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Dissolved and colloidal organic nitrogen removal from WWTP effluents and reject waters using physical-chemical processes
Abstract
Four physical-chemical processes were compared in terms of the efficiencies of dissolved and colloidal organic nitrogen (DON and CON) removal from the secondary effluents (SE) and reject water from full-scale biological nutrient removal activated sludge systems. Adsorption on activated carbon was most efficient and allowed to remove from the SE up to 80% and 100% of DON and CON, respectively. High efficiencies of DON removal from SE (up to 55%) were also obtained when using coagulation with Fe(III) chloride and calcium hydroxide at the final pH=11.0-11.5. The efficiency of DON removal from thickening waste activated sludge (TWAS) reject water, obtained using coagulation with Fe(III) chloride, was comparable with the efficiency for the SE. The efficiency of this process with regard to the sludge digester liquors (SDL) was significantly higher, i.e. 65-70% for both DON and CON. Ion exchange process with strongly acidic cation exchange resin (without pH correction) resulted in a relatively small efficiency of DON removal (<15%), and negligible efficiency of CON removal (<10%). Furthermore, ultrafiltration (0.015 μm) of SE and TWAS resulted in a relatively low efficiency of DON removal (10-13% and 10-20% respectively). Ultrafiltration was found to be more effective for DON removal from SDL (41-68%).
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.2166/wst.2014.267
- License
- Copyright (2014 IWA Publishing)
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
WATER SCIENCE AND TECHNOLOGY
no. 70,
edition 3,
pages 561 - 569,
ISSN: 0273-1223 - Language:
- English
- Publication year:
- 2014
- Bibliographic description:
- Czerwionka K., Mąkinia J.: Dissolved and colloidal organic nitrogen removal from WWTP effluents and reject waters using physical-chemical processes// WATER SCIENCE AND TECHNOLOGY. -Vol. 70, iss. 3 (2014), s.561-569
- DOI:
- Digital Object Identifier (open in new tab) 10.2166/wst.2014.267
- Verified by:
- Gdańsk University of Technology
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