sludge
131Aerobic granulation — The biological treatment of wastewater in the waste water treatment plant often accomplished by means of the application of conventional activated sludge systems. These systems generally require large surface areas for implantation of the… …
132List of Captain Planet episodes — The following is a list of episodes from the animated Captain Planet franchise. The series was the second longest running cartoon of the 1990s, producing 113 episodes. The final 13 episodes of the show were only shown in Europe, and never in the… …
