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Method for processing reverse osmosis concentrated water

A reverse osmosis concentrated water and treatment method technology, applied in the field of reverse osmosis concentrated water treatment, can solve the problems of unfeasible economy, high treatment cost, difficult biochemical degradation, etc., achieve low treatment cost, small dosage, no The effect of secondary pollution

Active Publication Date: 2010-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Since the reverse osmosis feedwater is sewage after biochemical treatment, the organic matter in the concentrated reverse osmosis water produced is difficult to degrade biochemically, and the salt content of the concentrated reverse osmosis water is relatively high, and the conductivity is usually above 5000μs, so the biochemical The method is difficult to deal with; the conventional flocculation and filtration methods are basically ineffective; the cost of activated carbon adsorption and distillation is too high, and it is not economically feasible at all

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use H 2 o 2 +Fe 2+ Treatment of reverse osmosis concentrated water. The operating conditions are determined as follows: the pH value of the feed water is 6, the catalyst Fe 2+ The dosage is 4mol / L, H 2 o 2 The dosage is 120mg / L, the residence time of the wastewater in the reactor is 60 minutes, and the residence time of the wastewater in the flocculation tank is 20 minutes. The water quality indicators of the wastewater before and after treatment are shown in Table 1. It can be seen from the data in Table 1 that after the wastewater is oxidized, the COD is reduced to below 60mg / L, which meets the requirements of discharge standards.

[0025] Table 1H 2 o 2 +Fe 2+ Process wastewater quality data

[0026] Raw water COD(mg / L)

Embodiment 2

[0028] Ozone is used to treat reverse osmosis concentrated water. The operating conditions are determined as follows: the influent pH value is 9, O 3 The dosage is 90 mg / L, and the residence time of the wastewater in the reactor is 40 minutes. The water quality indicators of the wastewater before and after the reaction are shown in Table 2. It can be seen from the data in Table 2 that after the wastewater is oxidized, the COD is reduced to below 60mg / L, which meets the requirements of discharge standards.

[0029] Table 2 Ozone treatment wastewater water quality data

[0030] Raw water COD(mg / L)

Embodiment 3

[0032] Using chlorine dioxide + Fe 2+ Treatment of reverse osmosis concentrated water. The operating conditions are determined as follows: the influent pH value is 3, the catalyst Fe 2+ The dosage is 5mol / L, ClO 2 The dosage is 15mg / L, the residence time of the wastewater in the reactor is 60 minutes, and the residence time of the wastewater in the flocculation tank is 20 minutes. The water quality indicators of the wastewater before and after the reaction are shown in Table 3.

[0033] Table 3 Chlorine dioxide + Fe 2+ Process wastewater quality data

[0034] Raw water COD(mg / L)

[0035] From the data in Table 3, it can be seen that after the wastewater is oxidized, the COD drops below 60mg / L, which meets the discharge requirements.

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Abstract

The invention relates to a method for processing reverse osmosis concentrated water, which comprises the steps of: adding oxidant into reverse osmosis concentrated water to be processed to perform an oxidizing reaction to oxidize organic matters in the concentrated water into carbon dioxide and water, and directly. discharging wastewater after oxidation Compared with the prior art, the method is simple in processing, easy to implement, low in investment and cost of processing facilities, lower in raw water COD, small in dosage of the oxidant and low in processing cost; and in addition, the method is green and environmentally-friendly and does not cause secondary pollution.

Description

technical field [0001] The invention relates to a method for treating reverse osmosis concentrated water, in particular to a method for treating reverse osmosis concentrated water produced in the process of sewage reuse. Background technique [0002] With the development of industrialization in our country, a large amount of industrial pollutants are discharged into the environment, which brings more and more serious pollution to water bodies. Deteriorating water quality not only increases the cost of obtaining water resources for the whole society, but more seriously endangers people's health. The shortage of water resources has become an important factor restricting my country's economic and social development. The use of sewage reuse technology to recycle sewage after treatment can not only save a lot of water resources, but also greatly reduce sewage discharge, so it has become the focus of water conservation and emission reduction for industrial enterprises. [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/72C02F1/52
Inventor 高峰李本高桑军强杨青
Owner CHINA PETROLEUM & CHEM CORP
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