Abstract |
This investigation concerns the behavior of the activated sludge process with respect to the biological solids produced while treating simple, soluble substrates under varying operating conditions. Several small, 0.5 to 2.5 liter, activated sludge pilot plants were operated under various operating situations, and the behavior, especially with respect to the solids resulting from a unit of substrate removed, was noted. Both batch-fed units, simulating conventional activated sludge, and continuously-fed units, simulating complete mixing activated sludge, were studied. |