News Category: Environmental

Thanks to tighter environmental regulations and greater public awareness, companies are increasingly looking to reduce or eliminate the waste that they produce. In recent years, Zero Liquid Discharge (ZLD) has become an important waste reduction technique, but its potential in dealing with hazardous waste streams has not been fully appreciated until now. One of the…

At WEFTEC 2018 New Orleans, stand 2357, HRS Heat Exchangers will demonstrate the trial version of its unique effluent Concentration System for the first time ever in the US. The trial system enables plant operators to measure how much their effluent waste volumes can be reduced before committing to a full-sized system. With the trial-size…

When treating wastewater, sludge and digestate, it can be beneficial to reduce the volume of material or increase the solids content. Mechanical dewatering via a centrifuge or belt press to separate solids and liquids is standard for the water treatment and anaerobic digestion sectors – but what if you want to further reduce the water…

At UK AD & World Biogas Expo 2018 stand D603, HRS Heat Exchangers will showcase its novel Digestate Concentration System (DCS), which increases the dry solid content of digestate three-or four-fold, typically to between 10-20 per cent. By reducing the liquid fraction and therefore the overall volume of digestate produced, the DCS minimises the economic…

Heat exchangers are widely used across a range of industries, including food manufacturing, chemical processing, water treatment and renewable energy production.  As well as basic heating and cooling, they are used for a wide range of other processes including pasteurisation, sterilisation, crystallisation and evaporation. With so many uses, and an almost infinite number of materials…

The use of biomethane as a transport fuel is an exciting prospect, but to date development of the necessary infrastructure in the UK has been disappointing. A report last year¹ showed using biomethane could reduce well-to-wheel (WTW) CO2e emissions in road transport by between 35% and 88% depending on the vehicles and lifecycle analysis used….

Zero liquid discharge (ZLD) is a technique whereby liquid waste streams from industrial plants are eliminated. These are instead replaced with clean water, which can be reused in the process, and the minimum amount of solid residues, which often include valuable by-products that can be sold or reused. ZLD is suitable for a wide range…

The last detailed study of heat use in the agricultural industry was carried out almost 10 years ago*, but it showed that UK farmers used almost 2,200 GWh of heat each year, and that heating accounted for 37 % of the total energy used in agriculture. When horticulture (greenhouses and nurseries) are added, these figures…

1. Can you give me an overview of the range of the water/waste analysis/industry sectors you are involved with? HRS Heat Exchangers provides heat exchangers, pasteurisers and Digestate Concentration Systems to wastewater anaerobic digestion (AD) facilities. HRS’ customers and end-users include Southern Water, Severn Trent Water, Welsh Water, Yorkshire Water, Anglian Water, Northumbrian Water, Wessex…

Over the years, different wastewater companies have adopted different approaches to sludge treatment, but there is now a trend towards anaerobic digestion (AD) and away from incineration. In the UK, the number of AD facilities for sludge treatment has grown 12% from 2010-2015. Those 159 plants generated 25% more energy during the same period*. This…