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Reclamation of treated urban waterDissolved organic nitrogenDiana Norton BrandãoPromotor: Jules van LierCo-supervision: Si...
ContentsI.    What is DON?II.   RelevanceIII. Research objectivesIV. Methodology and resultsV.    Further research What is...
I. What is DON?- 65% of the dissolved nitrogen in effluents from conventional WWTP- Free aminoacids- Combined aminoacids- ...
II. Relevance- European surface water criteria: Total N concentrations < 2,2 mg/L- DON and inorganic N may have different ...
III. Research objectives- Understand DON occurrence and composition in wastewater- Determine DON bioavailabilityWhat is DO...
IV. Methodology and results1) DON along tertiary filtration                                                               ...
IV. Methodology and results1) DON along tertiary filtration  6 sampling points, fractionation in Phi and Pho  Samples     ...
IV. Methodology and results2) Bioavailability tests: test mediums - Effluent + Algae + full nutrients - Effluent + Algae +...
IV. Methodology and results2) Bioavailability tests: preparation 1. Effluent filtration 2. Fraccionation philic/phobic 3. ...
IV. Methodology and results     2) Bioavailability tests: Chl-a development                                             Ch...
V. Further research- Quantification of DON bioavailability- Relation between DON concentration profile and backwash phase-...
websitewww.delftbluewater.nl
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07b Reclamation of treated urban water

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Presentation Diana Norton Brandão
on Dissolved organic nitrogen

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07b Reclamation of treated urban water

  1. 1. Reclamation of treated urban waterDissolved organic nitrogenDiana Norton BrandãoPromotor: Jules van LierCo-supervision: Sigrid Scherrenberg29th May 2012
  2. 2. ContentsI. What is DON?II. RelevanceIII. Research objectivesIV. Methodology and resultsV. Further research What is DON Relevance Objectives Meth. & Results Further research
  3. 3. I. What is DON?- 65% of the dissolved nitrogen in effluents from conventional WWTP- Free aminoacids- Combined aminoacids- Proteins- Low-molecular-weight aliphatic amines such as methylamine, dimethylamine,piperidine and pyrroline- Nitrogen containing synthetic chelating agentsWhat is DON Relevance Objectives Meth. & Results Further research
  4. 4. II. Relevance- European surface water criteria: Total N concentrations < 2,2 mg/L- DON and inorganic N may have different potential for eutrophication(bioavailability of DON is uncertain)- DON may form variety of nitrogenous disinfection by-products with muchstronger carcinogenicity than that of regulated DBPs- Little knowledge about DON What is DON Relevance Objectives Meth. & Results Further research
  5. 5. III. Research objectives- Understand DON occurrence and composition in wastewater- Determine DON bioavailabilityWhat is DON Relevance Objectives Meth. & Results Further research
  6. 6. IV. Methodology and results1) DON along tertiary filtration Persulfate digestion Collection, filtration Ion cromatography HL DON Phobic DON Philic XAD treatment What is DON Relevance Objectives Meth. & Results Further research
  7. 7. IV. Methodology and results1) DON along tertiary filtration 6 sampling points, fractionation in Phi and Pho Samples DON P1 - HF 3,68 P1 - HB 0,75 4,42 P2 - HF 2,78 P2 - HB 0,31 3,09 P3 - HF 3,20 P3 - HB 0,29 3,50 SBBR filtration removes P4 - HF 1,93 DON P4 - HB 0,46 2,39 P5 - HF 1,32 P5 - HB 0,09 1,41 P6 - HF 0,96 P6 - HB 0,20 1,16 What is DON Relevance Objectives Meth. & Results Further research
  8. 8. IV. Methodology and results2) Bioavailability tests: test mediums - Effluent + Algae + full nutrients - Effluent + Algae + full nutrients except NO3 - Effluent + Algae + no nutrients Effluent: untreated, philic fraction, phobic fraction What is DON Relevance Objectives Meth. & Results Further research
  9. 9. IV. Methodology and results2) Bioavailability tests: preparation 1. Effluent filtration 2. Fraccionation philic/phobic 3. Bacterial inoculum 4. Algae inoculum 5. Nutrient addition 6. Incubation at half dark light cycle 7. Monitoring of Chl-a, TN, NO3, NO2, NH4 and DON What is DON Relevance Objectives Meth. & Results Further research
  10. 10. IV. Methodology and results 2) Bioavailability tests: Chl-a development Chl-a development 600 Eff full nut 500 Eff full nut except NO3 Phi full nutChla conc (µg/L) 400 Phi no nut 300 200 HNP effluent with 100 addition of nutrients 0 except NO3 allowed 0 1 2 3 4 5 6 7 8 9 10 algal growing -100 Time (days) What is DON Relevance Objectives Meth. & Results Further research
  11. 11. V. Further research- Quantification of DON bioavailability- Relation between DON concentration profile and backwash phase- How to remove DONWhat is DON Relevance Objectives Meth. & Results Further research
  12. 12. websitewww.delftbluewater.nl

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