Aerobic treatment of dairy wastewater in an industrial three-reactor plant: Effect of aeration regime on performances and on protozoan and bacterial communities

Tocchi, Carlo; Federici, Ermanno; Fidati, Laura; Manzi, Rodolfo; Vincigurerra, Vittorio; Petruccioli, Maurizio

doi:10.1016/j.watres.2012.03.032

Cited by 71 publications

(29 citation statements)

References 35 publications

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“…Recently, many different technologies have been utilized for removal of hazardous pollutants from water and wastewater, including biochemical methods [3], membrane separation [4], ion-echange [5], ultrafiltration [6], photocatalysis [7], coagulation/flocculation [8], and adsorption [9]. Among the mentioned methods, adsorption has some advantage when compared aforementioned conventional methods in terms the simplicity of utilization, effectiveness, low cost, no sludge formation, etc.…”

Section: Introductionmentioning

confidence: 99%

“…3 (0.787%), and LOI (''loss on ignition" 7.12%)) The total mass (SiO 2 +Al 2 O 3 = 82.7%) indicated the Jorf Lasfar fly ash was Class F. X-ray diffraction (XRD) analysis was carried out using (Xpert Pro model) diffractometer equipped with a source operating Cu-Kα (1.54060 Å). Nitrogen adsorption/desorption isotherms were recorded for powdered samples using a Micrometrics model 3Flex 3500 analyzer.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

et al. 2018

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Abstract. Cationic dye adsorption from aqueous solution onto synthesized geopolymer was investigated by batch and fixed bed column experiments. The geopolymer material was elaborated by alkali solution and fly ash supplied by Jorf Lasfar power plant of Morocco. Physical and chemical characteristics of samples were determined by FX, DRX, SEM, 29 Si MAS NMR and Zeta potential methods. The Brunauer, Emmett and Teller (BET) technique is used to determine the surface area. The Barrett-Joyner-Halenda (BJH) method was performed to obtain pore size distribution curves and average pore diameter. Kinetics data were analyzed using pseudo-first-order, pseudo-second-order and intraparticle diffusion models. To predict the breakthrough curves and determine the main fixed bed column parameters, three kinetic models; Tomas, Bohart-Adams and YoonNelson models are applied to fitting the experimental data. The kinetic study showed that the pseudo-secondorder can be used to describe the methylene blue (MB) adsorption process on the geopolymer matrix. The kinetic models of the adsorption in dynamic column are suitable to describe the continuous adsorption process of dyestuff by the geopolymer. The results of this study indicated that geopolymer derived from fly ash can be used as a low cost effective adsorbent for cationic dye removal from industrial aqueous effluent.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

et al. 2018

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“…In this study, flowback water was added to treated wastewater for only 9 weeks. Over a longer period of time, such a decrease in protozoa biodiversity may lead to deterioration in the efficiency of wastewater treatment as high biodiversity among the protozoan population is fundamental for reaching high plant performance [28].…”

Section: Microfauna Communitymentioning

confidence: 99%

Impact of Flowback Water on Activated Sludge Biocenosis During Municipal Wastewater Treatment

Ziembińska-Buczyńska

Drzewicki

Kulikowska

2015

Ecological Chemistry and Engineering S

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Abstract:The aim of this study was to determine the effect of flowback water on an activated sludge biocenosis during municipal wastewater treatment in the sequencing batch reactors (SBRs). Two series were performed. In series 1, only municipal wastewater was treated, whereas in series 2, municipal wastewater with pre-treated flowback water was used. Flowback water constituted 3-5% of the influent and was introduced to the SBRs twice per week. Introducing flowback water did not decrease the quality of effluent from the SBRs. However, the composition of the activated sludge biocenosis differed between series, ie the biodiversity of protozoa and the relative abundance of microfauna in functional groups changed after flowback water addition. Polymerase chain reaction -denaturing gradient gel electrophoresis (PCR-DGGE) showed that the ammonia oxidizers community responded faster to flowback water addition than the total bacterial community and remained relatively stable during treatment. However, after 9 weeks of exposure to flowback water, ammonia oxidizing bacteria (AOB) biodiversity decreased. This suggests that prolonged exposure could cause nitrification problems, leading to deterioration in effluent quality.

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“…In fact, this efficiency is closely related to the composition of the sludge, namely the bacterial, protozoan and metazoan population (Juliastuti et al, 2003). For instance, some bacterial families are responsible for the nitrification process and their absence in the sludge would result in ammonium accumulation (Bassin et al, 2012); furthermore, protozoa are considered to be important bioindicators for the activated sludge, as their population has been associated with operational parameters (Tocchi et al, 2012). As the protozoa sizes are some orders of magnitude larger than bacteria, they can be identified and quantified by optical microscopy; hence, they have been used as a fast and convenient way to define the biological quality of the sludge ( e.g.…”

Section: Introductionmentioning

confidence: 99%

Effect of Methylisothiazolinone on Biological Treatment: Efficiency of SBRs and Bioindicative Studies

Amat

Arqués

López-PérezM.F.

et al. 2015

Environmental Engineering Science

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Aerobic treatment of dairy wastewater in an industrial three-reactor plant: Effect of aeration regime on performances and on protozoan and bacterial communities

Cited by 71 publications

References 35 publications

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

Adsorption of cationic dye onto fly ash-based geopolymer: Batch and fixed bed column studies

Impact of Flowback Water on Activated Sludge Biocenosis During Municipal Wastewater Treatment

Effect of Methylisothiazolinone on Biological Treatment: Efficiency of SBRs and Bioindicative Studies

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