by AWWA Research Foundation and American Water Works Association in Denver .
Written in English
|Other titles||Monitoring biofouling in water wells.|
|Statement||prepared by Stuart A. Smith ; sponsored by AWWA Research Foundation.|
|Contributions||AWWA Research Foundation.|
|LC Classifications||TD407 .S66 1992|
|The Physical Object|
|Pagination||xx, 96 p. :|
|Number of Pages||96|
|LC Control Number||93117629|
Manganese and even aluminum biofouling is also found in ground water systems. These biofilms are natural and usually harmless. Natural iron biofouling often acts as a preliminary iron filter in wells and therefore can serve a positive function as well. Biofouling can be a nuisance, however. Oily sheen on the water surface; Reduced well production or efficiency of point-of-use treatment devices; Premature or excessive corrosion of well and plumbing components 2; The characteristic reddish-brown slime or biofilm (biofouling) associated with iron bacteria contamination is a metabolic byproduct from the oxidation of iron or manganese. The recommended procedure for chlorination of a water well: 1. Remove both the pump and pump column. 2. Add the proper amount of bleach to produce concentrations of approximately 1, mg/L (see table 1). 3. Recommended contact time is 24 hours. 4. The well should be agitated every three to four hours using either a surge block or jetting. 5. Several treatment methods may be used to remove iron and manganese from drinking water supplies. This chapter provides an overview of treat-ment options that should be considered for iron and manganese removal and includes guidance regarding selection of treatment methods .
Water Wells - Monitoring, Maintenance, Rehabilitation book Biofouling monitoring methods for preventive maintenance of water wells. View abstract. chapter 9 chapter 11 | 7 pages Monitoring and prevention of iron biofouling in groundwater abstraction systems. View abstract. chapter 12 | 7 pages Diagnostic analysis of well performance. (2) rehabilitating biofouled (or biologically challenged) water wells; and (3) establishing a preventative maintenance (PM) program to ensure a long-term management of the biofouling. Such initiatives thus allow a prolonged life to the water well installation and therefore has potentially very significant economic advantages to the user. oxygen, nitrate, iron, manganese, or sulfate as electron acceptors coincidentally with degradation of the target contaminants. Essentially, the electron donors being added can promote a wide range of microbial metabolic activity that can cause biofilm formation and well biofouling. For. Indications of Iron and Manganese in Drinking Water. In deep wells, where oxygen content is low, the iron/manganese-bearing water is clear and colorless (the iron and manganese are dissolved). Water from the tap may be clear, but when exposed to air, iron and manganese are oxidized and change from colorless, dissolved forms to colored, solid forms.
Well Efficiency Testing (Specific Capacity) Focused water quality testing (Iron; Manganese; Hardness; Biofouling Potential) Well Rehabilitation Methods. Types of methods and specific applications. Quantifying well re-development progress in real time. Cost/Benefit analysis and comparison to well-replacement costs. Break. Forms of Iron and Manganese in Drinking Water. Iron and manganese come in three different forms, which cause the appearance of the water to range from clear to discolored. In deep wells, where oxygen content is low, the iron/manganese-bearing water is clear and colorless because the iron and manganese are dissolved. The amount of water going through the well system will drop significantly if several holes or portions of the screens are clogged. Calcium carbonate, silt, clay, iron sulfides, and iron and manganese bacterial “biofouling”, a combination of sediment and deposits, are all common well cloggers. The two most common methods to rehabilitate a water well are: Major forms of incrustations can occur from build up of calcium and magnesium salts, iron and manganese compounds, or plugging caused by slime producing iron bacteria or other similar organisms (bio-fouling). Treating iron bacteria colonies in water wells is often a perpetual.