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Ammonium removal by partial nitritation and Anammox processes from wastewater with increased salinity
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering. ] Lviv Polytech Natl Univ, Dept Ind Ecol & Sustainable Environm Management, Ukraine.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2015 (English)In: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 36, no 5, 595-604 p.Article in journal (Refereed) Published
Abstract [en]

This work is dedicated to the biological treatment of wastewater with increased salinity using a combination of partial nitritation and Anammox processes. Two one-stage deammonification moving bed biofilm reactors were operated with the increase in NaCl concentration every two weeks by 5 and 2.5 g/L. The strategy with a step of 5 g/L of salinity increase led to complete inhibition of the process at the salinity level of 15 g/L. The strategy with a step of 2.5 g/L gave possibility to adapt bacteria to the elevated salinity. After reaching the salinity level of 10 g NaCl/L, the reactor was operated during 92 days with a nitrogen removal rate of 0.39 +/- 0.19 g N/(m(2)center dot day) (0.078 +/- 0.038 kg N/m(3)center dot day) and an average nitrogen removal efficiency of 59%. It was shown that conductivity cannot be used for monitoring the process when a reactor is treating wastewater with increased salinity, whereas pH can be correlated to effluent ammonium concentration regardless of wastewater salinity.

Place, publisher, year, edition, pages
2015. Vol. 36, no 5, 595-604 p.
Keyword [en]
activity, wastewater, Anammox, nitrification, ammonium
National Category
Environmental Management
Identifiers
URN: urn:nbn:se:kth:diva-160359DOI: 10.1080/09593330.2014.953601ISI: 000348672000006Scopus ID: 2-s2.0-84964240162OAI: oai:DiVA.org:kth-160359DiVA: diva2:791222
Note

QC 20150227

Available from: 2015-02-27 Created: 2015-02-19 Last updated: 2017-12-04Bibliographically approved
In thesis
1. Anammox-based systems for nitrogen removal from mainstream municipal wastewater
Open this publication in new window or tab >>Anammox-based systems for nitrogen removal from mainstream municipal wastewater
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Nitrogen removal from municipal wastewater with the application of deammonification process offers an operational cost reduction, especially if it is combined with a maximal use of organic content of wastewater for biogas production. In this thesis, two approaches for integration of the deammonification process into the municipal wastewater treatment scheme were studied.

The first approach is based on ammonium concentration from municipal wastewater by ion exchange followed by biological removal of ammonium from the concentrated stream by deammonification process. Experiments with synthetic and real municipal wastewater showed that strong acid cation resin is suitable for ammonium concentration due to its high exchange capacity and fast regeneration. Since NaCl was used for regeneration of ion exchange materials, spent regenerant had elevated salinity. The deammonification biomass was adapted to NaCl content of 10-15 g/L by step-wise salinity increase. The technology was tested in batch mode with 99.9 % of ammonium removal from wastewater with ion exchange and up to 95 % of nitrogen removal from spent regenerant by deammonification process.

The second studied approach was to apply anammox process to low-concentrated municipal wastewater in a moving bed biofilm reactor (MBBR) and integrated fixed film activated sludge (IFAS) system without a pre-concentration step. After a 5 months period of transition to mainstream wastewater the pilot plant was operated during 22 months and stable performance of one-stage deammonification was proven. Clear advantage of IFAS system was shown. The highest stable nitrogen removal efficiency of 70 % and a nitrogen removal rate of 55 g N/(m3·d) was reached. Moreover, the influence of operation conditions on competition between ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) was studied by literature review, batch tests and continuous pilot plant operation.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2017. 53 p.
Series
TRITA-LWR. PHD, ISSN 1650-8602 ; 2017:01
Keyword
Wastewater, Nitrogen removal, Ion exchange, Deammonification, Anammox, Mainstream
National Category
Water Treatment
Research subject
Land and Water Resources Engineering
Identifiers
urn:nbn:se:kth:diva-202960 (URN)978-91-7729-317-0 (ISBN)
Public defence
2017-04-06, F3, Lindstedtsvägen 26, Stockholm, 09:30 (English)
Opponent
Supervisors
Note

QC 20170309

Available from: 2017-03-09 Created: 2017-03-08 Last updated: 2017-03-09Bibliographically approved

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