Pasupati Acrylon Limited

72 kLD micro-algae based dye decolorisation and COD reduction plant established on dye effluent with very high microbial toxicity.

Company Overview:

  • Pasupati Acrylon Ltd is one of the largest producers of acrylic fiber in the country, with a range of options products ranging from just raw white and bleached fiber to tow-dyed fabric. Recently, the company has established a gel-dyeing unit to produce fabric of a much superior nature.

Inlet Effluent Detail:

  • pH : 2-3

  • TDS : <10000

  • COD : upto 1800 ppm

  • Flow : 72 KLD

  • Colour : upto 2000 Co-pt

  • Microbial Toxicity : Very high

Objectives of Treatment:

  • To remove microbial toxicity so that the effluent can be taken in the existing ASP.

  • To reduce the colour from effluent

  • To reduce the COD load

  • To neutralize pH without any chemical addition

Before Algae Treatment: The effluent was coming from a gel dying plant. The generated effluent was then neutralized by chemicals and then taken into the ASP. Due to high microbial toxicity, the ETP used to get disturbed and due to regular problems in the ETP, the client decided to stop the manufacturing of gel dyed fabric till they managed to manage the gel dye effluent. The client had tried out numerous chemical and biological solutions, but to no avail.

After Implementing the Algae Technology:

  1. Toxicity: The microbial toxicity of the effluent has been removed completely and after removing the toxicity, the effluent is taken into the existing Activated Sludge Process (ASP) of 7800M3.

    • Microbial Toxicity test of raw gel dyeing effluent and microalgae treated effluent was performed against Gram positive (Bacillus Subtilis) and Gram negative (Escherichia coli) . Absence of inhibition zones was observed in microalgae treated effluent against both the organisms, it indicates that microalgae degraded the complex compounds in the Gel dyeing effluent which exerts microbial toxicity.