Waste Management

Question 1

A waste management hierarchy arranged from most desirable to least desirable options for managing livestock wastes.
a. disposal-minimization-treatment-reuse
b. minimization-reuse-treatment-disposal
c. treatment-reuse-minimization-disposal
d. reuse-disposal-treatment-minimization
e. treatment- minimization-disposal-reuse

Answer 1

b. minimization-reuse-treatment-disposal

Question 2

A low cost type of biogas system using polyethylene plastics as the digester chamber.
a. attached film
b. covered lagoon
c. complete mix
d. tubular polyethylene
e. sequential batch

Answer 2

d. tubular polyethylene

Question 3

It refers to management techniques applied to reduce the pollution load coming from animal
farms.
a. treatment
b. disposal
c. transport
d. utilization
e. storage

Answer 3

a. treatment

Question 4

The reduction of insoluble organic and complex soluble organic compounds to simple soluble
organic compounds.
a. acidogenesis
b. methanogenesis
c. hydrolysis
d. acetogenesis
e. volatilization

Answer 4

c. hydrolysis

Question 5

5. An earthen basin in which wastewater containing settleable solids is retained to remove a part of
   suspended matter by gravity.
   a. sedimentation basin
   b. clarifier
   c. septic tank
   d. settling pond
   e. both a and d

Answer 5

e. both a and d

Question 6

Recommended carbon-nitrogen ratio for livestock waste composting.
a. 30:1
b. 1:30
c. 60:1
d. 10.1
e. 1:15

Answer 6

a. 30:1

Question 7

Bacteria which can carry out metabolic activities including reproduction in the presence or
absence of free elemental oxygen.
a. anaerobic
b. aerobic
c. thermophilic
d. mesophilic
e. facultative

Answer 7

e. facultative

Question 8

The volume of the reactor divided by the volumetric flow rate.
a. organic loading rate
b. stoichiometric demand
c. hydraulic retention time
d. solids retention time
e. settling period

Answer 8

c. hydraulic retention time

Question 10

Manure having a total solids content not exceeding five percent.
a. solid
b. semi-solid
c. liquid
d. slurry
e. both b and d

Answer 10

c. liquid

Question 11

Production of compost in piles which are mechanically turned to achieve aeration.
a. windrow
b. compost bins
c. in vessel
d. static piles
e. vermicomposting

Answer 11

a. windrow

Question 12

Average methane composition in biogas is:
a. 80 % b. 40 % c. 90 % d. 30 % e. 60 %

Answer 12

e. 60 %

Question 13

Portion of the total solid that passes through the filter in a filtration procedure.
a. Volatile solids
b. Suspended solids
c. Dissolved solids
d. Fixed

Answer 13

b. Suspended solids

Question 14

An act providing for an ecological solid waste management program, creating the necessary
institutional mechanisms and incentives, declaring certain acts prohibited, providing penalties
appropriating funds therefore, and for other purposes.
a. RA 9004
b. RA 8749
c. RA 9275
d. RA 1019
e. RA 9003

Answer 14

e. RA 9003