"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.
In this paper, Cuckoo Search Algorithm will be adapted and applied to parameter identification of a hybrid linear model which describes the dynamics of an activated sludge
process for wastewater treatment .
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 .
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
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  and also to determine the relevancy of rheological parameters as indicators of sludge quality ; 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 .
process (ASP) is the most commonly used process to reduce the toxicity of waste water by processing it microbiologically.