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Monday, November 13, 2017

PRIMARY EFFLUENT TREATMENT PLANT (PETP)

PRIMARY EFFLUENT TREATMENT PLANT (PETP)


PARAMETERS OF TREATED WATER for HOTELS , HOSPITALS and other industries currently accepted by Pollution Control Board of Assam. (PCBA)

The parameters of the treated effluent water will be  as under meeting norms of Pollution control Board (PCBA) .
pH Between 5.5 to 9
TSS (Total suspended solid below 150 mg/liter
BOD( Biological oxygen demand) less than 30 mg/liter
COD(Chemical oxygen demand) less than 250 mg/liter
Oil & grease less than 10 mg/liter



IF WASTE WATER FROM HOTEL, HOSPITAL EXCEEDS THE ABOVE VALUE, ONE PETP IS TO BE INSTALLED FOR TREATING WASTE WATER AND BRING IT WITHIN LIMITS MENTIONED ABOVE.

Our Consultancy & Supervision scope:
We offer our  work on consultancy basis for the Hotels ,hospitals, restaurants, wedding hall, ccar service station, tea garden and other industries. . All the civil & execution work will be done by the respective Hotel  , under our guidance from initial survey to the final report submission to the Pollution Control Board of Assam (PCBA).
1.Preparation of  drawing as per site condition for each location of hotels , it’s size , their  complexity and need of the hotel   . Thus there is no common solution for all hotels if Customized concept is adopted ,  So will  provide customized system plant for each site. Also, at various sites there are exiting septic tanks and other tanks ,pipes etc which can be adjusted in our proposed system which will reduce construction cost.
2 . We shall Provide a Flow Chart & project  report for submission to the PCBA
3.We will supervise the progress of the civil works during construction time of the ETP.
4.We will provide you a list of  dealers from where you can buy the pump , blower and chemicals.
5..We will train your staff for first 3 days how to run the plant & provide a maintenance manual for the plant
6. We will provide a first  water test report to be submitted to pollution board
7. We shall help in filling of the Documents to be submitted to the PCBA . All the legal fees & dues needs to be cleared by the client . The extra cost for Consent to operate or NOC is not included in the Consultancy

DATA REQUIRED:
a)Quantity of waste water generated liter per day
b) Waste Water test report .
.

TREATMENT METHOD OF PETP:

Chemical pre treatment followed by filtration



Flow Chart of PETP:

IN-Screen—Oil Trap---Collection Tank---Primary Sedimentation--— ------Disinfection Tank—Pump---Filter ----Out to drain



Details of different units of the proposed system


A)CHEMICAL TREATMENT OF WASTE WATER IN PETP

a)    Screen   :Waste water will flow through these drains by gravity flow from the inlet manhole. To remove large floating objects , bar screens and oil traps are provided inside the incoming drain itself .
b)    Collection tank: All waste water will be collected here .Lime and Alum will be added here and mixed by air bubbling from a air blower..Waste water will flow by gravity to the next unit.
c)    Primary Sedimentation tank(PST): The chemical sludge will be settled here. Waste water will flow by gravity to the next unit. Sludge is removed by sludge pump to sludge drying beds.



d)Disinfection tank : Disinfection is done here with bleaching powder to remove colour,  bactaria and other contaminants and  than pumped  to the pressure sand filter and finally released to drain.



3 comments:

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