Tertiary nitrogen removal using simultaneous partial nitrification, anammox and denitrification (SNAD) process in packed bed reactor

2017 ◽  
Vol 120 ◽  
pp. 36-42 ◽  
Author(s):  
W.H. Chen ◽  
Y.A. Chiang ◽  
Y.T. Huang ◽  
S.Y. Chen ◽  
S. Sung ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Partial Nitrification ◽  
Tertiary Nitrogen

The Influence of Different Support Materials to Treatment Efficiency in Packed Bed Reactors

1992 ◽  
Vol 25 (1) ◽  
pp. 119-122 ◽  
Author(s):  
M. Roš ◽  
J. Vrtovšek ◽  
M. Dular
Keyword(s):  
Activated Carbon ◽  
Ceramic Material ◽  
Nitrogen Removal ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Support Material ◽  
Packed Bed Reactors ◽  
Support Materials ◽  
Volumetric Loading ◽  
Granulated Activated Carbon

Biological treatment, especially nitrogen removal, in an upflow packed bed reactor with immobilised biomass was studied. As a support material granulated activated carbon (GAC), ceramic material (crush brick), brown coal and cut polyethylene tubes were used. The size of the support material was 4 to 6 millimetres. In laboratory scale studies pharmaceutical wastewater was treated. Volumetric loading was from 6.8 to 7.6 g/l/day. Results of investigations showed us that aerated packed bed reactors are usable for nitrogen removal because in the reactor originates aerobic and anoxic conditions. In anoxic cones the denitrification of nitrate, nitrite and ammonia ions takes place. The most effective systems for nitrogen removal were reactors filled with granulated activated carbon and with ceramic material. In the reactor with granulated activated carbon also colour from wastewater was degraded.

An integrated O/A two-stage packed-bed reactor (INT-PBR) for total nitrogen removal from low organic carbon wastewater

2017 ◽  
Vol 328 ◽  
pp. 894-903 ◽  
Author(s):  
Wei Xing ◽  
Wenqiang Zhang ◽  
Desheng Li ◽  
Jinlong Li ◽  
Fangfang Jia ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Two Stage ◽  
Total Nitrogen Removal

Treatment of landfill leachate by a pilot-scale modified Ludzack-Ettinger and sulfur-utilizing denitrification process

2004 ◽  
Vol 50 (6) ◽  
pp. 141-148
Author(s):  
J.-H. Bae ◽  
I.-S. Lee ◽  
M.-S. Jang ◽  
K.-H. Ahn ◽  
S.-H. Lee
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Landfill Leachate ◽  
Loading Rate ◽  
Removal Rate ◽  
Packed Bed ◽  
Pilot Scale ◽  
Packed Bed Reactor ◽  
Treatment System ◽  
Flow Mode

Nitrogen removal efficiency of a pilot-scale system consisted of Modified Ludzack-Ettinger (MLE) followed by sulfur-utilizing denitrification (SUDNR) process was evaluated with a landfill leachate. For SUDNR, a down-flow mode sulfur packed bed reactor (SPBR) filled with sulfur and limestone particles was used. Although total nitrogen removal efficiency of the MLE process was about 80% at the recycle ratio of 4, effluent contained 350-450 mg/L NO3--N. Up to a loading rate of 1.2 kg NO3--N/m3-day, the SPBR could achieve complete removal of nitrate, and nitrate removal rate was kept to that level even at higher loading rate. When a COD/N ratio of MLE process was maintained at 2 instead of 4, more organics with molecular weight less than 500 were utilized for heterotrophic denitrification although denitrification was not complete with the lack of electron donors. Clogging in the SPBR, mainly by the accumulation of nitrogen gas in the pores, could easily be removed by introducing the effluent in an upward direction for 1 min at 1 hr intervals. The proposed treatment system could achieve nitrate free effluent with a slight increase in chemical cost. Furthermore, depending on further COD removal requirement after biological treatment, the proposed treatment system can be an economical solution.

Continuous production of a chiral amine in a packed bed reactor with co-immobilized amine dehydrogenase and formate dehydrogenase

2021 ◽  
Vol 407 ◽  
pp. 127065
Author(s):  
Robert D. Franklin ◽  
Joshua A. Whitley ◽  
Adam A. Caparco ◽  
Bettina R. Bommarius ◽  
Julie A. Champion ◽  
...  
Keyword(s):  
Formate Dehydrogenase ◽  
Continuous Production ◽  
Packed Bed ◽  
Packed Bed Reactor ◽  
Chiral Amine ◽  
Amine Dehydrogenase

scholarly journals Light as a Novel Inhibitor of Nitrite-Oxidizing Bacteria (NOB) for the Mainstream Partial Nitrification of Wastewater Treatment

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 346
Author(s):  
Keugtae Kim ◽  
Yong-Gyun Park
Keyword(s):  
Wastewater Treatment ◽  
Blue Light ◽  
Nitrogen Removal ◽  
Municipal Wastewater ◽  
Partial Nitrification ◽  
Biological Nutrient Removal ◽  
Nitrite Accumulation ◽  
Light Illumination ◽  
Ammonia Oxidizing Bacteria ◽  
Nitrite Oxidizing Bacteria

Conventional biological nutrient removal processes in municipal wastewater treatment plants are energy-consuming, with oxygen supply accounting for 45–75% of the energy expenditure. Many recent studies examined the implications of the anammox process in sidestream wastewater treatment to reduce energy consumption, however, the process did not successfully remove nitrogen in mainstream wastewater treatment with relatively low ammonia concentrations. In this study, blue light was applied as an inhibitor of nitrite-oxidizing bacteria (NOB) in a photo sequencing batch reactor (PSBR) containing raw wastewater. This simulated a biological nitrogen removal system for the investigation of its application potential in nitrite accumulation and nitrogen removal. It was found that blue light illumination effectively inhibited NOB rather than ammonia-oxidizing bacteria due to their different sensitivity to light, resulting in partial nitrification. It was also observed that the NOB inhibition rates were affected by other operational parameters like mixed liquor suspended solids (MLSS) concentration and sludge retention time (SRT). According to the obtained results, it was concluded that the process efficiency of partial nitrification and anammox (PN/A) could be significantly enhanced by blue light illumination with appropriate MLSS concentration and SRT conditions.

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