Effect of ferric and ferrous iron addition on phosphorus removal and fouling in submerged membrane bioreactors

Zhang, Zhenghua; Wang, Yuan; Leslie, Greg; Waite, T. David

doi:10.1016/j.watres.2014.11.011

Cited by 116 publications

(74 citation statements)

References 43 publications

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“…Although this reduction was half what could be achieved, it could be much worse with a low Fe/P ratio -even below 10% [34][35]. The low DO level (Table 2) could be another factor that affects the low reduction in laboratory studies [34][35][36]. The efficiency measured during the field experiment was found to be similar (49%) to the lab results for 5% FeCl 3 (Table 3), despite the use of a higher FeCl 3 concentration.…”

Section: Discussionmentioning

confidence: 58%

“…The best 43% PO 4 3-reduction was noted for the deposit with 5% FeCl 3 . Although this reduction was half what could be achieved, it could be much worse with a low Fe/P ratio -even below 10% [34][35]. The low DO level (Table 2) could be another factor that affects the low reduction in laboratory studies [34][35][36].…”

Section: Discussionmentioning

confidence: 93%

“…The efficiency measured during the field experiment was found to be similar (49%) to the lab results for 5% FeCl 3 (Table 3), despite the use of a higher FeCl 3 concentration. This might be due to the higher variability of parameters, such as pH, DO, and temperature, affecting phosphate absorption by iron ions [34][35] in the field experiment (Table 2). Aluminum sulphate was the last compound to be mixed with deposit material.…”

Section: Discussionmentioning

confidence: 98%

“…The removal efficiency of phosphates provided by Fe, Ca, and Al depends mainly on the physical parameters (pH, DO, and temperature) and also the Fe/P, Ca/P, or Al/P ratios [30,[34][35]37]. The ratio of the mentioned ions to phosphorus could be easily changed and controlled in streams and drainage ditches by applying tested deposits.…”

Section: Discussionmentioning

confidence: 99%

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Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Bednarek¹,

Szklarek²,

Dziedziczak³

et al. 2016

Pol. J. Environ. Stud.

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The development of civilization and its accompanying anthropopressure have increased the accumulation of biogenic elements in aquatic ecosystems, which has accelerated the eutrophication of water bodies all over the world [1][2][3], and by doing so increased the production of tides of toxic cyanobacteria [4][5]. There is, therefore, a need to integrate ecohydrology with engineering solutions on the catchment scale to slow the rate of eutrophication [6], with the potential to permanently decrease the content of bioavailable phosphorus in water supplies Pol. J. Environ. Stud. Vol. 25, No. 5 (2016), 1847-1855 AbstractThe greatest source of phosphorus pollution in the freshwater ecosystem is erosion from agricultural areas and point sources. Although this pollution is typically moderated by precipitation and sedimentation, biological and physicochemical methods can be used. The aim of our study was to construct an alternative prototype solution incorporating a filter bed made of suitable recycled phytogenic materials (hemp and harl flax) mixed with chemical compounds (Ca(OH) 2 , FeCl 3 , and Al 2 (SO 4 ) 3 ) based on the results of laboratory and field experiments. An 80-90% reduction was noted for deposits with Ca(OH) 2 and Al 2 (SO 4 ) 3 compounds, and 42% for FeCl 3 during laboratory studies. The field studies did not provide such a high reduction of phosphates -only 2% for the Ca(OH) 2 deposit and 49% for the FeCl 3 deposit. This could be attributed to variable physical parameters (pH, temperature and dissolved oxygen) and high negative correlation (r = -0.6296; p = 0.003) with nitrate reduction for the Ca(OH) 2 deposit. However, greater reduction was noted when the phosphate concentration exceeded 1 mg PO 4 3-L -1 in field experiments.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Bednarek¹,

Szklarek²,

Dziedziczak³

et al. 2016

Pol. J. Environ. Stud.

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“…The appropriate dosing of coagulants into MBR systems has been reported to assist greatly the reduction of fouling, due to the reduction of organics in the supernatant liquor, or to the formation of larger flocs, which may limit the blockage of membranes pores (Zhang et al 2015). In literature, a wide variety of coagulant dosages have been identified as optimal in terms of membrane fouling mitigation and nutrient removal, ranging from few mg/L or even some dozens of mg/L (Ma et al 2014;Shon et al 2005), but also up to 500 mg/L (Song et al 2008).…”

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confidence: 99%

Wastewater Treatment in Membrane Bioreactors: The Use of Polyelectrolytes to Control Membrane Fouling

et al. 2016

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The present study investigates the addition of several commercially available cationic (FO 4000 SSH and ADIFLOC series) and anionic (LT-25 Magnafloc) polyelectrolytes in a fully automated, pilot-scale Membrane Bioreactor (MBR), aiming to the development of an integrated methodology for the control of membrane fouling in MBR treatment systems. For this purpose, a series of batch experiments were conducted in order to evaluate their effectiveness on membrane fouling mitigation, using a typical hollow fiber, commercially available microfiltration membrane. Reversible fouling was assessed in terms of sludge filterability tests, whereas irreversible fouling was assessed in terms of SMPs (Soluble Microbial Products) concentration measurements. Results showed that the addition of cationic polyelectrolytes FO 4000 SSH series and ADIFLOC series were found capable to reduce both reversible and irreversible fouling. More specifically, the FO 4350 SSH type exhibited a remarkable performance, regarding both sludge filterability enhancement and SMP removal, when added at the concentration of 10 mg/L. Further comparison with the anionic polyelectrolyte LT-25 Magnafloc reinforced the allegation that cationic polyelectrolytes are preferable for control of membrane fouling, mainly due to charge neutralization mechanism.

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Recovery of Phosphorus from Wastewater and Sludge

Lin

2021

Sustainable Resource Management, Volume I

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Effect of ferric and ferrous iron addition on phosphorus removal and fouling in submerged membrane bioreactors

Cited by 116 publications

References 43 publications

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Using Chemically Treated Organic Recycling Materials to Enhance Freshwater Purification

Wastewater Treatment in Membrane Bioreactors: The Use of Polyelectrolytes to Control Membrane Fouling

Recovery of Phosphorus from Wastewater and Sludge

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