A research on advanced treatment of activated sludge-treated dye wastewater using active carbon biofilm method.

Conventional sand- and two-layer filtration is frequently put into action for the purpose of advanced wastewater treatment after low-loaded activated sludge systems. However, the effectiveness of this conventional filter concerning the biological content which is difficult to degrade (measured by COD) is extremely low - and the costs too high. In direct comparison, modifying the filters to a biologically intensified system, brings about a substantial increase in efficiency while costing very little more. The investigations of the authors for the optimization of the whole system, consisting of an activated sludge process and a biologically intensified filter, led to the fact that for the requirements of advanced treatment, the size of the activated sludge stage can be substantially reduced, without the effectiveness of the system as a whole being affected. In the field of normal requirements (national effluent standards) and comparable low influx concentrations, biologically intensified filtration can be combined with a high-loaded activated sludge process of SLR up to 5 kg BOD5/(kg MLSS.d). The area required for the construction of the system is under 50% compared to the conventional one-stage activated sludge system. At higher influx concentrations the simultaneous addition of precipitants/flocculants to the high-loaded activated sludge stage, leads to substantial improvement of the effluent of the whole system and simultaneously to a distinct phosphorus elimination. This process modification is greatly advantageous, especially for densely populated lake areas. The oxygen supply system of the filter has a key function in connection with the influent concentration and the loading of the biological stage.

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Decolorization and degradation of cationic red X-GRL by upflow blanket filter

Water Science & Technology ◽

10.2166/wst.2013.648 ◽

2013 ◽

Vol 67 (5) ◽

pp. 976-982 ◽

Cited By ~ 6

Author(s):

Bin Qiu ◽

Yan Dang ◽

Xiang Cheng ◽

Dezhi Sun

Keyword(s):

Bacterial Community ◽

Activated Sludge ◽

Denaturing Gradient Gel Electrophoresis ◽

Stable State ◽

Oxygen Demand ◽

Dye Wastewater ◽

Dominant Group ◽

Chain Reaction ◽

Gradient Gel Electrophoresis ◽

Polymerase Chain

An anaerobic upflow blanket filter (UBF) was employed for the treatment of dye wastewater containing cationic red X-GRL (X-GRL) in this study. The bacterial community in the UBF at its stable state was investigated by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE). The results showed that all color and the majority of chemical oxygen demand (COD) (92–74%) can be removed as the dye load increased from 33 to 134 g/(m3 d). The removal of color and COD were mostly attributed to the anaerobic activated sludge in the reactor. According to the DGGE fingerprints, the bacterial community in the biofilm was more diverse than that in the activated sludge. The bacterial diversity of the activated sludge and the bioflim both decreased with the dye load increasing. The dominant group was found to be phyla proteobacteria including β-proteobacteria, γ-proteobacteria, δ-proteobacteria and ɛ-proteobacteria, suggesting that these microbes might play an important role in X-GRL decolorization and degradation.

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Membrane filtration technology in water works. Development of membrane filtation system combined with advanced treatment (upflow dual-layer filtration system of manganese sand and granulated active carbon ).

Journal of Environmental Conservation Engineering ◽

10.5956/jriet.25.240 ◽

1996 ◽

Vol 25 (4) ◽

pp. 240-243

Author(s):

Yoshikazu ITOH

Keyword(s):

Active Carbon ◽

Membrane Filtration ◽

Advanced Treatment ◽

Filtration System ◽

Filtration Technology

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Examination of Advanced Treatment Technologies for Textile Dye Wastewater

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a1028.1291s419 ◽

2019 ◽

Vol 9 (1S4) ◽

pp. 596-603

Keyword(s):

Oxidation Process ◽

Organic Pollutant ◽

Fenton Oxidation ◽

Advanced Treatment ◽

Textile Dye ◽

Dye Wastewater ◽

Treatment Techniques ◽

Worldwide Population ◽

Fenton Oxidation Process ◽

Aeration Process

The worldwide population is developing and along these lines, the world may event incredible freshwater shortage. Our water assets are lacking and, thus, water management and reusing techniques are the main choices for receiving freshwater later on decades. Accordingly, there is an incredible requirement for the advancement of proper, reasonable and quick wastewater. The common plan of this investigation is based on assessment and comparison, of the chance of apply advanced treatment techniques (Aeration process and Fenton oxidation process) for the exclusion of residuals organic pollutant present in Dye wastewater. The various procedures, which influence the compound oxidation, for colors in their fluid arrangements are considered by utilizing Aeration and Fenton's responses. These Processes are Aeration and Fenton Oxidation Process- (Hydrogen peroxide dose). Finally, EC, COD, BOD, Turbidity, TDS, TSS, and Phosphate, when the oxidation procedure is determined to guarantee the flawless obliteration of natural colors during their expulsion from wastewater. The Compared optimum conditions were 6ml/l of Fenton (H2O2) demonstrate that Fenton's oxidation procedure effectively accomplished excellent evacuation capability.

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