"This is done by capturing the bugs in a final settlement tank and returning these to the start of the
activated sludge process, thereby matching the food and bugs to the correct ratio: quite an ingenious process that considerably reduces the footprint of a wastewater treatment process, while having the ability to treat variable loads," he says.
The analysis could not take account of the heavy metals already present in the
activated sludge, which also cannot be taken into account in actual WWTPs.
A high concentration of
activated sludge and rich microbial populations provide a good foundation for the reduction of COD.
Experimental water and
activated sludge: The experimental water was made with glucose as carbon source, N[H.sub.4]Cl as nitrogen source, certain amount of Mg, P, Fe, Ca, and Zn ions as trace nutrients, and sodium azide as inhibitor, following the instructions of pervious research [19].
Tannery wastewater treatment using
activated sludge process system (Lab scale modeling).
Biological sludge was collected from the rubber industry of Shorubber (M) Sdn Bhd in Jejawi, Perlis which has extended aeration
activated sludge plant.
The removal rates of TN and TP ranged from 93% to 95% and 33 - 39% the maximum removal rates obtained at 1.5 h and 2 h respectively In an
activated sludge system nitrogen elements besides organic substrate are used for heterotrophic bacteria growth.
Biological wastewater treatment is based on the principle of biochemical oxidation of contaminants with the biocenosis of
activated sludge. Protozoa and bacteria of
activated sludge as a result of their vital functions perform biochemical oxidation of contaminants, followed by sorption, assimilation, and intracellular oxidation in the nitrification process.
As well it is known rheological measurements may be used as an operational guide or control technique [10] and also to determine the relevancy of rheological parameters as indicators of sludge quality [11]; in particular, hysteresis cycles area was carried out online in aeration tanks of
activated sludge as a way of detecting the appearance of filamentous bulkings and their evolution [12].
Activated sludge process (ASP) is the most commonly used process to reduce the toxicity of waste water by processing it microbiologically.