Immediate one-step lime precipitation and atmospheric carbonation as pre-treatment for low biodegradable and high nitrogen wastewaters: A case study of explosives industry

Phytoremediation as a Sustainable Alternative for Organic Matter Removal From Slaughterhouse Wastewater Pretreated by Immediate One-Step Lime Precipitation

“…Before constructed wetland treatment, SWW was previously pretreated by immediate one-step lime precipitation process, according to Madeira et al [15].…”

Vertical flow constructed wetland as a green solution for low biodegradable and high nitrogen wastewater: A case study of explosives industry

“…Explosives wastewater was collected from an international in-dustry of ANFO and emulsion explosives, in Portugal. Then, EW was pretreated using a combined immediate one-step lime precipita-tion (IOSLM) and atmospheric CO2 carbonation (AC) processes as presented in Madeira et al (2020). IOSLM process was used to remove COD and consisted of applying an optimal hydrated lime dose (7.76 g L 1 ) to the EW, under vigorous agitation for 1 min.…”

“…Moreover, any eventual nitrate production from nitrification would be too little for that. This increase in the redox potential may be related to the decrease in the pH of the effluent (DeLaune and Reddy, 2005), caused bythe interaction between PEWand CO2 present inside the bed, releasing H f ions (Madeira et al, 2020).…”

“…Explosives wastewaters (EW), from the ammonium nitrate-fuel oil (ANFO) and emulsion industries, are industrial wastewaters with high amounts of nitrogen (in the form of nitrates and/or ammonium nitrogen) and high non-biodegradable organic matter. Due to these characteristics, these wastewaters are very difficult to treat (Madeira et al, 2020). The present work aims to: (i) evaluate the use of VFCW planted with Vetiveria zizanioides to remove ammonium and nitrate from a pretreated explosives wastewaters (PEW), using two different flooding conditions; (ii) analyze the increase of organic mass load in the nitrogen forms removal; and (iii) study the impact of the different C/N ratios on the removal of nitrogen compounds.…”

Optimization of atmospheric carbonation in the integrated treatment immediate one-step lime precipitation and atmospheric carbonation. The case study of slaughterhouse effluents

“…organic matter, phosphorus, and nitrogen), they are not designed to remove high concentrations of these compounds, so on-site pre-treatment is required [1,2]. The integrated process, immediate one-step lime precipitation (IOSLM) followed by atmospheric carbonation (AC), has been used as a pretreatment for industrial wastewaters, such as explosives [3], vinasse from sugarcane ethanol industry [4], winery [5], cheese whey [6], urban wastewaters [7], and landfill leachate [8]. This integrated solution is recognized for its low cost, simplicity, eco-friendly technology and high efficiency in removing contaminants, like organic matter and nitrogen (Madeira et al [3].…”