1 / 19

GREYWATER SYSTEMS

GREYWATER SYSTEMS. N MEHLIKA KAYAALP PRINCIPAL ADVISER WASTEWATER Department of Human Services. DEFINITIONS. Wastewater domestic wastewater =sewage =all wastewater industrial wastewater = process wastewater Greywater domestic wastewater except toilet wastewater, or

salena
Télécharger la présentation

GREYWATER SYSTEMS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. GREYWATER SYSTEMS N MEHLIKA KAYAALP PRINCIPAL ADVISER WASTEWATER Department of Human Services M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  2. DEFINITIONS • Wastewater • domestic wastewater =sewage =all wastewater • industrial wastewater = process wastewater • Greywater • domestic wastewater except toilet wastewater, or • domestic wastewater except toilet & kitchen wastewater • Reclaimed Water • derived from sewage • treated to a standard satisfactory for intended reuse • Biosolids • sludge • not “solid waste” M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  3. GREYWATER CHARECTERISTICS • Greywater characteristics (Collated from WA Greywater Code + literature) • E Coli: < 30 (some laundry rinse) to 108 / 100mL= all ww • BOD5 : medium to high (90 - 290 mg/L) • SS: low to high (45 to 330 mg/L) • P : low to high (< 1 to 27 mg/L) • TKN : low to medium ( 2 - 30 mg/L) • Na: low to high (25 - 230 mg/L) • conductivity : low to high: (300 - 1100 S/cm) M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  4. GREYWATER REUSE SYSTEMS • Reuse is supported and encouraged • conserves resources • lessens environmental pollution - if done properly • Reduction in waste/ wastewater production must also be aimed for M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  5. GREYWATER REUSE SYSTEMS -2 • System DESIGN and OPERATION must consider • public health risks (prevent / minimise) • water & nutrient balance and chemicals • prevention of pollution of soil, groundwater, surface water , marine environment • reuse purpose - to be suitable to the degree of treatment and method employed for reuse M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  6. DHS WASTEWATER WEBPAGE • Information on • greywater systems • other alternative onsite systems • standard onsite systems • town or communal wastewater systems • reclaimed water can be found on: www.dhs.sa.gov.au/pehs M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  7. M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  8. Wastewater management • Wastewater Management in SA • Standard onsite wastewater systems~ Maintaining aerobic systems~ Maintaining septic tank systems • Alternative onsite systems • Towns & other large developments • Product approval • Reclaimed water (treated effluent) reuse M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  9. Composting toilets or other blackwater (toilet wastewater) systems • Greywater systems (laundry, bath, shower, kitchen etc) • Reedbed systems • Nutrient removal systems • Other wastewater systems using any technology M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  10. If you plan to install an alternative onsite wastewater system in: • a SA Water sewerage area OR • an area serviced by a council scheme where the alternative wastewater system will not be connected to the scheme OR • a private scheme • the proposal should be discussed with the service supplier, as a full or partial exemption from any requirement for connection before the application for installation is submitted M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  11. Guides and Standards • The following guides are provided to assist in the preparation of an application for an alternative onsite system: • Composting toilets or other blackwater (toilet wastewater) systems • Greywater /sullage systems • Reed bed systems • Application Form • Application form for the installation of alternative onsite wastewater systems M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  12. GREYWATER REUSE SYSTEMS - 1 • separate greywater and blackwater - blackwater to : • sewer, STED, composting toilet, ST…. • greywater to : • diversion device or treatment system • provide appropriate treatment • reuse (mainly by irrigation) • subsurface - if not treated and/or not disinfected • above surface - if treated and disinfected M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  13. GREYWATER REUSE SYSTEMS - 2 • Currently, mostly at “onsite systems” areas • 50 REEDBED installations • 50 COMPOSTING TOILET installations • With current water restrictions inquiries increased multi fold • More inquiries in sewered areas • A circular sent to councils • 21 councils indicated concurrence so far incl. Adelaide metropolitan & other sewered areas M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  14. GREYWATER - INTERSTATE • Interstate approach is similar to ours • WA • Code of Practice for the Reuse of Greywater, 2003 • Victoria • Reuse Options for Household Wastewater, 2001 • NSW • Domestic Greywater Systems Accreditation Guidelines, 2000 • Greywater Reuse in Sewered Single Domestic Premises, 2000 • Queensland • Onsite Sewerage Code, 2002 M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  15. GREYWATER DIVERSION DEVICE • A new greywater system is coming to SA • It diverts only bath and laundry water • Incorporates trench irrigation system • Approved- an interim approval-24 months • After 24 months to be re-evaluated • May be installed in : • sewered / reticulated wastewater areas, and • onsite systems areas M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  16. GREYWATER DIVERSION DEVICE - 2 • has a filter, and • an overflow feature to direct wastewater (in case of blockages and/or irrigation area failure) to the main wastewater system for the dwelling, ie to: • sewer, or • STEDS drain, or • other communal system, or • onsitewcs M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  17. GREYWATER DIVERSION DEVICE - 3 • Approval is issued with a warning to be on the packaging: Notice to SA users • Notice to SA users - warning states that • if the building is within a reticulated wastewater system area first check with SA Water or council or the owner / operator of the reticulated wastewater scheme - whichever is appropriate M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  18. GREYWATER DIVERSION DEVICE - 4 • Notice to SA users (continued -2) • approval by local council or DHS • installation by a licensed plumber • it is only for laundry and/or bath water, NOT for kitchen wastewater • Gravity connection to the device and its above ground installation is required • with soils < 10 L/m2d permeability, reuse of greywater for irrigation is not permitted M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

  19. GREYWATER DIVERSION DEVICE -5 • Notice to SA users (continued -3) • Irrigation area must comply with all set backs stated in SA Septic Tank Codes and its supplements A & B • 2.5 meters from any building or boundary ,etc • 50 meters away from any bore, dam or watercourse; • above the 1956 River Murray flood level, and greater than 100 meters from its pool level; • at least 500 mm from the bottom of the irrigation trench to the groundwater or bedrock; and • in coastal areas, check with local council regarding the minimum set back from the coast M Kayaalp - Onsite Sytems Seminar - October 2003 : Greywater Systems

More Related