Dairy wastewater treatment by chemical coagulation and adsorption on modified dried activated sludge: a pilot-plant study

The Oxley Creek wastewater treatment plant is a conventional 185,000 EP BOD removal activated sludge plant that is to be upgraded for nitrogen removal to protect its receiving water bodies, the Brisbane River and Moreton Bay. Suspended carrier technology is one possible way of upgrading this activated sludge wastewater treatment plant for nitrogen removal. Freely moving plastic media is added to the aeration zone, providing a growth platform for nitrifying bacteria and increasing the effective solids residence time (SRT). This paper presents the results from operating a pilot plant for 7 months at the Oxley Creek WWTP in Brisbane, Australia. Natrix Major 12/12 plastic media, developed by ANOX (Lund, Sweden), was trialed in the pilot plant. The pilot plant was operated with a mixed liquor suspended solids concentration of 1220 mg/L and a total hydraulic residence time of 5.4 hours, similar to the operating conditions in the full-scale Stage 1&2 works at the Oxley Creek WWTP. The plastic carriers were suspended in the last third of the bioreactor volume, which was aerated to a DO setpoint of 4.0 mg/L. The first third of the bioreactor volume was made anoxic and the second third served for carbon removal, being aerated to a DO setpoint of 0.5 mg/L. The results from the pilot plant indicate that an average effluent total inorganic nitrogen concentration (ammonia-N plus NOx−N) of less than 12 mg/L is possible. However, the effluent ammonia concentrations from the pilot plant showed large weekly fluctuations due to the intermittent operation of the sludge dewatering centrifuge returning significant ammonia loads to the plant on three days of the week. Optimising denitrification was carried out by lowering the DO concentration in the influent and in the carbon removal reactor. The results from the pilot plant study show that the Oxley Creek WWTP could be upgraded for nitrogen removal without additional tankage, using suspended carrier technology.

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OPTIMISATION OF W ASTEW A TER TREATMENT PLANTS BY MEANS OF COMPUTER MODELS

Water Science & Technology ◽

10.2166/wst.1994.0186 ◽

1994 ◽

Vol 30 (4) ◽

pp. 181-190 ◽

Cited By ~ 3

Author(s):

René Dupont ◽

Ole Sinkjær

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Pilot Plant ◽

Wastewater Treatment Plants ◽

Treatment Plant ◽

Operational Strategies ◽

Nitrification Process ◽

Computer Based ◽

Calibration Tool ◽

Denitrification Process

The objective of the work presented is to demonstrate how computer based models can be used to improve the effluent quality from wastewater treatment plants by optimisation of the operation. The investigation was carried out in connection with pilot plant investigations at Damhusllen Wastewater Treatment Plant in order to establish the design basis for upgrading the treatment plants in the city of Copenhagen. Calibration of the model was done with thorough characterisation of the wastewater and the activated sludge as the primary calibration tool. Special attention was paid to the nitrification process, which by previous investigations was shown to be occasionally inhibited. Model constants for the nitrification process were detennined from experiments. Default constants were used for nearly all other constants. The pilot plant was optimized with the calibrated model. Different operational strategies for improvement of the denitrification process were tested. The denitrification process was operated relatively poorly at the time for the optimisation. The calibration showed that it was possible to calibrate the model using the characterization of the wastewater and the activated sludge as the primary calibration tool. Further it was shown that the calihrated model could be used as a tool for optimising the operation of the pilot plant. The suggested operation correlated well with the practical realisable operation.

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SIMULATED DAIRY WASTEWATER TREATMENT IN A PILOT PLANT SCALE MAGNETO-ACTIVE HYBRID ANAEROBIC BIOFILM REACTOR (MA-HABR)

Brazilian Journal of Chemical Engineering ◽

10.1590/0104-6632.20180352s20170036 ◽

2018 ◽

Vol 35 (2) ◽

pp. 553-562 ◽

Cited By ~ 1

Author(s):

Marcin Dębowski ◽

Marcin Zieliński ◽

Marta Kisielewska ◽

Mirosław Krzemieniewski ◽

Monika Makowska ◽

...

Keyword(s):

Wastewater Treatment ◽

Pilot Plant ◽

Biofilm Reactor ◽

Dairy Wastewater ◽

Pilot Plant Scale

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Integrating an anaerobic Bio-nest and an aerobic EMMC process as pretreatment of dairy wastewater for reuse: a pilot plant study

Clean Technologies and Environmental Policy ◽

10.1007/s10098-009-0211-x ◽

2009 ◽

Vol 12 (3) ◽

pp. 301-311 ◽

Cited By ~ 3

Author(s):

Piyalerg Kongsil ◽

Joshua Lelemia Irvine ◽

P. Y. Yang

Keyword(s):

Pilot Plant ◽

Dairy Wastewater ◽

Pilot Plant Study

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Experience with Two-Stage Activated Sludge Plants for Industrial Wastewaters in Korea

Water Science & Technology ◽

10.2166/wst.1992.0528 ◽

1992 ◽

Vol 25 (4-5) ◽

pp. 427-428 ◽

Cited By ~ 1

Author(s):

R. Schulze-Rettmer ◽

S. S. Kim ◽

S. S. Son

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Wastewater Treatment Plant ◽

Pilot Plant ◽

Treatment Plant ◽

Activated Sludge Process ◽

Two Stage ◽

Industrial Wastewaters ◽

Textile Dyeing ◽

One Year

The two-stage activated sludge process (AB-process, i.e. adsorption activated sludge process) invented by Boehnke was successfully applied to several municipal and industrial wastewaters in Korea. The first large wastewater treatment plant for the combined effluents of 22 textile dyeing companies was constructed in Taegu and started operation in 1989. Two years earlier pilot plant runs were performed. The AB-process proved to be superior to any other activated sludge process. BOD was reduced from 1200 mg/l down to 24 mg/l. In the meantime in Korea several further AB-process treatment plants were constructed, the overall planning and constructing period being not longer than one year.

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Pilot Plant Study on High Concentration Food Additives Wastewater Treatment

2009 International Conference on Energy and Environment Technology ◽

10.1109/iceet.2009.398 ◽

2009 ◽

Author(s):

Zhiwei Chen ◽

Xiaojun Wang

Keyword(s):

Wastewater Treatment ◽

Pilot Plant ◽

Food Additives ◽

High Concentration ◽

Pilot Plant Study

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Application of immersed-type membrane separation activated sludge process to municipal wastewater treatment

Water Science & Technology ◽

10.2166/wst.2000.0665 ◽

2000 ◽

Vol 41 (10-11) ◽

pp. 295-301 ◽

Cited By ~ 8

Author(s):

T. Murakami ◽

J. Usui ◽

K. Takamura ◽

T. Yoshikawa

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Phosphorus Removal ◽

Pilot Plant ◽

Municipal Wastewater ◽

Membrane Separation ◽

Small Scale ◽

Municipal Wastewater Treatment ◽

Production Ratio ◽

Significant Difference

Pilot plant studies were carried out using actual wastewater to investigate the applicability of a membrane separation activated sludge (MSAS) process to municipal wastewater treatment. A small-scale pilot plant (6.7 m3/day) with immersed flat sheet membrane was operated at the flux of 0.4 m3/m2/day. Continuous operation for 140 days without chemical cleaning was possible. Average Sludge production ratio was about 0.6. No significant difference was observed in the dewaterability between membrane separation activated sludge and conventional activated sludge at the CST test. Large-scale pilot plants (30–70 m3/day) with five types of membrane were also operated. In these plants nitrogen removal by nitrification and denitrification, and phosphorus removal by coagulant addition were carried out. Stable operation with HRT of six hours, flux of 0.4–0.8 m3/m2/day was possible, the average nitrogen and phosphorus removal efficiency being more than 80 and 95%, respectively.

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Nitrogen removal from wastewater in a pilot plant operated in the recirculation anoxic-oxic activated sludge mode

Water Science & Technology ◽

10.2166/wst.1996.0344 ◽

1996 ◽

Vol 33 (12) ◽

pp. 255-258 ◽

Cited By ~ 1

Author(s):

Olga Burica ◽

Marjeta Strazar ◽

Ivan Mahne

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Wastewater Treatment Plant ◽

Pilot Plant ◽

Municipal Wastewater ◽

Treatment Plant ◽

Volume Ratio ◽

Mineral Nitrogen ◽

Operating Conditions ◽

Effluent Quality

The recirculation activated sludge process with preanoxic treatment was applied for biological reduction of the nitrogen content in municipal wastewater at pilot plant level. The pilot plant of total volume 3 300 1 with an initial anoxic to aerobic volume ratio of 40 : 60 was fed with wastewater from the first heavily loaded aerobic stage of a local wastewater treatment plant. Experiments were run over the summer and winter periods, the influent wastewater temperature being approx 24°C and approx 10°C, respectively. Special attention was paid to the hydraulic retention time, the total as well as mineral nitrogen loading, the aerobic to anaerobic volume ratio, and to the energy demand for denitrification of oxidised mineral nitrogen forms. Under optimal operating conditions the effluent quality that could be achieved was about 10 mg/l of total nitrogen (74% removal) and less than 2 mg N/l mineral nitrogen (87% removal), while simultaneously 205 mg BOD5/l in the influent was reduced to less than 7mg O2/l in the effluent. It was found feasible from the pilot plant experiments to upgrade an existing two stage aerobic-anaerobic wastewater treatment plant to reduce nitrogen from the liquid fraction of municipal wastewater so as to meet effluent quality standards without much additional volume and without amending the energy source for bioconversion of oxidised mineral nitrogen to gaseous forms.

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The use of the kaldnes suspended carrier process in treatment of wastewaters from the forest industry

Water Science & Technology ◽

10.2166/wst.1997.0498 ◽

1997 ◽

Vol 35 (2-3) ◽

pp. 123-130 ◽

Cited By ~ 7

Author(s):

Eva Dalentoft ◽

Peter Thulin

Keyword(s):

Activated Sludge ◽

Pilot Plant ◽

Operating Costs ◽

Forest Industry ◽

Activated Sludge Process ◽

Combination Process ◽

In Series ◽

Suspended Carrier ◽

Highly Loaded ◽

Pilot Plant Study

One pilot plant study and two full scale studies have been carried out seeking for the optimal use of the Kaldnes suspended carrier process in treatment of wastewaters from the forest industry. The wastewater used in all three cases came from secondary fiber mills. The studies show that the Kaldnes process as a highly loaded stage (typically 15-25 kg COD/m3·d) in series with an activated sludge stage forms an efficient, stable and competitive combination process both regarding investment and operating costs. This is especially true when treating wastewaters with a composition that makes them unsuited for treatment in an activated sludge process. The flexibility and compactness of the Kaldnes suspended carrier process also makes it an ideal choice for upgrading of existing treatment plants.

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