Ripple bottle

Ripple bottle

Ripple bottle consumes large amounts of oxygen. For every lb of BOD oxidized, 1 lb of O2 is used.

For every lb of ammonia oxidized, 4. 6 lb of O2 are used. In order for uninhibited nitrification to occur, a working DO level is 2. Nitrifying bacteria do not compete well against heterotrophic bacteria for D. This condition is easily achieved in the final cells of a lagoon system. The longer detention time, the more likely nitrification will occur. Activated sludge plants are able to nitrify in 6 – 48 hours.

Nitrification is enhanced at higher pH’s. 5 is ideal although nitrifying bacteria can adapt outside of this range. Alkalinity is also consumed at a rate of 7. Sufficient alkalinity must be present to buffer the acids produced during nitrification. The arte of nitrification is greatly influenced by temperature.

As the temperature increases, the nitrification rate increases. Temperature of greater that 20C up to about 35C enhance nitrification. Nitrification slows down dramatically or may stop altogether at around 5 degrees C. A sufficient population of nitrifying bacteria must be present in order to nitrify. These bacteria are attached growth organisms, meaning that they must attach themselves to the surface of an object. In an activated sludge plant, the surface is a floc particle.