Chemical characterisation of natural organic substrates for biological mitigation of acid mine drainage

Gibert, Oriol; Pablo, Joan de; Cortina, José Luis; Ayora, Carlos

doi:10.1016/j.watres.2004.06.023

Cited by 176 publications

(143 citation statements)

References 33 publications

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“…Hence, other materials such as rice husk [15] and peat/crushed pine bark [16] have been successfully tested. Organic substrates have also been used as electron donors for sulfate reducers in passive remediation systems for the treatment of acid mine drainage [17]. Another remarkable application of organic substrates is the treatment of low C/N wastewater as extra carbon is needed to enhance denitrification efficiency [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Melián

Borreguero-Fabelo

Araña

et al. 2018

Water

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Abstract:A hybrid constructed wetland mesocosm has been used for the treatment of raw urban wastewater. The first stage was a mulch-based, subsurface, horizontal flow constructed wetland (HF). The HF achieved good removals of COD (61%; 54 g/m 2 ·day) and Total Suspended Solids (84%; 29 g/m 2 ·day). The second stage was composed of vertical flow constructed wetlands (VF) that were employed to study the effect of substrate (gravel vs. mulch), feeding mode (continuous vs. intermittent) and the number of stages (1 vs. 2) on performance. High hydraulic and organic surface loadings (513-583 L/m 2 ·day and 103-118 g/m 2 ·day of COD) were applied to the reactors. The mulch was more efficient than gravel for all the parameters analyzed. The continuous feeding allowed a 3 to 6-fold reduction of the surface area required.

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Section: Introductionmentioning

confidence: 99%

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Melián

Borreguero-Fabelo

Araña

et al. 2018

Water

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“…During the secondary stages of incubation, simple molecules might have been exhausted from the medium while promoting growth of SRB in the primary stages and, consequently, sulphate reduction rates decreased reasonably. The preference of SRB for simple organic molecules is a well reported phenomenon (Nagpal et al 2000;Gibert et al 2004;Tsukamoto et al 2004;Zagury et al 2006). When the SRB started to utilize this complex polymeric substrate, again increments in growth as well as sulphate reductions were recorded (Figs.…”

Section: Resultsmentioning

confidence: 71%

Application of sugarcane bagasse for passive anaerobic biotreatment of sulphate rich wastewaters

Hussain

Qazi

2014

Appl Water Sci

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Biological treatment of sulphate-rich wastewaters employing dissimilatory sulphate reducing bacteria as remedial agents is an attractive technique and has gained importance in the last few years. Industrial effluents enriched with sulphates are generally deficient in electron donors. And thus cannot be treated biologically without supplementation of carbon through an external source. For scalable operations, however, the carbon source must not be expensive. In this context, present study reports the efficiency of biological sulphate reduction using sugarcane bagasse as a cost-effective carbon source. An average 0.00391 ± 0.001 gL -1 day -1 (3.91 mgL -1 day -1) sulphate reduction was observed reaching maximally to 0.00466 ± 0.001 gL -1 day -1 (4.66 mgL -1 day -1) while employing Desulfovibrio fructosovorans-HAQ2 and Desulfovibrio piger-HAQ6 in a 60-day trial of anaerobic incubation using sugarcane bagasse as growth substrate. These findings will be helpful in developing economical bioremediation processes tending to operate for a longer period of time to reduce sulphate contents of contaminated waters.

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“…The chemical components in these organic materials can be classified as 1) easily available substances (soluble sugars, starch, amino acids, some proteins), 2) cellulose and hemicellulose and 3) lignin (Gibert et al, 2004). The first group are utilized relatively easily and rapidly by SRB's and their associated microbes and are commonly depleted during the first months of AMD treatment in an organic bed (Place et al, 2006).…”

Section: Organic Materialsmentioning

confidence: 99%

Advances in Passive Treatment of Coal Mine Drainage 1998-2009

Rose¹

2010

JASMR

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Abstract. This report updates the review of passive treatment prepared by the Acid Drainage Technology Initiative (Skousen et al., 1998). Important advances since that report include: 1. Measured and calculated acidities are net acidities that are robust measures of this parameter. 2. Removal rates of Fe at pH>5 can be enhanced by CO 2 degassing, by catalysis by solid Fe phases and by specialized aerators; at pH<5, low pH Fe oxidation by bacteria can be helpful in treating high-Fe acidic discharges. 3. For low-Fe-Al AMD, oxic limestone drains can be effective for treatment, but effectiveness declines over years owing to accumulation of precipitate. 4. For high Fe or Al AMD, limestone beds with timed flushing devices can remove large amounts of metals, though eventual cleaning of the limestone may be needed. 5. Addition of limestone sand or lime to streams can be a cost-effective method of restoring watersheds 6. Vertical flow ponds (VFP's, SAPS) can be sized using a loading factor of 25-35 g of acidity/m 2 /d. 7. Manual flushing of VFP's removes only a few percent of accumulated Al precipitate, but timed flushing can be much more effective. 8. Common problems of VFP's include inadequate size, accumulation of Fe precipitate on compost, deterioration owing to Al coatings, and construction defects. 9. Sulfate reduction in passive systems involves a complex community of microbes, with long-term rates dependent on cellulose degrading microbes. Mixtures of fresh organic matter with high-cellulose material appear to provide good performance in lab tests, but more data on longer-term behavior is needed. 10. Sulfate-reducing bioreactors process Al better than older VFP's. 11. Steel slag and chitin hold promise for effective treatment of AMD. 12. A relation for sizing of limestone beds for Mn removal has been developed. 13. Fe precipitate from sludge is being successfully sold for pigment production, and Mn-rich concentrate has been recovered from limestone beds. 14. A revised flow chart for selection of treatment method has been prepared, and the AMDTreat computer program allows easy costing of passive treatment.

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Chemical characterisation of natural organic substrates for biological mitigation of acid mine drainage

Cited by 176 publications

References 33 publications

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Application of sugarcane bagasse for passive anaerobic biotreatment of sulphate rich wastewaters

Advances in Passive Treatment of Coal Mine Drainage 1998-2009

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