www.deloachindustries.com Open in urlscan Pro
2606:2c40::c73c:6702  Public Scan

Form analysis
0 forms found in the DOM

Text Content

This website stores cookies on your computer. These cookies are used to collect
information about how you interact with our website and allow us to remember
you. We use this information in order to improve and customize your browsing
experience and for analytics and metrics about our visitors both on this website
and other media. To find out more about the cookies we use, see our Privacy
Policy.

If you decline, your information won’t be tracked when you visit this website. A
single cookie will be used in your browser to remember your preference not to be
tracked.

Accept Decline


PISCICULTURE - AQUA FARMING

 * Home
 * About Us
 * Services
   
   * Field Services
   * Manufacturing Services
   * Pisciculture Services
   * Design Services
 * Capabilities
   
   * Aqua Farming/Pisciculture
   * Water Treatment Systems
   * Wastewater
   * Odor Control
   * Water Treatment
 * Products
   
   * Iron Oxidation-Aerators
   * CO2 Removal-Decarbonators
   * H2S Removal-Degasifiers
   * Odor Control-Scrubbers
   * Filtration-Filters
   * AI-Controls
   * Full Product & Service List
 * Resources
   
   * Aqua Farming/Pisciculture Guide
   * Industrial Water Treatment Guide
   * Odor Control & Air Emissions Guide
   * Training Videos
 * Blog
 * Contact
 * Our Partners
   
   * American Water Works Association
   * DHP Training
   * International Desalination Association IDA
   * Water Surplus
   * WefTec
   * Haynes Equipment


 PISCICULTURE - AQUA FARMING

“Oldest most respected Pisciculture, Water and Wastewater manufacturer in the
USA".

The Aqua Farming Market

Aqua farming or as some refer “aquaculture”, "mariculture" or even
"pisciculture" is already a major business outside of the United States with
China, India, and Vietnam being the top three producers and the United States
being the smallest.  The growth is being fueled with the rapid demand for
seafood within the US as well as the need for high quality protein on a global
basis.  The US imports an estimated 86% of their seafood for consumption and it
is estimated that only half of that is wild caught. The majority of the seafood
produced around the world is done so in some type of aquaculture industry.  From
a variety of fish to crustaceans, mollusks, aquatic plants, and algae they are
all becoming a major industries around the world and it is estimated by the food
and agriculture industry that aquaculture is growing at a rate three times
faster than the land based agriculture markets. 

The term aqua farming is a broad term when discussing the commercial operations
of growing and harvesting aquatic species for profit or survival. The term
“mariculture” specifically refers to performing aqua farming in the sea. 
Normally mariculture utilizes fish nets to capture the fish species and fish
pins to allow them to grow and be harvest along shore lines.  The term
pisciculture is specific to aqua farming or the raising of fish inside of tanks
or in house ponds.  All of these types of aqua farming and industries are
growing at an accelerated rate to meet demand. 

Aqua farming has seen an average growth rate of 28% annually and it has quickly
become recognized not only as a need to provide the vast quantities of food
resources for an expanding population but also as a major industries offering
high potential profits.  Major investors have now moved into the space of aqua
farming and the aquaculture market has become a commercially controlled industry
with large corporations moving into the space to expand their market share and
further develop the techniques and technologies.

Shortcuts:

 * Aqua farming is not new
 * Salt Brackish-Fresh water 
 * Acid VS Alkalinity 
 *  Temperature Control
 * Disinfection of Water 
 * Major Species 


AQUA FARMING WITH WATER TREATMENT TECHNOLOGIES

Aqua Farming Is Not New

it has been around for thousands of years and many cultures have depended on
obtaining their resources from the sea or from man made water structures. 
Everything from fish farming to the growing of rice is a version of aqua farming
and millions of people every day outside of the USA depend on aqua farming in
order to feed their families.

With the expansion of the industry and the commercialization of aqua farming
many products like salmon, catfish, and tilapia just to name a few comes the
need to improve the technique and technologies in order to improve the rate of
the harvest as well as the quality of the product.  Safety and the need to meet
more stringent regulations which exist in the US also plays a major role in the
commercial aqua farming business.  High standards are placed on the aqua farms
to assure that commercially grown and harvested products are free from all
contaminants, disease, and harmful bacteria that might endanger public safety. 
The need to control disease and bacteria is a major focus in the aquaculture
industry because if it occurs it can quickly spread to all other tanks or ponds
causing major losses and increased risks.  Now with the United States entering
the market place in aqua farming and with additional globalization occurring at
a rapid rate the land base aquaculture business operations and investments are
outpacing the wild caught production. 

Salt-Brackish-Fresh Water

DI designs and builds “degasification” and “decarbonation” air stripping tower
systems along with pressure filtration systems and disinfection systems like
U.V. light systems operating at 254 nm.   DI can remove hydrogen sulfide (H2S),
carbon dioxide (CO2), ferrous iron (Fe+), calcium carbonate (CaCO3) and
manganese (Mg).  In addition DI can provide total control over pH, total
suspended solids, and total dissolved solids to assure high purity of water. 
When water purification is required by reverse osmosis or membrane filtration DI
can provide a full complete package system with flow rates expandable into
millions of gallons per day. 

Often the water for seawater aqua farming is either pumped from the sea or it is
obtained from the installation of brackish water wells with water quality levels
ranging from 20-25,000 TDS or if placed closer to the sea levels can reach
35,000 TDS.  One way water is treated and safeguarded in the aqua farming
process is to pump the water to a treatment location where first the pH is
properly adjusted.  If the water is from the sea or a brackish water well from
the Florida region or Caribbean it may contain higher than normal levels of
sulfur or hydrogen sulfide (H2S) which is a naturally occurring contaminant but
can be detrimental to fish products that normally grow in other parts of the
world where the water is without these conditions. The water is first injected
with an acid like sulfuric to adjust the pH to a 5 or 5.5 level which lowers the
alkalinity as shown in the graph below.  This will convert the sulfides into a
hydrogen sulfide gas where it can then be removed thru a process called
degasification.  The degasification process removes the hydrogen sulfide by
using an air stripping process where the pressures are altered within the
degasification tower.  The science behind the process is based from “Henry’s
Law” which states that “dissolved gas is proportional to its partial pressure in
the gas phase” and the proportionality factor is called the “Henry’s law
constant”.

Acid vs. Alkalinity

In addition to removing the hydrogen sulfide the degasification process will
also strip and remove the carbon dioxide (CO2) and the pH will rise 1-1.5
levels.  If removing iron in addition to hydrogen sulfide and carbon dioxide the
pH is often adjusted to 7 and after the oxidation process is complete within the
degasification towers DeLoach Industries recommends post filtration through a
series of pressure filters that they manufacture.  This will remove the oxidized
iron to a level of 15 microns.  If additional filtration is required DeLoach
Industries offers polishing filtration down to as low as 0.5 microns why still
maintaining the same level of salinity for the aquatic sea life without adding
harmful chemicals.  Different acids have different values and strengths as shown
below in the table.



When aqua farming fresh water species the use of other technologies such as
carbon filtration can be used to remove other forms of contaminants and
impurities.  Carbon absorption increases the operational cost because of the
need to regularly replace or regenerate the carbon which is why it is not the
most economical method of water treatment for aquaculture and should only be
utilized in the final phase of treatment after the bulk of all contaminants have
been removed more economically through degasification and filtration. 

 

Temperature Control

Many aqua farm species require temperature control much like any type of
agriculture greenhouse requires temperature control.  Depending on the desired
seafood products to be aqua farmed and the location of the aquaculture facility
the water temperature might require altering by either raising it or lowering
it.  If the aqua farm is producing a cold water species fish than land based
commercial operations will utilize chillers to lower the water temperature
unless the water is being extracted in a cold climate location.  In Florida most
aqua farm processes that are growing cold water species fish utilize chillers to
cool the water.  If the aquatic species that is being raised for market requires
warmer water than the use of heat pumps or solar thermal and heat exchangers can
be utilized to control the incoming or recirculating water. To remove excess
heat, cooling towers or degasification towers can be utilized to lower
temperatures.  Most aqua farm operations experiment with temperature control and
lighting in hopes of accelerating growth rates which are predicated on feeding
habits of the species in lieu of the addition of adding hormones which has been
traditionally done outside of the US.  In addition the solubility of carbon
dioxide in water varies as the temperature changes as shown in the graph below. 

 

Disinfection of Water

The need to safeguard aquaculture species from bacteria requires some type of
disinfection procedure that will not have any negative or harmful impacts on the
aquatic life that is being aqua farmed.  The most effective and recommended
method by DeLoach Industries is to utilize ultraviolet to treat and prevent
bacteria within the water process.  The initial feed water should be treated to
kill harmful bacteria spores that are smaller than 0.5-1.0 micron or if
polishing filtration is not being performed.  This will initially assure that
you are not introducing bacteria into the beginning of the aquatic process.  It
is also important to safeguard the water and tanks if the aqua farming is being
conducted on land in man made tanks or lined ponds.  With unlined ponds the risk
of bacteria and disease increase dramatically due to many variables that cannot
be controlled such as the accumulation of the waste products.  In addition, open
uncovered tanks and ponds are susceptible to contamination birds and other forms
of wildlife that may come into contact with the aqua farming process.  The tanks
and ponds must be kept clean to prevent the formation of harmful bacteria and
disease that can quickly spread to the other tanks or ponds if left untreated. 
The use of closed in aqua farming processes provides better control conditions
to safeguard against the introduction of bacteria and disease and properly
designed farms allow for the quick isolation of tanks should one become infected
with a bacteria or disease safeguarding the other tanks and aquatic life. By
utilizing U.V. (Ultraviolet Light) at a 254 nano-meter wave strength you can
treat the incoming or recirculating water without the introduction of harmful
chemicals.  It is best to take these extra precautions first on the incoming
water and also on any recirculating water systems.  When it is possible having a
straight through single pass flow system is ultimately the best way to help
prevent the introduction of bacteria and spread of disease. 

Major Species

Top 15 cultured fish species by weight in millions of tons, according to FAO
statistics for 2013 [1]

Species

Environment

Tonnage (millions)

Value (US$, billion)

Grass carp

freshwater

5.23

6.69

Silver carp

freshwater

4.59

6.13

Common carp

freshwater

3.76

5.19

Nile tilapia

freshwater

3.26

5.39

Bighead carp

freshwater

2.90

3.72

Catla (Indian carp)

freshwater

2.76

5.49

Crucian carp

freshwater

2.45

2.67

Atlantic salmon

marine

2.07

10.10

Roho labeo

freshwater

1.57

2.54

Milkfish

freshwater

0.94

1.71

Rainbow trout

freshwater, brackish, marine

0.88

3.80

Wuchang bream

freshwater

0.71

1.16

Black carp

freshwater

0.50

1.15

Northern snakehead

freshwater

0.48

0.59

Amur catfish

freshwater

0.41

0.55

 

For more assistance or information on safeguarding your water or purification of
the water contact the professionals at DeLoach Industries Inc. at 941-371-4995. 
They can assist you in every aspect of water purification and can recommended
the best available process for your particular aqua farming operation.


ARE YOU PLANNING OR ENGINEERING A PROCESS WATER OR WASTEWATER PLANT?

 

Contact a professional at DeLoach Industries today!
   

818 Cattlemen Rd, Sarasota, FL 34232 | (941) 371-4995

Website Design and Inbound Marketing by

Copyright 2022. All Rights Reserved