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Description: Heating Trends
Heating Trends
Water resource recovery facilities treat wastewater to deliver safe water and biosolids back into the environment. The disposal and potential reuse of these solids has been evolving since the 1960s ... Reducing pollution by making a useful product clearly enhances the sustainability credentials of any public or private sector operation. But in a world of evolving threats to public health and unstable economic developments, how will water resource recovery uphold its safety standards while keeping costs under control? Can economic and environmental sustainability go hand in hand?
Author(s)
Mike Weeks
Subjectbiosolids;sustainability;reuse
Document typeMagazine Article
PublisherWater Environment Federation
Print publication date Apr 2021
Volume / Issue33 / 4
Content sourceWE&T magazine
First / last page(s)36 - 39
Copyright2021
Word count1,644
Subject keywordsClass APFASrecyclingthickeningdewateringfertilizerresource recovery

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Description: Heating Trends
Emerging Concerns
Heating Trends
Class A biosolids is the term for wastewater solids that meet U.S. Environmental Protection Agency (EPA) guidelines for land application with no restriction. One potential hazard to the purity of these biosolids has emerged in the form of per- and polyfluoroalkyl substances (PFAS), a group of man-made chemicals that are very persistent in the environment and in the human body. This means they do...
PublisherWater Environment Federation
Copyright2021
Word count230
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Description: Heating Trends
Recycling Options
Heating Trends
After screening, thickening, and dewatering, a thermal drying phase can be adopted to further transform these solids into a more useful product. In addition to substantially reducing the volume of solids requiring disposal, drying is an important step along the route from untreated wastewater solids to a product with nutrients and energy that can be put to good use, such as Class A biosolids.
PublisherWater Environment Federation
Copyright2021
Word count315
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Description: Heating Trends
Worldwide Examples
Heating Trends
In Germany, the cement sector has proactively supported the use of solids drying technology within the cement facility process. For example, three different facilities use three different drying technologies — all of them using waste heat for the drying process. Each facility uses the dried solids as auxiliary fuel for cement production. One facility has a single belt dryer handling 300...
PublisherWater Environment Federation
Copyright2021
Word count476
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Description: Heating Trends
Selecting the Right Technology
Heating Trends
The most common drying technologies for solids are paddle, belt, drum, and fluid bed. Each technology has its own advantages, yet collectively these solutions cover a broad range of application requirements. The source of thermal energy to be used for the process plays a key role when selecting the drying technology as this largely determines the cost-efficiency. The product also requires...
PublisherWater Environment Federation
Copyright2021
Word count330
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Description: Heating Trends
The Way Forward
Heating Trends
With the right choices, economic and environmental sustainability in water resource recovery can go hand in hand. Multiple proven solutions are available for biosolids reuse and resource recovery to enhance sustainability, while advances in the technology itself coupled with cutting-edge control and automation systems mean that the tools to address additional threats and challenges are already...
PublisherWater Environment Federation
Copyright2021
Word count102
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Heating Trends