Open AccessStart-up of a full-scale partial nitritation-anammox MBBR without inoculum at Klagshamn WWTP
Author(s) -
Ì. Dimitrova,
Agnieszka Dąbrowska,
Sara Elisabet Margareta Ekström
Publication year - 2020
Publication title -
water science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.406
H-Index - 137
eISSN - 1996-9732
pISSN - 0273-1223
DOI - 10.2166/wst.2020.271
Subject(s) - anammox , wastewater , dewatering , sewage treatment , moving bed biofilm reactor , effluent , pulp and paper industry , chemistry , ammonium , bioreactor , dilution , sequencing batch reactor , ammonia , environmental science , nitrogen , environmental engineering , biofilm , denitrification , biology , bacteria , biochemistry , physics , geotechnical engineering , denitrifying bacteria , organic chemistry , engineering , genetics , thermodynamics
Partial nitritation and anaerobic ammonium oxidation (PNA) is a useful process for the treatment of nitrogen-rich centrate from the dewatering of anaerobically digested sludge. A one-stage PNA moving bed biofilm reactor (MBBR) was started up without inoculum at Klagshamn wastewater treatment plant, southern Sweden. The reactor was designed to treat up to 200 kgN d−1, and heated dilution water was used during start-up. The nitrogen removal was >80% after 111 days of operation, and the nitrogen removal rate reached 1.8 gN m−2 d1 at 35 °C. The start-up period of the reactor was comparable to that of inoculated full-scale systems. The operating conditions of the system were found to be important, and online control of the free ammonia concentration played a crucial role. Ex situ batch activity tests were performed to evaluate process performance.
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