Sustainable soil amendments to improve nature-based solutions for wastewater treatment and resource recovery

Journal of Environmental Management
Virtudes Martínez-HernándezIrene de Bustamante

Abstract

Vegetation Filters (VFs) can be a sustainable solution to treat wastewater and to recover resources such as nutrients, water and biomass from small municipalities and isolated dwellings. However, under certain conditions, the leakage of nutrients, especially of nitrate, can represent a limitation. The addition of two sustainable soil amendments, woodchips and biochar, has been tested as a strategy to improve nutrient attenuation in VFs increasing sorption sites and microbial activity. To this end, unsaturated infiltration and batch experiments have been carried out at laboratory scale. The systems for infiltration experiments contain natural soil, natural soil amended with woodchips and natural soil amended with biochar. To determine the sorption capacity of NH4+, batch tests were performed using an amendment/SWW ratio of 1:20 and an NH4+ initial concentration ranging from 30 to 600 mg L-1. Results from the infiltration experiments show a high attenuation (~95%) of total phosphorous (TP) independently of the amendments. Different behaviour is observed for total nitrogen (TN). The removal of this species is obtained only in the soil amended with woodchips (>85%) whereas the natural soil alone and the soil with biochar have no im...Continue Reading

References

Nov 1, 2002·Journal of Hazardous Materials·Alka ShuklaShyam S Shukla
Jun 16, 2010·Journal of Agricultural and Food Chemistry·Xiao-Bing YangHong-Ping He
Nov 8, 2011·Water Research·Eimear M RuaneMichael Rodgers
Jan 27, 2015·Journal of Environmental Management·Rachhpal S JassalKelly Sveinson
May 30, 2015·Journal of Environmental Quality·Emily BockZachary M Easton
Jul 15, 2015·The ISME Journal·Rebeca González-CabaleiroJorge Rodríguez
Mar 16, 2016·Journal of Environmental Management·Xiaoqiang CuiXiaoe Yang
Jun 12, 2016·Journal of Environmental Management·Raffaella MeffeIrene de Bustamante
Sep 4, 2017·Journal of Hazardous Materials·V Martínez-HernándezJ J Salas

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