This is proof that the testing program has helped the industry. There may still be some variation. With the growth of the sprout industry came a new industry, the manufacture of sprouting equipment. By now, most bean sprout growers have changed their growing system to one of the newer generation of growing systems. The entire bottom of the bin is an open screen to allow the passage of water and air.
Irrigation is supplied by an overhead spray bar that travels over bean sprout bins.
The irrigation process for bean sprouts has no similarity to the irrigation of alfalfa sprouts. An irrigation cycle may begin every 30 seconds to two hours. The irrigation of a single bin of bean sprouts may take between one to two minutes. That is, it would take one to two minutes for the irrigation spray bar to travel from one end of the bin to the other. The flow rate of the water is between 100 to 150 gallons per minute.