Research on characteristics of aerobic granules treating petrochemical wastewater by acclimation and co-metabolism methods

Zhang, Hanmin; He, Y.-X.; Jiang, Tao; Yang, Fenglin

doi:10.1016/j.desal.2011.05.060

Cited by 54 publications

(19 citation statements)

References 22 publications

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“…It would appear that polysaccharides favour the formation of isolate bio-aggregates, while the proteins determine the granulation of sludge. As reported by Zhang et al (2011) the increasing of the PN:PS ratio was accompanied by the formation of aerobic granules.…”

Section: Physical Characteristics Of Aerobic Granulesmentioning

confidence: 50%

“…), make conventional biological systems unsuitable for their treatment. In literature there are several studies about the treatment of saline wastewater using granular sludge Pronk et al, 2014), while few are relating to the treatment of wastewater contaminated with hydrocarbons (Zhang et al, 2011). However, no experiences on granulation process both with saline and oily wastewater have been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Taheri et al (2012) obtained aerobic mature granules after 70 days treating saline wastewater. Zhang et al (2011) obtained granular sludge after 140 days treating petrochemical wastewater, while Abdullah et al (2013) after 60 days treating agro-based wastewater. Hence, it is clear that the start-up of an aerobic granular sludge reactor is strongly influenced by the nature of the wastewater, since the presence of certain substances could promote the granulation process.…”

Section: Introductionmentioning

confidence: 99%

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Cultivation of granular sludge with hypersaline oily wastewater

Corsino

Campo

Bella

et al. 2015

International Biodeterioration & Biodegradation

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a b s t r a c tThe time required to stabilise mature aerobic granules is rather variable. In addition, cultivation time and the structural characteristics of granules seem to be related to the nature of wastewater influent. Granular sludge has been used for the treatment of several industrial wastewaters, but nothing has been reported about wastewater characterized by the simultaneous presence of hydrocarbons and high chloride concentration. In this work, the authors analysed the granulation process and performance as well as the physical characteristics of aerobic granules in two Granular Sequencing Batch Airlift Reactors (GSBARs), fed with acetate-based synthetic wastewater in reactor 1 (R1) and with a mixture of real and simulated slop (R2). The results obtained in 100 days show that full granulation was achieved in both reactors. The granules in R2 developed more quickly, but they appeared slightly unstable and more susceptible to breaking. Despite high salt concentration, the efficiency of phosphorous and carbon removal was satisfactory. Low nitrification activity was observed in R1, confirming that a longer time is necessary to obtain the acclimation of autotrophic biomass in aerobic granules. In R2 the combined effect of salinity and hydrocarbons caused the inhibition of the autotrophic biomass, with the consequence that nitrification was absent. Hydrocarbons were initially removed by adsorption afterwards by biological degradation with a removal efficiency of over 90%.

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Section: Physical Characteristics Of Aerobic Granulesmentioning

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cultivation of granular sludge with hypersaline oily wastewater

Corsino

Campo

Bella

et al. 2015

International Biodeterioration & Biodegradation

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“…Their efficacy decreases as the concentration of pollutant increases. Furthermore, some organic compounds are resistant to biological cleanup (Zhang et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Electrocoagulation Treatment Technique for the Separation of Oil from Wastewater

Fadali¹,

Ebrahiem²,

Gamil³

et al. 2015

J. of Environmental Science and Technology

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Oily wastewater represents a dangerous threat when discharged to receiving bodies. This research investigates electrocoagulation as a simple, effective and economic technique for treatment of such wastewater. Bench scale reactors were used to evaluate the factors that may affect the treatment of a wastewater obtained from Kuwait Gulf Oil Company. Aluminum was used as a sacrificial anode. Electrodes were arranged at different configurations (horizontal, vertical and vertical anode with horizontal cathode) to select the optimal one. Other tested operation parameters include time of treatment, current density, the distance between the electrodes, anode tubes diameters and the electrolyte concentration of the emulsion. The treatment efficiency was evaluated by comparing the initial and final turbidity of the treated wastewater. Experimental results indicate that the efficiency of oil separation increased with the increase of the treatment time, current density, anode diameter and concentration of electrolyte. However, it decreased with the increase of distance between electrodes. The horizontal arrangement gave the best results. The data shows that oil separation increases slightly with increasing temperature. The optimum time and current density for oil separation was determined as 30 min and 30 mA cmG 2 , respectively. These parameters reduced the turbidity of the wastewater from 95-5 NTU.

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“…For these unique properties, aerobic granular sludge has attracted increasing interest for industrial wastewater treatment (Zhang et al, 2011;Abdullah et al, 2013). Among these, aerobic granular sludge reactors have been successfully used for treating synthetic saline wastewater.…”

mentioning

confidence: 99%