Aerobic granular sludge to treat paper mill effluent: selection of ideal strains that contribute to the formation of strong aggregates

Morais, Ismarley Lage Horta; Silva, Cláudio; Nascimento, Antônio Galvão do; Filho, Natalino Perovano; Dias, João Carlos Teixeira

doi:10.1080/19443994.2016.1192490

Cited by 3 publications

(8 citation statements)

References 17 publications

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“…Papel Celulose Nipo-Brasileira S / A (CENIBRA®). One of the reactors (R1) was maintained under typical process conditions with activated sludge to form flocculent sludge, and the other two reactors (R2 and R3) were operated with parameters that favored the formation of aerobic granular sludge [10]. Initially all reactors were maintained at 35 ° C under aeration in order to maintain the dissolved oxygen content (OD) above 2.00 mg.L-1, with reaction cycles of 12 hours, where each cycle 300 ML of treated effluent was withdrawn and 300 mL of new effluent were added.…”

Section: IImentioning

confidence: 99%

“…In the reactor operated for the formation of flocculent sludge (R1), this time was maintained until the end of the experiment. For the reactors operated for the formation of aerobic granular sludge (R2 and R3) the time was decreased, every three days, to 30, 20, 10, 5, 3, 2 and 1 minute (s), the latter being the time indicated for the formation and maintenance of aerobic granular sludge [10]. After the formation of the granules the time of 1 minute for decantation was maintained until the end of the experiment.…”

Section: IImentioning

confidence: 99%

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Treatment of Effluent of the Cellulose and Paper Industry Using Aerobic Granular Sludge Thermophilic

Filho¹,

Dias²,

Silva³

et al. 2019

IJAERS

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Large amounts of effluents are generated in pulp and paper mills. In general, these effluents present temperatures above 40 ºC, which may preclude biological treatment in mesophilic conditions (35 ºC). For this, the present work aimed to produce aerobic granules in mesophilic conditions and, after their stability, leads them to thermophilic conditions. After the thermophilic granules were obtained, analyzes of their maintenance, treatment efficiency and verification of the production of the extracellular polymeric substances (carbohydrates, proteins and humic acids), present in the granules under these conditions were carried out. It was observed that the granules, generated from the biological sludge and the effluent of a pulp and paper industry, can act up to a temperature of 45 ºC, presenting a removal rate of around 70%, without great loss of efficiency of the proposed treatment compared to that of mesophilic flocculent sludge.

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Section: IImentioning

confidence: 99%

Section: IImentioning

confidence: 99%

Treatment of Effluent of the Cellulose and Paper Industry Using Aerobic Granular Sludge Thermophilic

Filho¹,

Dias²,

Silva³

et al. 2019

IJAERS

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“…The mesophilic aerobic granules were obtained in a sequential batch reactor (SBR), fed with recycled paper mill effluent (Morais et al 2016b).…”

Section: Bacterial Isolates From Mesophilic Granulesmentioning

confidence: 99%

“…The importance of each isolate in the granule formation process and its ability to coaggregate with the others was evaluated in a prior study (Morais et al 2016b).…”

Section: Coaggregation Assaymentioning

confidence: 99%

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Production of extracellular polymeric substances by isolate consortia obtained from mesophilic aerobic granules from the treatment of paper mill effluent

Filho

Morais

Silva

et al. 2019

BioRes

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Aerobic granules are large, compact microbial aggregates when compared to flocculent sludge, and they can be used in wastewater treatment. The application of aerobic granular sludge in bioreactors for the treatment of industrial effluents is still considered innovative and has been the subject of several recent studies. In the present study, 19 microbial isolates from mesophilic aerobic granules, obtained from a previous study, were evaluated in co-aggregation tests. The extracellular polymeric substances (EPS) produced, such as carbohydrates, proteins, and humic acids, were determined. The aim was to evaluate the relationship between the amount of EPS produced and the contribution of each isolate in the granulation process. The results of EPS production were used to analyze the polysaccharide / protein (PS / PN) ratio. The consortia with an absence of isolates 4, 8, 11, 14, 19, and 25 presented a PS / PN ratio <0.5. These isolates, identified as belonging to the genera Staphylococcus, Agrobacterium, Enterobacter, and Rhodococcus, were considered effective for the production and stability of the mesophilic aerobic granules.

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Characterization of aerobic granular sludge of different sizes for nitrogen and phosphorus removal

Zhu

Zhang

et al. 2018

Environmental Technology

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Granular size plays a key role in the performance of the aerobic granular sludge (AGS). As the diameter of the granule increases, stratification may begin to appear due to the increase in mass transfer resistance. Aerobic granules harvested from a lab-scale anaerobic-aerobic sequencing batch reactor (AO-SBR) were classified into three categories according to their size: (a) 0.15-0.28 mm, (b) 0.28-0.45 mm and (c) larger than 0.45 mm. In this study, the categories were called small-size, medium-size and large-size granules, respectively. A fraction of the different forms of phosphate and denitrification efficiency was investigated in each category. Results show that small-size granules present much more easily mobile phosphorus than other granules. Moreover, the denitrification performance has been tested by using dumping and trickling patterns for COD and [Formula: see text] feeding. The results demonstrated that the large-size granules exhibit poor denitrification rates, as opposed to the medium-size granules. Therefore, medium-size granules, with a size of 0.28-0.45 mm, are regarded as the most suitable granular size for AGS in this experiment from the perspective of denitrification and phosphorus removal.

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Aerobic granular sludge to treat paper mill effluent: selection of ideal strains that contribute to the formation of strong aggregates

Cited by 3 publications

References 17 publications

Treatment of Effluent of the Cellulose and Paper Industry Using Aerobic Granular Sludge Thermophilic

Treatment of Effluent of the Cellulose and Paper Industry Using Aerobic Granular Sludge Thermophilic

Production of extracellular polymeric substances by isolate consortia obtained from mesophilic aerobic granules from the treatment of paper mill effluent

Characterization of aerobic granular sludge of different sizes for nitrogen and phosphorus removal

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