You have been appointed as an environmental engineer in a refinery plant operating in south africa which produces various different types of waste. suggest two (2) methods of 4.1 waste management for each type of waste produced: 4.1.1 sludge produced as a byproduct from the process. (2) (2) 4.1.2 sewage from the bathrooms and change-house. (2) 4.1.3 waste from the canteen such as food, plastics, cans, etc. unacceptable forms of waste management for rubber material from old tyres? (i. e. (2) 4.1.4 what methods should not be used to manage rubber material from old 22 chp3601/101/0/2019 2. describe the process of condensation as a mechanism for cleaning air; include in your (10) explanation a description of the two types of condensers. 4.3. a 3.0 x 105 cm3 sample of air was found to contain 15 ug of no2. the temperature and pressure were 21°c and 102.421 kpa when the sample was taken. 4.3.1 what was the no2 concentration in ppm (molecular weight of no2 46 g/mol)? (5) 4.3.2 is the level of no2 in the air sample higher or lower than the allowable range for people and animals? (2) 4.3.3 state the harmful effects of no2 gas on people and animals