Case Study Ion Exchange

Bio-augmentation of existing ETP:

  1. CLIENT: ION Exchange( India) Ltd. Ankeleswar
  1. PLANT DETAILS: The plant consists of

1)  Primary Settler 2) UASB 3) Lamella Clarifier 4) Pre-aeration Tank 5) Aeration Tank 6) Aeration Tank 7) MBR and 8) Filtration.

The waste water generates from the process plant contains traces of Methanol, Formaldehyde, Styrene, Trimethyl Amine, Dimethyle Amine etc. apart from Gelatin and Cellulose and the other impurities. This indicates the complexity of the carbon source in the wastewater.

  1. RATIONALE: When Bio-augmentation of Rialto was taken up the following problems were observed.
  1. i) Its MLSS level found very high (In the range of 14200-15000ppm).
  2. ii) Settling characteristics was very poor.

iii) Air distribution was not proper thus created lot of dead zones.

  1. iv) Not getting the desired COD reduction.
  1. ACTION TAKEN: The bio-augmentation started and to take control over plant the activities were done slowly to allow the time of acclimation of the consortium as per the guideline provided by Clover. Addition of simpler carbon (in the form of Molasses) was recommended at the initial stage of acclimation for better growth.
  1. e. RESULTS AND DISCUSSION: MLSS level increased, water treatment improved, but excess sludge which was supposed to be drained out, it was not being handled due to inadequate sludge handling facility. It was created to maintain the MLSS in and around 9000-10000 ppm where it was observed that the load reduction is optimum and consistent. Elimination of dead zone was done by adjusting various valves. The COD Load reduction figures before bio-augmentation and after bio-augmentation bah been presented below from where it is clear that even in that complicated waste water Nature Vel-WW is effective and produces a consistent result by doing an improved Average COD reduction by around 8%.