Source: https://tendernation.io/opportunities/01a13c13-b733-72f6-8917-918b9f186af3/phd-study-phosphorus-fate-and-management-on-the-west-sedgemoor-sssi-water-syste awarded GB negotiated without publication procedure Suitable for SMEs # PhD study: Phosphorus fate and management on the West Sedgemoor SSSI water system [Defra Network eTendering Portal](https://tendernation.io/buyers/defra-network-etendering-portal) Often single bidder Estimated value £18,655 Published 30 Oct 2017 Deadline Closed 1 Aug 2017 ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Buyer says suitable for VCSEs The buyer ticked “suitable for voluntary, community and social enterprises” on the notice. - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender Study to look at how ditch management can be changed to accelerate recovery from nutrient enrichment which will include dealing with the existing burden of phosphorus (P) in the system, covering: • The effects of winter flooding • The optimum frequency of de-silting and weed cutting in the ditches and ways of extporting nutrients from the system (ie. how to deal with dredgings) • The partitioning of (P) between sediment, (P) and algae/Lemna and factors affecting this such as flow, water levels, seasonality and physico-chemical factors such as dissolved oxygen • The luxury uptake of (P) by Lemna and the possibility of 'harvesting' Lemna and other macroalgae to reduce internal cycling and to export nutrients. - Rapid ways of monitoring Lemna and algae cover (eg. drones) - The interactions between water level management and the operation of structures and nutrient dynamics. Additional information: Please note that Defra procurement uses e-tendering, provided by Bravosolutions. In order to access the Bravo system you will need to be registered. Could I therefore request that you register on the Bravo portal for Defra. If you're already registered on the Bravo portal please check that your registration includes Defra, as you have to specify us in order to correctly receive the tender documents. If you have any problems with the registration process, please contact the Bravo helpline on 0800 368 4850 or alternatively email them at . The link you require for new registration/amendments to registrations is - [defra.bravosolution.co.uk](https://defra.bravosolution.co.uk) Read full description ## CPV classification Technical services Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/977c62ae-bcb3-4973-bc60-1a3cb74aaa0a) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. 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