Energy Efficient Aeration in a Single Low Pressure Hollow Sheet Membrane Filtration Module
© Vulkan-Verlag GmbH (9/2011)
The main drawback of membrane bioreactors (MBR) systems is the fouling of the membrane, which is decreased and/or prevented through gas sparging. However, this practice is based on rules of thumb or trialand- error approaches which are tedious, very time-consuming, do not necessarily provide optimal fouling control and they are not energy effi cient. Therefore, dedicated experiments are needed to fully understand the hydrodynamics of it. A hollow sheet (HS) MBR was studied. Experimental velocity measurements were made using micro-propellers and compared to CFD results. A good agreement between experimental measurements and CFD results was found (error less than 11 % on average). Due to the fact that the shear stress measurements were not performed, they were extracted from the CFD simulations, as the CFD simulation was validated against velocity data. The results of shear stress shows that the shear is homogeneously distributes over the predominant part of the membrane surface.
© Vulkan-Verlag GmbH (9/2011)
The main drawback of membrane bioreactors (MBR) systems is the fouling of the membrane, which is decreased and/or prevented through gas sparging. However, this practice is based on rules of thumb or trialand- error approaches which are tedious, very time-consuming, do not necessarily provide optimal fouling control and they are not energy effi cient. Therefore, dedicated experiments are needed to fully understand the hydrodynamics of it. A hollow sheet (HS) MBR was studied. Experimental velocity measurements were made using micro-propellers and compared to CFD results. A good agreement between experimental measurements and CFD results was found (error less than 11 % on average). Due to the fact that the shear stress measurements were not performed, they were extracted from the CFD simulations, as the CFD simulation was validated against velocity data. The results of shear stress shows that the shear is homogeneously distributes over the predominant part of the membrane surface.
Removal of Nitrate by Autosulfurotrophic Denitrifying Bacteria: Optimization, Kinetics and Thermodynamics Study
© PSP - Parlar Scientific Publications (12/2010)
In order to find an effective way to remove nitratenitrogen (NO3 −-N) in wastewater, the autosulfurotrophic denitrifying bacteria, which could oxidize elemental sulfur and reduce nitrate, was screened from facultative anaerobic sludge. The optimum conditions for denitrification were determined by studying pH, temperature and the initial sodium bicarbonate concentration.
© PSP - Parlar Scientific Publications (12/2010)
In order to find an effective way to remove nitratenitrogen (NO3 −-N) in wastewater, the autosulfurotrophic denitrifying bacteria, which could oxidize elemental sulfur and reduce nitrate, was screened from facultative anaerobic sludge. The optimum conditions for denitrification were determined by studying pH, temperature and the initial sodium bicarbonate concentration.
Batch and Fixed-Bed Adsorption of Actual Dyeing Wastewater on Sludge-Based Adsorbent from Pyrolusite-Catalyzed Pyrolysis
© PSP - Parlar Scientific Publications (12/2010)
The feasibility of application of activated carbon prepared from pyrolusite-augmented sewage sludge was investigated in batch and fixed-bed adsorption systems. An actual dyeing wastewater was chosen as the target pollutant. The results showed that the mineral supplement enhanced the properties of the activated carbon via catalyzing the formation of micro- and meso-pores during pyrolysis.
© PSP - Parlar Scientific Publications (12/2010)
The feasibility of application of activated carbon prepared from pyrolusite-augmented sewage sludge was investigated in batch and fixed-bed adsorption systems. An actual dyeing wastewater was chosen as the target pollutant. The results showed that the mineral supplement enhanced the properties of the activated carbon via catalyzing the formation of micro- and meso-pores during pyrolysis.
Removal of Algogenic Organic Matter by Miex® Pre-Treatment and its Effect on Fouling in Ultrafiltration
© PSP - Parlar Scientific Publications (12/2010)
Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of ultrafiltration (UF) in drinking water treatment. Algogenic organic matters (AOM), the main contributor to total NOM levels in raw waters characterised by elevated algae levels, is currently the subject of much investigation. In this study, the effect of AOM on fouling of ultrafiltration and the effectiveness of MIEX® pre-treatment for AOM removal and membrane fouling control was evaluated. The results showed that, the main species of algae in raw water were Chlorella vulgaris, which accounted for 80% of total algae. AOM was predominantly hydrophilic (50% or more) with a low SUVA (1.7Lm-1mg-1).
© PSP - Parlar Scientific Publications (12/2010)
Natural organic matter (NOM) fouling continues to be the major barrier to efficient application of ultrafiltration (UF) in drinking water treatment. Algogenic organic matters (AOM), the main contributor to total NOM levels in raw waters characterised by elevated algae levels, is currently the subject of much investigation. In this study, the effect of AOM on fouling of ultrafiltration and the effectiveness of MIEX® pre-treatment for AOM removal and membrane fouling control was evaluated. The results showed that, the main species of algae in raw water were Chlorella vulgaris, which accounted for 80% of total algae. AOM was predominantly hydrophilic (50% or more) with a low SUVA (1.7Lm-1mg-1).
Ozone Application as an Alternative Method to the Chemical Treatment Technique for Textile Wastewater
© PSP - Parlar Scientific Publications (12/2010)
In this study, chemical oxidation demand (COD) and color removal efficiencies of a textile industry were tested using chemical and ozone oxidation treatment techniques. The industry uses chemical processes to treat its wastewater, so it needs much time and operation cost. Herein, the applicability of ozone oxidation techniques was discussed as an alternative to the chemical treatment.
© PSP - Parlar Scientific Publications (12/2010)
In this study, chemical oxidation demand (COD) and color removal efficiencies of a textile industry were tested using chemical and ozone oxidation treatment techniques. The industry uses chemical processes to treat its wastewater, so it needs much time and operation cost. Herein, the applicability of ozone oxidation techniques was discussed as an alternative to the chemical treatment.
Petroleum Coke Fly Ash Use for Heavy Metals Removal from Acid Wastewaters
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2010)
This work is focused on the characterizationof a Chilean petroleum coke fly ash (PCFA) from circulated fluidized bed combustion (CFCB), and its potential use in Cu2+ and Pb2+ removal from acid wastewaters (pH 4). CFBC-PCFA presents a high Ca and SO3 content, being anhydrite the major crystalline mineral phase. Regarding to their environmental characterization, despite of its high Ni and V content, leaching tests allowed concluding that CFBC-PCFA is a non-hazardous residue. Heavy metals removal tests indicate that CFBC-PCFA is able to remove Cu2+ and Pb2+ mainly due to a precipitation process, at high liquid to solid ratios. According to these results, CFBC-PCFA may be used to remove heavy metals and neutralize acid wastewaters, suggesting a possible replacement of pure and costly alkaline materials.
© Lehrstuhl für Abfallverwertungstechnik und Abfallwirtschaft der Montanuniversität Leoben (11/2010)
This work is focused on the characterizationof a Chilean petroleum coke fly ash (PCFA) from circulated fluidized bed combustion (CFCB), and its potential use in Cu2+ and Pb2+ removal from acid wastewaters (pH 4). CFBC-PCFA presents a high Ca and SO3 content, being anhydrite the major crystalline mineral phase. Regarding to their environmental characterization, despite of its high Ni and V content, leaching tests allowed concluding that CFBC-PCFA is a non-hazardous residue. Heavy metals removal tests indicate that CFBC-PCFA is able to remove Cu2+ and Pb2+ mainly due to a precipitation process, at high liquid to solid ratios. According to these results, CFBC-PCFA may be used to remove heavy metals and neutralize acid wastewaters, suggesting a possible replacement of pure and costly alkaline materials.
Anaerobic UASB reactor as brewery waste water treatment plant
© NMC Ltd. (10/2010)
Anaerobní UASB reaktor v čištění pivovarských odpadních vod
© NMC Ltd. (10/2010)
Anaerobní UASB reaktor v čištění pivovarských odpadních vod
SUSAN - Sustainable and Safe Re-use of Municipal Sewage Sludge for Nutrient Recovery
© Vulkan-Verlag GmbH (8/2010)
Large scale considerations of the thermo-chemical heavy metal removal from sewage sludge for the safe recycle of Phosphorus
© Vulkan-Verlag GmbH (8/2010)
Large scale considerations of the thermo-chemical heavy metal removal from sewage sludge for the safe recycle of Phosphorus
Zemdrain® Formwork Liners in Wastewater Treatment Plants
© Vulkan-Verlag GmbH (8/2010)
Experts report on the performance of cast reinforced concrete surfaces after ten years of operation
© Vulkan-Verlag GmbH (8/2010)
Experts report on the performance of cast reinforced concrete surfaces after ten years of operation
Developing an Integrated Water Resources Management (IWRM) Concept for the Capital Brasília
© Vulkan-Verlag GmbH (8/2010)
IWAS-Áqua DF Brasília
© Vulkan-Verlag GmbH (8/2010)
IWAS-Áqua DF Brasília
