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New Process For Sulfate Removal From

Industrial Waters

Process Description

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Step 1 -- Initial Sulfate Precipitation

Step 2 -- Metal Hydroxide Precipitation

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Step 3 -- Final Sulfate Precipitation

Step 4 -- pH Reduction/Recarbonation

Results

Berkeley Pit

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Table 1. Berkeley Pit Bench Testing Results

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Closed Gold Mine

Table 2. Gold Mine Bench Testing Results

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Metallurgical Plant

Table 3. Bench Test Results with Metallurgical Plant Wastewater

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After Lime

After CESR Treatment

Most Stringent

Parameter

Feed Water

Treatment

High Dosage

Higher

Dosage

Discharge

Limits

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3.2

29,100

2,250

337

35,800

3,610

1,260

1,470

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40,200

4,420

2,100

2,060

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bold

Treatment Costs

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Summary