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These definitions were explained in a simple way, to make easy for non-technical reading or to facilitate understanding of the main text by people familiarized with these terms without much explanation of what I have to "say".  If you have any correction or suggestion to do, please send me a message

Biohydrometallurgy   Branch of biotechnology dealing with the study and application of the economical potential of the interactions between the microbial world and the mineral kingdom. It concerns, thus, all those engaged, directly or indirectly, in the exploitation of mineral resources and in environmental protection: geologists, economic geologists, mining engineers, metallurgists, hydrometallurgists, chemists and chemical engineers. Along with these specialists, there are the microbiologists whose work is indispensable in the design, implementation and running of biohydrometallurgical processes (Rossi, G. 1990)
Bioleaching   It is the microbial solubilization of metals used to recover them from ores or sludge.
Biological treatment of Residues   There are two main ways of treating residues biologically: Aerobic treatment and anaerobic treatment. In both cases, the treatment process allows good proliferation of microorganisms able to degrade organic matter present in these residues, minimizing the impact in the environment.
Domestic wastewater   Liquid efluent originated from domestic use of water (Bathromm, kitchen, etc) 
Environmental auditing   Mechanism of requirements verification of the environmental standards in relation to technical aspects, procedures or legislation. 
Environmental Management System   The part of the overall management system that includes organizational structure, planning activities, responsibilities, practices, procedures, processes and resources for developing, implementing, achieving, reviewing and maintaining the environmental policy (ISO 14001 First edition)
Environmental microbiology   It could be logical to consider Environmental microbiology as a branch of Microbiology, but I believe it is too restrictive and limited. So I prefer to consider as an area of interaction between these two science disciplines that studies the interaction of microorganisms with the environment. 

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Environmental statement   It is a document elaborated by the company that has to be comprehensive and available to the public. It has to specify the company issues related to the environment and be externally verified by an independent auditor. 
Heavy metals   Heavy Metals: Metallic elements with high atomic weights, i.e., mercury, chromium, cadmium, arsenic, and lead; can damage 
living things at low concentrations and tend to accumulate in the food chain. Heptachlor: An insecticide that was banned on 
some food products in 1975 and all of them 1978. It was allowed for use in seed treatment until 1983. More recently it was 
found in milk and other dairy products in Arkansas and Missouri where dairy cattle were illegally fed treated seed
Industrial sewage   Liquid efluent originated from industrial use of water. 
Land farming   A disposal process in which hazardous waste deposited on or in the soil is degraded naturally by microbes. 
Sanitary landfill   Place  destinated to the final disposal of sludge or other hazardous residues. It has several precautions to avoid water table or any water body contamination. 
Sludge   Residue originated from the biological treatment of residues 
Sludge drying bed   Place destinated to dehydrate sludge coming from the Biological treatment plant by evaporation. It is a temporary armazenation. 
Ground Water   The supply of fresh water found beneath the Earth's surface, usually in aquifers, which supply wells and springs. Because ground water is a major source of drinking water, there is growing concern over contamination from leaching agricultural or industrial pollutants or leaking underground storage tanks.
     
     

 
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