Process Consideration to Achieve Nitrogen Removal in a Moving-Bed Biofilm Reactor

The paper presents research of a prototype moving bed biofilm reactor (MBBR). The device was used for the post-denitrification process and was installed at the end of a technological system consisting of a septic tank and two trickling filters. The concentrations of suspended biomass and biomass attached on the EvU Perl moving bed surface were determined. The impact of the external organic carbon concentration on the denitrification rate and efficiency of total nitrogen removal was also examined. The study showed that the greater part of the biomass was in the suspended form and only 6% of the total biomass was attached to the surface of the moving bed. Abrasion forces between carriers of the moving bed caused the fast stripping of attached microorganisms and formation of flocs. Thanks to immobilization of a small amount of biomass, the MBBR was less prone to leaching of the biomass and the occurrence of scum and swelling sludge. It was revealed that the maximum rate of denitrification was an average of 0.73 gN-NO3/gDM·d (DM: dry matter), and was achieved when the reactor was maintained in external organic carbon concentration exceeding 300 mgO2/dm3 chemical oxygen demand. The reactor proved to be an effective device enabling the increase of total nitrogen removal from 53.5% to 86.0%.

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Enhanced simultaneous nitri-denitrification in aerobic moving bed biofilm reactor containing polyurethane foam-based carrier media

Water Science & Technology ◽

10.2166/wst.2019.077 ◽

2019 ◽

Vol 79 (3) ◽

pp. 510-517 ◽

Cited By ~ 3

Author(s):

Magdum Sandip ◽

V. Kalyanraman

Keyword(s):

Chemical Oxygen Demand ◽

Nitrogen Removal ◽

Oxygen Demand ◽

Biofilm Reactor ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Removal Capacity ◽

Pu Foam ◽

Removal Efficiencies ◽

Biofilm Support

Abstract Fluidization of carrier media for biofilm support and growth defines the moving bed biofilm reactor (MBBR) process. Major MBBR facilities apply virgin polyethylene (PE)-based circular plastic carrier media. Various carriers were studied to replace these conventional carriers, but polyurethane (PU) foam-based carrier media has not been much explored. This study evaluates the potential of PU foam carrier media in aerobic MBBR process for simultaneous nitri-denitrification (SND). Two parallel reactors loaded with conventional PE plastic (circular) and PU foam (cubical) carriers compared for their removal efficiencies of chemical oxygen demand (COD) and nitrogen contaminants from wastewater. Results indicate that average COD removal in MBBR containing PE plastic carrier media was 81%, compared to 83% in MBBR containing PU foam. Average ammonical and total nitrogen reduction was 71% and 59% for PU foam-based MBBR, compared to 60% and 42% for PE plastic-based MBBR. SND-based nitrogen removal capacity was doubled in aerobic MBBR filled with PU foam carrier media (27%), than MBBR containing PE plastic carrier media (13%). Cost economics also governs the commercial advantage for the application of PU foam-based carrier media in the MBBR process.

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Biological Nitrogen Removal in Moving Bed Biofilm Reactor Using Ibuprofen as Carbon Source

Water Air & Soil Pollution ◽

10.1007/s11270-015-2690-1 ◽

2016 ◽

Vol 227 (2) ◽

Cited By ~ 8

Author(s):

Edris Hoseinzadeh ◽

Abbas Rezaee ◽

Hooshyar Hossini

Keyword(s):

Carbon Source ◽

Nitrogen Removal ◽

Biofilm Reactor ◽

Biological Nitrogen Removal ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Biological Nitrogen

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High Rate Nitrogen Removal Process by Moving Bed Biofilm Reactor "PABIO DENI".

JAPAN TAPPI JOURNAL ◽

10.2524/jtappij.56.1612 ◽

2002 ◽

Vol 56 (11) ◽

pp. 1612-1619

Author(s):

Hiroyuki Chifuku ◽

Masahiro Kaji

Keyword(s):

Nitrogen Removal ◽

Biofilm Reactor ◽

High Rate ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Removal Process

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Application of a moving-bed biofilm reactor for sulfur-oxidizing autotrophic denitrification

Water Science & Technology ◽

10.2166/wst.2017.617 ◽

2017 ◽

Vol 77 (4) ◽

pp. 1027-1034 ◽

Cited By ~ 7

Author(s):

Yan-Xiang Cui ◽

Di Wu ◽

Hamish R. Mackey ◽

Ho-Kwong Chui ◽

Guang-Hao Chen

Keyword(s):

Wastewater Treatment ◽

Steady State ◽

Removal Efficiency ◽

Nitrogen Removal ◽

Biofilm Reactor ◽

Laboratory Scale ◽

Autotrophic Denitrification ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Sulfur Oxidizing

Abstract Sulfur-oxidizing autotrophic denitrification (SO-AD) was investigated in a laboratory-scale moving-bed biofilm reactor (MBBR) at a sewage temperature of 22 °C. A synthetic wastewater with nitrate, sulfide and thiosulfate was fed into the MBBR. After 20 days' acclimation, the reduced sulfur compounds were completely oxidized and nitrogen removal efficiency achieved up to 82%. The operation proceeded to examine the denitrification by decreasing hydraulic retention time (HRT) from 12 to 4 h in stages. At steady state, this laboratory-scale SO-AD MBBR achieved the nitrogen removal efficiency of 94% at the volumetric loading rate of 0.18 kg N·(mreactor3·d)−1. The biofilm formation was examined periodically: the attached volatile solids (AVS) gradually increased corresponding to the decrease of HRT and stabilized at about 1,300 mg AVS·Lreactor−1 at steady state. This study demonstrated that without adding external organic carbon, SO-AD can be successfully applied in moving-bed carriers. The application of SO-AD MBBR has shown the potential for sulfur-containing industrial wastewater treatment, brackish wastewater treatment and the upgrading of the activated sludge system. Moreover, the study provides direct design information for the full-scale MBBR application of the sulfur-cycle based SANI process.

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Upgrading to nitrogen removal with the kmt moving bed biofilm process

Water Science & Technology ◽

10.2166/wst.1994.0608 ◽

1994 ◽

Vol 29 (12) ◽

pp. 185-195 ◽

Cited By ~ 27

Author(s):

Bjørn Rusten ◽

Jon G. Siljudalen ◽

Bjørnar Nordeidet

Keyword(s):

Carbon Source ◽

Nitrogen Removal ◽

Retention Time ◽

Mechanical Treatment ◽

Hydraulic Retention Time ◽

Biofilm Reactor ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Biofilm Process ◽

Full Scale Tests

A new moving bed biofilm reactor (MBBR) has been developed in Norway. The biomass is attached to carrier elements that move freely along with the water in the reactor. It has been demonstrated that existing, high loaded, activated sludge plants can easily be upgraded to nitrogen removing MBBR plants. With chemically enhanced mechanical treatment, full scale tests showed that 80-90% total nitrogen could be removed in a MBBR plant at a total empty bed hydraulic retention time (HRT) of 2.6 hours. The plant was operated in the post-denitrification mode, using methanol as an external carbon source.

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