Wastewater Heat Recovery Solutions from Landmark Waste Water Solutions focus on the cost-effective and environmentally responsible management of water. We offer a free desk feasibility study so you have nothing to lose. The potential for you to reduce energy costs and carbon production are very real, even without the requirement of capital expenditure. Get in touch to find out how you can capitalise on wasted energy that is currently going down the drain.

How does Wastewater Heat Recovery work?

Wastewater contains thermal energy, and we can recover some of this energy with Heatpumps.

Using the HUBER ThermWin® system for heat recovery from sewage we withdraw sewage from the sewer low, screen it, pump it through above-ground Heat Exchangers, and then return it back into the sewer.

Because we screen and pump the sewage, we can use compact and cost-effective heat exchangers, wherein we generate a well-defined and turbulent flow for efficient heat transfer.

For screening we deploy the vertical screw screen ROTAMAT® Pumping Stations Screen RoK 4 that is compact and lifts the screening through its vertical auger. Returned sewage flushes the lifted screenings over a chute back into the sewer.

Proven Technology – Exhaust heat?

Wastewater as a heat source for heat pump systems represents a highly efficient energy source and energy sink. Its use is however often limited to big sewer diameters and high flow rates. The exhaust heat of locally generated wastewater is a regenerative and sustainable energy source for the production of service water and heating buildings.

  • The UK’s sewage infrastructure covers 347,000kms of sewer line – predominantly in urban centres.

  • The EU produces 125bn litres of sewage per day – 11 billion litres across the UK.

  • Average temperature of wastewater is 8-15ºC.

  • Typically the energy simply flows down the drain and into sewers unused… Wastewater is a large and untapped energy resource.


The Wastewater Heat Recovery system can be used effectively to heat or cool a multitude of developments.

  • District Heating Systems

  • Residential Developments

  • Public Facilities, eg, Museums

  • Commercial Buildings

  • Industrial Complexes

  • Shopping Centres

  • Hospitals

  • Student Accommodation

  • Hotels

Typical Applications

  • Single Building deployment – leisure centres, office accommodation, etc.

  • Campus Network Deployment – colleges, residences, hospitals, prisons, etc.

  • Cooling for data centres and other buildings that require cooling.

  • Urban Centre Heating and Cooling Network – city centres.

  • Complimentary to ground source – High Efficiency Hybrid.

  • Complimentary to ground/surface water source.

Key Drivers

There are a number of drivers that mean this is the perfect time to look at Wastewater Heat Extraction with us:

  • Climate Change Levy

  • Carbon Tax

  • UK Renewable Targets

  • Energy Savings Opportunity Scheme (ESOS)

  • Ongoing desire to save money on energy

  • Minimal interference – little construction work

Case Study – Sports Hall and Family Centre

A partial flow of wastewater (5 l/s) is taken from a combined sewer running under the premises. The wastewater flow is delivered to a screen for mechanical pre-treatment via a pumping shaft. The effluent from this screen flows by gravity into the heat exchanger and then back into the sewer taking along the screened coarse material. A special feature of this project is that the complete mechanical equipment is mounted in a 20″ container installed above ground.

  • Primary energy demand reduced by 60%.

  • Provides the basic load for heating and hot water production.

  • Use of a regenerative energy source.

Download a copy of this case study for reference.


Here you will find comprehensive information about product applications in various fields.


This collection of HUBER practice reports and case histories exemplifies a multitude of industrial and municipal solutions.

Other Services

Landmark Environmental are experts in the responsible management of water and energy. Please visit our sister website for more information about our Water Solutions, Energy Solutions and Training Solutions.

Free Desk Study Report

Our Wastewater Heat Recovery Process begins with a free, no obligation desk study report. We will analyse your energy bills, current carbon consumption and show you top line potential cost savings. Get in touch to discuss this with us.

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