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Method for determining maximum removal rate of dissolved organic matters, addition quantity of coagulant and pH value of effluent during strengthened coagulation treatment of drinking water

A technology for the treatment of dissolved organic matter and drinking water, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., and can solve problems such as few reports

Active Publication Date: 2012-11-14
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these models are aimed at the enhanced coagulation process with artificial pH value control, while the enhanced coagulation process in drinking water plants in my country and most drinking water plants in foreign countries does not carry out artificial pH value control. There are few reports on the model
In addition, most of these models only predict the removal rate of DOM, and there are few reports on the prediction models of dosage and pH value.

Method used

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  • Method for determining maximum removal rate of dissolved organic matters, addition quantity of coagulant and pH value of effluent during strengthened coagulation treatment of drinking water
  • Method for determining maximum removal rate of dissolved organic matters, addition quantity of coagulant and pH value of effluent during strengthened coagulation treatment of drinking water
  • Method for determining maximum removal rate of dissolved organic matters, addition quantity of coagulant and pH value of effluent during strengthened coagulation treatment of drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Embodiment 1, apply the method of the present invention to determine the enhanced coagulation treatment result of Songhua River raw water

[0100] Implementation object: Harbin Songhua River raw water in the Songhua River Basin.

[0101] 1. Model prediction results

[0102] (1) The raw water characterization result is: DOC 0 3.90mg / L, Alkalinity 0 75mg / L, pH 0 is 8.01.

[0103] (2) The results of DOM chemical classification in raw water are: the percentages of HoB, HoN, HoA, WHOA and HiM in the total DOM are 2%, 12%, 47%, 14% and 25%, respectively, and the SHoM% is 61%.

[0104] (3) The prediction results of the three models are shown in Table 1.

[0105] Table 1 Model prediction results of Harbin Songhua River raw water

[0106]

[0107] 2. Experimental results

[0108] The four coagulants are FeCl 3 、Al 2 (SO 4 ) 3 , polyaluminum chloride (PACl) and high-efficiency polyaluminum chloride (HPAC), four coagulants were used to carry out enhanced coagulation ...

Embodiment 2

[0119] Embodiment 2, applying the method of the present invention to determine the enhanced coagulation treatment result of the raw water of the Yellow River

[0120] Implementation object: Yellow River raw water in the Middle East of the Yellow River Basin.

[0121] 1. Model prediction results

[0122] (1) The raw water characterization result is: DOC 0 2.77mg / L, Alkalinity 0 123mg / L, pH 0 The value is 8.29.

[0123] (2) The results of DOM chemical classification in raw water are: the percentages of HoB, HoN, HoA, WHOA and HiM in the total DOM are 4%, 8%, 35%, 15% and 38%, respectively, and the SHoM% is 47%.

[0124] (3) The prediction results of the three models are shown in Table 6.

[0125] 2. Experimental results

[0126] The method is the same as step 2 of Example 1, and the results are shown in Table 6.

[0127] Table 6 Comparison of predicted value and actual value of enhanced coagulation of raw water from the Yellow River in Dongying

[0128]

[0129] The res...

Embodiment 3

[0130] Embodiment 3, apply the method of the present invention to determine the enhanced coagulation treatment result of Xiangjiang River raw water

[0131] Implementation object: Changsha Xiangjiang raw water in the Yangtze River Basin.

[0132] 1. Model prediction results

[0133] (1) The raw water characterization result is: DOC 0 1.59mg / L, Alkalinity 0 90mg / L, pH 0 The value is 7.93.

[0134] (2) The results of DOM chemical classification in raw water are: the percentages of HoB, HoN, HoA, WHOA and HiM in the total DOM are 4%, 4%, 24%, 23% and 45%, respectively, and the SHoM% is 32%.

[0135] (3) The prediction results of the three models are shown in Table 7.

[0136] 2. Experimental results

[0137] The method is the same as step 2 of Example 1, and the results are shown in Table 7.

[0138] Table 7 Comparison of predicted value and actual value of enhanced coagulation of Changsha Xiangjiang raw water

[0139]

[0140] The results show that the predicted value...

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Abstract

The invention discloses a method for determining a maximum removal rate of dissolved organic matters (DOM), addition quantity of a coagulant and the pH value of effluent during strengthened coagulation treatment of drinking water. The method comprises a first step of carrying out a series of characterization on the quality of raw water (i.e., detecting such three routine indexes as dissolved organic carbon, alkalinity and the pH value of the raw water, carrying out chemical fractionation on DOM in the raw water and acquiring the percentage of each chemically fractionated component in the DOM) and a second step of inputting relevant data of characterization of the quality of the raw water into three prediction models and respectively predicting a reachable maximum removal rate of the DOM, desired addition quantity of a coagulant and the pH value of effluent through calculation after strengthened coagulation treatment of the raw water by using four coagulants. The method provided by the invention is applicable to a strengthened coagulation treatment process for drinking water without artificial regulation and control of a pH value.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, and relates to a method for determining the maximum removal rate of dissolved organic matter, the dosage of coagulant and the pH value of effluent in enhanced coagulation treatment of drinking water. Background technique [0002] In recent years, with the aggravation of drinking water pollution and the recognition of disinfection by-products, the removal of organic pollutants has become a prominent problem in the current domestic and foreign drinking water treatment. As we all know, the removal of DOM in drinking water treatment is an important topic, not only because of the complex composition of DOM, but also because of some problems caused by the existence of DOM, such as: causing color and odor of drinking water, supporting bacterial regeneration growth, react with chlorine disinfectants to reduce their concentration, react with chlorine to produce disinfection by-products (s...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/52G01N33/18
Inventor 王东升解建坤陈禹
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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