Chemical Characteristics of Water Flashcards
What is NOM removal in water done through?
- Coagulation
- Filtration
- Dissolved Air Floatation
- Adsorption, Oxidation, Ion Exchange
What are the three types of organic compounds found in wastewater?
- Carbohydrates
- Proteins
- Fats
How is biodegradation of organic waste achieved?
Using bacteria and other biological organisms capable of metabolizing the organic compound
Biodegradation in the presence of oxygen is known as?
Aerobic process
Biodegradation in the absence of oxygen is known as?
Anaerobic process
Why is organic matter in wastewater effluent regulated?
If organic matter is too high, microorganisms in the receiving waters will consume the organic material, utilizing dissolved oxygen, which depletes the available dissolved oxygen for aquatic life
What is BOD?
It is a measure of how much organic material is in the wastewater plant effluent calculated by the amount of oxygen used by microorganisms in the oxidation of organic matter
If more organic matter is stabilized more oxygen is utilized, true or false?
True
What does the rate constant K depend on?
- Nature of the waste
- Type of organism present
- Temperature
What is the typical K value for domestic wastewater?
0.2/day to 0.3/day
BOD increases with higher temperature, true or false?
True
What are the typical values for theta?
1.135 (4 to 20 deg C)
1.056 (20 to 30 deg C)
Nitrification increases BOD in a wastewater sample, true or false?
True
What is the standard temperature used for laboratory tests?
20 deg C
What is Chemical Oxygen Demand (COD)?
It measures the oxygen equivalent of the organic matter in the presence of acid (chemical) and heat
