Prague Central Wastewater Treatment Plant / Ústrední cistírna odpadních vod Praha (Czech Republic)
N 50° 06.714 E 014° 24.234
33U E 457378 N 5551242
Prague Central Wastewater Treatment Plant (PCWTP; Ústrední cistírna odpadních vod Praha), located on Vltava river at Císarský ostrov (Emperor's Island) in Prague' district Troja, is a principal water treatment facility of Czech capital city Prague.
Waymark Code: WMKFPT
Location: Hlavní město Praha, Czechia
Date Posted: 04/08/2014
Views: 75
Prague Central Wastewater Treatment Plant (PCWTP; Ústrední cistírna odpadních vod Praha), located on Vltava river at Císarský ostrov (Emperor's Island) in Prague' district Troja, is a principal water treatment facility of Czech capital city Prague.
PCWTP, build in 1966, was in the time of its construction one of the largest and the most modern wastewater treatment plants in Europe. PCWTP was enlarged and modernised several times (1980, 1995, 2011) and further complete reconstruction and enlargement started in 2014.
PCWTP is mechanical-chemical-biological wastewater treatment plant using a complex of modern water treatment technologies.
PCWTP removes carbon containing water pollutant by biological way and partially removing the ammonia nitrogen by oxidative denitrification. Phosphorus is removed by precipitation by Fe(III) salts. Technological line consists: several grit, flowing debris and sand catches, primary sedimentation tanks, activation tanks with fine-bubble aerators, rotating biological contactors, regeneration tanks of back-flow sludge. Excessive sludge is after thickening in centrifuges mixed with primary sludge and pumped into tiered digestion tanks temperated to 55 °C. Digested sludge is dried by centrifugation.
PCWTP is producing ca 75 000 t / year of dry aerobic digested sludge for further processing - primarily composting. The digesters are pruducing 20 000 000 m³ / year of biogas (2011), which is used for energy generation. In-house electricity generation from biogas is 35 GWh / year - all of this electricity is consumed directly at the PCWTP. PCWTP is energetically self-sufficient by almost 90%. This was achieved by introducing sludge disintegration in thickening centrifuges, introducing thermophilic aerobic digestion process, improving mixing in digestors and intensive precipitation of the particulate organic matter contained in the incoming wastewater.
The WM coordinates assign the main entrance gate of PCWTP, the plant itself is restricted area - but the best view over the vast PCWTP complex is from nearby hills above Vltava river valley.