THE MAGAZINE FOR THE DRAINAGE,WATER &WASTEWATER INDUSTRIES
TECHNICAL FEATURE
[Graph4]Hoopstress (Designlife) &Reliable lifetime
manufacturers shows that for earlier generationmaterials the transition towear- outmodewill likely start at around 235 years.2 For other applications like natural gas or hydrogen, oxidation onset should take considerably longer. All thismeans real lifetimes for plastic pipes can be achieved that aremeasured in hundreds of years, not tens of years. And the great news is that the industry continues to invest in innovation to extend these lifetimes further into the future by improving resistance to stress crack and oxidation effects in new materials. Thatmeans if you specifywisely,
usewelded connections of compatible materials, you should be able to construct pipe assetswith genuine lifetimesmeasured in hundreds of years; surely a great benefit when specifying plastic pipes for critical long- termassets.
Updatedwastewater treatment guidance gains regulatory support B
ritishWater has published newtechnical guidance for users of packaged
treatment plantswhich includes updated information on environmental regulatory standards and legislation. TheUK’s four environmental regulators, the EnvironmentAgency,Natural Resources Wales,Northern Ireland EnvironmentAgency and the Scottish Environment Protection Agency, all support publication of the guide, whichwaswritten by BritishWater’s Packaged Treatment Plant FocusGroup. It includes advice on regulatory responsibility, maintenance and servicing, howto protect plants fromdamage andwhat they are designed and not designed to
treat.The guidance has been issued alongside advice on howto safely restart packaged treatment plants thatmay have been out of action since Covid-19 lockdown restrictionswere put in place inMarch. Mar Batista, technicalmanager at BritishWater, said:“Packaged treatment plants are vital pieces of kit for sites that aren’t onmains drainage.While they are designed to be simple tomanage andmaintain, owners have an ongoing duty to ensure the treated effluentmeets environmental standards and does not pollute surrounding surface and groundwater. “The regulatory landscape has changed since the last guidancewas last updated 10 years ago - it is important for users to be aware of these changes, aswell as our newbest practice guidelines, so they can continue to run their treatment plants effectively and safely.” The guide has beenwelcomed by
FOLLOW US
environmental regulators. HelenWakeham, deputy director ofwater quality, groundwater &land contamination at the EnvironmentAgency, said:“We welcome BritishWater’s refreshed and updated user guide,whichwill provide valuable guidance for packaged treatment plant operators on ensuring they can continue towork safelywhile protecting the environment.” ChristopherHall, seniorwater quality technical advisor atNatural ResourcesWales, said:“The correct use andmaintenance of a private sewage treatmentworks is very important to avoid it becoming a health hazard and polluting the
environment.Advice in the updated BritishWater guidance will help the user tomeet the regulatory requirements inWales.” AndyHemingway,water specialist at the Scottish Environment ProtectionAgency, said:“This is a welcome update of a useful guide. Itwill help users look after their packaged sewage treatment plants and avoid causing pollution.” This is the first in a planned series of updates to BritishWater codes of practice. Its accompanying recommissioning guide is aimed at businesses such as restaurants, cafes, tourismand leisure facilities thatmay be preparing to reopen after a period of closure and lists critical health and safety guidance andmechanical checks to bemade before
restarting equipment. Batista said:“Onsite treatment plants are designed to dealwith aminimumflowrate of effluent – if this rate has not been reached since lockdownwas announced inMarch, the biological processeswithin the plantwould havewound
down.Thesewill take time to embed again. Some proactive action ahead of timewill enable a smooth start, reducing the risk of technical problemswhen the doors of businesses reopen.”
July 2020 | drain TRADER 35
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