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Low Volume Privately Owned Domestic Sewage Treatment Plants Report Back From Norwegian Visit 2007 Chris Fennemore eThekwini Pollution & Environment Branch.

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Presentation on theme: "Low Volume Privately Owned Domestic Sewage Treatment Plants Report Back From Norwegian Visit 2007 Chris Fennemore eThekwini Pollution & Environment Branch."— Presentation transcript:

1 Low Volume Privately Owned Domestic Sewage Treatment Plants Report Back From Norwegian Visit 2007 Chris Fennemore eThekwini Pollution & Environment Branch

2 Participants Paid by Norwegian Funding via DEAT Frank Stevens – EWS Deputy Head Technical Support Bill Pfaff – EWS Strategic Planning eThekwini Lin Gravelet-Blondin – DWAF Renelle Pillay – DWAF Paul Gaydon – Wastewater Consultant/ WRC Di Dold – WESSA Me Ingunn Lindemann – SFT Haralde Gaarde – SFT To Visit Later Larry Laas Dale Braum Claudia Botha

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4 Freshwater resources in Norway Geography Vast areas, km2 Vast areas, km2 Many watercourses, lakes - 5 % of area Many watercourses, lakes - 5 % of area High level of precipitation/runoff, High level of precipitation/runoff, mm/year mm/yearDemography Few people: 4.5 mill. Few people: 4.5 mill.History Water ”issues” arose in phases: health, Water ”issues” arose in phases: health, hydropower, pollution, nature conservation

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7 SFT Head Office

8 Norwegian Environmental Authorities Ministry of the Environment Directorate for Cultural Heritage (RA) Directorate for Nature Management (DN) Norwegian Mapping Authority (SK) Norwegian Pollution Control Authority (SFT) Polar Research Institute (NP) Product Register (PR) *

9 SFT: Tasks And Areas Of Responsibility Provide expert competence and information Environmental monitoring Enforce acts and regulations Review and evaluate industries Instruct and guide the County Governors International environmental and developmental cooperation

10 SFT International Projects

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12 Legal Basis for SFT’s Authority The Pollution Control Act/ Water Resources Act 2001 The Pollution Control Act/ Water Resources Act 2001 The Product Control Act The Product Control Act Regulations connected to the acts Regulations connected to the acts EU directives and regulations EU directives and regulations International Conventions and Agreements International Conventions and Agreements

13 Waste Water Management Ministry of Environment Norwegian Pollution Control Authority County Governors EU Water Framework Directive National legislation Discharge consents and local planning/regulation Municipalities Guidance Complaint decisions Inspections and compliance checks

14 Municipalities (430) Political + Administrative National Regional Local MoE SFT County Governors (18) Administrative

15 Local Governments in Norway The regional level: 18 Counties The local level: 431 Municipalities from 250 to inhabitants from 250 to inhabitants Responsible for important public services

16 Treatment Requirements Large Cities Less sensitive areas Normal areas Sensitive areas Primary Treatment 50 % suspended solids removal 20 % biological oxygen demand removal Secondary Treatment 70 % biochemical oxygen demand removal 75 % chemical oxygen demand removal Tertiary Treatment 70 % biochemical oxygen demand removal 75 % chemical oxygen demand removal 90 % phosphorus removal (70 % nitrogen removal)

17 Wastewater Treatment: Inhabitants Connected (2005) Estimated out of 4,5 million people connected to small WWTP

18 Wastewater Treatment Plants < 50 PE, By County (2005) 2005 Estimate = Small WWTPs

19 Small Wastewater Treatment Plants < 50 PE (2005)

20 Professional Association Membership restricted to proven technologies Plants tested by an independent testing authority. Paid by manufacturer. Testing protocol available in Norsk only. Costly to translate but Dale Braum will be evaluating the applicability of this.

21 Application Procedure Small Towns/ Residents Are standard requirements met? Treatment levels Treatment documentation Discharge point Consent to discharge No consent to discharge 6 Weeks YES Are local water quality objectives met? YES NO

22 EutrophicationEutrophication COD 125mgO2/L in most areas Focus more on N & P limits

23 Camelot 2003

24 Camelot 2006

25 Treatment requirements Small cities/residents Area Classification Recipient (%) removal (%) removal Phosphorous (P) Biological Oxygen Demand (BOF5) Suspended Solids (SS) Sensitive and normal areas User interests 9090 Risk of eutrophication 9090 No risk of eutrophication /user interests 60- Less sensitive areas --20

26 Treatment Efficiency Factors In Per Cent (%) Type of treatment PN Direct discharges 00 Sludge separator 55 Sludge separator with infiltration 7520 Sludge separator with sand filter 1515 Mini wwtp, biological 1510 Mini wwtp, chemical or chemical-biological combined 9015 Sealed tank Sealed tank for blackwater 7590 Constructed wetland 9050 Biological toilet, filter for grey water 9080 Other treatment 5020

27 Discharge Phosphorous, WWTP < 50 PE (2005) In 2005: TOT-P: 331 tonnes In 2005: TOT-P: 331 tonnes TOT-N: tonnes

28 Discharge of Phosphorous & Nitrogen (WWTP < 50 PE) Discharge statistics of small wwtp mainly based on factors: Discharge (tonnes/year) = inhabitants connected * discharge factor * treatment efficiency factor Discharge (tonnes/year) = inhabitants connected * discharge factor * treatment efficiency factor Discharge factors (contribution per person): TOT-P : 1,6 g / (p*d) TOT-P : 1,6 g / (p*d) TOT-N : 12,0 g / (p*d) TOT-N : 12,0 g / (p*d)

29 STATISTICS NORWAY Kongsvinger: Visiting address: Oterveien 23 Oterveien 23 Oterveien 23 Oterveien 23 Postal address : N-2225 Kongsvinger Phone : Fax : First Population Census

30 Norwegian The Statistics Act of 1989 Main duties: Map the need for official statistics Map the need for official statistics Collection of data, processing and dissemination of official statistics Collection of data, processing and dissemination of official statistics Analysis and research Analysis and research Coordinate official statistics produced by public bodies Coordinate official statistics produced by public bodies Responsibility for international statistical cooperation Responsibility for international statistical cooperation

31 The Statistics Act - continued Rights and responsibilities Statistics Norway is a professional independent institution and decides autonomously what to publish and when and how this will be done Right to impose upon any person, business or government institution an obligation to provide information necessary for the production of official statistics Access to administrative registers Choose the statistical methods which form the basis for the preparation of official statistics Data on individuals are to be treated confidentially The use of coercive fines

32 Quality Assurance CEN standardisation Package plants Package plants Septic tanks Septic tanks (Natural infiltration system) (Natural infiltration system) National best practice guidelines Norwegian official standards Norwegian official standards Standards approved by renowned professionals Standards approved by renowned professionals

33 Maintenance All polluters/plant owners have to sign a contract on future maintenance Frequency of service Frequency of service Sludge collection Sludge collection Reporting to the municipality Reporting to the municipality Supply of new parts for the plant Supply of new parts for the plant

34 Inspections & Compliance Checks Non-compliance common Non-compliance common Non-compliance can be acted on by: Non-compliance can be acted on by: Dialogue Dialogue Financial support Financial support Withdrawal of consent to discharge Withdrawal of consent to discharge Deadline for corrective measures. No Deadline for corrective measures. No measures will produce a penalty measures will produce a penalty

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36 Reporting The Ministry of Environment/SFT rely on information produced by reporting activities when new policies are drawn up WWTP > 50 pe: WWTP > 50 pe: All plant owners report directly to Statistics Norway All plant owners report directly to Statistics Norway WWTP < 50 pe: WWTP < 50 pe: Municipality reports aggregated data to Statistics Municipality reports aggregated data to Statistics Norway Norway  The Ministry of Environment reports to the European Surveillance Authority (SADC, AU??) Surveillance Authority (SADC, AU??)

37 Dataflow, WWTP < 50 pe

38 KOSTRA Reporting in 2006

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46 Lessons Learnt Our regulatory systems are very good in RSA for package plants We should look at reclassifying our definition of package plants There is an opportunity to have a national database for environmental data. This could streamline PROATIA The possibility of establishing a package plant manufacturer’s association should be explored (WISA has expressed an interest in hosting this organisation) We should investigate the use of field test measurements more. Samples should be taken only when a plant exceeds the limits. There would be a considerable cost saving here. We should seek an national testing house for treatment technologies. The Norwegian document should be interrogated for its applicability to South African conditions

47 Thank You Acknowledgements: I Lindemann - SFT H Gaarde - SFT BioforskGiva Mr. Jørn Kristian & Gisle Berge Statistics Norway F Stevens – EWS W Pfaff – EWS R Pillay – DWAF Paul Gaydon - Umgeni


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