Removing organic and nitrogen content from a highly saline municipal wastewater reverse osmosis concentrate by UV/H2O2–BAC treatment

Pradhan, Shovana; Fan, Linhua; Roddick, Felicity

doi:10.1016/j.chemosphere.2015.05.028

Cited by 47 publications

(10 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high nutrient uptake capacity of algal cells (Table 5) and stockpiling of nutrients in nutrient-replete conditions led to higher nutrient uptake and greater biomass productivity of the semi-continuous mode compared to batch mode. As a comparison, semi-continuous treatment could achieve comparable TN removal efficiency (> 50% within 48 h) with that reported in previous studies on ROC treatment using BAC (60%) (Pradhan et al 2015), UV/H 2 O 2 -BAC (60%), biological aerated filter (BAF) (65%) (Choi 2015) (Lu et al 2013), and BAF (67%) (Choi 2015). Furthermore, since the presence of ammonia and organic pollutants in ROC streams is of great concern due to their toxic nature (Smetana et al 2017), the high efficiency of NH 3 -N and DOC removal in short period cycles is another attractive benefit of the algal treatment.…”

Section: Discussionsupporting

confidence: 61%

Potential of Chlorella vulgaris and Nannochloropsis salina for nutrient and organic matter removal from municipal wastewater reverse osmosis concentrate

Mohseni

Kube

Fan

et al. 2020

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

Municipal wastewater reverse osmosis concentrate (ROC) poses health and environmental risks on its disposal as it contains nutrients and harmful organic compounds at elevated concentrations. This study compared a freshwater microalga Chlorella vulgaris and a marine microalga Nannochloropsis salina in suspended and alginate-immobilised cultures for batch and semicontinuous treatment of the ROC. The immobilised algae gave comparable nutrient removal rates to the suspended cells, demonstrating immobilisation had no apparent negative impact on the photosynthetic activity of microalgae. Semi-continuous algal treatment illustrated that the microalgae could remove significant amounts of nutrients (> 50% and > 80% for TN and TP, respectively), predominantly through algal uptake (> 90%), within a short period (48 h) and generate 335-360 mg DCW L-1 d-1 of algal biomass. The treatment also removed a significant amount of organic matter (12.7-13.3 mg DOC L-1 d-1), primarily (> 65%) through the biotic pathway.

show abstract

Section: Discussionsupporting

confidence: 61%

Potential of Chlorella vulgaris and Nannochloropsis salina for nutrient and organic matter removal from municipal wastewater reverse osmosis concentrate

Mohseni

Kube

Fan

et al. 2020

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…Increased demand for potable water, coupled with more stringent water quality regulations, has driven growth in the use of a suite of pressure‐driven liquid phase membrane separation, which produce high quality water while requiring less space than traditional treatment processes . The low pressure membranes, such as microfiltration (MF) and ultrafiltration (UF), are utilised in municipal/domestic and industrial wastewater treatment to remove colloids and suspended matter, while high pressure membranes, such as nanofiltration (NF) and reverse osmosis (RO), are now used extensively in the field of desalination (seawater and brackish) and water reclamation for the rejection of soluble or ionic species …”

Section: Introductionmentioning

confidence: 99%

Shear stress in a pressure-driven membrane system and its impact on membrane fouling from a hydrodynamic condition perspective: a review

Wang

Leslie

et al. 2016

J. Chem. Technol. Biotechnol

View full text Add to dashboard Cite

Pressure‐driven membrane technology has gained increasing popularity in municipal/domestic and industrial wastewater treatment, desalination, and water reclamation. Careful manipulation of surface shear stress, which plays a vital role in membrane fouling control from a purely hydrodynamic perspective, can minimise concentration polarisation of solute on flat sheet membranes, or enhance the particle back transport from hollow fibre membranes. This review considers the techniques to generate turbulence and shear at the membrane surface, the magnitude of shear stress, and the experimental, as well as numerical methods for evaluation of shear stress. The findings are presented in terms of the amount of shear stress reported to control membrane fouling in these systems. Operational disadvantages of fouling control via application of shear stress occur while changing the properties of the solute or particles, such as cell breakup, bacterial population change, or shear stress classification. The literature teaches that future developments on shear stress for membrane systems must be addressed, in addition to energy consumption, shear stress distribution and the development of combined analytical methods to characterise and visualise shear in situ for different membrane configurations. © 2016 Society of Chemical Industry

show abstract

“…However, one significant disadvantage of RO process for municipal wastewater reclamation is linked to the disposal of a concentrated (Azaïs et al, 2016;Bagastyo et al, 2011;Hurwitz et al, 2014;Miralles-Cuevas et al, 2017;Pérez et al, 2010). Municipal RO concentrate is typically characterized by a pH range of 6.9-8.8, high levels of conductivity (1.7-23.5 mS cm -1 ), persistent organic matters (DOC: 14-68 mg L −1 ) and a broad range of emerging organic contaminants (Bagastyo et al, 2011;Deng, 2020;Pérez et al, 2010;Pradhan et al, 2015;Zhou et al, 2011). The concentration of micropollutants in RO concentrate usually multiplies by a factor of 2-7 as compared to RO feed water (Bagastyo et al, 2011;Pérez-González et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Ozonation mechanism of carbamazepine and ketoprofen in RO concentrate from municipal wastewater treatment: Kinetic regimes, removal efficiency and matrix effect

Deng

2020

Science of The Total Environment

View full text Add to dashboard Cite

A relatively important disadvantage of reverse osmosis (RO) application to municipal wastewater reclamation is related to management of a concentrated waste stream containing high levels of organic contaminants. The present study investigated ozonation performance of RO concentrate from municipal wastewater treatment in a stirred semi-batch reactor. In this work, carbamazepine (CBZ, as a representative of ozone-reactive micropollutants) and ketoprofen (KET, one of ozone-resistant organic chemicals) were selected as target micropollutants. The absence of dissolved ozone within the first 60 min corresponding to initial ozone demand (IOD) complement suggested that chemical reactions took place quite fast, and ozone mass transfer was considered as a limiting step. A complete elimination of CBZ and an excellent removal of KET were observed in this period, indicating that molecular ozone was a dominated oxidant responsible for the decomposition of the target micropollutants in RO concentrate containing initial dissolved organic carbon (DOC 0 ,~50.8 mg L −1 ). N90% of ozone-reactive CBZ was eliminated at a low ozone dose of 0.33 g consumed ozone per g DOC 0 . More ozone dose requirement for an equivalent removal of KET was ascribed to its low ozone kinetic rate constant below 10 L mol −1 s −1 . In addition, the presence of high contents of organic matters and alkalinity in RO concentrate exhibited pronounced effects on the degradation of KET because of a competition with oxidants. Overall, ozonation appeared to be a promising alternative for disposal of RO concentrate in terms of micropollutant removal. However, additional technologies should be followed to further enhance the degradation rate of organic matters for a zero liquid discharge treatment scheme.

show abstract

Removing organic and nitrogen content from a highly saline municipal wastewater reverse osmosis concentrate by UV/H2O2–BAC treatment

Cited by 47 publications

References 33 publications

Potential of Chlorella vulgaris and Nannochloropsis salina for nutrient and organic matter removal from municipal wastewater reverse osmosis concentrate

Potential of Chlorella vulgaris and Nannochloropsis salina for nutrient and organic matter removal from municipal wastewater reverse osmosis concentrate

Shear stress in a pressure-driven membrane system and its impact on membrane fouling from a hydrodynamic condition perspective: a review

Ozonation mechanism of carbamazepine and ketoprofen in RO concentrate from municipal wastewater treatment: Kinetic regimes, removal efficiency and matrix effect

Contact Info

Product

Resources

About