Sewage Treatment Plant

The sewage treatment plant is designed to treat wastewater generated from the processing unit. The treatment plant will have two distinct sections namely Fluidized Bed Bioreactor Biological Treatment and Electro coagulation Treatment Plant. The Effluent treatment plant is designed to treat 2,000 m3 of Textile Dyeing effluent generated from the process house. The plant will be capable of operating at the flow rate of 100 m3/hr. The operating cycle of the plant shall be 20 hours.

Sewage Treatment Plant Characteristics

The Sewage Treatment Plant is designed based on the analysis of effluent analysis report of Combined Effluent provided by you.

CharacteristicsValue
PH                           12
Suspended Solids                           250 mg/L
BOD 5 days 20 Deg C                           500 mg/L
COD                           1200 mg/L
COLOUR                          400 (Hazen)
Total Hardness                           200 mg/L
Silica

 

Sodium

                           30-50 mg/L

 

2000-3000 mg/L

Chloride                           1500-2500 mg/L

Sewage Treatment Plant Approach

The Sewage Treatment Plant scheme is selected based on years of experience in handling similar kind of wastewater. The biological treatment plant is designed based on the Fluidized Bed Bio-reactor & Electro coagulation system is used after the Biological treatment. The following treatment scheme is proposed for your requirement:

Combined Effluent Treatment Plant

Primary Treatment

  • Bar screening – 3 stages.
  • PH correction
  • BOD & COD removal by Fluidized Bed Bio-reactor
  • Secondary Clarifier

Secondary Treatment

  • Electro coagulation process
  • Flash mixer
  • HRSC Clarifier.
  • Sand Filter

Sludge Management

  • Sludge thickner
  • Screw pump
  • Filter press
  • Sludge storage

Treated Water Quality

The treated water quality at the outlet of the respective plant will be as    follows:

After Biological treatment plant

ParameterValue
PH7.0 – 8.0
BODLess than 100 ppm
CODLess than 200 ppm
COLOUR300 (Hazen)
Suspended Solids250 ppm
Total Hardness50-100 ppm
Silica30-50 ppm
Sodium2000-3000 ppm
Chloride1500-2500 ppm

After Electro coagulation and Filter Press

ParameterValue
PH6.5-7.0
BODLess than 30 ppm
CODLess than 100 ppm
COLOURLess Than 10 (Hazen.) / 50 PtCo unit
Suspended SolidsLess then 5 ppm
Total Hardness50-100 ppm
SilicaLess then 2 ppm
Sodium2000-3000 ppm
Chloride1500-2500 ppm

Scope of Supply

S.NoDescriptionquantity
COMBINED EFFLUENT TREATMENT PLANT

 

Primary Treatment

1.0Acid dosing pump of PP construction2 nos (1W + 1S)
2.0Air blower with accessories5 nos( 3w+2S)
3.0Fine Bubble Vertical Diffusers.600 nos
4.0FBBR Random Bio-Media8.4 Million Pcs.
5.0Effluent Feed Pumps2 nos. (1W + 1S)
6.0Secondary Clarifier Mechanism1 set
7.0Sludge Re-Circulation Pump.2 (1W +1S)
8.0Motorised Rotary Bar Screen2 SETS.
Secondary Treatment
1.0Electro coagulation skid3 nos (2W + 1S)
2.0Polymer dosing pump of PP construction2 nos (1W + 1S)
3.0Flash mixer1 set
4.0Effluent Feed Pumps4 nos (2W +2S)
5.0HRSC Clarifier Mechanism1 set
Sludge Management
1.0Screw pump2 nos.
2.0Filter press1 no.
INSTRUMENTS
1.0PH indicator & controller1 no.
2.0Level controller4 nos
3.0Temperature indicator2 nos
4.0On-Line DO meter1 no
5.0Inverter for Effluent Pumps2 nos
6.0Inverter for Aeration tank Blowers2 nos
7.0Lab Accessories1 set
8.0Digital TDS meter1 no
9.0Digital Portable pH Meter1 no
10.0Digital Portable DO Meter1 no

AUTOMATION PANEL

1.0ETP panel with PLC and D.C. pulse Power controller from CROSBY Controls, UK., Inverters and control Accessories. 3 SETS.
2.0ALARM ANNUNCIATOR PANEL1 SET
3.0OPTIONAL :  SCADA SYSTEM WITH CENTRALISED CONTROL SYSTEM WITH COMPUTER INTERFACE AND SOFTWARE.1 SET.

Technical Specification

Effluent treatment plant

DescriptionSpecification
MOTORISED ROTARY Bar Screen
Qty2 NO
Material of constructionSS
TypeMotorised
AIR BLOWER FOR EQUALISATION TANKS
No of offered2 nos (1 w + 1s)
Capacity1000 m3/hr @ 5000 mmwg
HP/RPM25.0/1440
TYPETRI LOBE
BRANDDRESSER ROOTS, USA.
AIR BLOWER FOR AERATION TANKS
No of offered3 nos (2 w + 1s)
Capacity1500 m3/hr @ 5000 mmwg
HP/RPM40.0/1440
BRANDTRI LOBE
BRANDDRESSER ROOTS, USA.
Diffusers for BIOLOGICAL TANK
Type of diffusers providedFine bubble
No of offered600 nos
Material of constructionEPDM
Size of diffusers100 mm dia * 225 mm long
BRANDIFU, GERMANY
acid DOSING SYSTEM
No of pumps offered2 nos
Capacity100 LPH
Material of constructionPP
BRANDSurya
TypePlunger
Pressure4 bar
EFFLUENT FEED PUMPS TO aeration tank
Qty2 NOS (1W + 1S)
Material of constructionCI
HP10
FLOW100m3
BRANDJOHNSON / KIRLOSKAR
          BIO  SLUDGE RE-CIRCULATION PUMP
QTY2 NOS (1W +1S)
MOCCI
HP3.0
FLOW25m3
BRANDJOHNSON / KIRLOSKAR
                        SECONDARY CLARIFIER MECHANISM
MOCMS WITH EPOXY COATING
POWER5HP
DISSOLVED OXYGEN METER
TYPEON-LINE
BRANDINSTRONIX
OUTPUT TO INVERTER4-20mA.
QTY1 no

Secondary Treatment

electro coagulation system
No of offered5 nos (4W + 1S)
Capacity25 m3/hr each
EC SKID MOCFRP
ElectrodesMS
flash mixer
No. of mixer offered2 no
HP & RPM2 HP / 100 RPM
BRANDROTOMOTIV, ITALY
HRSC CLARIFIER MECHANISM
MOCMS WITH EPOXY COATING
POWER5 HP
INVERTER FOR FEED PUMPS
RATING7.5KW /10HP.
BRANDYASKAWA, JAPAN
QTY2 nos
INVERTER FOR AERATION TANK BLOWERS
RATING30KW /10HP.
BRANDYASKAWA, JAPAN
QTY2 nos
FEED PUMPS for ec skid
No offered2 nos (1w +1s)
Capacity100 m3/hr each
Head10 mwc
Motor HP10
Material of constructionCI
FEED PUMPS for SAND FILTER
No offered2 nos (1w +1s)
Capacity100 m3/hr each
Head10 mwc
Motor HP10
Material of constructionCI

Sludge Management

SLUDGE THICKNER
No of offered1 no.
MATERIAL OF CONSTRUCTIONM.S WITH EPOXY COATED
POWER1 H.P
fILTER PRESS
No. of offered1 SET
SIZE800MM X 800MM
NO. OF PLATES40
MOSPP
MICRON SIZE15
MOTOR H.P3

SCREW PUMP

NO.O F OFFERED2 NOS.
POWER7.5 HP
CAPACIY10 M3 / Hr
TypeScrew
Pressure10 Bar
MOCAlloy steel & EPDM
pH CONTROLLER
RANGE1-14
BRANDCOUNTRONICS
OUTPUTRELAY
DISPLAYLED DISPLAY
LEVEL CONTROLLER
BRANDMINILEC
TYPEHIGH / LOW
QTY4 NOS
TEMPERATURE INDICATOR CONTROLLER
RANGE0 -200’C
DISPLAYLED DISPLAY
OUTPUTRELAY
BRANDSELECTRON
DIGITAL PH CONTROLLER
RANGE0 – 14
DISPLAYLED DISPLAY
OUTPUTRELAY AND 4 – 20mA.
BRANDCOUNTRONICS
ON LINE DO METER
RANGE0 – 20
DISPLAYLED DISPLAY
OUTPUTRELAY
BRANDINSTRONIX

Schedule of Exclusions

  • Our supplies will be restricted to the items included in the technical data. The list of exclusions from our supply is given below:
  • All civil works like storage tank, foundation for mechanical equipment, control room etc.
  • All types of electrical works like motor control center, switch gear panel, local push button starters and all kinds of power cabling to the motors, motor starters, MCC panel, earthing etc.
  • Piping/ drains of the plant and interconnecting and Air distribution pipelines.
  • All consumables like power, effluent, chemicals and lubricants required for initial start-up and normal operation of the plant.
  • Storage tanks for Acid, and Polymer.
  • Unloading, handling and safe storage of the materials at site.
  • Testing facility for testing raw and treated effluent.

Electrical Drives

The following are the list of electrical works required to be carried out by the client .  CONFIDENT will furnish list of drives, HP ratings and layout.

Effluent Treatment Plant – Primary Treatment

DESCRIPTIONWORKING

 

HP

STANDBY

 

HP

Air blower10565
Acid Dosing Pump11
Feed Pump1313
Secondary Clarifier1
TOTAL12074

Effluent Treatment Plant – Electro coagulation system.

DESCRIPTIONWORKING

 

HP

STANDBY

 

HP

EC skid6030
Polymer dosing pump11
EC feed pump1010
HRSC Clarifier3
Filter Press3
Filter Feed Pump1010
TOTAL8751

 

Package Sewage Treatment Plant Cost

Our Package Sewage Treatment Plant Cost for design, engineering and supply of mechanical items for the following will be as given below:

Electro Coagulation system with Activated Sludge Process Bio-Reactor treatment plantUSD
PRICE BASISC&F CHITTAGONG
DELIVERYWITH IN 75 DAYS FROM THE DATE OF L/C.
PAYMENTBY 100% CONFIRMED IRREVOCABLE L/C AT SIGHT.
VALIDITY30 DAYS.
WARRANTY1 YEAR AGAINST ANY MANUFACTURING DEFECTS.

TERMS, CONDITIONS AND RESPONSIBILITIES :

RESPONSIBILITIES OF CONFIDENT ENGINEERING INDIA PVT LTD (SUPPLIER) ARE AS FOLLOWS.

SUPPLY OF THE ALL THE EQUIPMENT AND PARTS AS AGREED IN THIS CONTRACT.

DESIGN AND DRAWING OF CIVIL LAY-OUT AND PIPE LINE DRAWINGS AND CO-ORDINATE WITH THE CIVIL ENGINEER NOMINATED BY M/S.AUTO TEXTILE LIMITED.

SUPERVISION OF THE EXECUTION OF THE CIVIL AND PIPE LINES.

ERECTION AND COMMISSIONING OF THE PLANT.

TRIAL RUN AND TRAINING TO THE OPERATORS.

RESPONSIBILITIES OF CLIENT ARE AS FOLLOWS.

EXECUTION AND COMPLETION OF CIVIL WORK.

SUPPLY AND EXECUTION OF PLATFORMS, RAILS AND ACCESSORIES.

SUPPLY AND INSTALLATION OF ALL PIPE LINES AND ACCESSORIES.

SKILLED AND UNSKILLED MAN POWER FOR THE EXECUTION OF PIPELINES AND INTERCONNECTIONS.

SKILLED AND UNSKILLED MAN POWER FOR UN LOADING, INSTALLATION OF EQUIPMENTS, ELECTRICAL CABLING, PLUMBING, WELDING AND MANUAL WORK, WHENVEVER AND WHEREVER NECESSARY.

RETURN AIR TICKETS, LOCAL TRANSPORT AND BOARDING AND LODGING FACILITIES FOR THE ERECTION ENGINEERS FROM CONFIDENT.

SUPPLY OF CHEMICALS, LAB TESTING ARRANGEMENTS AND OPERATORS TO RUN THE PLANT.

SUPPLY OF PEBBLES AND GRADED SAND FOR SAND FILTER.

SUPPLY OF COW DUNG, UREA, DAP, MOLASES / SUGAR / STARCH FOR DEVELOPING BACTERIA CULTURE.

FLOW DIAGRAM

etp flow chart


Package Sewage Treatment Plant Cost

OPERATING COST OF ETP FOR 2000M3 / DAY.

SL.NODESCRIPTIONCONSUMPTIONUNITCOSTAMOUNT
1POWER145X 20HRSKWHTk.2.5Tk.7250
2.ACID200LITRETk.10Tk.2000
3.POLYMER2KGTk.400Tk.  800
4.MAN POWER4 Tk.150Tk.  600
5.ELECTRODE40KGTK.80Tk.3200
      
                                      TOTALTk.13850

OPERATING COST FOR 2000M3 OF EFFLUENT TREATMENT IS Tk.13850/-

Package sewage treatment plant cost per m3 of effluent treatment is tk. 6.92/-