1 / 20

outline

ofira
Download Presentation

outline

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. Reducing fresh water consumption in high water volume consuming industries by recycling AOP-treated effluents “AOP4Water”Zmanjševanje porabe sveže vode v industriji s ponovno uporabo (recikliranjem) očiščenih odpadnih voda13. oktober 2011, LjubljanaPregled in koncept projekta ter prvi rezultatiTrajanje: 01 januar 2011 – 31 december 2012 dr. Aleksandra Krivograd Klemenčič

  2. outline • Initial situation • AOPs for advanced effluent treatment • Project objectives • Execution, time frame

  3. Initial situation • O3 for advanced effluent treatment : many advantages, good results and experience • BUT: not always economical worthwhile • Make O3-treatment more attractive: • Combination with H2O2, UV, Ultrasound • Regions with a lack of freshwater • new water sources needed

  4. paper production ozone stage biofilter biological treatment receiving water AOP in effluent treatment • Ozone: • turns residual COD into biodegradable compounds • COD ↓, BOD5 ↑, BOD5/COD ↑

  5. Goal • (re-)use of AOP-treated effluents instead of freshwater • Source: effluents from • Pulp and paper mills • Food processing industry • Textile industry • Municipal waste water • (re-)use in • Pulp and paper mills • Textile industry • Key to (re-)use: • improve the efficiency of AOP-treatment • to ensure optimum water quality • to show the possible use of the treated water

  6. WP 1Coordination PTS Execution WP 2Factory investigations AQP WP 3AOP trials with effluents (paper mills, textile, municipal, food) WP 4 Biodegradability-trials PTS UL Celabor WP 6Impact of water(re-)use on process water and product quality WP 5 Mathematical Modelling (Data analyses and system identification) UL WP 7Water-treatment concepts AQP WP 8 sustainability studies Celabor WP 9 Dissemination and use PTS

  7. Time frame

  8. Selected textile industries • TSP Maribor d.d. • POLZELA socks and stockings factory d.d.

  9. Optionsofreuseof AOP-treatedwastewater in textileindustry • in dyeing process • in washing process • ?

  10. IzVRS and ECHO Ltd. designed and constructed lab-scale pilot plant for performing AOP-trials UV > 40 mJ/cm2 λ = 253nm Max. discharge: 15 L/min Redox, pH, O2 samplers Reservoir Hydrogen Peroxide pump, 2.7 mL/min Hydrogen Peroxide Ozonation Generator: 200-400 mg/h Internal air pump: 4-5 L/min Ventouri ozone injector System pump 2.4 L/min

  11. Task 3.2: AOP trials – technologies used individually • UV TRIALS • O3 TRIALS • H2O2 TRIALS • Sampling point (at POLZELA socks and stockings factory): • wastewater from the production of textiles – outflow from the equalization pond (where partial self-neutralization is present as acidic and alkaline wastewater is mixed) • Two parameters were chosen to be followed in the preliminary trials: COD and colouration.

  12. Results: UV TRIALS

  13. Results: UV TRIALS • λ = 253 nm • Q = 2.4 L/min • V = 2.4 L

  14. Results: O3 TRIALS

  15. Results: O3 TRIALS Q = 2.4 L/min V = 4.8 L QO3 = 500 mg/h

  16. Results: H2O2 TRIALS

  17. Results: H2O2 TRIALS Q = 2.7 L/min V = 4.8 L 2.7 mL of 30% H2O2 per minadded

  18. CONCLUSIONS • COD decrease: ozonation at the applied ozone concentration proved to be more efficient compared to UV irradiation (25% remaining COD at ozonation compared to 55% at UV irradiation) • COLOURATION: ozonation proved to be much more efficient compared to peroxide application in colour removal (19% remaining colouration at ozonation compared to 72% at peroxide application) • The amount of H2O2 added needs to be adjusted and surplus avoided

  19. FURTHER TRIALS Task 3.2: AOP trials – technologies used individually • POLZELA (Textile factory A): • Repetitions of experiments with separately applied methods (UV, O3 and H2O2)(Autumn 2011) • Performing experiments with Cavitation(Autumn 2011) • Parameters to be analyzed: COD, BOD5, Colour, Nitrate, Nitrite, TSS, pH, Total hardness, Sulphate, Chloride, Iron, Manganese, Copper, Alkalinity, Turbidity TSP (Textile factory B)?, municipal wastewater, removal of pharmaceuticals Trials planned to be performed in 2012

  20. FURTHER TRIALS Task 3.3: AOP trials – technologies used combined • POLZELA (Textile factory A): • UV +O3 (Autumn 2011) • H2O2 + O3 (Autumn 2011) • US + O3 (Autumn 2011) • US +UV (Autumn 2011) • US+ H2O2 + O3 (Autumn 2011) TSP (Textile factory B), municipal wastewater, removal of pharmaceuticals Trials planned to be performed in 2012

More Related