8/13/2019 12wim Ortiz y Col 2012

1/18

Extensive technologies for the treatment of sulphate in tailing facility effluents: from bench to the pilot plant

Claudia Ortiz, Mario Carreo and Marcela WilkensFaculty of Chemistry and Biology, University of Santiago de Chile, ChileAndre Gerth and Anja HebnerBioPlanta GmbH, Germany

8/13/2019 12wim Ortiz y Col 2012

2/18

PROBLEM Mining activities generate liquid waste

containing heavy metals and high concentrations of sulphates.

8/13/2019 12wim Ortiz y Col 2012

3/18

SOLUTION A strategy for the treatment of this waste is

the use of biological systems with sulphate reducing bacteria (SRB) and metal accumulating plants.

8/13/2019 12wim Ortiz y Col 2012

4/18

ADVANTAGES Biological treatment of mining residual waters

is an economically interesting approach Environmentally friendly

Low energy cost

8/13/2019 12wim Ortiz y Col 2012

5/18

PROPOSAL The project proposes a technological solution

consisting of a treatment system made by an anaerobic sulphate reducing system that

uses bacteria

coupled

to

an

optimized

wetland system.

8/13/2019 12wim Ortiz y Col 2012

6/18

LOCATION

Second region of Antofagasta (Talabre, Chuquicamata)

Treatment of tailing facility effluents 2,800 mg/L sulphate; pH 7.0 8.0; Cu 0.5 1.0 mg/L; Mn up to 3.0 mg/L

Up to 50 m 3/day

8/13/2019 12wim Ortiz y Col 2012

7/18

#

#

#

#

#

#

#

#

#

#

#

#

#

#

#

%%

"

" ""

2445

2457

2542

2459

2507

2442

2515

2481

2469

2477

2470

2486

2515

2486

2493

2515

PARCELASDE MUESTREO

DEPRESIONCON VEGETACION

BOFEDAL NOLANA

VEGA

ENTRADA AL TRANQUE INSTALACIONES

COLA DE ZORRO

**

2515

2493

2486

2515

2486

2470

2477

2469

2481

2515

2442

2507

2459

2542

2457

2445

TRANQUE DE RELAVE TALABRE

Q u e b r a

d a S u r

Q u

e

b

r a d

a

N o r t

e

C a m i n o a C h i u - C h i u

CARACTERIZACION DEL AREA DE ESTUDIO: TRANQUE DE RELAVE TALABRE, II REGION

ESCALA: 1: 50.000FUENTE: SERNAGEOMIN 2001, Elaboracin prpopia FONDEF D06I1097

N

TRANQUE DE RELAVE

SITIO DE INSTALACION

PILOTO WETLAND

#

#

#

#

#

#

#

#

#

#

#

#

#

#

#

%%

"

" ""

2445

2457

2542

2459

2507

2442

2515

2481

2469

2477

2470

2486

2515

2486

2493

2515

PARCELASDE MUESTREO

DEPRESIONCON VEGETACION

BOFEDAL NOLANA

VEGA

ENTRADA AL TRANQUE INSTALACIONES

COLA DE ZORRO

**

2515

2493

2486

2515

2486

2470

2477

2469

2481

2515

2442

2507

2459

2542

2457

2445

TRANQUE DE RELAVE TALABRE

Q u e b r a

d a S u r

Q u

e

b

r a d

a

N o r t

e

C a m i n o a C h i u - C h i u

CARACTERIZACION DEL AREA DE ESTUDIO: TRANQUE DE RELAVE TALABRE, II REGION

ESCALA: 1: 50.000FUENTE: SERNAGEOMIN 2001, Elaboracin prpopia FONDEF D06I1097

N

TRANQUE DE RELAVE

SITIO DE INSTALACION

PILOTO WETLAND

#

#

#

#

#

#

#

#

#

#

#

#

#

#

#

%%

"

" ""

2445

2457

2542

2459

2507

2442

2515

2481

2469

2477

2470

2486

2515

2486

2493

2515

PARCELASDE MUESTREO

DEPRESIONCON VEGETACION

BOFEDAL NOLANA

VEGA

ENTRADA AL TRANQUE INSTALACIONES

COLA DE ZORRO

**

2515

2493

2486

2515

2486

2470

2477

2469

2481

2515

2442

2507

2459

2542

2457

2445

TRANQUE DE RELAVE TALABRE

Q u e b r a

d a S u r

Q u

e

b

r a d

a

N o r t

e

C a m i n o a C h i u - C h i u

CARACTERIZACION DEL AREA DE ESTUDIO: TRANQUE DE RELAVE TALABRE, II REGION

ESCALA: 1: 50.000FUENTE: SERNAGEOMIN 2001, Elaboracin prpopia FONDEF D06I1097

N

TRANQUE DE RELAVE

SITIO DE INSTALACION

PILOTO WETLAND

8/13/2019 12wim Ortiz y Col 2012

8/18

STRATEGY

Evaluation of performance of three bacterial consortia under laboratory conditions

Bacterial strains and growth conditions Alternative carbon source

Solid matrixes Sulphate removal in synthetic MLIW

8/13/2019 12wim Ortiz y Col 2012

9/18

STRATEGY Evaluation of performance of three bacterial

consortia under laboratory conditions

Bacterial strains and growth conditions Alternative carbon source Solid matrixes

Sulphate removal in synthetic MLIW

8/13/2019 12wim Ortiz y Col 2012

10/18

STRATEGY Technical investigation on microbial sulphate

reduction using model systems

Bacterial growth conditions Carbon source Sulphate removal

8/13/2019 12wim Ortiz y Col 2012

11/18

RESULTS Sulphate reducing activity of the SRB consortia

8/13/2019 12wim Ortiz y Col 2012

12/18

RESULTS Carbon source effect on sulphate reduction C1 C2 C3

Carbon source Incubation

time (7 days)

Earthworm humus

Wheat straw + + +

Sawdust

+

Cork

Coconut fiber +

Guano

Alfalfa

Dr moss + +

White a er +

Peat +

8/13/2019 12wim Ortiz y Col 2012

13/18

RESULTS Effect of the retention time and volume ratio on sulphate reduction (C1)

Experiment

Number Sand/Liquid

ratio Lactic Acid

(mg/L) Retention Time

(h) Reduced sulphate

(%)

1 1:1 30.0 10.0 10.32 1:10 90.0 10.0 14.5

3 1:1 90.0 0.50 12.5

4 1:1 90.0 10.0 13.0

5 1:10 30.0 0.50 10.9

6 1:10 90.0 0.50 14.07 1:10 30.0 0.50 11.5

8 1:1 30.0 0.50 10.5

8/13/2019 12wim Ortiz y Col 2012

14/18

RESULTS Microbial sulphate reduction coupled with sulphide immobilization using reactive material in model systems

A B

C D

8/13/2019 12wim Ortiz y Col 2012

15/18

CONCLUSIONS

Alternative carbon source can be used by sulphate reducing bacteria Retention time and solid matrix did not affect sulphate reduction (3 days)

but the water height has to be considered Sulphate reduction efficiency is higher in a more anaerobic system from

14 % (semi anaerobic) up to 90 % (fully anaerobic) Sulphate reduction is more efficient when working with isolated consortia

CDO is a critical parameter to be considered in the design and operation of a pilot plant.

8/13/2019 12wim Ortiz y Col 2012

16/18

8/13/2019 12wim Ortiz y Col 2012

17/18

8/13/2019 12wim Ortiz y Col 2012

18/18

Usach: CORFO-INNOVA 09CN14-5795.BioPlanta: Federal Ministry of Economics and Technology,Germany