PROBLEM TO BE SOLVED: To decompose and remove efficiently and simultaneously harmful nitrogen such as nitrate nitrogen or ammoniacal nitrogen contained in each waste water, when waste water containing nitrate nitrogen and waste water containing ammoniacal nitrogen exist separately.SOLUTION: In a removal...
Before that, chemicals such as borax, ammonia and lye were the most common bleaches in the U.S., and bleaches made using chlorine were generally too expensive to manufacture until the 20th century. Clorox Chemical, later called the Clorox Company, first gave samples of bleach to consumers fo...
Within the 2.3-acre plant, which smells lightly of ammonia, giant rotating spindles turn steaming-hot septic sludge and biosolids from local wastewater treatment plants into what an engineer calls “poop crepes.” Giant scrapers then deposit the baked biomatter onto a combination conveyor belt and d...
3) Ammonia nitrogen, phosphorus and heavy metals in water are difficult to remove and energy is wasted. It is necessary to rationally regulate water quality, and strive to develop new processes to improve the treatment effect of coating wastewater, such as systematic management of high-salt...
But the biggest problem of all is harnessing enough energy simply to get a spaceship off the ground. That is where rocket engines come in. Rocket Image Gallery Rocket engines are, on the one hand, so simple that you can build and fly your own model rockets very inexpensively (see the lin...
The first reports on the presence of pharmaceuticals in wastewater and natural water were published in 1977–1978 (Hignite and Azarnoff1977; Cardoso et al.2014). Since then, knowledge of the sources, fate and ecotoxicology of pharmaceuticals has started to advance. It has been well confirmed tha...
The next wastewater treatment plant process is the primary treatment. Its main goal is to use gravity and continued physical processes to remove solids from the wastewater. During primary wastewater treatment, the pretreated water collects in primary clarifiers. The wastewater sits for a while so fu...
introduce. For example, many agricultural fertilisers contain ammonia, nitrogen and phosphate in order to optimise crop yields. However, when these chemicals are allowed to infiltrate streams, rivers, lakes and the suchlike, they can disrupt the delicate balance that is necessa...
as does detergent runoff in wastewater. Excessive phosphates and nitrates stimulate growth in algae and other green plants, and when these plants die, they drift to the bottom of the lake or other body of water. There, decomposers consume the remains of the plants, and in th...
While in orbit, only one oxygen-nitrogen system is used to pressurize the orbiter. During launch and landing, both systems of each gas are used. Five loops of fans circulate the atmosphere. The circulated air picks up carbon dioxide, heat and moisture: Chemical carbon dioxide canisters remove ...