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Ammonia Nitrogen Transformations in a Reactor with Aggregate made of Sewage Sludge Combustion Fly Ash
Author(s) -
Rodziewicz Joanna,
Mielcarek Artur,
Janczukowicz Wojciech,
Białowiec Andrzej,
GotkowskaPłachta Anna,
Proniewicz Marcin
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14609975747009
Subject(s) - nitrification , chemistry , effluent , ammonia , wastewater , nitrogen , sewage sludge , nitrate , sewage , sewage treatment , fly ash , pulp and paper industry , combustion , waste management , environmental chemistry , environmental engineering , environmental science , organic chemistry , engineering
The influence of light weight aggregate made of fly ash from sewage sludge thermal treatment (FASSTT LWA) on ammonia nitrogen metabolism, and on quantitative and qualitative changes of microorganisms colonizing the filling, was investigated. Two reactors were used in the experiment. The first was filled with gravel, the other with FASSTT LWA. The reactors were operated with a wastewater hydraulic loading rate of 5 mm 3 mm −2 d −1 . During the eleven‐week experiment, high efficiency of ammonia removal was observed. The lower concentrations of nitrites and nitrates in the effluent indicate that ammonia nitrogen removal resulted not just from nitrification. Nitrate concentration increase was reflected in a decrease in nitrogen removal efficiency. One possible explanation for this phenomenon is that in the period when ammonia nitrogen and nitrites were present in the reactor's FASSTT LWA filling, facilitating conditions occurred for the deammonification process.