Sewage treatment project project test report
7 calcium sulfate sinking tank  Φ 3 × 4 1 5 5 steel plate coated with epoxy resin
8 calcium sulfate slurry pump
9 copper slag filter 1 10 10
10 exhaust equipment 1 1 1
11 flocculant added equipment
12 infusion pump 7.5M3/H 1 1 1
13 pipelines, civil works and acid power 5
14 small       Meter 40
V. acidification precipitation method estimates economic Wastewater
  The economic benefits of acidification and precipitation treatment of wastewater include two aspects , one is the cost of treating wastewater, and the other is the income of the recovered material .
1. The cost of wastewater treatment by acid precipitation method ( unit: yuan / M 3 · million )
 Serial number  project          unit    Quantity     unit price      Amount    Remarks
1 sulfuric acid kg/M 3 6 0.8 4.8
2 lime           〃 10 0.4 4.0
3 polyacrylamide     〃 0.05 35 1.75
4 power consumption kwh / M 3 3 0.6 1.80 total installed capacity is 20KW
5 other 3.0 filters, etc.
6 labor 9 people × 20 yuan / day
70% off old fee 1.0 10 years old depreciation
6 subtotal 18.18
2. Acidification precipitation method recovery value ( yuan / M 3 )
 Serial number  project          unit     Quantity     unit price      Amount   Remarks
1 Copper in copper slag kg/M 3 0.75 15 11.25
2 recovery of cyanide     〃 1.8 14 25.2
3 recovery gold g/M 3 0.02 75 1.5
4 subtotal 37.95
   The economic benefits of acidification and precipitation treatment of wastewater :
   Recovering the value of useful substances in wastewater by acidification and precipitation method - total cost of acidification precipitation method
=37.95 — 18.18 =19.77 yuan / M 3
   According to this calculation , the annual production of 320 days , can be profitable 630,000 yuan . Less than one year will be able to recover all equipment investment .
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