Electroplating wastewater treatment_Chennan certain company case

client	Hunan Certain Co., Ltd.	date	April 15, 2013
Water quality before treatment: 1. Take 100ml of raw water and measure PH=4 2. Dilute 10ml of raw water into 100ml, and measure the copper ion on the online monitor to get 3.10mg/L, which is 31.0mg/L of raw water containing copper.
Experimental agent: 1. Weigh 5gPAC and dissolve it in 100ml of water to make a 5% solution. 2. Weigh 5g NaOH, dissolve in 100ml water, and prepare a 5% solution. 3. Weigh 5g of the recapture agent RS100, dissolved in 100ml of water, and formulated into a 5% solution. 4. Weigh 0.5g PAM, dissolved in 1000ml water, and formulated into a 0.05% solution. Experimental program: 1. Take 500ml of raw water, add 2ml of 5% NaOH to adjust the pH to 7.0, add 5% heavy metal collector RS1002.2ml, react for 5 minutes, add 5% PAC 1.4ml, react for 5 minutes, add 1ml under slow stirring 0.05% PAM, reaction for 2 minutes. Precipitate for 30 minutes. The supernatant was taken to measure copper ions to be 0.04 mg/L. 2. Take 500ml of raw water, add 7ml of 5% NaOH to adjust the pH to 7.0, (at this time, the acid water is discharged in the upper step, so the amount of alkali is increased), add 5% heavy metal collector RS1001.8ml, 5 Minutes, add 5% PAC 1.4 ml, react for 5 minutes, add 1 ml of 0.05% PAM with slow agitation, and react for 2 minutes. Precipitate for 30 minutes. The supernatant was taken to measure copper ions to be 1.31 mg/L. After one hour, the supernatant was filtered, and the copper ion was 1.51 mg/L. 3. Take 500 ml of raw water, add 7 ml of 5% NaOH, adjust the pH to 7.0, and precipitate for 30 minutes. Dilute 10ml of raw water into 100ml, and measure the copper ions on the online monitor to obtain 0.77mg/L, which is 7.70mg/L of raw water containing copper. Experimental results: 1. When the ratio of heavy metal collector RS100 to copper ion is 7.09:1, the copper ion content can be made 0.04 mg/L. 2. When the ratio of heavy metal collector RS100 to copper ion is 5.80:1, the copper ion content is 1.31 mg/L. 3. If the two-step method is adopted, it can be calculated based on the experimental data of October 15, 2012: in the case of copper content of 31.0 mg/L, the amount of heavy metal collector RS100 per ton of water can be 100.4 g.
cost analysis: Cost using one-step method: (yuan/ton wastewater) (raw water PH=4) Heavy metal collector RS100: 0.2kg * 17 yuan / kg = 3.4 yuan PAC 0.28kg1.6 yuan/kg =0.448 yuan NaOH 0.2kg3.8 yuan / kg = 0.76 yuan PAM 0.002kg24 yuan / kg =0.048 yuan Subtotal 4.656 yuan The cost of using the two-step method: Heavy metal collector RS100: 0.1kg 17 yuan / kg = 1.7 yuan PAC 0.14kg1.6 yuan / kg = 0.224 yuan NaOH 0.2kg3.8 yuan / kg = 0.76 yuan PAM 0.002kg*24 yuan / kg =0.048 yuan Subtotal 2.732 yuan This is the preliminary judgment from the experiment. According to the use of heavy metal collector RS100 in other enterprises, in the production process, through various factors to adjust and optimize, often the cost will be lower.

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