The heated by industrial processes water is usually performed within a cooling tower via trickling filter
. This is where it runs over the surfaces in drop form.
The treatment processes include primary treatment (includes Imhoff tank, trickling filter
, and secondary clarifier), aerobic sludge digestion, one 1.25 acre 7 million gallon capacity secondary treatment,
Hermanson, 2006."Vertical distribution of nitrifying populations in bacterial biofilms from a fill-scale nitrifying trickling filter
"If you have a highly concentrated population of tilapia, you could re-circulate the water in the system which is going through a trickling filter
," he said.
The Walvis Bay Municipality contracted Aqua Services & Engineering to upgrade existing stone-media biofilters to the company's flagship trickling filter
technology, for improved waste water treatment.
A year monitoring campaign was set up in one of the beds (March, 2011, and March, 2012), including the measurement of flow rate (in flow and out flow of the plant, tricking filter inflow) and the collection of weekly samples (one single sample by week, during 57 weeks) in four points: influent and effluent and two samples in inlet and outlet of trickling filter
to determine the total nitrogen (TN), ammonia nitrogen (N[H.sub.4]-N), and nitrate nitrogen (N[O.sub.3]-N).
She said that initial lab-scale studies have proved that Constructed wetlands, Dual digestion system and Trickling filter
system technologies can be treat domestic wastewater to such an extent that it can be used for irrigational purposes.
Overgrowth of bacteria leading to 'channelling' is an issue with common market process designs such as submerged aerated filters (SAF), rotating biological contactors (RBC) or trickling filter
and anaerobic digestion were ineffective at removing E-13 and E-6.