Enhanced Biological Phosphorus Removal at low Sludge Retention Time in view of its integration in A-stage systems

Chan, Carlos; Guisasola, Albert; Baeza, Juán Antonio

doi:10.1016/j.watres.2017.04.010

Cited by 42 publications

(10 citation statements)

References 24 publications

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“…Various methods for removal of phosphate from wastewater have been explored, including biological method, chemical precipitation, electrochemical process, coagulation, membrane separation, and adsorption [7][8][9][10][11]. Biological phosphate uptake often fluctuates with operating and growth conditions [4] while chemical precipitation and coagulation are hindered by their high chem-ical consumption, low recovery efficiency, and excessive production of chemical sludge [5].…”

Section: Introductionmentioning

confidence: 99%

“…Biological phosphate uptake often fluctuates with operating and growth conditions [4] while chemical precipitation and coagulation are hindered by their high chem-ical consumption, low recovery efficiency, and excessive production of chemical sludge [5]. Electrochemical process is restricted by limited capacity for wastewater treatment containing multiple anionic compounds and the need to replace electrodes frequently [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of phosphate in water on a novel calcium hydroxide-coated dairy manure-derived biochar

Choi¹,

Jang²,

Kan³

et al. 2018

Environmental Engineering Research

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The present study investigated a novel calcium hydroxide-coated dairy manure-derived biochar (Ca-BC) for adsorption of phosphate from water and dairy wastewater. The Ca-BC showed much higher adsorption of phosphate than that of dairy manure-derived biochar. The Ca-BC possessed mainly the calcium hydroxide and various functional groups resulting in high reactivity between phosphate and calcium hydroxide in the Ca-BC. The adsorption of phosphate onto Ca-BC followed pseudo-second order kinetic and Freundlich isotherm models indicating chemisorptive interaction occurred on energetically heterogeneous surface of Ca-BC. The maximum adsorption capacity of the Ca-BC was higher than those of iron oxide and zinc oxide-coated biochars, but lower than those of CaO-and MgO-coated biochars. However, the Ca-BC showed high reactivity per surface area for adsorption of phosphate indicating importance of surface functionalization of biochar. On the other hand, the adsorption of phosphate in dairy wastewater on Ca-BC was lower than that in water owing to competition between other anions in wastewater and phosphate. Overall, the Ca-BC would be a low cost and effective adsorbent for recovery of phosphate from water and wastewater.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of phosphate in water on a novel calcium hydroxide-coated dairy manure-derived biochar

Choi¹,

Jang²,

Kan³

et al. 2018

Environmental Engineering Research

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“…The removal of phosphorus biologically from waste streams is achieved by introducing waste streams into an anaerobic environment in which phosphorus is released followed by an aerobic environment in which phosphorus is taken up by polyphosphate-accumulating organisms (PAOs) [22][23][24]. Ge et al [25] investigated the performance of a SBR for phosphorus removal in abattoir wastewater.…”

Section: Introductionmentioning

confidence: 99%

Sequencing Batch Reactor Performance Evaluation on Orthophosphates and COD Removal from Brewery Wastewater

et al. 2022

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The discharge of industrial effluent constituting high orthophosphates and organic pollutants in water receiving bodies compromises freshwater quality and perpetuates eutrophication. In this study, an anaerobic–aerobic sequencing batch reactor (SBR) under activated sludge was investigated for orthophosphates and chemical oxygen demand (COD) removal from brewery wastewater. Raw brewery wastewater samples were collected on a daily basis for a period of 4 weeks. The findings of the study are reported based on overall removal efficiencies recording 69% for orthophosphates and 54% for total COD for a sludge retention time (SRT) of 7 days and hydraulic retention time of 18 h at mesophilic temperature conditions of ±25 °C. Moreover, the SBR system showed stability on orthophosphate removal at a SRT ranging from 3 to 7 days with a variation in organic volumetric loading rate ranging from 1.14 to 4.83 kg COD/m3.day. The anaerobic reaction period was experimentally found to be 4 h with the aerobic phase lasting for 14 h. The SBR system demonstrated feasibility on orthophosphates and COD removal with variation in organic loading rate.

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“…The concentration of total phosphorus decreases only by 5-7% due to the sorption processes realized in the primary tank. All major modifications of phosphorus compounds are carried out in aeration tanks [5][6]. In the process of traditional biological treatment, there is a whole chain of physical, chemical and biological transformations takes place.…”

Section: Introductionmentioning

confidence: 99%

Special features of elimination of phosphorus compounds in aeration tanks

Zaletova

2020

E3S Web Conf.

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In the sewage treatment plants, phosphorus compounds presented constantly, due to the sources of their appearance. In urban wastewater, phosphorus stays in various compounds – dissolved, insoluble, organic, mineral, simple and complex forms. Only phosphates and total phosphorus are monitored in wastewater chemicals laboratories. The data on phosphorus compounds containing in the wastewater of a number of cities is analyzed in the study. The impact of the biological wastewater treatment process on the efficiency of phosphorus removal was assessed. The research was carried out on an experimental technological installation. It is shown that in the original wastewater not only the concentration of total phosphorus and phosphates is constantly varying, but also their ratio. In the process of biological treatment, a number of complex biochemical and physical-chemical processes are parallel: assimilation, hydrolysis, and adsorption. The effectiveness of these processes is influenced by the magnitude of the initial concentration of total phosphorus and the amount of active dose of sludge. It has been recognized that the increased efficiency of the removal of total phosphorus has an effect on both the increase in the active dose of sludge and the size of the initial concentration of total phosphorus. However, the residual concentration of total phosphorus is affected by its original content, while the initial content of the total phosphorus is affected insignificantly.

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Enhanced Biological Phosphorus Removal at low Sludge Retention Time in view of its integration in A-stage systems

Cited by 42 publications

References 24 publications

Adsorption of phosphate in water on a novel calcium hydroxide-coated dairy manure-derived biochar

Adsorption of phosphate in water on a novel calcium hydroxide-coated dairy manure-derived biochar

Sequencing Batch Reactor Performance Evaluation on Orthophosphates and COD Removal from Brewery Wastewater

Special features of elimination of phosphorus compounds in aeration tanks

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