This course deals with the most used treatments for the textile industry wastewaters, in order to limit the environmental impacts derived from this activity.
The technologies and the equipment to treat air pollution and wastes deriving from the textile industry are also considered.
The program is focused on the processes and plants, in terms of management and constructive aspects, taking into account both the choice criteria among the possible treatment options and the Italian legislation.

Textile industry environmental impacts. IPPC legislation. Wastewater legislation.

Main parameters used to characterized wastewaters, gaseous effluents, and liquid and solid wastes.

Wastewaters: hydraulic-loading rate; organic-loading rate.
Main characteristics of watewaters treatment plants. Pretreatments: screening; sand, grease and oil removal; equalization.
Primary treatment: neutralization; gravity sedimentation. Static and dynamic sedimentation tanks.
Secondary treatment: biological processes to degradate the biodegradable pollutants. Activated sludge plants: characteristics, oxygen requirements, aeration equipments. Trickling filters. Rotating biological contactors. Nitrification-denitrification.
Filtration; adsorption on activated carbon; disinfection.
Sludge treatment: thickening; anaerobic digestion; conditioning; dewatering.

Flocculation/sedimentation of non-biodegradable pollutants in wastewaters. Ultrafiltration; reverse osmosis.

Air pollution legislation.
Dust separation from gaseous effluents. Cyclone separators; filters; electrostatic precipitators.
Treatment of volatile organic compounds (VOCs): activated carbon adsorption, combustion.

Textile industry wastes characteristics and treatments.
Composting: process and plants. Elements of legislation.
Sanitary landfill for solid wastes: environmental impacts; liner systems; leachate and biogas production, recovery and treatments.

Waste incineration legislation.
Incinerators for municipal solid wastes: plant characteristics; energy recovery; flue gas treatments.
Incinerators for industrial solid wastes: rotary drum; fluidized bed; multiple hearth furnace.

Numerical exercises about:

- Gravity sedimentation
- Activated sludge treatment
- Activated carbon treatment for volatile organic compounds
- Combustion of organic vapors in gaseous emissions
- Composting