Elaboration of a lowturbid colored waters purification technology

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Elaboration of a low-turbid colored waters
purification technology

• Applicant Ecology and Environmental Management
  Chair of MSTU

2
Projects objectives and actuality

• Drinking water treatment technology, used now in
  the purification plants of the Murmansk Region,
  foresees the use of aluminum sulfate as
  coagulant. Aluminium sulfate usage by low-turbid
  colored water purification has both its positive
  and negative sides.
• Rather low coagulation efficiency at low
  temperatures, as well as water corrosivity
  increase should be considered as negative
  characteristics of this process.
• The aim of the project is to optimize the reagent
  natural treatment technology in the Murmansk city
  and Murmansk Region

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Methods

• Selection of the effective coagulants,
  flocculants
• Optimal reagent doses determination,
• Optimal operating practices selection
• Operating practices correction of the natural
  water reagent treatment by the industrial testing
  at the water preparation station with the
  selected coagulants, flocculants

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Preliminary results

• At the first stage of work the selection of
  natural sorbent that provides maximal extraction
  of dissolved organic substances was carried out.
  Contrastive analysis of sorption qualities of
  schungite, vermiculite and copper-nickel slag was
  conducted in real natural waters.
• The efficiency of adsorption process was
  estimated by permanganate oxidation. Received
  results are shown
• in the chart.

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Efficiency of adsorption process estimation
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• As we can see from the received experimental
  material schungite has the largest sorption
  ability regarding organic pollution of water.
• The efficiency of organic substances extraction
  from waters of Lavna river is 70.3, Bolshoje
  lake 89.9, Pervoje lake 71.3. Color of
  treated water had the following quantities 19.2
  deg., 16.1 deg., 19.8 deg.

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Expected results

• Proposed drinking water treatment technology
  shall provide
• Treated water color decrease
• Treated water corrosivity decrease