Cuestionario sobre el tratamiento de agua y parámetros de calidad

Water with a high Total Dissolved Solids (TDS) value will necessarily have a turbidity value. Verdadero. Falso.

If water has high salinity, it will also have high hardness. Verdadero. Falso.

COD is a parameter used to quantify the total organic matter of water. Verdadero. Falso.

The BOD5 test is carried out using chemical oxidizing agents. Verdadero. Falso.

Water turbidity is caused by suspended solids and colloidal particles. Verdadero. Falso.

Hardness, conductivity, and pH are important parameters to control in water destined for industrial use, cooling circuits, and boilers. Verdadero. Falso.

Given a discharge of domestic wastewater, the dissolved oxygen content will be equivalent to that of natural waters. Verdadero. Falso.

Suspended matter in water is removed by coagulation processes followed by filtration. Verdadero. Falso.

Phosphates contained in urban wastewater will be reduced fundamentally in the tertiary stage of a conventional treatment plant. Verdadero. Falso.

Coagulation-flocculation processes decrease water turbidity. Verdadero. Falso.

Within tertiary water treatment, activated carbon is used to remove undegraded organic compounds. Verdadero. Falso.

Facultative lagoons have zones that function under aerobic conditions and others under anaerobic conditions. Verdadero. Falso.

Within lagooning processes, aerobic lagoons are usually very deep to increase the amount of dissolved oxygen. Verdadero. Falso.

An SO2 concentration in air of 2000ppm means there are 2000 cm3 of SO2/m3 of air. Verdadero. Falso.

CFCs are very stable compounds and their bonds break with radiation in the ultraviolet zone. Verdadero. Falso.

Ozone is a tropospheric pollutant. Verdadero. Falso.

Reducing nitrogen content in fuels would significantly decrease atmospheric NOx emission from combustion. Verdadero. Falso.

Activated sludge treatment is fundamentally used to achieve a reduction of biodegradable organic matter in water. Verdadero. Falso.

To remove dissolved salts/ions in water, it is possible to use chemical precipitation methods. Verdadero. Falso.

Sludge treatment serves to stabilize it and reduce its volume for proper management. Verdadero. Falso.

Primary treatment fundamentally serves to remove around 60-70% of suspended solids and around 30-35% of biodegradable matter. Verdadero. Falso.

Low-cost treatments for organic matter removal have the same foundation as conventional urban treatment plants. Verdadero. Falso.

Low-cost treatments fundamentally remove suspended solids and biodegradable O.M. as they are biological methods, only capable of slightly lowering non-biodegradable O.M. Verdadero. Falso.

Primary treatment reduces BOD and suspended solids but not nitrates and phosphates. Verdadero. Falso.

Activated sludge treatment is aerobic, while trickling filter treatment is anaerobic. Verdadero. Falso.

Anaerobic wastewater treatment methods are advisable whenever the water does not have a very high BOD. Verdadero. Falso.

CO2, CH4, and water vapor intervene in the greenhouse effect. Verdadero. Falso.

SOx and NOx are the main causes of acid rain. Verdadero. Falso.

Coal combustion is a cause of acid rain, which does not appreciably occur with natural gas combustion, although both influence the greenhouse effect. Verdadero. Falso.

Colloidal destabilization-coagulation methods can be used for particle removal in gases. Verdadero. Falso.