Συντάχθηκε 18-11-2014 16:20
από Petros Gikas
Email συντάκτη: pgikas<στο>tuc.gr
Ενημερώθηκε:
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Ιδιότητα: ΔΕΠ ΜΗΠΕΡ.
ΔΙΑΛΕΞΗ
Την Τετάρτη, 26 Νοεμβρίου στις 11:00 πμ, στο Αμφιθέατρο του Κτηρίου Επιστημών, θα δοθεί διάλεξη από τον Αναπληρωτή Καθηγητή Tonni Kurniawan, του Τμήματος Περιβάλλοντος και Οικολογίας του Πανεπιστημίου Xiamen, της Κίνας. Το θέμα της διάλεξης είναι: «Treatment of Stabilized Landfill Leachate Using Integrated AOP and Granular Activated Carbon Adsorption». Ο Assoc. Professor Tonni Kurniawan είναι προσκεκλημένος του Εργαστηρίου Σχεδιασμού Περιβαλλοντικών Διεργασιών του ΜΗΠΕΡ. Για πληροφορίες μπορείτε να απευθύνεστε στον Επ. Καθ. Πέτρο Γκίκα. Η διάλεξη είναι ανοικτή στο ευρύτερο ακαδημαϊκό κοινό.
Abstract
Like other major cities in China, Xiamen has experienced problems of solid waste generation due to a rapid growth in the urban population and economic development in recent years. Over 6.45 million tonnes of solid waste were generated and disposed of at a local landfill.
The common features of raw leachate in local landfills are a high concentration of NH3-N (2,500-5,000 mg/L), a moderately high strength of organic compounds (5,000-20,000 mg/L), and a low biodegradability ratio (BOD5/COD) of less than 0.1.
The laboratory studies reported investigated the treatment performance of combined techniques of advanced oxidation processes (AOP) including ozone or H2O2, and granular activated carbon (GAC) adsorption for removal of recalcitrant compounds from stabilized leachate.
Of the treatments investigated, at the same initial concentrations (COD: 8,000 mg/L; NH3-N: 2,620 mg/L), an integrated process of ozonation and ozone-treated GAC adsorption had a substantially higher removal performance for recalcitrant compounds and NH3-N (COD: 86%; NH3-N: 92%) than did H2O2-catalyzed GAC adsorption (COD: 80%; NH3-N: 57%). Although most integrated treatments have shown promising results for leachate samples from the local landfill, they were still unable to generate treated effluents that complied with the COD limit of lower than 200 mg/L and the NH3-N discharge standard of less than 5 mg/L. This suggests that further treatments need to be undertaken to complement the degradation of refractory compounds in the leachate.
