Filterability and Floc size in Membrane Bioreactors: European Scale Assessment
© DIV Deutscher Industrieverlag GmbH (9/2011)
Filterability is a recognized parameter to evaluate membrane bioreactor (MBR) sludge quality. A link was established between fi lterability and submicron particles, i.e. sludge with worse fi lterability has a higher amount of submicron particles. In this research, the relation between fi lterability and suspended particles, measured through particle counting in the range 2–100 μm, was investigated to evaluate whether suspended material can be a source of submicron particles, causing the aforementioned fi lterability decrease. The research was performed at 4 pilot-scale MBRs, complementing previous research performed at 4 full-scale MBRs. Results showed that MBR activated sludge fi lterability improves with increasing sludge fl oc size, supporting the initial hypothesis. Nevertheless, in one single MBR installation varitions in the membrane tank floc size are likely to be limited.

Evaluation of Carbonaceous Organic Matter and Nitrogen Removal of Wastewater in Membrane Bioreactor
© DIV Deutscher Industrieverlag GmbH (9/2011)
This study aimed to evaluate the carbonaceous organic matter and nitrogen removal as well as the determination of critical fl ux in membrane bioreactor (MBR), with pre-anoxic zone, treating industrial wastewater of amino acids production. The reactor was operated under organic loading rate of 1.91 kg DQO/m3 · day and 0.18 kg NTK/m3 · day, the recirculation from aerobic reactor to anoxic reactor was 4 times the infl uent fl ow rate. The system showed an average removal of COD, TKN and TN of 97 %, 98 % and 92 %, respectively. The ultrafi ltration system was tested at various fl uxes between 25 and 37 L/m2·h, to determine the critical fl ux of 28 L/m2·h operating at 11.4 g/L of TSS and 35 days of sludge retention time. The results showed the technical feasibility of using MBR to remove organic matter from industrial wastewater of amino acids production.

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.

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.

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).

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.

Anaerobic UASB reactor as brewery waste water treatment plant
© 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
© DIV Deutscher Industrieverlag 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
© DIV Deutscher Industrieverlag 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
© DIV Deutscher Industrieverlag GmbH (8/2010)
IWAS-Áqua DF Brasília

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