Energy from Waste Plant - Process Water Drainage Design
Process Water Drainage Design – Energy From Waste Plant (Orsted Rensscience EfW)
Beta Design Consultants were appointed by the client to review the existing system for the closed loop process water drainage. The facility was one of a kind, processing municipal waste (black bin bags) for more than 25000 properties using the anaerobic digestion process.
The Anaerobic Digestion process deals with municipal waste – requiring carefully designed process drainage
Process waste liquids were collected from various locations within the plant, channelled through gravity open drains into an underground system that ends at a sump for pumping back into the system after removing sedimentation.
The existing system was reviewed by Beta Design Consultants engineers and assessed based on performance. Our engineers carried out extensive research in the process area, observing flow and blockages and talking to client process engineers and maintenance operatives on site to understand the bottlenecks, diagnose the shortcomings of the existing layout before proposing any improvements.

Grit separation to extract sediments upstream introduced at various positions in the system
The proposed intervention addressed various issues, through the following approach.
- Widening the channels to standardize flow and reduce flow peaks.
- Changing drain covers to composite type durable and easy to handle type improving maintenance and effectiveness in catching solid waste.
- Introducing grit separation equipment at strategically chosen locations after conducting market research to identify suitable equipment for the flow and layout. This resulted in considerable improvement of the system flow as sediments and grit were extracted early on reducing risk of blockages in the system and also reducing wear and tear in the existing facilities.
- Introducing improved grit/sediment collection baskets from stainless steel at more frequent locations to improve maintenance and reduce sediments load downstream and on the manholes and the sump.
- Introducing high performance concrete HPC as a material for use around all the “aco drains” as these channels were subject to corrosive liquids resulting in the degradation of the surround concrete. Using the durable HPC concrete surround would not only protect the aco drains and their covers but also reduce risk of tripping and accumulation of solids on sides of drains.
- Conducting section by section trials on the proposals to ensure the performance in reality is consistent with the desk-based findings.

High Performance Concrete used as surround concrete on the sides of the ACO drains
Client: Orsted
Location: Northwich, UK
Related projects

BP Deep Water Sump Assessment and Concrete Repair Design
Read More
BP Heater Foundation Concrete Repair
Read More
BP GF Gas Plant Asset Integrity and Refurbishment
Read More
BP GF Gas Plant – Slug Catcher Foundation Walls RC Repair
Read More
Bus Depot Electrification Harrow
Read More
United Downs Deep Geothermal Power Plant
Read More
Action Court Warehouse Extension
Read More
Concrete Strengthening for 8-10 Brindleyplace, Birmingham
Read More
Engine Yard Punching Shear Slab Strengthening
Read More
CPS House Jacketing to Strengthen RC Beams
Read More
Harwell Campus-Concrete Strengthening
Read More
Planning Permission for New Warehouse, Ealing
Read More
Kennedy Institute Extension - Flat Slab Punching Shear Strengthening
Read More
Polybags Ltd Warehouse Extension in Lyon Way
Read More
Orchard House – RC Column Strengthening using CFRP
Read More
Stanmore House Strengthening
Read More
Stage 50 Bovingdon Airfield Studios Civil & Structural Engineering Services
Read More
Design Development of Cité Administrative Koloma
Read More
Coast Drive Visitor Centre, Watersport & Beach Huts - Multi Discipline Consultants
Read More
Structural Assessment of Henley Masonry Arch Bridge
Read More
Northside Garages Structural Investigation & Refurbishment Options Appraisal
Read More
Peckham Arch Condition Survey & Life Extension Consulting Services
Read More
Pembroke Road Footbridge - Principal Inspection, Structural Investigation & Strengthening
Read More
RAAC Investigation and Structural Strengthening
Read More
Concept Design of Sedhiou Bridge and Roads Network
Read More
Spire Academy (Horizon Academy) Car Park Refurbishment
Read More
Stage 50 Wycombe Film Studios Village
Read More
Wycombe Air Park- Data Centre
Read More
Brentford Waterfront Block B and C Temporary Works Design
Read More
Brentford Waterfront Block K Temporary Works Design
Read More
Planning Application for Three Story Residential Building
Read More
Fulham Palace Road Temporary Works Design
Read More
Helmsley Place-Steel Connections Design and Detailing
Read More
Planning Permission for a Basement in a Conservation Area
Read More
One West Point – Design of Support System for Cladding
Read More
Structural Design of 3 Storey Building
Read More
NHS Staff Accommodation for St Peter’s Hospital in Chertsey, Piled Rafts Design
Read More
Grove Park Gardens 4 Storey Residential Development
Read More