Crynant WwTW

Constructed Wetlands: Groundwater Treatment Plants (GWT)

Created at: 25 Aug 2016

Description

Need<br>Crynant sewage treatment works operated by DwrCymru Welsh Water needed to be upgraded to achieve a tighter consent forsuspended solids (28 mg/l to 15 mg/l) and BOD (16 mg/l to 10 mg/l) in additionan ammonia consent of 5mg/l was being introduced. The treatment process atCrynant comprised primary settlement, biological filtration and humussettlement. The poor condition of the old process units and the imposition of anew discharge consent, including a first time ammonia standard, necessitated acomplete redesign of the treatment process. The sewage works treat a populationequivalent of 5,680 receiving average daily flow of 3,400 m3/d. Dwr Cymru Welsh Water required a costeffective and efficient solution to their wastewater treatment needs whichwould also meets the carbon accounting requirements of OFWAT.<br><br>Solution<br>The process selection and design was constrainedby several complicating factors including high infiltration and difficultground conditions. To minimise the footprint required as well as having aslightly lower capital (CAPEX) and operational expenditure (OPEX), ARM designedand constructed 2 vertical flow reed beds totalling 2,400m2. Onlyone bed operates at a time; each typically operated for a two week periodduring which the standby bed is allowed to rest, encouraging the biodegradationof any accumulated solids.

Help us provide more detailed information about this project by contributing!


Related projects

Below you will find the latest related projects in this category.

Show more related projects →

View all Water projects →