MAP Precipitation from Landfill Leachate and Seawater Bittern Waste

Abstract

The leachates generated at Hong Kong landfill sites contain high strength of ammonium-nitrogen

Physico-chemical treatments for removal of recalcitrant contaminants from landfill leachate

“…Although the characteristics of landfill leachate depend on the type of MSW being dumped, the degree of solid waste stabilization, site hydrology, moisture content, seasonal weather variations, age of the landfill and stage of the decomposition in the landfill [8], the common features of stabilized leachate are high strengths of NH 3 -N (3000-5000 mg/L) and moderately high strength of COD (5000-20,000 mg/L), as well as a low ratio of BOD/COD (less than 0.1) [9]. A landfill site may still produce leachate with high concentration of NH 3 -N over 50 years after filling operations have ceased [10].…”

Degradation of recalcitrant compounds from stabilized landfill leachate using a combination of ozone-GAC adsorption treatment

“…During the decomposition process, a highly contaminated wastewater called "leachate" is generated by excess rainwater percolating through the waste layers in the landfill [6]. The common features of raw leachate from a local landfill are its high concentrations of ammoniacal nitrogen (NH 3 -N) (2000-5000 mg/L) and moderately high strength of recalcitrant compounds (as reflected by its COD value) (5000-20,000 mg/L), as well as a low ratio of BOD 5 /COD of less than 0.1 [7,8].…”

Phosphate removal in agro-industry: Pilot- and full-scale operational considerations of struvite crystallization

“…Alkaline additionc an be combinedw ith the requiredm agnesium supplementation by using either MgO or Mg(OH) 2 (von Mü nch and Barr, 2001). Other magnesium sources include magnesium chloride, magnesium sulphateo rs eawater bittern waste (Li and Zhao, 2002). If ammonium removal is targeted, both magnesium and phosphate have to be supplied.…”