissolved organic carbon DOC value is 41.6mg / L, total dissolved solids TDS value is 3180mg / L, chromaticity value is 172 (Pt-Co). 5 liters of treated water.

[0031] like figure 1 As shown, the following steps are adopted to reuse the above-mentioned high-salt reverse osmosis concentrated water:

[0032] 1. The high-salt reverse osmosis concentrated water first enters the regulating tank to adjust the water volume, so as to ensure that the whole device can continuously enter water and operate stably. The volume of the adjustment tank is 10 liters. The regulating pool is used to adjust the water intake to ensure continuous water intake and stable operation of the device.

[0033] 2. The effluent from the adjustment pool is pumped into the photocatalytic oxidation reactor by a peristaltic pump, and a photocatalytic oxidant H with a concentration of 50% is ad...

Embodiment 2

[0043] Embodiment 2: except following difference, other is the same as embodiment 1.

[0044] 2. Add photocatalytic oxidant H 2 o 2 0.408mg, UV photolysis reaction 60min.

[0045] 3. The empty bed contact time of the biological activated carbon reactor is 180min.

[0046] After testing, the final effluent indicators are: pH value is 8.45, COD value is 18.3mg / L, dissolved organic carbon DOC value is 2.37mg / L, total dissolved solids TDS value is 482mg / L, chromaticity value is 29 ( Pt-Co). The COD removal rate is 91.2%, the TDS removal rate is 84.8%, and the DOC removal rate is 94.3%.

Embodiment 3

[0047] Embodiment 3: except following difference, other is with embodiment 1.

[0048] 2. Add photocatalytic oxidant H 2 o 2 0.272mg, UV photolysis reaction for 30min.

[0049] 3. The empty bed contact time of the biological activated carbon reactor is 60 minutes.

[0050] After testing, the final effluent indicators are: pH value is 8.46, COD value is 19.8mg / L, dissolved organic carbon DOC value is 2.87mg / L, total dissolved solids TDS value is 610mg / L, chromaticity value is 37 ( Pt-Co). The COD removal rate is 90.4%, the TDS removal rate is 80.8%, and the DOC removal rate is 93.1%.

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Abstract

The invention relates to the technical field of sewage treatment in environmental engineering, and in particular relates to a process for recycling and processing hyperhaline reverse osmosis concentrated water generated in a sewage regeneration process. The process comprises the following steps of: carrying out photo-catalytic oxidation treatment: carrying out photo-catalytic oxidation reaction on the hyperhaline reverse osmosis concentrated water; carrying out biochemical reaction treatment: carrying out biochemical reaction on output water after the photo-catalytic oxidation reaction; and carrying out desalination treatment and ultra-filter purification treatment. The process disclosed by the invention has the benefits that the process has high eliminating efficiency on pollutants; reutilization of the hyperhaline reverse osmosis concentrated water can be realized; the process can be applied to processing other hyperhaline waste water with low concentration of organic matters and difficult to be subjected to biochemical treatment; the problems, such as sludge bulking and sludge floatation, easily appear in the active sludge method process, can be overcome; and the process has the characteristics of being steady for operation, strong in impact load resistant capability and economical and energy-saving, has a certain nitration and denitrification function, and is capable of being operated in a closed manner, preventing odour and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment in environmental engineering, in particular to a treatment and reuse process for high-salt reverse osmosis concentrated water generated in the sewage regeneration process. Background technique [0002] As a high-efficiency, energy-saving and environmentally friendly membrane separation technology, reverse osmosis membrane (RO) is widely used in the fields of medicine, food, beverage, seawater desalination, etc. In the field of water treatment, it is mainly used for the purification, purification, Desalination of seawater and brackish water and regeneration and reuse of secondary effluent from sewage plants. Since reverse osmosis technology is the finest physical separation process, in the process of preparing recycled water, concentrated water (RO concentrate) containing high concentrations of salt and dissolved organic pollutants (DOM) will be produced. Because reverse osmosis concentra...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/32C02F1/72C02F1/28C02F1/44
CPCY02A20/131
Inventor 卢杰丁金城闫雪
Owner SHANDONG UNIV OF TECH
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