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WorksheetsPTT375 LAB TEST
Total questions: 10
Worksheet time: 3mins
Pick which glassware you will use to fill in your wastewater sample for the JAR TEST METHOD.
200ml Beaker
1L Volumetric Flask
1000ml Beaker
2L Beaker
For a jar test, initial pH of your wastewater sample was measured at pH6.5. You are required to adjust the pH to pH5.5. What chemical best added into your sample?
Concentrated Sulfuric Acid
Concentrated Sodium Hydroxide
1M Acetic Acid
1M Sodium Hydroxide
Choose the correct setting for JAR TEST METHOD
30rpm for 15min - 20min rest - 80rpm for 1min
80rpm for 15min - 20min rest - 30rpm for 1min
30rpm for 15mins - 80rpm for 1 mins - 20min rest
80rpm for 1min - 30rpm for 15min - 20min rest
In Biological Oxygen Demand (BOD) test, few drops of chemicals were added ONTO the CAP bottle. Name the chemicals
Nitrification Inhibitor
Denitrification Inhibitor
Potassium Hydroxide
Sodium Hydrogen Bicarbonate
Decide the conditions set in the BOD machine
20oC , absence of light, for 5 hour
25oC, absence of light for 5 days
25oC, presence of light, 5 days
20oC, absence of light, 5 days
1. What is the major difference between biological oxygen demand (BOD) and chemical oxygen demand (COD) test?
BOD involve both biological and chemical oxidation process, while COD involve only chemical oxidation process.
Five days are taken for the determination of the BOD and 7 days for COD.
BOD is referring to the biological oxidation is capable of oxidizing dead particulate organic material and organic waste in the water sources, while COD is capable of degrading industrial sewage but cannot measure the oxygen consumption of acetate residue.
BOD is the amount release by bacteria while consuming organic matter under aerobic condition, while COD is the amount of oxygen required for the reduction of total organic matter in water.
What do you understand by the term “second-generation” biofuels?
Biofuels which are currently produced from both plant sugars and oils. These substances make up only a small part of the plant biomass, where the bulk consists of cellulose and lignin.
Biofuels are made from sugar, starch, vegetable oil, or animal fats using conventional technology.
Biofuels which are extracted from unwanted crustacean to obtain chitin active ingredient to process bioethanol production.
Biofuels which are produced from micro-organisms like algae and fungus.
Which of the following is the oxidizing agents used in COD test?
Sulfuric acid
Potassium dichromate
Silver sulphate
Orthophenanthroline ferrous complex
What are the four major operation unit involving for the production of bioethanol from food wastes?
Wastes collection
Pre-Treatment
Hydrolysis
Fermentation
Distillation
What are the factors affecting the production of biodiesel from edible foods?
The availability of food waste
The efficiency of hydrolysis process
The amount of lipid and carbohydrate obtained from food waste
The efficiency of fermentation and transesterification methods
Types of active ingredients presence in the edible foods
