Essay Biochemical Oxygen Demand (BOD5) and Suspended Solids (SS) – Different Environmental Problems of Using Incinerators – Management Assignment Help

Assignment Task:

Question 1 

The waste contributing steps to tomato processing industry is listed below with quantities and biochemical oxygen demand (BOD5) and suspended solids (SS) values

a) Provide a suitable waste segregation (separation) and treatment scheme 

b) What will be the flow and BOD5 concentration of the combined stream of #4 and #5 

Question 2

Suggest a treatment method for reuse or by-product recovery for the following wastes.

1. Dairy (milk) waste containing whey (protein) material
2. Cutting oil waste coming from metal cutting machines
3. Dye waste from cloth dyeing (textile) industry.

Question 3 

Using the flow diagram given below explain the role of 

i) Filter

ii) Activated carbon

iii) Filter press

iv) Equalization (equalizing) tank.

Question 4 

(a) What are the 2 different environmental problems of using incinerators? How can they be overcome? 

(b) Based on the data provided below, calculate the charges for disposal of the waste with and without recycling at the transfer station, and comment on these costs

Question 5 

A cannery receives on a given day 12 tons of raw produce, 5 tons of cans, 0.5 tons of cartons, and 0.3 tons of miscellaneous materials. Of the 12 tons of raw produce, 10 tons become processed product, 1.2 tons end up as produce waste, which is fed to cattle, and the remainder is discharged with the wastewater from the plant. Four tons of the cans are stored internally for future use, and the remainder is used to package the product. About 3 percent of the cans used are damaged. Stored separately, the damaged cans are recycled. The cartons are used for packaging the canned product, except for 5 percent that are damaged and subsequently separated for recycling. Of the miscellaneous materials, 25 percent is stored internally for future use; 50 percent becomes waste paper, of which 35 percent is separated for recycling with the remainder being discharged as mixed waste; and 25 percent becomes a mixture of solid waste materials. Assume the materials separated for recycling and disposal are collected daily. 

Prepare a materials balance for the cannery on this day and a materials flow diagram accounting for all of the materials. 

Also determine the amount of waste per ton of product.

Question 6 

Calculate the annual cost for the use of rechargeable Nickel-Cadmium AA and compare it to the annual cost for conventional batteries. They are to be used in a portable radio which uses four such batteries. The rechargeable batteries are recharged every month with a solar battery charger, which is not designed to get wet, and which requires two to four days to recharge the batteries depending on the cloud cover. What is the payback time, if any? Other details are as given below:

Question 7 

Fruit canning waste characteristics are given below:

– BOD5: 500mg/L

– COD: 780 mg/L.  

– Suspended solids (after removing the peels and waste fruits): 300mg/L

– pH=3

a) Compare this water quality of this wastewater with that of domestic wastewater (The indicative values are sufficient). 

b) Suggest a treatment system with a short explanation (1 short paragraph is sufficient).