NOWRA Instructors and Class Information

Transcription

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2 NOWRA Instructors and Class Information Instructors Sara Heger, University of Minnesota Tom Fritts, Residential Sewage Treatment Allison Blodig, GYST Consulting Moderator Eric Casey, NOWRA Exec. Dir. Presentation binder

3 Please turn off or silence your cell phone Thanks!

4 Who is NOWRA? Association formed in 1992 to promote the onsite wastewater treatment industry through training, education and promotion on a national level We bring together professionals from around the country to address: regulatory issues, provide training and education, and conduct business among our membership

5 Map of NOWRA Affiliate States AzOWRA (Arizona) COWRA (Carolinas) CPOW (Colorado) DOWRA (Delaware) FOWA (Florida) IOWWA (Iowa) KSFA (Kansas) MAOWP (Massachusetts) MOWPA (Maryland) MOWRA (Michigan) MnOWA (Minnesota) MSO (Missouri) NmOWA (New Mexico) OWAI (Idaho) POWRA-NM (New Mexico) POWRA (Pennsylvania) TOWA (Tenn) UOWA (Utah) VOWRA (Virginia) WOSSA (Washington) WOWRA & WPCA (Wisconsin)

6 Key NOWRA Activities 1. Advocate with USEPA A. NOWRA was specifically asked by the Decentralized Wastewater Office to comment on and help implement the Chesapeake Bay Watershed Data Sharing Initiative B. EPA is exploring Data Sharing on a national basis. They held a meeting in DC in November and NOWRA was specifically asked to comment C. Decentralized Wastewater Partnership NOWRA is a charter member

7 Key NOWRA Activities 2. Lobbying at a Federal Level A. Hired Arnall, Golden & Gregory in March, Oversight by the NOWRA Board of Directors B. First event organized by Tom Cassidy was Technology Expo on Capital Hill, July 30, Held again in C. Plan for 2016 includes lobbying for SRF funds, more resources at EPA be allocated to decentralized, and designating onsite/decentralized as Green Infrastructure D. These cannot be done on a local or state level E. Forming a Decentralized Caucus in Congress

8 Key NOWRA Activities 3. National Conferences and Education A. Largest annual national onsite/decentralized conference B. NOWRA is the only authorized training entity for the NEHA Certified Installer of Onsite Wastewater Treatment Systems (CIOWTS) to prepare installers for the exam C. NOWRA to launch Online Training in 2016 D. Septic Locator on NOWRA website free to members E. Partnership with State Onsite Regulator Alliance

9 2016 Mega-Conference in Joint conference between NOWRA NAWT (National Association of Wastewater Transporters) FOWA (Florida Onsite Wastewater Association) and Western State Organizations October 26-29, 2016 The Nugget Hotel and Resort, Reno, NV ($69 room rate) Call for Papers available at - nowra.org Reno, Nevada

10 Key NOWRA Activities 4. Specific Benefits for Installers/Contractors: A. CEU s and contact hours available from NOWRA conferences and training by nationally known instructors B. Lobbying to increase SRF funding which would directly benefit installers via increased work C. Admiral s Bank financing program exclusive to NOWRA D. Educational Resources: CIOWTS exam, etc. E. Septic Locator on website F. Liability Insurance program in MN and MO G. Resource Library

11 NOWRA Making a Difference.. With People - Includes You! For More Information Website: info@nowra.org Phone: (800)

12 MAOWP (formerly YOWA) For More Information Website: Phone:

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14 Goal: limit human contact Keep wastewater below ground Disposal options Public health Disposing of pathogens Treatment? Management: install, flush and forget Disposal

15 Why Do We Treat Sewage? Protect Public Health Environment Key issues evaluated while assuring protection Good treatment Economical Sustainable

16 Public Health Making people sick Good systems are the KEY to protection

17 Septic Tank & Soil Treatment Area Evolving goal: Disposal: effluent goes away versus Dispersal: TREATMENT Public health AND environmental issues addressed Management: Disposal: often none at all; Dispersal: System management is critical Well Groundwater Aerobic soil

18 Goal: Treatment AND Dispersal Starting to address environmental concerns in addition to public health concerns Technological advancements now allow removal of: Pathogens Solids Nutrients System management is vital to treatment Goal is now DISPERSAL Hydrologic cycle

19 Hydrologic Cycle Septic System Wastewater Input Water Table Runoff Stream Ground Water Impermeable Layer

20 Reuse Goal: careful use of a valuable resource Wastewater vs. water Potable vs. Nonpotable uses Landscape reuse Toilet flushing Some areas are looking at it as potable Management: O&M is even more critical

21 What is Wastewater?

22 All wastewater must be treated

23 The Problem Biology - Pathogens Bacteria Cholera Typhoid Salmonella Shigella Water-borne diseases Fecal coliform Indicator Virus Hepatitis A Acute gastroenteritis Polio Parasites Protozoa Amoebiasis Giardia Cryptosporidiosis Roundworm

24 Level of Risk It depends- On how well the system was designed, installed, and maintained If there is wastewater draining to or surfacing in the yard Installed in an area with high groundwater levels Close to a drinking water well Cleaning effluent screens If systems is designed, installed, and maintained properly risk to an ordinary individual is minimal

25 Three Approaches to Wastewater Treatment 1) Centralized 2) Decentralized Collection network for many homes Central treatment facility Discharge surface requires state permit Individual or small group of homes Onsite treatment facilities (near site) Soil based dispersal or subsurface discharge 3) Combination

26 Decentralized Approach

27 The Model

28 Decentralized Treatment is Important Nationally 25% of population served 33% of new construction Small communities: 11% of need > 50% in suburbs or cities

29 Where Septic Systems Are Used

30 What Is an Onsite Wastewater Treatment System? 1. Wastewater Source 2. Collection and Storage 3. Pretreatment components 4. Final Treatment and Dispersal components

31 Wastewater Source User Domestic Commercial Industrial Do you mind?

32 Collection Piping from facility with cleanout Blackwater Graywater

33 Collection Holding tanks Composting toilets Incinerating toilets

34 Pretreatment Septic tanks Aerobic treatment units Media filters Constructed wetlands Membrane bioreactors Disinfection

35 Septic System Incorporating Pretreatment

36 Septic Tank

37 What is a Soil Treatment Area? A soil treatment system: Safely treats and disperses and recycles wastewater All the treatment and dispersal takes place on site or close by Natural physical, chemical, and biological processes occur primarily in the soil

38 Septic Tank: Primary Treatment Job of tank: catch the solids Water tight tank, inlet, inlet baffle, inspection pipes, manhole, outlet baffle, outlet pipe Layers in tank Scum layer: floating soap, grease, toilet paper, etc Liquid layer: water, liquid, and suspended solids Sludge: heavy organic and inorganic materials in the bottom of the tank Anaerobic bacteria breakdown organic solids

39 Components of a Septic System Source Primary Treatment Soil Treatment

40 Septic System Components Source Well Tank Soil Treatment Area Treatment in Soil Limiting Condition, Saturated Soil

41 Process When Wastewater Enters Soil Biomat forms Results in unsaturated conditions Aerobic organisms treat the wastewater

42 Aerobic zone Well Groundwater Aerobic soil

43 Unsaturated Soils Pores are filled with Air & water along the soil particles

44 Saturated Soils Pores are filled with water

45 BIOMAT

46 1. Effluent flows into pipe 3. Effluent begins to pond and flows across soil interface. 2. Effluent flows out of pipe and into gravel 5. Effluent flows into soil 4. Biomat begins to form

47 NOT TO SCALE

48 NOT TO SCALE

49 Regulatory/Code Goals Performance Management Treatment Deals with all the problems Acceptance Goes where it is suppose to Stays underground

50 System Type and Size System type based upon soils and site Depth to limiting condition Bedrock or saturated soils Area available System size based upon: Use Number of bedrooms Garbage disposal Soils Percolation test results, Soil type (sand, loam, clay)

51 Color & Saturation Well Drained Moderately Well Drained Poorly Drained

52 Management Out of site, out of mind doesn t work! Regular inspection & maintenance can prevent system failure Proper care & maintenance will prolong system life & save money Selling is easier

53 QUESTIONS SEPTIC.UMN.EDU QUESTIONS?