phase of environmental project (from tendering to construction)

Project Phases (Environment)

By Harush D P

Process Design Engineer

harush.24u@gmail.com

Environment• Comprises of our surroundings• Air• Water• Soil• others

Pollution

Human activities Deforestation Industrialization Uncontrolled Discharges

Water Treatment

Domestic sewage Industrial Effluent Drinking water treatment

Type of treatment

Primary treatment Secondary Aerobic Anaerobic Anoxic Tertiary

Projects

Drinking Water Treatment Projects Jackwell, pipeline and ESR construction for water supply Water supply Networking Sewage Treatment Plants UGD for cities Industrial Effluent Treatment projects CETP Operation and Maintenance

Tender

Prepare tender document by reputed consultants Government Bodies call for tenders Specify Requirements Floats tender via various Media Calls for bidding

Tender Contents

Important Dates Scope of work PRQ Pre-bid Details Technical Details Financial details (project Estimated cost) Bidding process Cost Breakups

Working Process Design (units its sizing and Process flow drawing) Civil Estimation ( Quantities) Mechanical Estimation ( Equipment's, Pipes, Valves,) Instrumentation Estimation ( Scada Design and Estimation) Electrical Estimation ( Power Requirement, Costing) Operation and Maintenance ( Labor, Chemical, Power Requirement

Etc) Over all cost calculation Cash flow preparation Construction schedule preparation. E-Portal Submission of Documents and EMD

Notifications

After successful submission check for regular notification. Date of opening of Technical BID. Date of opening of Financial BID. Lowes BID qualification. Award of contract.

Project Phases Preparation of Technical Documents Getting approval from consultant and client. Process Design calculations Mass Balance Hydraulic Design Calculations Drain Calculations Plant Water Utility Datasheet for mechanical Equipment's Structural Design calculations

Drawing Approvals PFD Layout Hydraulic Flow Drawing Mass Balance P&ID Mechanical GA Equipment GA Civil GA Structural Drawing

Mean while at site Topographical Survey Completion Site Mobilization Site Clearing Compound Structure Drainages Excavations

Site Progress

After approval of drawings construction commences. As per Planned Construction Schedule. Getting Release of RA Bills as per the progress of work. Hydraulic Testing of Structures Mechanical Equipment's Installations Testing of Equipment's Completion of work and trial run

Operation and Maintenance

Flow measurement Inlet Parameter Analysis Stabilize the STP Culture Development Chemical Dosing Achievement of said outlet parameter Trouble shooting

Design Glimpse Analyze the type of effluent to be treated Collect population density of area and sources of waste generation Collect Flow quantity (hydraulic Loading) Collect Effluent Quality parameters (Organic Loading) Analyze and plan process design units Collect standards required from Standard Manuals (CPHEEO) Collects Requirements Specified by Client Collect Area Available for construction and inlet point of effluent

Designing A sewage Treatment plant will be designed with following flow SPS (sewage Pumping Station) MPS (Main Pumping Station) STP (Sewage Treatment Plant) Disposal of Treated Sewage Treatment Of Sludge and its Disposal

MPS (Main Pumping Station) Why ? Units Inlet chamber Course Screen Channel Wetwell Pumps and pumping main

STP Receives Flow from MPS/ISPS Units Inlet chamber Fine screen Channel Grit Chamber Flow Measurement Secondary Treatment unit (SBR, ASP, MBBR,)(Digester, Trickling Filter

etc) Clarifier Disinfection unit (CCT) Disposal or Tertiary treatment

Sludge Treatment

Sludge Sump Gravity Sludge Thickener (GST) Sludge Digester/Sludge Holding Tank Gas Holder, Power Generation units Centrifuge/Belt Filter Sludge Cake Disposal

Wet well construction

Illustrative photos

Digester lamella clarifier, Biotower

Aeriation Tank

Anaerobic tanks

Complete plant, Digesters and gas holders

Thank you