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  2. Diatomaceous earth filtration - Wikipedia

    en.wikipedia.org/wiki/Diatomaceous_earth_filtration

    Due to the precision of diatomaceous earth filtration; being able to capture dangerous and microscopic particles while maintaining efficiency has allowed D.E. filters to be a highly popularized choice for aquariums, wastewater treatment, food and beverage filtration, and more.

  3. Calcium reactor - Wikipedia

    en.wikipedia.org/wiki/Calcium_reactor

    If the probe detects a low pH level, the pump activates. The bubbles raise the pH by dissipating the CO 2 gas. Since the pH inside the reactor is much lower than the pH in the aquarium, you run the risk of lowering the aquarium pH by running a calcium reactor if that low pH isn't mitigated.

  4. Aquaponics - Wikipedia

    en.wikipedia.org/wiki/Aquaponics

    Aquaponics is a food production system that couples aquaculture (raising aquatic animals such as fish, crayfish, snails or prawns in tanks) with hydroponics (cultivating plants in water) whereby the nutrient-rich aquaculture water is fed to hydroponically grown plants.

  5. Nutrient pollution - Wikipedia

    en.wikipedia.org/wiki/Nutrient_pollution

    Since the agricultural boom in the 1910s and again in the 1940s to match the increase in food demand, agricultural production relies heavily on the use of fertilizers. [3] Fertilizer is a natural or chemically modified substance that helps soil become more fertile. These fertilizers contain high amounts of phosphorus and nitrogen, which results ...

  6. Crop tolerance to seawater - Wikipedia

    en.wikipedia.org/wiki/Crop_tolerance_to_seawater

    ^) The crop performs well (no yield reduction) up to the soil salinity level listed in the table. Beyond that level, the yield goes down. The main difference with the classification published by Richards in the USDA Agriculture Handbook No. 60, 1954 [4] is that the classes are narrower with steps of 2 dS/m instead of 4.

  7. Nixtamalization - Wikipedia

    en.wikipedia.org/wiki/Nixtamalization

    An 1836 lithograph of tortilla production in rural Mexico Bowl of hominy (nixtamalized corn kernels). Nixtamalization (/ ˌ n ɪ ʃ t ə m ə l ɪ ˈ z eɪ ʃ ən / nish-tə-mə-lih-ZAY-shən) is a process for the preparation of maize (corn), or other grain, in which the grain is soaked and cooked in an alkaline solution, usually limewater (but sometimes aqueous alkali metal carbonates), [1 ...

  8. Alkaline precipitation - Wikipedia

    en.wikipedia.org/wiki/Alkaline_precipitation

    Alkaline precipitation occurs due to natural and anthropogenic causes. It happens when minerals, such as calcium , aluminum , or magnesium combine with other minerals to form alkaline residues that are emitted into the atmosphere, absorbed by water droplets in clouds, and eventually fall as rain.

  9. Eutrophication - Wikipedia

    en.wikipedia.org/wiki/Eutrophication

    [17] [18] In marine ecosystems, nitrogen is the primary limiting nutrient; nitrous oxide (created by the combustion of fossil fuels) and its deposition in the water from the atmosphere has led to an increase in nitrogen levels, [19] and also the heightened levels of eutrophication in the ocean.