A 3 diameter biotower has been designed to treat sewage from 22,000 PE.Influent BOD = 250mg/l and wastewater flow through the primary clarifier removes 35 percent of the BOD and the flows into the biotower the constant r andom media n= 0.44, recycle ratio = 2 and operating temperature =250^0c.

a determine the reaction rate constant k₂₅ if the existing BOD =50mg/l

b what would be the biotower effluent at 20^0c if the recycle ratio is increase to 4

What five items should be tracked or monitored and calculated on the submittal log?

Derive an expression for the factor of safety against slope instability for an infinite slope at an angle ?? from horizontal, and with horizontal groundwater seepage emerging from the slope (and then running off). The soil has a total unit weight ?? and the strength is defined by ??′ and ??′. Assume drained conditions. Define the potential failure plane as being located a distance “??” from the slope surface measured vertically.

Blocks A and B have a masses of 200 kgkg and 250 kgkg , respectively.(Figure 2) The coefficient of static friction between A and B and between B and C is 0.210. The coefficient of static friction between the rope and peg E is 0.520. Pulley D rotates freely, and PPP_2 = 26.0 NN . If θθtheta_2 = 60.0 degreesdegrees , what is the smallest magnitude, TTT, of tension, TTT_evec, that causes block B to move?

Design a staircase for a two story building with the given loads DL = 72 psf and LL= 60 psf. The staircase design must comply with A.D.A. requirements for hospital buildings.

1. With respect to the polymerization process, what is the primary difference
between a thermoplastic polymer and a thermoset polymer? How does this affect recycling?

2. In a typical stress-strain plot of a structural steel, why is the apparent drop-off
in strength after reaching the ultimate value not a realistic portrayal of steel behaviour? Why is
this phenomenon ignored in steel structure design?

• What are the interior design implications regarding the heating and cooling engineering system?
• How are interior designers involved in the design of fireplaces and wood stoves?
• What considerations should affect an interior designer’s specification of a radiantly heated floor, ceiling, or wall?
• How do HVAC system components affect the work of an interior designer?

Well clusters and well nests are commonly used in hydrogeology to collect vertical profiles of hydraulic head and water chemistry.

a) Draw a diagram that shows 3 monitoring wells configured as a cluster of wells. Include the borehole(s), wells, open intervals/sandpacks, and seals.

b) List 3 main disadvantages of a well cluster.

Explain what is cavitation? What is the consequence of cavitation

B) draw the energy line (EL) and the hydraulic grade line (HGL)

1. Define, describe and identify the pros and cons of the following modern construction project delivery methods a) design-bid-build, b) design build c), engineer- procure construct, d. design- CM contracts , e) design-agency CM contracts, f) fast-track construction, g) partnering, h) relational construction/lean project delivery. You may derive your responses from text, Construction Overview posted in Course Documents or other sources with references.

A team of students prepared an oral defense for their design project contained only the following items: a statement of the problem and the final detailed design. What else should they have included?

While writing a design report a team members copies material from the Internet and pastes it into their section of the report. He/she feels that this is important information relevant to the operation of your design. How do you deal with this situation?