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Recovery of nitrogen and phosphorus from synthetic wastewater through crystallization process

Recovery of nitrogen and phosphorus from synthetic wastewater through crystallization process

Mohamad Amran Mohd Salleh1,*, Nur Masturah Abdul Razak1, Md. Mukhlesur Rahman2, Suraya Abdul Rashid1

HIGHLIGHTS

  • Nitrogen and phosphorus are the key elements for eutrophication.
  • Crystallization is an excellent way of nutrient recovery from wastewater.
  • Struvite and its derivatives (MgNH2PO3.7H2O) can be used as a fertilizer.
  • Struvite crystallization simultaneously recovers valuable products from wastewater.
  • This study can help to reduce the risk of water pollution.

ABSTRACT

High amount of nitrogen (N) and phosphorus (P) in wastewater is hazardous to aquatic environment as it triggers the eutrophication. Hence, the removal of N and P from wastewater is an important issue to save the water environment. The aim of this study was to recover the N and P from synthetic wastewater through crystallization process. Recovery of ammonium and phosphate through crystallization at different operational conditions were observed. Parameters studied were pH, reaction time and stirrer speed. Removal efficiency of NH4+ and PO43- were related to the level of pH. The highest removal of NH4+ and PO43- (85% and 47%, respectively) were observed at pH 9.5 with the 1:1:1 molar ratio of PO4:Mg:NH4. Moreover, stirring speed showed minor effects on the crystal production. Nonetheless, the crystal production was the same at different time periods. The morphology of the crystal was studied through scanning electron microscopy (SEM) and the X-ray diffraction (XRD) pattern and it was proved that the precipitated crystals were derivatives of struvite, called magnesium amide phosphate hydrate (MgNH2PO3.7H2O). Hence, the formation of struvite crystal derivatives from wastewater might be an effective way to remove and recover ammonium and phosphate from wastewater and thus, able to reduce water and environmental pollution. Therefore, valuable crystal fertilizers can be recovered from wastewaters of livestock farms, municipal sewage or industries. It also can minimize nutrient loading and improve water quality significantly.

© 2016 Ababil Publishers. All rights reserved.

To cite this article: Salleh MAM, Razak NMA, Rahman MM, Rashid SA. Recovery of nitrogen and phosphorus from synthetic wastewater through crystallization process. Journal of Desalination and Water Purification 2016;3:11-16.

To link this article: http://ababilpub.com/download/jdwp3-3/

Characteristics and economic value of the rejected brine at Al-Khobar desalination plant in KSA

Characteristics and economic value of the rejected brine at Al-Khobar desalination plant in KSA

Alrowaished Abdulsalam1,*, Azni Idris1, Amimul Ahsan2, Thamer A. Mohamed2

HIGHLIGHTS

  • Characteristics of seawater and brine from Al-khobar desalination plant were studied.
  • Many minerals (e.g. SO42- & K+) can be recovered directly from the rejected brine.
  • The economic value of the rejected brine was studied.
  • This study can help the policy makers to install plants for brine processing.

ABSTRACT

This paper presents the characteristics of seawater and rejected brine, and the economic value of the rejected brine at Al-Khobar desalination plant, KSA. The rejected brine may be discharged to sea/ocean contains of different salts and dissolved minerals in high concentrations, which carry considerable economic value in relevant industries. It is found that the rejected brine contains huge amount of SO42-, Cl, Na+, Ca2+, Mg2+, K+, Fe2- and Cu2+, which have high economic value. Therefore, these minerals can be recovered directly from the rejected brine. This study estimated the quantities of these minerals and the revenue income according to their current market prices. Moreover, this study may help the policy/decision makers to assess the economic value of the brine to establish new industries for brine processing. Seawater and brine samples collected from the Al-Khobar plant. Various physical and chemical properties were observed in order to find economic value of minerals.

© 2016 Ababil Publishers. All rights reserved.

To cite this article: Abdulsalam A, Idris A, Ahsan A, Mohamed TA. Characteristics and economic value of the rejected brine at Al-Khobar desalination plant in KSA. Journal of Desalination and Water Purification 2016;3:3-10.

To link this article: http://ababilpub.com/download/jdwp3-2/

Water scarcity, potential alternative sources and treatment feasibility

Water scarcity, potential alternative sources and treatment feasibility

MA Imteaz

With ever-increasing population and impacts of climate change, water supply systems in many cities of the world are under tremendous stress. Water authorities in many major cities around the world are struggling to maintain required water demand. Available potable water supply is crucial in some mega cities within developing and poor countries. Developed nations with ample resources and wealth are managing their demands to a satisfactory level, however still facing challenge to tackle demands. As such, water authorities are adopting several measures including demand management and identifying alternative water sources such as stormwater harvesting, greywater and wastewater reuse and desalination. During a decade long (2003~2012) drought in Australia, government spent 18 billion dollars to construct several desalination plants, most of those are now sitting idle as the climate has reversed with ample rains, which sufficiently contributing to the water supply reservoirs to fulfill the demands…

© 2016 Ababil Publishers. All rights reserved.

To cite this article: Imteaz MA. Water scarcity, potential alternative sources and treatment feasibility. Journal of Desalination and Water Purification 2016;3:1-2.

To link this article: http://ababilpub.com/download/jdwp3-1/

Journal of Desalination and Water Purification, Volume 3, Issue June 2016, Pages 1-16, Articles 1-3 (30 June 2016)

Journal of Desalination and Water Purification

Volume 3, Issue June 2016, Pages 1-16, Articles 1-3 (30 June 2016)

Editorial Board                                                     p. i

Acknowledgement to Reviewers                    p. i

Journal Information                                           p. ii

Contents                                                                p. iii

Articles                                                                   pp. 1-16

Imteaz MA.
Water scarcity, potential alternative sources and treatment feasibility
Journal of Desalination and Water Purification 2016;3:1-2.

Abdulsalam A, Idris A, Ahsan A, Mohamed TA.
Characteristics and economic value of the rejected brine at Al-Khobar desalination plant in KSA
Journal of Desalination and Water Purification 2016;3:3-10.

Salleh MAM, Razak NMA, Rahman MM, Rashid SA.
Recovery of nitrogen and phosphorus from synthetic wastewater through crystallization process 
Journal of Desalination and Water Purification 2016;3:11-16.

© 2016 Ababil Publishers. All rights reserved.

Volume 1, Issue November 2015
Volume 2, Issue March 2016

Articles JDWP

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