Chapter 26: Environmental Microbiology
... • Water can be polluted with • sewage • agricultural runoff • industrial pollutants • Polluted water is high in • organic matter • coliform and noncoliform bacteria • Accumulated phosphates cause algal blooms • The blooms supply nutrients to other microbes, which use up oxygen • Aquatic animals and ...
... • Water can be polluted with • sewage • agricultural runoff • industrial pollutants • Polluted water is high in • organic matter • coliform and noncoliform bacteria • Accumulated phosphates cause algal blooms • The blooms supply nutrients to other microbes, which use up oxygen • Aquatic animals and ...
Ultraviolet Disinfection Systems
... If the water has a noticeable yellow colour it probably contains organic matter derived from peaty soils. The organic chemicals are able to absorb UV light making disinfection less effective. Sometimes increasing the ultra violet light dose may solve the problem. Organic matter can normally be remov ...
... If the water has a noticeable yellow colour it probably contains organic matter derived from peaty soils. The organic chemicals are able to absorb UV light making disinfection less effective. Sometimes increasing the ultra violet light dose may solve the problem. Organic matter can normally be remov ...
Particulate organic material
... clarifiers settle organic materials still in the water. • Secondary Treatment involves using bacteria- such as natural decomposers and detritus feeders to feed on organic matter. Sludge will then be taken from the water and the water will pass through a secondary clarifier tank. ...
... clarifiers settle organic materials still in the water. • Secondary Treatment involves using bacteria- such as natural decomposers and detritus feeders to feed on organic matter. Sludge will then be taken from the water and the water will pass through a secondary clarifier tank. ...
Bacteriological Contamination of Drinking Water
... Filters made from porous ceramic can be used to remove bacteria and viruses. The filter cartridge needs to be replaced every 18 months. As the units reduce water pressure they are normally fitted at a single tap. It is therefore, preferable to install an ultra violet which can treat all the taps in ...
... Filters made from porous ceramic can be used to remove bacteria and viruses. The filter cartridge needs to be replaced every 18 months. As the units reduce water pressure they are normally fitted at a single tap. It is therefore, preferable to install an ultra violet which can treat all the taps in ...
Wastewater Treatment (PowerPoint)
... 3) Clearwater flows over activated charcoal, gravel and sand filters 4) Ammonium Chloride added to kill pathogens ...
... 3) Clearwater flows over activated charcoal, gravel and sand filters 4) Ammonium Chloride added to kill pathogens ...
No Slide Title
... fuel for energy Co-composting -- combined post-consumer waste paper with treated sludge (then decomposed by bacteria) for use as fertilizer for animal crops only Pasteurization - drying sludge in ovens to kill pathogens (treated), then can be made into pellets and sold as fertilizer ...
... fuel for energy Co-composting -- combined post-consumer waste paper with treated sludge (then decomposed by bacteria) for use as fertilizer for animal crops only Pasteurization - drying sludge in ovens to kill pathogens (treated), then can be made into pellets and sold as fertilizer ...
Human Waste Disposal
... Human Waste Disposal More than 500 pathogenic bacteria, viruses, and parasites can travel from human or animal excrement through water. Natural Processes ...
... Human Waste Disposal More than 500 pathogenic bacteria, viruses, and parasites can travel from human or animal excrement through water. Natural Processes ...
Chapter 11-3 Water Pollution - Room N-60
... Water Pollution • Introduction of chemical, physical or biological agents that adversely affect the organisms that depend upon that water ...
... Water Pollution • Introduction of chemical, physical or biological agents that adversely affect the organisms that depend upon that water ...
Occurrence of algae and indicator bacteria in an open drinking
... The fitness of suitability of drinking water for human consumption in South Africa is measured against the national standard SANS 241 for both biological and physico-chemical parameters. Water suppliers aim to produce water that meets this standard in order to comply with the Department of Water Aff ...
... The fitness of suitability of drinking water for human consumption in South Africa is measured against the national standard SANS 241 for both biological and physico-chemical parameters. Water suppliers aim to produce water that meets this standard in order to comply with the Department of Water Aff ...
lp-2-global-issues-and-water-cycle_jan-08.doc
... Microbiology: study of microorganisms Epidemiology (study of the incidence and distribution of disease and prevention) Pathogens- disease causing organisms 2. Pathogens Pathogens- disease causing organisms Microbes are so small they are difficult to see even with an expensive microscope ...
... Microbiology: study of microorganisms Epidemiology (study of the incidence and distribution of disease and prevention) Pathogens- disease causing organisms 2. Pathogens Pathogens- disease causing organisms Microbes are so small they are difficult to see even with an expensive microscope ...
Toxins removal in Water Treatment
... • Most widely used is Hypochlorous Acid (HOCl) made on site • Easily passes through cell membranes to kill bacteria, viruses, and protozoans • Cl2(g) +H2O(aq) HOCl(aq) + HCl • HCl H+ and Cl• Cl gas dangerous to store and handle ...
... • Most widely used is Hypochlorous Acid (HOCl) made on site • Easily passes through cell membranes to kill bacteria, viruses, and protozoans • Cl2(g) +H2O(aq) HOCl(aq) + HCl • HCl H+ and Cl• Cl gas dangerous to store and handle ...
What are Ecosystem Services?
... Water purification occurs when contaminants, such as metals, viruses, oils, excess nutrients, sediment, and debris are removed as water flows through wetlands, forests, and riparian zones. ...
... Water purification occurs when contaminants, such as metals, viruses, oils, excess nutrients, sediment, and debris are removed as water flows through wetlands, forests, and riparian zones. ...
Drinking Water Treatment
... (Advanced) Physical or Chemical Removes specific pollutants left in the water after the first and secondary treatments Could be toxic metals, excess nitrates, fertilizers from runoff ...
... (Advanced) Physical or Chemical Removes specific pollutants left in the water after the first and secondary treatments Could be toxic metals, excess nitrates, fertilizers from runoff ...
Giardia Lamblia
... Ultraviolet light alters the DNA material in cells so that bacteria, viruses, molds, algae and other microorganisms can no longer reproduce. The microorganisms are considered dead, and the risk of disease from them is eliminated. UV Disinfection has an effective kill rate of 99.99% of most living mi ...
... Ultraviolet light alters the DNA material in cells so that bacteria, viruses, molds, algae and other microorganisms can no longer reproduce. The microorganisms are considered dead, and the risk of disease from them is eliminated. UV Disinfection has an effective kill rate of 99.99% of most living mi ...
Non Chemical Water Purification
... Non-Chemical Water Purification Abstract Access to clean drinking water is a challenge for people in many parts of the world. Developing an affordable, non-chemical method would help many people gain access to the water they need to live. Water can be purified in a two-step process where it is first ...
... Non-Chemical Water Purification Abstract Access to clean drinking water is a challenge for people in many parts of the world. Developing an affordable, non-chemical method would help many people gain access to the water they need to live. Water can be purified in a two-step process where it is first ...
Portable water purification
Portable water purification devices – better described as point-of-use (POU) water treatment systems and field water disinfection techniques – are self-contained, hand-carried units used by recreational enthusiasts, military personnel, survivalists, and others for water purification when they need to obtain drinking water from untreated sources (e.g. rivers, lakes, groundwater etc.). These personal devices and methods attempt to render water potable (i.e. safe and palatable for drinking purposes - without disease-causing pathogens).Techniques include heat (including boiling), filtration, activated charcoal absorption, chemical disinfection (e.g chlorine, iodine, ozone, etc.), ultraviolet purification (including SODIS), distillation (including solar distillation), and flocculation. Often these are used in combination.Many commercial portable water purification systems or chemical additives are available for hiking, camping, and other travel in remote areas.