PROJECT START:

2016 

COMPLETION DATE:

 2017 

PROJECT OBJECTIVE:

Development of a closed-loop wastewater treatment technology with a water treatment plant for a closed–loop system and a stormwater treatment station.

Selection of equipment and materials.

Calculation of project implementation costs. 

Up to 12 months. 

DESCRIPTION OF THE DECISIONS MADE:

According to the plan, the industrial facility is located in an area where the construction of sewers or the establishment of polishing lagoons is not permitted due to the government’s environmental regulations.

The company used an unconventional engineering approach and developed solutions based on the experience of professionals and knowledge gained from the ferrous and non-ferrous metallurgy and chemical industry.

The primary source of water pollution is the tinplate production shop, where wastewater contains galvanic products (iron, chromium, tin solutions), oil, and suspended solid particles.

Our company developed a technological solution for a pre-cleaning process, implemented in seven lines:

  1. Oil concentrates processing line;
  2. Processing line for oil-containing washing water;
  3. Solid-waste recycling line;
  4. Processing line for acidic iron-containing, tin-containing waters and solutions;
  5. Chromium water processing line;
  6. Alkaline water neutralization line;
  7. Final effluent processing line.

Each line is combined into an integrated complex through a pipeline system, where the following processes take place:

  • mutual neutralization of acidic and alkaline waters,
  • separation of water from oil by centrifugation,
  • neutralization of chromium-containing effluents with iron-containing effluents in the reactor.

As a result, a mixture containing non-settling chloride solutions is obtained, which is then subjected to concentration through reverse osmosis units and an evaporation plant.

Before evaporation, the concentrated from the water treatment plant and cleaned from galvanic products wastewater are mixed and undergo concentration in two stages to reduce the load on the evaporation plant.

In this project, the concentration changed 13 times (from 35.5 m3/h to 2.7 m3/h).

As a result of the above-mentioned technological solutions, the company managed to get a complete absence of effluents.

Furthermore, the client’s industrial enterprise got the opportunity to sell by-products to interested companies:

  • Oil with a moisture content of 20%;
  • Cake Fe(OH)3 Cr(OH)3;
  • Iron-containing waste (scale);
  • Cake of СаСО3 and Mg(OH)2 mix;
  • Mineral salts in the mix of Na2SO4 (96,6%) and NaCl (3,4%);
  • Green coke.

ESTIMATED IMPLEMENTATION COST

10 000 000 Euro.

ENGINEERING DESIGN TIME FRAME

6 months.

Check out industrial wastewater treatment services from M HEAVY TECHNOLOGY.

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