Wastewater

Case Study Neutralization of Alkaline Wastewater

Neutralization of caustic wastewater with flue gas - Textile Industy

Up to now, a textile mill in India has been using sulphuric acid to neutralize caustic wastewater. To reduce the high purchasing costs of sulphuric acid, the process is converted to neutralization by flue gas. Typical of textile industry, the amount of flue gas required can be taken from the power and boiler house at no costs.              

Process:

Neutralization by flue gas

Type of wastewater:Caustic effluent from mercerizing and dyeing
Basis of design:

Replacement of 15.7 kg/h sulphuric acid 98 % (376 kg/d)

Commissioning:

2012

Neutralization tank:
Existing equalization tank, volume 6,500 m³
Equipment:

1 x FUCHS CENTROX Aerator for Flue Gas CX-G 4.0

rated power 5.5 kW

           

Photos

Information

Information

  • To follow the varying water level the FUCHS CENTROX Aerator for Flue Gas is mounted on a flotation. This leads to constantly high flue gas transfer even at varying filling levels.
  • The aerator is self-aspirating. Additonal blowers for the flue gas are not required.
  • Measurement and control devices are not necessary. The physical-chemical behaviour of "carbonic acid" prevents acidification of the wastewater. Below pH = 7.5 carbon dioxide is only minimally dissolved  and outgassed instead.

Products

FUCHS CENTROX for Flue Gas
Cost-effective neutralization of alcaline wastewater

Solutions

Neutralization of Alkaline Wastewater
Cost-effective neutralization of alcaline wastewater

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