scholarly journals Fast start-up of the single-stage nitrogen removal using anammox and partial nitritation (SNAP) from conventional activated sludge in a membrane-aerated biofilm reactor

2018 ◽  
Vol 266 ◽  
pp. 151-157 ◽  
Author(s):  
Matheus Ribeiro Augusto ◽  
Priscila Rosseto Camiloti ◽  
Theo Syrto Octavio de Souza
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Biofilm Reactor ◽  
Single Stage ◽  
Partial Nitritation ◽  
Conventional Activated Sludge ◽  
Start Up ◽  
Fast Start

Microbial characteristics of a CANON reactor during the start-up period seeding conventional activated sludge

2013 ◽  
Vol 67 (3) ◽  
pp. 635-643 ◽  
Author(s):  
Tao Liu ◽  
Dong Li ◽  
Hui-ping Zeng ◽  
Xiao-yan Chang ◽  
Jie Zhang
Keyword(s):  
Activated Sludge ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Biofilm Reactor ◽  
Conventional Activated Sludge ◽  
Community Shift ◽  
Start Up ◽  
Bacterial Morphology ◽  
Nitrite Oxidizing Bacteria ◽  
Canon Process

An up-flow oxygen-controlled biofilm reactor filled with volcanic filter was used for a completely autotrophic nitrogen-removal over nitrite (CANON) process. The reactor was successfully established by seeding conventional activated sludge at ambient temperature without additional biomass inoculation. An average total nitrogen (TN) removal rate of 1.1 kg·(m3 d)−1 was achieved after 180 days' operation. The bacterial morphology, community structure and spatial distribution of nitrogen removal microorganisms were analyzed by using some molecular biotechniques. Denaturant gel gradient electrophoresis (DGGE) profiles showed a distinct community shift of nitrite oxidizing bacteria (NOB) during the start-up period, which was not the same as that of aerobic ammonium-oxidizing bacteria (AerAOB) or anaerobic ammonium-oxidizing bacteria (AnAOB). Phylogenetic results indicated the predominance of Nitrosomonas, ‘Candidatus Brocadia fulgida’ and Nitrobacter for nitrogen removal in the system, all of which coexisted without a distinguishable niche on the biofilm.

Fast start-up of PN/A process in a single-stage packed bed and mechanism of nitrogen removal

2020 ◽  
Vol 27 (32) ◽  
pp. 40483-40494
Author(s):  
Yaqi Xie ◽  
Chuanyi Zhang ◽  
Limei Yuan ◽  
Qieyuan Gao ◽  
Hai Liang ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Packed Bed ◽  
Single Stage ◽  
Start Up ◽  
Fast Start

scholarly journals Start-up of a full-scale partial nitritation-anammox MBBR without inoculum at Klagshamn WWTP

2020 ◽  
Vol 81 (9) ◽  
pp. 2033-2042 ◽  
Author(s):  
Ivelina Dimitrova ◽  
Agnieszka Dabrowska ◽  
Sara Ekström
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Treatment Plant ◽  
Full Scale ◽  
Biofilm Reactor ◽  
Operating Conditions ◽  
Ex Situ ◽  
Ammonium Oxidation ◽  
Partial Nitritation ◽  
Start Up

Abstract 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.

Development of single-stage nitrogen removal using anammox and partial nitritation (SNAP) and its treatment performances

2006 ◽  
Vol 53 (6) ◽  
pp. 83-90 ◽  
Author(s):  
K. Furukawa ◽  
P.K. Lieu ◽  
H. Tokitoh ◽  
T. Fujii
Keyword(s):  
Nitrogen Removal ◽  
Laser Scanning ◽  
Dna Analysis ◽  
Experimental Studies ◽  
Biofilm Reactor ◽  
Single Stage ◽  
Confocal Laser ◽  
Anammox Bacteria ◽  
Partial Nitritation ◽  
Operational Conditions

Single-stage Nitrogen removal using Anammox and Partial nitritation (SNAP) process was newly developed as an economical nitrogen removal process for ammonium rich wastewaters. The experimental studies for the evaluation of SNAP process were carried out using a novel biofilm reactor, in which hydrophilic net-type acryl fiber biomass carrier was applied. This SNAP reactor was operated under operational conditions of pH 7.5–7.7, 35 °C and DO 2–3 mg/L, and 60 to 80% of influent NH4-N was removed under loading rate of 0.48 kg-N/m3/d. Through the DNA analysis of the attached sludge, it was made clear that ammonium oxidizing bacteria (AOB) and anammox bacteria coexisted in the attach-immobilized sludge on the acryl fiber biomass carrier. Favorable conditions for the growth of anammox bacteria were created inside attach-immobilized nitrifying sludge. Two kinds of anammox bacteria and two kinds of AOB were detected in the SNAP sludge. Existence ratios of anammox and AOB were estimated to be 15% and 8.7%, respectively, based on the obtained clone numbers. This coexisting condition was confirmed by the FISH image of SNAP sludge and its confocal laser scanning microscope.

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