Final answer:
Aeration and Filtration are alternatives to dispersing gas bubbles in water.
Step-by-step explanation:
Aeration is an alternative to dispersing gas bubbles in water. It involves bringing air into contact with water to exchange certain components between the two phases. Aeration helps in oxygenation and the removal of volatile organic substances, hydrogen sulfide, ammonia, and volatile organic compounds. On the other hand, Filtration is a process that removes dissolved particles, including dust, parasites, bacteria, viruses, and chemicals, by passing water through filters of varying compositions and pore sizes.