COASTACIA — STP ENGINEERING & CONSULTANCY

Sewage Treatment Plants up to 2 MLD
Engineering • Consultancy • Construction • Commissioning • Comprehensive O&M
Engineering sustainable wastewater solutions from concept to continuous performance.
Coastacia provides specialised engineering consultancy for Sewage Treatment Plants (STPs) up to 2 MLD capacity, supporting clients through the complete project lifecycle—from feasibility and design review to construction supervision, testing, commissioning, performance optimisation and comprehensive operation & maintenance.
Our multidisciplinary approach integrates civil, environmental, mechanical, electrical and operational expertise to deliver wastewater infrastructure that is reliable, efficient, compliant and sustainable.
Our STP Expertise
Coastacia provides end-to-end technical consultancy for 2 MLD-class sewage treatment facilities, including new projects, rehabilitation, capacity enhancement and performance improvement of existing plants.
Our expertise includes:
• STP feasibility and technical assessment
• Sewage flow and load assessment
• Process and technology evaluation
• Design review and engineering coordination
• Hydraulic and process-design review
• BOQ and cost-estimation support
• Technical specifications and tender documentation
• Construction supervision
• Quality assurance and inspection
• Mechanical and electrical installation coordination
• Testing and commissioning
• Process stabilisation
• Performance optimisation
• Comprehensive O&M consultancy
• Preventive and corrective maintenance
• Sludge management
• Treated wastewater reuse
• Environmental compliance and documentation
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From Concept to Continuous Performance
01 — Feasibility & Planning
We begin with understanding the actual wastewater generation, site conditions and performance requirements.
Our assessment considers:
Flow | Load | Site | Technology | Utilities | Treated Water Standards | Sludge | Reuse | Lifecycle Cost
The objective is to establish a technically appropriate and economically viable STP solution.
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02 — Design & Engineering Consultancy

Coastacia provides independent technical review and engineering coordination covering:
• Process configuration
• Hydraulic design
• Biological treatment systems
• Aeration systems
• Pumps and pumping systems
• Mechanical equipment
• Piping and valves
• Electrical systems
• Instrumentation and automation
• Sludge handling
• Disinfection systems
• Treated-water reuse systems
Our emphasis is on designing systems that are constructible, operable, maintainable and energy-efficient.
Image caption:
Process engineering and optimisation for reliable wastewater treatment performance.
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03 — Construction Supervision & Quality Assurance
An STP’s long-term performance depends heavily on the quality of its construction and installation.
Coastacia can provide technical supervision covering:
• Civil and structural works
• RCC treatment tanks
• Waterproofing and leakage assessment
• Equipment foundations
• Mechanical equipment installation
• Piping systems
• Electrical works
• Instrumentation
• Equipment inspection
• Installation quality
• Testing documentation
• Contractor coordination
• Progress monitoring
Built Right. Tested Right. Operated Right.
Our construction-stage involvement focuses on identifying deficiencies early and ensuring that the constructed facility reflects the intended engineering design.
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04 — Testing & Commissioning
Commissioning transforms a completed construction project into a functioning treatment facility.
Our commissioning support may include:
Pre-commissioning → Equipment Trials → System Testing → Process Start-up → Biological Stabilisation → Performance Monitoring
We support:
• Pump and blower testing
• Mechanical equipment trials
• Electrical system verification
• Instrumentation checks
• Pipeline and valve testing
• Control-system verification
• Process start-up
• Biological process stabilisation
• Treated-water quality monitoring
• Performance trials
• Commissioning documentation
Image caption:
Technical inspection and commissioning support for reliable STP performance.
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05 — Comprehensive Operation & Maintenance

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An STP cannot deliver consistent performance through infrastructure alone. Disciplined operation and preventive maintenance are essential.
Coastacia provides consultancy and technical support for comprehensive O&M programmes covering:
Plant Operations
• Daily operational planning
• Flow monitoring
• Process monitoring
• Aeration management
• Pump and blower operation
• Sludge management
• Chemical dosing
• Treated-water monitoring
• Operational logbooks
• Energy monitoring
Preventive Maintenance
• Pumps
• Blowers
• Motors
• Screens
• Mixers and agitators
• Valves
• Electrical panels
• Instrumentation
• Flow meters
• Level sensors
• Dosing systems
• Piping
• Civil structures
Our approach is designed to minimise breakdowns, downtime, excessive energy consumption and premature equipment failure.
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06 — STP Rehabilitation & Upgradation

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Existing STPs may underperform because of inadequate design, ageing equipment, changing sewage characteristics, poor O&M or capacity constraints.
Coastacia can undertake technical assessments to identify:
• Hydraulic bottlenecks
• Process deficiencies
• Equipment deterioration
• Civil-structure issues
• Excessive energy consumption
• Inadequate treatment performance
• Capacity constraints
• Maintenance deficiencies
Based on the assessment, we develop practical strategies for rehabilitation, process modification, equipment replacement, capacity enhancement and operational improvement.
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07 — Treated Wastewater Reuse
Treat. Recover. Reuse.

Coastacia promotes wastewater as a resource rather than merely a waste stream.
Where technically and regulatorily appropriate, treated wastewater can be evaluated for:
• Landscaping
• Gardening
• Flushing
• Construction activities
• Road washing
• Non-potable applications
• Other approved reuse purposes
Effective reuse can reduce freshwater demand and improve the overall environmental performance of a facility.
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08 — Performance Monitoring & Environmental Compliance
Reliable STP operation requires continuous monitoring and documentation.
Coastacia supports structured systems for:
Water Quality Monitoring
Operational Records
Maintenance Records
Performance Evaluation
Energy Monitoring
Sludge Management
Compliance Documentation
Our objective is to help clients maintain a treatment plant that is not only operational, but measurable, auditable and consistently performing.
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Why Coastacia?
With its multidisciplinary engineering approach, Coastacia brings together civil, mechanical, electrical, environmental and project-management perspectives to address the practical challenges associated with wastewater infrastructure.
We do not view an STP as merely a construction project. We approach it as a long-term environmental infrastructure asset whose success depends on appropriate design, quality construction, effective commissioning and disciplined operation and maintenance.
From Concept to Continuous Performance
Feasibility → Engineering → Tender Support → Construction → Testing → Commissioning → Optimisation → Operation & Maintenance → Performance Monitoring
Coastacia supports clients throughout this lifecycle to build wastewater treatment facilities that are reliable, compliant, efficient and sustainable.
Coastacia – Engineering Sustainable Water & Wastewater Solutions
Building better infrastructure through engineering excellence, environmental responsibility and sustainable technology.