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  2. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    where TDS is expressed in mg/L and EC is the electrical conductivity in microsiemens per centimeter at 25 °C. The conversion factor k e varies between 0.55 and 0.8. [5] Some TDS meters use an electrical conductivity measurement to the ppm using the above formula. Regarding units, 1 ppm indicates 1 mg of dissolved solids per 1,000 g of water. [6]

  3. Conductivity (electrolytic) - Wikipedia

    en.wikipedia.org/wiki/Conductivity_(electrolytic)

    Thus in the past, megohm-cm was used, sometimes abbreviated to "megohm". Sometimes, conductivity is given in "microsiemens" (omitting the distance term in the unit). While this is an error, it can often be assumed to be equal to the traditional μS/cm. Often, by typographic limitations μS/cm is expressed as uS/cm.

  4. Source-separated organics - Wikipedia

    en.wikipedia.org/wiki/Source-separated_organics

    A resident adds kitchen food scraps to yard debris in a roll cart as part of the community's source separated organics (SSO) program. Source-separated organics (SSO) is the system by which waste generators segregate compostable materials from other waste streams at the source for separate collection.

  5. Windrow composting - Wikipedia

    en.wikipedia.org/wiki/Windrow_composting

    Windrow turner used on maturing piles at a biosolids composting facility in Canada. Maturing windrows at an in-vessel composting facility.. In agriculture, windrow composting is the production of compost by piling organic matter or biodegradable waste, such as animal manure and crop residues, in long rows – windrow.

  6. Aerobic digestion - Wikipedia

    en.wikipedia.org/wiki/Aerobic_digestion

    Aerobic digestion is a process in sewage treatment designed to reduce the volume of sewage sludge and make it suitable [1] for subsequent use. [2] More recently, technology has been developed that allows the treatment and reduction of other [3] organic waste, such as food, cardboard and horticultural waste.

  7. Here’s the last day to send your gifts in time for the holidays

    www.aol.com/last-day-send-gifts-time-143042135.html

    US Postal Service employees work inside the Los Angeles Mail Processing & Distribution Center on December 3. The facility is currently processing 1 million packages per day.

  8. 10 Vintage Salt and Pepper Shakers That Are Surprisingly Valuable

    www.aol.com/10-vintage-salt-pepper-shakers...

    Listing price on eBay: $2,500 There were countless Japanese-made, cartoon-like ceramic figurines made during the 1950s, and some of the most valuable (and collectible) are vintage salt and pepper ...

  9. Florida man stabbed ex-girlfriend 70 times ahead of domestic ...

    www.aol.com/florida-man-stabbed-ex-girlfriend...

    He had been driving 100 miles per hour and lost control of the car, local outlets reported. Lindsey was last arrested on Nov. 6 for an attack on Stevens and charged with domestic violence battery.