An Automatic and Dynamic Manure Cleaning System for Fish Pond

liftdroveMechanics

Oct 24, 2013 (3 years and 11 months ago)

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1


An Automatic and Dynamic Manure Cleaning System for Fish Pond
1

Tao Xing

Objective

De
sign an automatic and d
ynamic
manure cleaning system for fish p
ond
s
.


Background

Fish pond cleaning is important to keep fish healthy.

Manure and moss that is not removed will clog
tail screens and raise the water level in the raceway. Laminar flow is disrupted and excessive
pressure will break walkways and overflow screens.
Suspending solids will reduce the water quality
and distribute p
athogen. Fish will shy away from feeders while avoiding the cloud of suspended
solids.


Current pond cleaning methods use a combination of “push screen,” “quiescent zone,” and/or
“pumping manure.”
As shown in Figure 1, t
he push screen is made of wire cloth

covering a wooden
frame. Rubber belting across the bottom edge helps it slide on pond floor. The screen is floated up
the pond. Settled manure will slide along the bottom of the pond. Care must be taken not to re
-
suspend the manure.


As shown in Figure 1
, the quiescent zone is made of stand pipes with 4’’
diameter and 4’ tall and common pipes of 6’’ diameter. Various structural supports are constructed
for catwalks and tail screens. Pumping manure is shown in Figure 3.





Figure 1

The method of “push
screen” to clean manure in fish pond





(a)


(b)

Figure
2


Quiescent zone cleaning: (a) geometry, (b) manure siphon hose with head




1

Based on materials provided by Clear Springs Foods, Inc.

and the discuss
ion

between Drs. Tao Xing, Ralph Budwig
and this company during their visit to the fish farms on Aug. 22 2013.

2




Figure 3. Pumping Manure


Project Description

The
labor cost is high using the current cleaning methods. Clear Springs Inc. is looking for new ideas
that lead to an automatic and dynamic manure cleaning system.
The main tasks ar
e, but not limited
to:

1.

Identify the factors that must be considered in designi
ng the new system such as turbulent
level
s
, flow rates, pump selections
, and control system
, etc.

2.

Sketch the
various designs usi
ng SolidWorks.

3.

Develop computational
fluid
models
in EES to evaluate various designs.

4.

Link Engineering Equation Solver (EES) to

Microsoft Excel to create a user
-
friendly
interface in EXCEL.

5.

Perform engineering economy
analysis for each
design
.

6.

Opti
mize the designs to achieve an overall minimum cost.

7.

If fund is available, build a

model
-
scale
prototype to v
erify the
best
design.



Required
Knowledge

This project requires the students to use knowledge they learned from the following courses:
ME 322
Thermodynamics, ENGR

335 Engineering Fluid Mechanics,
ME 345 Heat Transfer, and
ME 435
Thermal System Design.


Computational Tools


EES
that is provided to ME students for free will be used.