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2. Greensand - Wikipedia

   en.wikipedia.org/wiki/Greensand

   Greensand (glauconitic sandstone) Occurrence of glauconitic siltstone in the Serra da Saudade ridge, in the Alto Paranaíba region, Minas Gerais, Brazil. Greensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of rounded greenish ...

3. Iron-oxidizing bacteria - Wikipedia

   en.wikipedia.org/wiki/Iron-oxidizing_bacteria

   Iron filters have been used to treat iron bacteria. Iron filters are similar in appearance and size to conventional water softeners but contain beds of media that have mild oxidizing power. As the iron-bearing water is passed through the bed, any soluble ferrous iron is converted to the insoluble ferric state and then filtered from the water.

4. Urinal deodorizer block - Wikipedia

   en.wikipedia.org/wiki/Urinal_deodorizer_block

   Urinal deodorizer block. Urinal deodorizer blocks (commonly known as urinal cakes, urinal cookies, urinal biscuits (or jocularly piscuits ), urinal donuts, toilet lollies, trough lollies, urinal pucks, hockey pucks, toilet pucks, or urinal peons (alternately urinal pee-ons )) are small disinfectant blocks or tablets that are added to urinals.

5. Vermifilter toilet - Wikipedia

   en.wikipedia.org/wiki/Vermifilter_toilet

   Vermifilter toilet. Vermifilter toilet, also known as a primary vermifilter, vermidigester toilet, tiger toilet[ 1][ 2] or tiger worm toilet, [ 3] is an on-site sanitation system in which human excreta are delivered from a toilet (usually by flushing) onto a medium containing a worm-based ecosystem. Faecal solids are trapped on the surface of ...

6. Sand filter - Wikipedia

   en.wikipedia.org/wiki/Sand_filter

   Sand filter. Sand filter used for water treatment. Sand filters are used as a step in the water treatment process of water purification . There are three main types; rapid (gravity) sand filters, upward flow sand filters and slow sand filters. All three methods are used extensively in the water industry throughout the world.

7. Vermifilter - Wikipedia

   en.wikipedia.org/wiki/Vermifilter

   Vermifilter. A vermifilter (also vermi-digester or lumbrifilter) is an aerobic treatment system, consisting of a biological reactor containing media that filters organic material from wastewater. The media also provides a habitat for aerobic bacteria and composting earthworms that purify the wastewater by removing pathogens and oxygen demand ...

8. Aerobic treatment system - Wikipedia

   en.wikipedia.org/wiki/Aerobic_treatment_system

   Aerobic treatment system. An aerobic treatment system ( ATS ), often called an aerobic septic system, is a small scale sewage treatment system similar to a septic tank system, but which uses an aerobic process for digestion rather than just the anaerobic process used in septic systems. These systems are commonly found in rural areas where ...

9. Backwashing (water treatment) - Wikipedia

   en.wikipedia.org/wiki/Backwashing_(water_treatment)

   Backwashing is a form of preventive maintenance so that the filter media can be reused. In water treatment plants, backwashing can be an automated process that is run by local programmable logic controllers (PLCs). The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline ...