Textile wastewater treatment: Aerobic granular sludge vs activated sludge systems

Lotito, Adriana Maria; Sanctis, Marco De; Iaconi, Claudio Di; Bergna, Giovanni

doi:10.1016/j.watres.2014.01.055

Cited by 98 publications

(23 citation statements)

References 17 publications

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“…Nowadays, biological [6,7,8] and physical-chemical processes [9,10,11] are used to remove dyes from textile wastewater. Biological processes show high efficiency in organic matter removal (about 90%) [12], but low dye degradation due to the poor biodegradability of dyes.…”

Section: Introductionmentioning

confidence: 99%

Reuse of Textile Dyeing Effluents Treated with Coupled Nanofiltration and Electrochemical Processes

et al. 2016

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The reactive dye Cibacron Yellow S-3R was selected to evaluate the feasibility of combining nanofiltration membranes with electrochemical processes to treat textile wastewater. Synthetic dyeing effluents were treated by means of two nanofiltration membranes, Hydracore10 and Hydracore50. Up to 98% of dye removal was achieved. The influence of salt concentration and pH on membrane treatment was studied. The best dye removal yield was achieved at pH 3 in the presence of 60 g/L of NaCl. After the membrane filtration, the concentrate containing high dye concentration was treated by means of an electrochemical process at three different current densities: 33, 83, and 166 mA/cm2. Results showed a lineal relationship between treatment time and applied current density. Both permeates and electrochemically-decoloured effluents were reused in new dyeing processes (100% of permeate and 70% of decoloured concentrates). Dyed fabrics were evaluated with respect to original dyeing. Colour differences were found to be into the acceptance range.

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Section: Introductionmentioning

confidence: 99%

Reuse of Textile Dyeing Effluents Treated with Coupled Nanofiltration and Electrochemical Processes

et al. 2016

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“…In addition, aerobic granular systems produce a suitable effluent with high hydraulic/organic loadings and low sludge production, compared with conventionally activated sludge processes . To date, limited studies have been conducted for aerobic granular sludge formation, which is helpful in the biodegradation of dye‐containing wastewater . The Kolekar research group developed aerobic granules in a sequencing batch reactor (SBR), which can efficiently degrade reactive blue 59 and its biotransformed products were non‐toxic .…”

Section: Introductionmentioning

confidence: 99%

Aerobic Granular Sludge for Dye Biodegradation in a Sequencing Batch Reactor With Anaerobic/Aerobic Cycles

Moghaddam

2016

CLEAN Soil Air Water

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This study investigated the formation of aerobic granular sludge with the main objective of Acid Red 18 (AR18) biodegradation in an altering anaerobic–aerobic sequencing batch reactor. According to the obtained results, the cultivated granules showed a stable structure in the treatment of synthetic wastewater containing 50 mg/L AR18, while no considerable variety in their characteristics and no granule break up were observed. As reported by many researchers, decolourization of AR18 is due to the anaerobic biodegradation of the azo bond; however, monitoring of the dye biodegradation through UV‐Vis spectroscopy showed that the contribution of the aerobic phase in dye removal was significant. This indicates the penetration of AR18 into the inner layers of granules and the ability of anaerobic microorganisms within the granules to degrade the dye through the consumption of tightly bound extracellular polymeric substances (EPS) as a carbon and energy source. The aerobic granules were not able to decompose anaerobically formed AR18 intermediates under aerobic conditions. The increase of the initial dye concentration from 50 to 100 mg/L caused the production of excess loosely bound EPS, which led to instability of the granules and hampered the dye removal efficiency.

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“…But there are problems which are inherent to an anaerobic/aerobic treatment sequence (such as the A 2 /O system) since the anaerobic transformation of toxic organic compounds is often incomplete [1][2][3][4] . The metabolites of anaerobic treatment may also be inhibitory to the methanogens themselves, resulting in declining anaerobic treatment efficiencies and adding to the load on the downstream aerobic treatment system [5][6][7][8][9][10][11] . Intimate contact of aerobes with anaerobes may reduce the accumulation of toxic intermediates as the aerobes would achieve an in situ removal of these anaerobic metabolites [12,13] .…”

Section: Introductionmentioning

confidence: 99%

Granulation for Coking Wastewater Treatment in a Coupled Anaerobic-Aerobic Reactor

Chen¹,

Bing-nan

2018

E3S Web Conf.

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Abstract：A coupled anaerobic-aerobic granular bio-film reactor was employed with two operation stages: StageⅠ, granular sludge was formed from digestion sludge using brewery wastewater, and Stage Ⅱ, granular sludge was acclimatized using coking wastewater. Two oxygenation methods (i.e. A and B) were employed to acclimatize the granules. For method A, dissolved O2 was supplied through a continuous oxygenation way of 800-15000mlmin -1 . And for method B, dissolved O2 was supplied of 800-15000mlmin -1 18-12 times at 20-60min intervals, 1h each time. The experimental results showed that granules could quickly form in 10d in the EGSB reactor seeded with digestion sludge and little loose granules lack of nutrition, and it was the key factor for granules forming to add little loose granules. It took only about 6 months for granules acclimation using coking wastewater. Both oxygenation methods could run well when acclimatizing the granules. However, method A could have comparatively high and stable operation effect. The actual coking wastewater had distinct inhibition effect on the granules, but the supplement of some oxygen could promote the recovery of SMA, and NaHCO3 supplement could also weaken the inhibition effect of the CWW. Method A had more strongly activity recovery ability than method B.

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Textile wastewater treatment: Aerobic granular sludge vs activated sludge systems

Cited by 98 publications

References 17 publications

Reuse of Textile Dyeing Effluents Treated with Coupled Nanofiltration and Electrochemical Processes

Reuse of Textile Dyeing Effluents Treated with Coupled Nanofiltration and Electrochemical Processes

Aerobic Granular Sludge for Dye Biodegradation in a Sequencing Batch Reactor With Anaerobic/Aerobic Cycles

Granulation for Coking Wastewater Treatment in a Coupled Anaerobic-Aerobic Reactor

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