Conference Agenda

Overview and details of the sessions of this Conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Please note that all times are shown in the time zone of the conference. The current conference time is: 29th June 2022, 11:55:05am BST

Session Overview
Mine Water Treatment
Monday, 12/July/2021:
10:10am - 12:15pm

Session Chair: Devin Sapsford
Location: Meeting Room 2

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10:10am - 10:35am
ID: 582 / S_1_2: 1
Full Paper - Oral Presentation
Topic: 2 Passive Treatment Innovation, Bio-Geochemical Systems, 5 Mine Water Treatment Systems
Way of Presentation: Pre-Recorded
Keywords: manganese, passive treatment, mine drainage, Mn carbonates, Fe resistibility

Steel Slag-Limestone Reactor with Resistance to Fe: Laboratory and Pilot Scale Evaluations of Mn Treatment Efficiency

Duk-Min Kim1,2, Youn-Soo Oh2,3, Hyun-Sung Park2, Dae-Gyu Im1, Woong-Lim Lim1, Hye-Rim Kwon1, Joon-Hak Lee2,4

1Sangji University, Republic of Korea; 2Korea Mine Reclamation Corporation (MIRECO), Republic of Korea; 3Department of Earth and Environmental Sciences, Korea University, Republic of Korea; 4Department of Earth Resources and Environmental Engineering, Hanyang University, Republic of Korea

Mixed substrate of steel slag and limestone were applied in reactors to evaluate resistibility to Fe. Steel slag mixed with limestone could decrease Mn from 32–46 mg L-1 to <3 mg L-1 with addition of 4.5–24.4 mg L-1 of Fe in the bench-scale experiment. In the pilot-scale experiments in five mines in South Korea, 95–99% of Mn was removed during the maximum test period of 4 years. Precipitation as Fe and Mn carbonates may have contributed to the Mn removal and resistibility to Fe.

Kim DM, Park HS, Kim DK, Lee, JH (2017) Enhanced Mn treatment in mine drainage using autocatalysis in a steel slag-limestone reactor. In: Wolkersdorfer C, Sartz L, Sillanpää M, Häkkinen A (ed). Proceedings of IMWA 2017, International Mine Water Association, 1063–1069.
Kim DM, Park HS, Hong JH, Lee, JH (2021) Assessing pilot-scale treatment facilities with steel slag-limestone reactors to remove Mn from mine drainage. Mine Water Environ (submitted).

10:35am - 11:00am
ID: 768 / S_1_2: 2
Keynote Speaker

Offscreen-Break Due to No-show or Last Minute Cancellation

IMWA 2021 Organizers

International Mine Water Association

11:00am - 11:25am
ID: 381 / S_1_2: 3
Full Paper - Oral Presentation
Topic: 5 Mine Water Treatment Systems
Way of Presentation: Pre-Recorded
Keywords: influencing factors, recovery, economic analysis

Magnetic Coagulation Technology For Coal Gasification Wastewater Treatment

Jianlei Gao1, Yan Liu1, Yixin Yan1, Wenhao Wang2

1School of Ecology and Environment, Zhengzhou University 450001, Henan, China; 2Zhengzhou University Design and Research Institute Co.Ltd., China

Coal gasification wastewater is refractory for its high colority, complex water quality components, heavy toxicity and poor biochemical purification ability. This study focused on the wastewater treatment of coal gasification in a coal chemical enterprise by magnetic coagulation technology. Under the optimum condition, the removal rate of COD, turbidity and solube SiO2 were 27.6%, 97.0% and 68.4%, respectively. And the average recovery of magnetic powder was up to 97.38%. This paper provides technical guidance for the engineering application of the magnetic coagulation in coal gasification wastewater.

Protein extraction from excess sludge by alkali-thermal hydrolysis [J]. Gao Jianlei, Wang Yingchun, Yan Yixin, Li Zheng, Chen Manli. Environmental science and pollution research international. 2020(8)
Comparison of protein extraction methods from excess activated sludge [J]. Gao Jianlei, Weng Wei, Yan Yixin, Wang Yingchun, Wang Qikun. Chemosphere.
Pretreatment+A/O+ozonation+BAF process for advanced treatment of coal chemical wastewater [J]. Wang Wenhao, Gao Jianlei, Gao Jingqing. Industrial Water Treatment. 2019(6)
Combined process of iron-carbon micro-electrolysis-ABR-improved CASS for pharmaceutical wastewater treatment [J]. Liu Yang, Gao Jianlei, Zhou Zipeng. Industrial Warer Treatment. 2019(5)

11:25am - 11:50am
ID: 406 / S_1_2: 4
Full Paper - Oral Presentation
Topic: 5 Mine Water Treatment Systems, 9 Cleaning up Centuries of Pollution – the UK Approach to managing abandoned Metal Mines and Mine Water
Keywords: Sono-electrochemistry, electrochemistry, liquid chemical free treatment, Soneco, reactor

Final Treatment Trials On Cwm Rheidol - Ystumtuen Mines Discharges, Wales, Using Sono-electrochemistry (Electrolysis With Assisted Power Ultrasound)

Peter Clive Stanley1, Chris Bullen2

1Natural Resources Wales, United Kingdom; 2Power & Water

Results of the successful 2019 Sono-electrochemistry Soneco© final pilot trials using a magnesium electrode are presented. The preferred pH range was 8.8 to 9.0 removing 90.0%, 95.7% and 95.1% total lead, zinc and cadmium.

Full-scale treatment plant would utilise 3.1 kW/m3/h, a clarification area of 57m2 (enabling the lamella to fit in the existing filter beds) generating a sludge volume of 4.8m3/day at 2% w/w (further dewaterable by press). CapEx for a comparable high-density sludge process has an appealing ratio of 1:3. Reducing electrode costs will make OpEx more competitive whilst planned process enhancements will lower CapEx and OpEx further.

Stanley, P.C., James, T. and Cole, S. (2013). Brofiscin Quarry Remediation Scheme, Cardiff, Wales.

Edwards, P., Williams, T. and Stanley, P. (2016). Surface water management and encapsulation of mine waste to reduce water pollution from Frongoch Mine, Mid Wales

Morgan, S.A., Matthews, Z.N., Morgan, P.G. and Stanley, P. (2017). Removal of Iron from Dyffryn Adda, Parys Mountain, N. Wales, UK using Sono-electrochemistry (Electrolysis with assisted Power Ultrasound)

Morgan, S.A., Matthews, Z.N., Morgan, G., Bullen, C. and Stanley, P. (2019). Sono-electrochemistry (Electrolysis with assisted Power Ultrasound) Treatment Trials of discharges from Cwm Rheidol mine, Ceredigion, Mid Wales, UK

11:50am - 12:15pm
ID: 409 / S_1_2: 5
Full Paper - Oral Presentation
Keywords: Electrocoagulation, scale-up parameters, process development. mining waters

Scale-up of Electrochemical Units for Mining Waters Treatment

Maria Mamelkina, Ritva Tuunila, Antti Häkkinen

LUT University, Finland

Mining industry is getting more attracted to developing water treatment technologies. The ease with which technology is brought from lab to industrial scale, along with minimizing the time consumption and costs, is influenced by several factors. Some of these depend on the reactor, removal mechanisms, volumes and operating conditions. While others are affected by external factors such as the maximum size of the equipment, treatment costs of established or alternative technologies. Scale-up is mainly employed to see if the technology meets the market requirements and expectations. This study focuses on transferring an electrocoagulation process from lab scale to pilot plant.

I.Mamelkina, M.A., Cotillas, S., Lacasa, E., Sáez, C., Tuunila, R., Sillanpää, M., Häkkinen, A., Rodrigo, M.A. (2017). Removal of sulfate from mining waters by electrocoagulation. Separation and Purification Technology, 182, pp. 87-93.
II.Mamelkina, M.A., Tuunila, R., Sillanpää, M., Häkkinen, A. (2019). Systematic study on sulfate removal from mining waters by electrocoagulation. Separation and Purification Technology. 216, pp. 43-50.
III.Mamelkina, M.A., Vasilyev, F., Tuunila, R., Sillanpää, M., Häkkinen, A. (2019). Investigation of the parameters affecting the treatment of mining waters by electrocoagulation. Journal of Water Process Engineering. 32, 100929.
IV.Mamelkina, M.A., Herraiz-Carboné, M., Cotillas, S., Lacasa, E., Sáez, C., Tuunila, R., Sillanpää, M., Häkkinen, A., Rodrigo, M.A. (2019). Coagulation mechanisms for the removal of cyanide from mining wastewater. Separation and Purification Technology, 237, 116345.
V. Gafiullina, A., Mamelkina, M., Vehmaanperä, P., Kinnarinen, T., Häkkinen, A. (2020). Pressure filtration properties of sludge generated in the electrochemical treatment of mining waters. Water Research, 181,115922

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