MAP Precipitation from Landfill Leachate and Seawater Bittern Waste

  title={MAP Precipitation from Landfill Leachate and Seawater Bittern Waste},
  author={X. Z. Li and Q. L. Zhao},
  journal={Environmental Technology},
  pages={1000 - 989}
  • X. Li, Q. Zhao
  • Published 1 September 2002
  • Materials Science
  • Environmental Technology
The leachates generated at Hong Kong landfill sites contain high strength of ammonium-nitrogen (NH4 +-N) over 3,000 mg l−1 and are generally inhibitive to most biological treatment processes. To remove the NH4 +-N from the landfill leachates and also recover the nitrogen as a struvite fertilizer, a lab-scale study was performed to investigate the feasibility of NH4 +-N removal and struvite crystallization using different magnesium sources. Three combinations of chemicals, MgCl2·6H2O+Na2HPO4… 
Struvite precipitation for the recovery of ammonium nitrogen from landfill leachate
Struvite (MgNH4PO4.6H2O, MAP) precipitation is an effective method to recover ammonium nitrogen (NH4-N) from wastewater into a valuable and environmental friendly material. It is crystallized by a
Use of side stream-based MgSO4 as a chemical precipitant in the simultaneous removal of nitrogen and phosphorus from wastewaters
Wastewaters and agricultural sludges can contain high concentrations of phosphate and ammoniumor nitrate–nitrogen, which run off easily to waterways causing eutrophication in water bodies. However,
Use of sidestream based MgSO4 as chemical coagulant in the simultaneous removal of nitrogen and phosphorus from wastewaters
Phosphorus as phosphate and nitrogen as ammonium or nitrate are the main nutrients in wastewaters and agricultural sludges. They runoff easily to waterways and cause eutrophication in water bodies.
Ammonium-Nitrogen Recovery from Wastewater by Struvite Crystallization Technology
Struvite crystallization is one of the sustainable approaches for recovering ammonium nitrogen (NH4-N) from wastewater in the form of a valuable material, in parallel with improving wastewater
Preparation of high-purity magnesium-ammonium-phosphate fertilizer using sea bittern and industrial waste streams
The production of fertilizer magnesium ammonium phosphate, commonly known as struvite, has been investigated in this study by mixing waste effluents of different sources to help in waste management and controlling environment hazards of P and N discharge in water bodies with economic benefits.
Struvite Crystallization: An Effective Technology for Nitrogen Recovery in Landfill Leachate
The presence of different sorts of nutrients in wastewater raises the concern on adopting effective treatment techniques, to prevent potential adverse impacts on the environment’s components, as well
Treated Seawater as a Magnesium Source for Phosphorous Recovery from Wastewater—A Feasibility and Cost Analysis
The current study analyzes the feasibility of integrated membrane processes for magnesium recovery from seawater for utilization in the phosphorous recovery process and finds the lowest associated cost is found for standalone NF treatment.
Biological processes for treatment of landfill leachate.
The selection of the most suitable treatment for leachate depends on its characteristics, technical applicability and potential constraints, effluent limit required, cost-effectiveness, regulatory requirements and long-term environmental impacts.
Application of struvite precipitation coupled with biological treatment to slaughterhouse wastewaters
The application of struvite precipitation both prior to and after biological treatment resulted in similar effluent qualities and provided the additional benefit of having a high‐rate activated sludge system instead of a low organic loading system with nitrification–denitrification.
Precipitation of Ammonium from Concentrated Industrial Wastes as Struvite: A Search for the Optimal Reagents
Efficient precipitation of ammonium from concentrated industrial waste stream is accomplished by using magnesium oxide (MgO) both as a source of magnesium ions and as a base, and best results were obtained with technical-grade MgO, which provided 99% removal of ammonia.


Coagulation of Alkalinized Municipal Wastewater Using Seawater Bittern
Laboratory studies were conducted to determine the efficacy of seawater bittern as a coagulant for the treatment of municipal wastewater. Freshly collected grab samples of municipal wastewater from
Removal of Nutrients in Wastewater by using Magnesium Salts
The removal of ammonia nitrogen and phosphorus from wastewater by precipitating out with magnesium salts was showed. Factors of pH, reaction time, N/P ratio, and dissolution test were investigated to
Conditions influencing the precipitation of magnesium ammonium phosphate.
The Simultaneous Chemical Precipitation of Ammonium and Phosphate in the form of Magnesium-Ammonium-Phosphate
Precipitation of ammonium together with phosphate and magnesium is a possible alternative for lowering the nitrogen content of waste water and sludge liquor. Certain chemical conditions need to be
Review of the Feasibility of Recovering Phosphate from Wastewater for Use as a Raw Material by the Phosphate Industry
Phosphate recovered from wastewater may represent an alternative source of raw material for the manufacture of phosphate products. Within wastewater treatment plants phosphate has been found to
Phosphorus Removal from Sidestreams by Crystallisation of Magnesium‐Ammonium‐Phosphate Using Seawater
In recent years, a number of biological‐treatment processes have been developed for phosphorus removal, alone or in combination with nitrogen. In anaerobic/oxic and anaerobic/anoxic/oxic processes,