PROJECT ON :
Efficiency Assessment of Aeration Tank. A Case study in a paper and pulp industry, Unit: Tribeni. Report for partial fulfillment of M.Sc in Environmental Science of University of Kalyani.
Presented by:
Priyabrata Roy. M.Sc, 4th Semester Department of Environmental Science University of Kalyani. Email:
[email protected]
Industry is one of the major source of Waste Water in this civilized era. It is continuously polluting our environment. Minimization of pollution load of discharging waste & waste water is the primary goal. Most effective treatment for this purpose is Effluent Treatment Plant installation in the industry. I have carried out my project at a Paper and pulp industry, Unit: Tribeni. I have chosen this because: Paper industry is under RED category Industry. Discharging huge amount of waste water. Aeration process & activated Sludge Treatment are being followed by the industry.
My aim is to study The Efficiency of Aeration Tank operation & The Overview of Environmental management System at the Paper mill, Tribeni. To achieve the aim following objectives are taken: Understanding the Papermaking process. Effluent Treatment Plant Operation. Assessment the efficiency of Aeration Tank & its further modification. EMS
Study Area &Unit Profile Industry Unit: Tribeni is set up near the bank of Hooghly river, under Chandrahati G.P.2
•A Specialty Paper Mill •Three Paper Machines ( PM:1,3&4) •Production 2012-13: 30387 MT •Annual Turnover = $ 240 Million •Certified ISO 9001, ISO14001 and OHSAS 18001
Specialty Papermaking Process.( Flow Chart) Head box
Imported pulp & Broke paper.
Refilling & Rewinde r
Forming & Press Section Refiner
Robbin Slitting
Drier & Calender.
Despatch
Packing
Following Wastewater Treatment has been adopted by the paper mill.
Classification of Methods
Physical Processes
Chemical Processes
Biological Processes
Screening Equalization Tank Sedimentation
Alum Dosing Chlorination
Aerobic Waste Water Treatment( Aeration Tank).
ETP Operation Flow Chart. Waste water
Bar Screen
Equalization Tank
Primary Clarifier
Clarifloculator
Final Clarifier (1&2)
Secondary Sludge
Discharge.
Return Sludge
Aeration Tank
Primary Sludge
A GENERAL STRUCTURE OF CLARIFIER
ETP Plant Picture.
Sampling Site.
Target Set by Paper Mill to maintain effluent discharge…. Name of the Parameter.
WBPCB Benchmark.
Concentration in Waste Water.
pH
6.5-8.5
6.5-8.5
DO (mg/l)
3.5-4.5
3.0-3.5
MLSS (mg/l)
2000-4000
1500-3500
MLVSS
Unknown
60
SVI