Biological pretreatment of a chemical plant wastewater in high-rate moving bed biofilm reactors

The Moving Bed Biofilm Reactor (MBBR), where the biomass is attached to small plastic carrier elements that move freely along with the water in the reactors, has been tested for biological pretreatment of a complex chemical industry wastewater. The MBBRs were tested at organic loads up to 53 g BOD5/m2d and always removed the easily biodegradable BOD fraction, ranging from about 60 to 80%. At organic loads from 10 to 20 g BOD5/m2d slowly biodegradable organic matter was also metabolized, sometimes removing more than 95% BOD5. After polishing in an activated sludge unit, the final effluent had an average concentration of only 3.4 mg filtered BOD5/l. With a very high specific biofilm surface area, MBBRs followed by activated sludge offer a compact process combination for complete biological treatment of chemical industry wastewaters.

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Biological pretreatment of a chemical plant wastewater in high-rate moving bed biofilm reactors

Water Science & Technology ◽

10.1016/s0273-1223(99)00286-3 ◽

1999 ◽

Vol 39 (10-11) ◽

Cited By ~ 7

Keyword(s):

Chemical Plant ◽

High Rate ◽

Biological Pretreatment ◽

Moving Bed ◽

Biofilm Reactors

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High-rate wastewater treatment combining a moving bed biofilm reactor and enhanced particle separation

Water Science & Technology ◽

10.2166/wst.2005.0685 ◽

2005 ◽

Vol 52 (10-11) ◽

pp. 117-127 ◽

Cited By ~ 6

Author(s):

H. Helness ◽

E. Melin ◽

Y. Ulgenes ◽

P. Järvinen ◽

V. Rasmussen ◽

...

Keyword(s):

Organic Matter ◽

Wastewater Treatment ◽

Pilot Scale ◽

Biofilm Reactor ◽

High Rate ◽

Treatment Concept ◽

Moving Bed ◽

Biofilm Reactors ◽

Biofilm Process ◽

Total Residence Time

Many cities around the world are looking for compact wastewater treatment alternatives since space for treatment plants is becoming scarce. In this paper development of a new compact, high-rate treatment concept with results from experiments in lab-scale and pilot-scale are presented. The idea behind the treatment concept is that coagulation/floc separation may be used to separate suspended and colloidal matter (resulting in >70% organic matter removal in normal wastewater) while a high-rate biofilm process (based on Moving Bed™ biofilm reactors) may be used for removing low molecular weight, easily biodegradable, soluble organic matter. By using flotation for floc/biomass separation, the total residence time for a plant according to this concept will normally be <1 hour. A cationic polymer combined with iron is used as coagulant at low dosages (i.e. 1–2mg polymer/l, 5–10mg Fe/l) resulting in low sludge production (compared to conventional chemical treatment) and sufficient P-removal.

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Treatment of Dairy Wastewater in a Novel Moving Bed Biofilm Reactor

Water Science & Technology ◽

10.2166/wst.1992.0451 ◽

1992 ◽

Vol 26 (3-4) ◽

pp. 703-711 ◽

Cited By ~ 33

Author(s):

B. Rusten ◽

H. Ødegaard ◽

A. Lundar

Keyword(s):

Surface Area ◽

Pilot Plant ◽

Industrial Effluents ◽

Biofilm Reactor ◽

Dairy Wastewater ◽

Test Results ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Biofilm Reactors ◽

In Series

A novel moving bed biofilm reactor has been developed, where the biofilm grows on small, free floating plastic elements with a large surface area and a density slightly less than 1.0 g/cm3. The specific biofilm surface area can be regulated as required, up to a maximum of approximately 400 m2/m3. The ability to remove organic matter from concentrated industrial effluents was tested in an aerobic pilot-plant with two moving bed biofilm reactors in series and a specific biofilm surface area of 276 m2/m3. Treating dairy wastewater, the pilot-plant showed 85% and 60% COD removal at volumetric organic loading rates of 500 g COD/m3h and 900 g COD/m3h respectively. Based on the test results, the moving bed biofilm reactors should be very suitable for treatment of food industry effluents.

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Small Wastewater Treatment Plants Based on Moving Bed Biofilm Reactors

Water Science & Technology ◽

10.2166/wst.1993.0253 ◽

1993 ◽

Vol 28 (10) ◽

pp. 351-359 ◽

Cited By ~ 7

Author(s):

H. Ødegaard ◽

B. Rusten ◽

H. Badin

Keyword(s):

Wastewater Treatment ◽

Pollution Control ◽

Wastewater Treatment Plants ◽

Treatment Plant ◽

Biofilm Reactor ◽

Chemical Plants ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Biofilm Reactors ◽

Control Authority

In 1988 the State Pollution Control Authority in Norway made recommendations regarding process designs for small wastewater treatment plants. Amongst these were recommendations for biological/chemical plants where biofilm reactors were used in combination with pretreatment in large septic tanks and chemical post treatment. At the same time the socalled “moving bed biofilm reactor” (MBBR) was developed by a Norwegian company. In this paper, experiences from a small wastewater treatment plant, based on the MBBR and on the recommendations mentioned, will be presented.

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Steady-state modeling and evaluation of partial nitrification-anammox (PNA) for moving bed biofilm reactor and integrated fixed-film activated sludge processes treating municipal wastewater

Journal of Water Process Engineering ◽

10.1016/j.jwpe.2019.100854 ◽

2019 ◽

Vol 31 ◽

pp. 100854 ◽

Cited By ~ 12

Author(s):

Chen Tao ◽

Mohamed A. Hamouda

Keyword(s):

Steady State ◽

Activated Sludge ◽

Municipal Wastewater ◽

Biofilm Reactor ◽

Partial Nitrification ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Fixed Film ◽

Activated Sludge Processes

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Increasing the capacity for treatment of chemical plant wastewater by replacing existing suspended carrier media with Kaldnes Moving Bed(tm) media at a plant in Singapore

Water Science & Technology ◽

10.2166/wst.2004.0841 ◽

2004 ◽

Vol 49 (11-12) ◽

pp. 199-205 ◽

Cited By ~ 8

Author(s):

F.G. Wessman ◽

E. Yan Yuegen ◽

Q. Zheng ◽

G. He ◽

T. Welander ◽

...

Keyword(s):

Organic Carbon ◽

Activated Sludge ◽

Normal Operation ◽

Organic Load ◽

Moving Bed ◽

Biofilm Carrier ◽

L 51 ◽

Biofilm Process ◽

Suspended Carrier ◽

Final Effluent

The Kaldnes biomedia K1, which is used in the patented Kaldnes Moving Bed(tm) biofilm process, has been tested along with other types of biofilm carriers for biological pretreatment of a complex chemical industry wastewater. The main objective of the test was to find a biofilm carrier that could replace the existing suspended carrier media and at the same time increase the capacity of the existing roughing filter-activated sludge plant by 20% or more. At volumetric organic loads of 7.1 kg COD/m3/d the Kaldnes Moving Bed™ process achieved much higher removal rates and much lower effluent concentrations than roughing filters using other carriers. The Kaldnes roughing stage achieved more than 85% removal of organic carbon and more than 90% removal of BOD5 at the tested organic load, which was equivalent to a specific biofilm surface area load of 24 g COD/m2/d. Even for the combined roughing filter-activated sludge process, the Kaldnes carriers outperformed the other carriers, with 98% removal of organic carbon and 99.6% removal of BOD5. The Kaldnes train final effluent concentrations were only 22 mg FOC/L and 7 mg BOD5/L. Based on the successful pilot testing, the full-scale plant was upgraded with Kaldnes Moving Bed™ roughing filters. During normal operation the upgraded plant has easily met the discharge limits of 100 mg COD/L and 50 mg SS/L. For the month of September 2002, with organic loads between 100 and 115% of the design load for the second half of the month, average effluent concentrations were as low as 9 mg FOC/L, 51 mg COD/L and 12 mg SS/L.

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