Where does waste water go1

WHERE DOES WASTE WHERE DOES WASTE WATER GO ?WATER GO ?

ITALY: Maria Valeria AglieriITALY: Maria Valeria Aglieri

CATALONIA (SPAIN): Magalí Ferrusola & CATALONIA (SPAIN): Magalí Ferrusola & Jordi FerrerJordi Ferrer

GERMANY: Jana Schmitter & Anna KlöppelGERMANY: Jana Schmitter & Anna Klöppel

DENMARK: Emmeli SørensenDENMARK: Emmeli Sørensen

UNITED KINGDOM: Joe Steele UNITED KINGDOM: Joe Steele

HUNGARY: Matesz Varga, Bence BangeszHUNGARY: Matesz Varga, Bence Bangesz

WASTE WATERWASTE WATER

• Wastewater is transported into the Wastewater is transported into the sewerage network once the clean sewerage network once the clean water has been used for different water has been used for different purposes in households and purposes in households and businesses.businesses.

• Waste water and rainwater is Waste water and rainwater is transported to various different transported to various different wastewater treatment plants.wastewater treatment plants.

TREATMENT PLANTTREATMENT PLANT

Primary treatment: Primary treatment: SCREENINGSCREENING• The influent sewage water passes through

a bar screen to remove all large objects like cans, rags, sticks, plastic packets etc. carried in the sewage stream..

• The solids are collected and later disposed The solids are collected and later disposed in a landfill, or incinerated.in a landfill, or incinerated.

GRIT REMOVALGRIT REMOVAL• Pretreatment may include a Pretreatment may include a

sand or grit channel or sand or grit channel or chamber, where the velocity chamber, where the velocity of the incoming sewage is of the incoming sewage is adjusted to allow the adjusted to allow the settlement of sand, grit, settlement of sand, grit, stones, and broken glass. stones, and broken glass.

• These particles are removed These particles are removed because they may damage because they may damage pumps and other equipment . pumps and other equipment . Also grit removal makes the Also grit removal makes the water safe to drink.water safe to drink.

FLOW EQUALAZATIONFLOW EQUALAZATION

• Batch discharges of toxic or high-Batch discharges of toxic or high-strength waste might inhibit strength waste might inhibit biological secondary treatment.biological secondary treatment.

FAT /GREASE REMOVALFAT /GREASE REMOVAL

• Fat and grease are removed by passing Fat and grease are removed by passing the sewage through a small tank where the sewage through a small tank where skimmers collect the fat floating on the skimmers collect the fat floating on the surface. surface.

• Air blowers may also Air blowers may also

be used to help.be used to help.

Plant in Spain

Secondary treatment: Secondary treatment:

• Secondary treatment is designed to Secondary treatment is designed to substantially degrade the biological substantially degrade the biological content of the sewage which are derived content of the sewage which are derived from human waste, food waste, soaps and from human waste, food waste, soaps and detergent.detergent.

• They use aerobic biological processesThey use aerobic biological processes

which need oxygen and food to live. which need oxygen and food to live.

Plant in Sicily, Palermo

REUSE WATERREUSE WATER

• Now waste water is clean so it can be Now waste water is clean so it can be use either for:use either for:– Agricultural uses (watering…)Agricultural uses (watering…)– Purification process (for drinking Purification process (for drinking

water…)water…)

THANK YOU !THANK YOU !

DANKE, GRAZIE, GRACIAS, DANKE, GRAZIE, GRACIAS, THANK YOU, KÖSZÖNÖM, TAKTHANK YOU, KÖSZÖNÖM, TAK