Applicability of passive compost bioreactors for treatment of extremely acidic and saline waters in semi-arid climates

Metal removal mechanisms in a short hydraulic residence time subsurface flow compost wetland for mine drainage treatment

“…The investigations of Strosnider et al (2011Strosnider et al ( , 2013 and Song et al (2012) also used systems in which hydraulic residence time was measurable in days. Biermann et al (2014) calculated system HRT of at least a week for most operating conditions, and the dimensions and flow-rate of the large-scale free water surface wetland system for metal removal investigated by Di Luca et al (2011) suggest that HRT was on the order of a week in that case also.…”

“…(2) Many investigations of the potential for compost-based wetland systems to remove metals from mine drainage have focused on high strength, low pH mine drainage, in which iron is often the main pollutant (e.g. Biermann et al, 2014). Strosnider et al (2011Strosnider et al ( , 2013 investigated Zn removal in compost-based systems, but with Zn concentrations of 390 mg/L (Strosnider et al 2011) and 550 mg/L (Strosnider et al, 2013).…”

Reactores Bioquímicos Pasivos: Una alternativa biotecnológica para la remediación de drenajes ácidos de mina

“…En estudios por lotes se ha determinado que cuando se utiliza un buen inóculo, la remoción de sulfato y la producción de sulfuros se realiza en períodos más cortos (Pereyra et al, 2012). Como inóculo se puede utilizar sedimentos de lagos y de ríos contaminados con DAM en donde se encuentren microorganismos aerobios que favorezcan el rápido consumo de oxígeno y nitrato, así como organismos anaerobios que se establezcan en el reactor (Biermann et al, 2014). Diferentes estudios indican que, en gran medida el rendimiento y longevidad de los biorreactores depende de la actividad de las BSR (Rezadehbashi y Baldwin, 2018).…”

Use of propionic acid additions to enhance zinc removal from mine drainage in short residence time, flow-through sulfate-reducing bioreactors

“…Attenuation of zinc in low-cost, low maintenance passive systems with a short hydraulic residence time (HRT) to enable a small footprint is therefore favoured (Gandy et al, 2016). Whilst many investigations into the potential of compost bioreactors for mine drainage remediation have used systems in which HRT is measurable in days (Biermann et al, 2014;Cruz Viggi et al, 2010;Di Luca et al, 2011;Song et al, 2012;Strosnider et al, 2011Strosnider et al, , 2013, recent research has demonstrated successful removal of zinc in a HRT of less than 14.5 h (Gandy et al, 2016). In the research reported here the limitations of compost bioreactors, particularly for the remediation of highly contaminated UK discharges, were investigated together for the first time.…”