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Process for recycling and processing hyperhaline reverse osmosis concentrated water

A technology of reverse osmosis concentrated water and treatment process, which is applied in the field of sewage treatment, can solve the problems of low purification efficiency, sludge bulking, and large amount of remaining sludge, and achieve stable operation, overcome sludge bulking, and overcome sludge floating Effect

Active Publication Date: 2014-07-23
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] The high-salt reverse osmosis concentrated water indicators to be treated: pH value is 8.6, COD value is 207mg / L, DOC value of dissolved organic carbon is 41.6mg / L, TDS value of total dissolved solids is 3180mg / L, color value is 172(Pt-Co). The treated water volume is 5 liters.

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

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

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

Embodiment 2

[0043] Embodiment 2: Except for the following differences, the others are the same as in Embodiment 1.

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

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

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

Embodiment 3

[0047] Embodiment 3: Except for the following differences, the others are the same as in Embodiment 1.

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

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

[0050] After testing, the final water index is: pH value is 8.46, COD value is 19.8mg / L, DOC value of dissolved organic carbon is 2.87mg / L, TDS value of total dissolved solids is 610mg / L, color 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, and in particular to a process for the treatment and reuse of high-salt reverse osmosis concentrated water produced in the process of sewage regeneration. Background technique [0002] As a high-efficiency, energy-saving and environment-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, and purification of surface water and groundwater. The desalination of seawater and brackish water and the regeneration and reuse treatment of secondary effluent from sewage plants. Since reverse osmosis technology is the most subtle physical separation process, in the process of preparing reclaimed water, concentrated water (RO concentrate) containing high concentration of salt and soluble o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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