Presentation on theme: "Initially seen in 2007 Belgium, Ghent University – Fruit orchards BIOFILTERS."— Presentation transcript:
Initially seen in 2007 Belgium, Ghent University – Fruit orchards BIOFILTERS
Horticultural Development Council (HDC) Biobed Trial Headlines UK grower, 2 glasshouse sections – 6 months 14,000 litre pesticide waste and washings dealt with Insecticide, fungicides and 1 PGR 9 pesticides involved 8 of which were fully ‘retained’, 1 was 97.8% ‘retained’ – inlet reduction of 31 fold Under £500 build cost Now Biofilters are included by EA in T32 Waste Regulation Exemption
BIOFILTER under evaluation 2008 Flow- around 150 litres per ‘pump’ session
Liquid distribution over each container by pipe grid, 2 mm holes drilled in upper surface of pipes
Pea gravel Internal layer of pea gravel between geotextile membranes to prevent biomix material passing through. Sample bottle only used for research purposes, not required in commercial adoption
New spray centre building enclosing sprayer fill area. Next slide shows internal view.
System in use from 2012, No problems, well meets requirements Limited waters produced. Facility also includes potential for sprayer washdown Essex & Suffolk Water contributed to biofilter cost and are regularly sampling biofilter influent and effluent Fill area bunded below access level, building includes and biofilter & chemical store Biofilter within sprayer store / fill area Rinsed container storage
External 3 x IBC biofilter, shows bunding necessary
Spray out trough, covered when not in use. Fill area under cover. Output from both areas directed to 3 x container Biofilter with sump tank below.
Netherlands March 2013 IBC Biofilter with additional IBC’s with grasses and willows further reducing water content through evaporation
GRANTS! Catchment Sensitive Capital Grant Scheme now Countryside Stewardship Short application window each year Aim to reduce potential pollution Biobeds included Applied to CFSO Applications 2 nd March to 30 th April Works completed and claimed for 29 th Jan 2016 Rates – next slide
Code Capital item Guide price, represents 50% of the total cost of each capital item. CSF022 Pesticide handling and biobed options (Environment Agency consent may be required) A: Lined biobed (off-set or drive-over) with associated loading/wash down area (per unit) £118/m 2 B: Lined biobed (off-set or drive-over) only (where existing wash down area is already in place) (per unit) £77/m 2 C: Biofilters as alternative to larger off-set or drive over biobed for use with small volumes of pesticide washings (per unit). This includes four Integrated Bunded Containers (IBCs) £ D: Pesticide sprayer or applicator loading and wash down areas only (per unit) £40/m 2 E: Roofing for pesticide sprayer or applicator loading and wash down areas £62.00/m2
Regulation Summary 15,000l spray washings per biobed etc, not counting rainfall per biobed, same for biofilter but not suited to rainfall flow Biobeds / Biofilters may not be sited within 10 m watercourse 50 m where borehole used for non domestic / food purposes 250 m where borehole used for domestic / food purposes SPZ 1 New ruling EA – Environmental permit needed. Local EO check options with Local Groundwater and Contaminated Land Team. Follow Best practice within T32 guidance. To be reviewed in Feb 2015
Biobeds – when not required No problem, secured discharge Tank disposal by waste contractor OK Existing Permitted area Covered fill area then very low liquid production - Biofilter? Future alternatives?
Systems including evaporation Two systems currently –One based totally on evaporation –Evaporation over soil and straw mix similar to a biobed
Evaporation system. Contaminated liquid held in ‘plastic’ bag, evaporates over season. When fully evaporated at end of season, bag is rolled up, packed in bespoke container and transferred for approved disposal route.
Example of installed unit with elevated washing area Environment Agency do not require an exemption for this. Probably suits low annual volumes of liquids, required to be bunded and subject to positioning limits as with biobeds/biofilters as well as Best Practice in operation.
Treatment as Biobeds plus evaporation, soil / straw mix with translucent roof over and air gap. Removable roof to allow loading/ unloading of biomix.
Approved by EA in T32/U10 but no UK design data other than through supplier
French installation, simple gravity feed from fill area.
Next Steps? Think it through Review fill site, local drains, traffic Check WIMBY - EA Calculate volumes of liquids Priority Catchment? Talk to CFSO Roofing possible? Check system development – phases?
Summary Point source losses of pesticide can be significant Improved working practices can reduce these losses The window during which pesticides can be applied is limited. Accidents are inevitable Biobeds / Biofilters, evaporation systems can be used to effectively ‘treat’ pesticide contaminated run-off and equipment washdown and therefore reduce losses to water T32 exemption required from EA to have biobed/biofilter/+ evaporation, U10 for spreading mix to land 1 per 5 years. No Exemption required for Evaporation only system. Subject to the necessary exemption being granted, biobeds / biofilters offer a cost effective answer alongside ‘newer’ systems
More Information - Detailed information on designs and principleswww.biobeds.info then Water leading towww.voluntaryinitiative.org.uk My area WIYBY H2OK? Campaign Biobeds Catchment Work Environment Agency –www.environment-agency.gov.uk/ search biobedswww.environment-agency.gov.uk/ search biobeds Scottish Environment Protection Agency –PEPFAA Do’s and Don’t’s Guide