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

2004 ◽  
Vol 38 (19) ◽  
pp. 4186-4196 ◽  
Author(s):  
Oriol Gibert ◽  
Joan de Pablo ◽  
José Luis Cortina ◽  
Carlos Ayora
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Organic Substrates ◽  
Acid Mine

scholarly journals Evaluation of fine organic mixtures for treatment of acid mine drainage in sulfidogenic reactors

2018 ◽  
Vol 78 (8) ◽  
pp. 1715-1725 ◽  
Author(s):  
N. Pérez ◽  
A. Schwarz ◽  
J. de Bruijn
Keyword(s):  
Acid Mine Drainage ◽  
Microcrystalline Cellulose ◽  
Mine Drainage ◽  
Cellulose Fibers ◽  
Organic Substrates ◽  
Organic Mixtures ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Fine Organic ◽  
Diffusive Exchange

Abstract The performance of passive biochemical reactors in acid mine drainage (AMD) treatment could be enhanced by using fine organic substrates in new reactor designs, such as diffusive exchange reactors. This work evaluated the effect of fine cellulosic components in organic mixtures and of enrichment with inoculum, on sulfate and metals removal in discontinuous cultures for three types of synthetic AMD. The cellulosic substrates evaluated were sawdust, microcrystalline cellulose, and forestry cellulose fibers, supplemented with cow manure and leaf compost. Using microcrystalline cellulose and forestry cellulose fibers with the less concentrated AMD, high sulfate reduction rates (73 mg/L-d and 58.2 mg/L-d, respectively) were achieved. Correspondingly, iron concentrations were reduced by 69% and 86.6%. Based on their higher sulfate reducing capacity, cellulose fibers obtained as fiber boards from a local kraft pulp mill were selected for treating a synthetic AMD with a high copper concentration (273 mg/L) and pH 4.94. In batch culture, low sulfate reducing activity (13.10 mg/L-d) was only observed at the highest substrate/AMD ratio (0.5:10) tested. Results show that the use of forestry cellulose fibers in reactive mixtures supplemented with inoculum could be an alternative for optimization of diffusive exchange reactors for AMD treatment.

scholarly journals Chemical characteristics of organic wastes and their potential use for acid mine drainage remediation

2012 ◽  
Vol 12 (2) ◽  
pp. 167
Author(s):  
Ali Munawar ◽  
Riwandi Riwandi
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Chemical Properties ◽  
Metal Sulfide ◽  
Organic Wastes ◽  
Chicken Manure ◽  
Nutrient Concentrations ◽  
Organic Substrates ◽  
Empty Fruit Bunch ◽  
Acid Mine

Organic substrate is an important component of biological treatments for acid mine drainage (AMD) remediation systems. It provides organic substrates to sulfate-reducing bacteria (SRB) in the sulfate (SO4) reduction, resulting in increased alkalinity and metal sulfide precipitates. Natural organic matters vary in their characteristics, and therefore may perform differently for remediation properties. This study was aimed to characterize four locally available organic wastes (bark, empty fruit bunch, sawdust, and chicken manure) potential for AMD remediation. Their chemical properties and elemental compositions were measured. An anaerobic incubation of these wastes in AMD was undertaken to determine their remediation properties. The pH, electrical conductivity (EC), redox potential (Eh), and dissolved Fe and SO4 of the mixtures were measured after the 1st, 7th, 14th, and 30th day of the incubation at room temperature. The results demonstrated that organic wastes varied in their chemical properties and performed differently in treating AMD. Organic wastes containing high alkalinity (high pH) and nutrient concentrations (chicken manure and empty fruit bunch) improved AMD quality through increasing pH (>6) and reducing dissolved Fe and SO4 concentrations. Although sawdust and bark (high CEC) did not increase pH up to acceptable standard at most time, they apparently were able to remove dissolved Fe from AMD through adsorption mechanism.

Integrated Sulfate Reduction and Biosorption Process for the Treatment of Mine Drainages

2017 ◽  
Vol 262 ◽  
pp. 582-586 ◽  
Author(s):  
Davor Cotoras ◽  
Cristian Hurtado ◽  
Pabla Viedma
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Organic Substrates ◽  
Sulfate Concentration ◽  
Sulfate Reducing ◽  
Acid Mine ◽  
Biosorption Process ◽  
Sulfate Removal ◽  
Complex Organic ◽  
Economical Alternative

Sulfate is a pollutant present in the mining waste water and acid mine drainage. High levels of sulfate can generate important environmental problems. One of the alternatives proposed for the treatment of water with high levels of sulfate is the use of sulfate-reducing microorganisms. This work describes the synergistic combination of a treatment system for the removal of metals by biosorption with the strain Bacillus sp. NRRL-B-30881 to reduce the inhibiting concentration of metals in waters, followed by a new process of sulfate removal that uses a halotolerant sulfate-reducing microbial consortium. The results show that the sulfate reducing consortium can be cultured and is able to reduce the sulfate concentration using cheaper complex organic substrates like spirulina, cellulose and industrial starch. The sulfate reducing consortium was cultured on a bioreactor with Celite R-635, as support material. Using this bioreactor it was possible to reduce the sulfate concentration in the culture medium in batch or semi-continuous operation. An acid mine drainage was pretreated by lime and treated by biosortion in order to increase the pH and reduce the heavy metals concentration. Subsequently the remaining sulfate was removed by the developed process. This integrated biological process represents a more economical alternative for the removal of metal by biosortion and the removal of sulfate using a sulfate reducing consortium.

scholarly journals Aquatic Plants for Acid Mine Drainage Remediation in Simulated Wetland Systems

2012 ◽  
Vol 13 (3) ◽  
pp. 244
Author(s):  
Ali Munawar ◽  
Farkhruddin Okte Leitu ◽  
Hendri Bustamam
Keyword(s):  
Acid Mine Drainage ◽  
Plant Species ◽  
Aquatic Plants ◽  
Aquatic Plant ◽  
Mine Drainage ◽  
Plant Biomass ◽  
Growth Media ◽  
Organic Substrates ◽  
Acid Mine ◽  
Wetland Treatment

Aquatic plant is an important component of a constructed wetland system for treating acid mine drainage (AMD).This study was conducted to investigate the remediation effects of planting three aquatic plants species on AMDquality in simulated wetland systems. Simulated wetland systems were constructed using 10-L plastic containersas growth media comprising mixed-organic substrates and aquatic plant species as planting treatments. Thetreatments involved individual plantings with Fimbristilys hispidula (Vahl) Konth, Mariscus compactus (Retz) Druce,and Typha angustifolia L., and mixed-planting with a combined three-plant species. As the control was the unplantedmedia. The plants were continuously flooded with very acidic AMD collected from a mine pit in PT TambangBatubara Bukit Asam, South Sumatra. During the experiment, the acidity (pH), oxidation reduction potential (Eh),and electrical conductivity (EC) of the flooding AMD were measured after 24 hours of the flooding, and thenbiweekly until the plants entered their reproductive stage. To estimate Fe removed by plants, AMD samples weretaken from both planted and unplanted systems for total dissolved Fe analyses. The data revealed some remediationeffects of planting aquatic plants on AMD in the wetland treatment systems. The presence of plants in the wetlandsystem appeared to induce oxygen diffusion to surrounding roots, which might result in Fe precipitation on rootsurface. Although no differences among planting treatments, Fe removals by plants highly correlated (R2=0.92)with the production of plant biomass.

Sign in / Sign up

Export Citation Format

Share Document