Page 18 - Agricultural innovation

Figure 3. Equipments of
shrimp pond
Source: My Lan Group

Shrimp ponds are also equipped with LED lights to increase the time for shrimp to eat industrial
food to help shrimp grow quickly.
The mangrove reserve is planted with 20,000 mangrove trees in combination with fish farming,
helping to decompose organic waste in wastewater discharged from shrimp ponds. Water from the
mangroves is pumped to the inlet, treated and reused for shrimp farming. The mangrove forest is
capable of sequestering 246 tons of CO .
2
The roof of the preliminary processing area is fitted with a solar battery with a capacity of 642,142
kWh/year with 500kWp. Each kWh of electricity in Vietnam emits 0.52 kg of CO . Thus, this solar
2
battery system can reduce emissions of 335 tons of CO /year.
2
The smart devices in the model are connected to the internet via LoRa and 4G networks
manufactured by RYNAN Technologies Vietnam Company in Tra Vinh City.
Shrimp production at this farm can range from 240 tons to 300 tons/year. The production of fish
harvested from the mangroves is about 40–50 tons/year. Producing each ton of shrimp requires about
2,400 kWh of electricity and 3,000 m of water at use from mangroves.
3
Conserving mangroves, increasing energy efficiency with oxygen technology instead of aeration,
shrimp farming that combines algae and fish farming, and using solar cells, can increase shrimp
production on arable land and achieve zero CO emissions.
2
The key point of this model lies in the very small and detailed application and innovation that will
affect productivity, production costs and the environment. The first difference is the change of the
water circulation system, replacing the turbulent flow into laminar flow to reduce the loss of dissolved
oxygen. At the same time, the familiar aerators in traditional shrimp ponds were replaced by oxygen
generators (which bring pure oxygen into the water so that dissolved oxygen is at a higher concentration
than saturated). As a result, if until now, people could not raise shrimp in an oxygen environment of
more than 7.6 mg/L, with this technology, shrimp can now be cultured at concentrations of 12, 13, 14
or even 20 mg/L, a higher dissolved oxygen concentration is also fine.
Normally, just raising shrimp at an oxygen concentration of 8 to 14 mg/L, shrimp is already very
healthy, less sick. Moreover, because no aeration technology is used, instead of having to use up to
5,500 kWh/ton shrimp, the electricity consumption will be about 2,500 kWh/ton shrimp or less. With
the use of laminar water circulation system, it does not break shrimp feces and leftovers into very small
solid particles suspended in the water, so it is easy to collect into the siphon system out of the pond,
thereby saving money and lots of water. This model has also cared for better suit the behavior of the

Agricultural Innovation Review in CLV Countries 11