scholarly journals An investigation into the impact of mine closure and its associated cost on life of mine planning and resource recovery

2016 ◽  
Vol 127 ◽  
pp. 228-239 ◽  
Author(s):  
M. Nehring ◽  
X. Cheng
Keyword(s):  
Resource Recovery ◽  
Mine Planning ◽  
Mine Closure ◽  
The Impact

Water Reclamation Practices at the Pinellas County (FL) Resource Recovery Facility

2001 ◽  
Author(s):  
Joseph K. Robinson ◽  
Pete Stasis ◽  
Mark Schwartz
Keyword(s):  
Potable Water ◽  
Reclaimed Water ◽  
Resource Recovery ◽  
Economic Benefits ◽  
Tampa Bay ◽  
Storm Water ◽  
Makeup Water ◽  
Pinellas County ◽  
Electrical Generation ◽  
The Impact

Abstract The Pinellas County Resource Recovery Facility (PCRRF) combusts 3,150 tons per day of municipal solid waste from Pinellas County, Florida and produces 75 megawatts (MW) of electrical generation capacity. The facility requires about 1.7 million gallons per day (MGD) of makeup water for the cooling tower and up to 200 thousand gallons per day of high-purity water for boiler makeup. The facility currently uses recovered storm water for cooling during summer months (rainy season) and treated municipal wastewater (“reclaimed water”) during the winter months (dry season). The facility currently uses potable water for boiler makeup and is planning to use reclaimed water in the future. Use of reclaimed water for plant water demands is consistent with the philosophy of resource recovery. Reclaimed water, once considered a waste product, is now a valuable resource in water-short areas such as peninsular Florida. Pinellas County’s population of over 1 million people requires water for residential, commercial and industrial purposes. Use of reclaimed water for demands at the PCRRF minimizes the impact on limited freshwater resources and can also build support for the facility among the environmental community. Reclaimed water also has economic benefits. Tampa Bay is experiencing ever-increasing potable water costs. Potable water prices are expected to outpace inflation for the next several years to fund capital improvements associated with the Tampa Bay water program. Reclaimed water is available during the winter season, and the PCRRF has the ability to procure it from two separate sources at competitive rates. During the summer months, the facility depends more on its storm water source. A lime softening pretreatment system processes the storm water prior to its use in the cooling towers. Reclaimed water for boiler makeup will require membrane treatment followed by ion exchange. Microfiltration is being evaluated to remove bacteria-size particles and prevent fouling of the reverse osmosis membranes. Potable water will be used as a backup in the event of availability or quality problems with the reclaimed water supply.

The Impact of the Dioxin Issue On Resource Recovery in the United States

1987 ◽  
Vol 5 (1) ◽  
pp. 381-394 ◽  
Author(s):  
Norman Steisel ◽  
Regina Morris ◽  
Marjorie J. Clarke
Keyword(s):  
United States ◽  
Resource Recovery ◽  
The United States ◽  
The Impact

scholarly journals Improved and promising fecal sludge sanitizing methods: treatment of fecal sludge using resource recovery technologies

2021 ◽  
Author(s):  
Abraham Amenay Zewde ◽  
Zifu Li ◽  
Zhou Xiaoqin
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Resource Recovery ◽  
Rapid Urbanization ◽  
Sanitation Services ◽  
Fecal Sludge ◽  
End Products ◽  
Wastewater Systems ◽  
Treatment Facilities ◽  
The Impact

Abstract The global challenges that face sustainable sanitation services in developing countries are the lack of fecal sludge management; this is due to the rapid urbanization and population growth as it generates enormous quantities of fecal sludge. The extensive use of unimproved sanitation technologies is one of the main reasons for environmental and public health concerns. In dispersed rural areas, isolated slums or in urban areas where a sewerage system is costly, decentralized wastewater system can be used. Therefore centralized management of decentralized wastewater systems along with proper institutional framework treatment of fecal sludge can be used to enhance the economies of developing counties from resource recovery. The discovery of new ways to inactivate pathogens contained in human waste is key in improving access to sanitation worldwide and reducing the impact of conventional waste management processes on the environment. The entire FS management system should include on-site sanitary treatment methods, collection, and transportation of FS, treatment facilities as well as resource recovery or disposal of the treated end products. This review paper addresses the hygienization of fecal sludge and improved treatment technologies for safe reuse or disposal of the end products and the significant economic revenues attained from the treatments of fecal sludge.

Mine Planning and the Crucial Role of Geology

SEG Discovery ◽  
2019 ◽  
pp. 16-27
Author(s):  
Ed Holloway ◽  
Scott Cowie
Keyword(s):  
Best Practice ◽  
Corporate Strategy ◽  
Planning Process ◽  
Mineral Exploration ◽  
Mining Operation ◽  
Early Career ◽  
Mine Planning ◽  
Driver Model ◽  
Mine Closure ◽  
Mining Operations

Editor’s note: The Geology and Mining series, edited by Dan Wood and Jeffrey Hedenquist, is designed to introduce early-career professionals and students to a variety of topics in mineral exploration, development, and mining, in order to provide insight into the many ways in which geoscientists contribute to the mineral industry. Abstract Mine planning is the process that determines the way in which an ore deposit will be mined over the life of a mining operation. It necessarily draws on everything that planning engineers believe will determine the ultimate success of the proposed mine and uses as its foundation all of the geology-related data on the deposit. It is both a strategic and a tactical process that first considers a longer-term horizon based on strategic considerations, followed by more detailed shorter-term planning processes, in this order; the latter are the result of tactical considerations. This structured process may also be referred to as integrated mine planning, and it is driven by a broader corporate strategy or set of objectives. As such, it is much more than the mining engineering section of the mine development process. It has to include inputs from all related disciplines, by combining all of the measured properties of the deposit with mining-associated parameters. This results in the planning process incorporating a significant number of interrelated parameters. If these parameters are not used diligently and accurately or are not well aligned, or if the underlying data are deficient in either quantity or quality, the project or operation is unlikely to achieve its potential, by virtue of failures in the planning process. Best-practice integrated planning incorporates relevant inputs from all mining-related fields: geology, geotechnical, geochemical, hydrogeological, hydrology, mining operations, minerals processing, marketing of product, waste management, tailings, environmental, social science, mine closure, etc. It includes all interfaces in the business-value driver model, from exploration drill holes to the mine closure plan. The planning process cannot be completed successfully by mining engineers working in isolation from professionals in other key disciplines. Because geology provides the foundation on which the mine plan is built, the quality and accuracy of the geologic data provided to planning teams by exploration geoscientists is crucial.

Risk Management Incorporated to Life-of-Mine Planning at Sossego Copper Mine, Carajás, Brazil

2014 ◽  
Vol 805 ◽  
pp. 263-271 ◽  
Author(s):  
Sandro Freitas ◽  
Benevides Aires ◽  
Giorgio de Tomi ◽  
Richardson Agra
Keyword(s):  
Decision Making ◽  
Production Scheduling ◽  
Real Life ◽  
Mine Planning ◽  
Open Pit ◽  
Copper Mine ◽  
Mining Sequence ◽  
Grade Uncertainty ◽  
The Impact ◽  
Production Plans

Open pit mine design and production scheduling deals with the quest for most profitable mining sequence over the life of a mine. The dynamics of mining ore and waste, and spatial grade uncertainty make predictions of the optimal mining sequence a challenging task. Valuation and related decision-making in surface mining require the assessment and management of orebody risk in the generation of a pit design and long term production scheduling. As the most profitable mining sequence over de life of a mine determines both economic outcome of a project and the technical plan to be followed from mine development to mine closure, the adverse effects of orebody risk on performance is critical and are documented in various studies. Ignoring such a consequential source of risk and uncertainty may lead to unrealistic production plans. This paper presented a set of procedures that enable mine planning engineers to carry out a series of analysis, which can be used to evaluate the sensitivity of incremental pit shells and pit designs to grade uncertainty. The results obtained from the analysis have shown to provide valuable information, which can be used to develop mining strategies that are risk resilient in relation to grade uncertainty. A real life application at Sossego copper mine ensure that such procedures are technically implementable, supporting decision-making as (a) in-fill drilling programs; (b) review of mining sequence; (c) identification of areas of upside potential and downside risk and (d) ore blending between mining areas in order to minimize the impact of high risk areas. The goal of this work is to provide an approach for clear risk analysis and management in mine planning cycle to various aspects of pit optimisation and design, resulting in more technically and economically sustainable life-of-mine production plans and mineral reserve depletion.

scholarly journals Towards Water, Sodium Chloride and Natural Organic Matter Recovery from Ion Exchange Spent Brine

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 262
Author(s):  
Maryam Haddad ◽  
Laurent Bazinet ◽  
Benoit Barbeau
Keyword(s):  
Organic Matter ◽  
Ion Exchange ◽  
Heat Loss ◽  
Natural Organic Matter ◽  
Operating Time ◽  
Resource Recovery ◽  
Membrane Distillation ◽  
Ambient Environment ◽  
Regeneration Cycle ◽  
The Impact

Despite the tremendous success of the application of anion exchange resins (IX) in natural organic matter (NOM) removal over conventional removal methods, the considerable amount of brine spent during its regeneration cycle makes its sustainability questionable. This polluting saline stream can be challenging to manage and costly to discharge. Alternatively, and with the recent shift in perception of resource recovery, the produced spent brine can no longer be seen as a polluting waste but as an unconventional source of water, minerals and nutrients. In this research, for the first time, we evaluated the effectiveness of an integrated monovalent selective electrodialysis (MSED) and direct contact membrane distillation (DCMD) system in IX spent brine desalination and resource recovery. Of particular interest were the effects of operating time on the characteristics of the monovalent permselective ion exchange membranes, the impact of the DCMD stack configuration on minimizing heat loss to the ambient environment and the efficacy of the recovered NaCl in the regenerating cycle of the exhausted IXs. Our findings demonstrated that although the recovered NaCl from the stand-alone MSED can restore nearly 60% ion exchange capacity of the exhausted IXs, coupling MSED with DCMD led to minimizing the consumption of fresh NaCl (in the IX regeneration cycle) significantly, the potential application of NOM in agriculture and diminishing the risk of the IX spent brine disposal. In addition, the initial characteristics of the ion permselective membranes were maintained after 24 h of MSED and the transmembrane flux was increased when the feed/hot compartment (in the DCMD stack) was encapsulated on two outer ends with coolant/permeate compartments as a result of less heat loss to the ambient environment.

scholarly journals The social impact of mine closure in the Jiu Valley

2021 ◽  
Vol 239 ◽  
pp. 00004
Author(s):  
Izabella Kovacs ◽  
Sorin Simion ◽  
Alin Irimia ◽  
Ligia Ioana Tuhuţ ◽  
Gheorghe Daniel Florea
Keyword(s):  
Young People ◽  
Social Impact ◽  
Local Population ◽  
Mining Activities ◽  
Mine Closure ◽  
Mining Operations ◽  
Local Society ◽  
The Social ◽  
The Impact ◽  
Impact Of Mining

The impact of transition periods is experienced by the local population and economy as a result of mining activities closure and dismissal of a large number of workers followed by diversification of employment and career reorientation opportunities. The aim of the paper is to highlight the impact generated by closure of mining operations on local society and economy as well as identifying opportunities for harmonious development of communities in the Jiu Valley. Following the assessment of the social impact of mining activities closure, we found a rising tendency of unemployment rate among the middle-aged population that did not benefit from vocational retraining and the growing tendency of young people to leave the region for strictly economic reasons leading to widespread social aging.

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