Introduce in detail: What are the advantages of installing Roots blower in fishery farming field?

In fishery culture (especially in high-density, industrial and deep-water culture), Roots blower and micropore aeration have become the mainstream aeration scheme. Compared with the traditional impeller/waterwheel aerator, the advantages are concentrated in: high dissolved oxygen efficiency, uniform whole pool, energy saving and durability, water quality improvement, safety and low noise, and high density adaptation.

I. Aerobic efficiency and advantages of water body coverage (core)

Three-dimensional aeration at the bottom, the fan without dead angle is installed on the shore, and high-pressure air is sent to the microporous aeration tray/pipe at the bottom of the pool through the pipeline, and bubbles emerge evenly from the bottom to realize aeration in the whole water layer. The traditional aerator only stirs the surface layer, which often leads to "oxygen deficiency in the upper layer and oxygen deficiency in the bottom layer". Roots system can make the dissolved oxygen in the bottom layer stable ≥ 5 mg/L.

Micro-bubbles and bubbles with high dissolved oxygen rate are about 1-3mm in diameter, with slow rising, large contact area and long residence time.

Fresh water: The oxygen-increasing efficiency is about 2.6 times that of the traditional oxygen-increasing machine.

Seawater: up to 4.2 times (seawater has lower oxygen solubility and depends more on efficient aeration).

Actual measurement: When dissolved oxygen is increased by 1mg/L, the feed coefficient decreases by 0.1-0.2 and the survival rate increases by 8%-12%.

Deep-water adaptive roots blower is a medium-high pressure blower (usually 30-80kPa), which can easily send air to the bottom of a pond with a depth of 2-4 meters. When the water depth is more than 1.5 meters, the effect is far better than that of the traditional aerator.

Second, energy saving and long-term operating cost advantages

The energy consumption greatly reduces the mass transfer efficiency of high-efficiency three-blade rotor and high oxygen, and the energy consumption of the same air volume is 18%-30% lower than that of the traditional aerator. Actual comparison: the energy consumption of roots blower is about 1/3–1/4 of that of impeller/water wheel type. Example: The 15kW model runs for 24 hours, saving monthly electricity fee ≈400 yuan, and annual saving ≈ 5,000 yuan.

Continuous operation is stable and reliable, simple in structure and easy to maintain, and the high-quality model can run continuously for more than 8000 hours without failure. Suitable for high temperature, night, rainy, high density and other scenes that must be continuously supplied with oxygen for 24 hours to avoid floating head and flooding.

Long life, less maintenance. The special aquatic products are mostly made of anti-corrosion coating/stainless steel impeller, which is resistant to moisture, salt spray and hydrogen sulfide corrosion. The service life is more than 40% longer than that of ordinary fans, and the annual maintenance cost is low.

Third, the advantages of water quality and ecological environment improvement

Strongly improve the bottom material, reduce harmful substances, promote aerobic microorganisms to decompose residual bait and feces;

Reduce the accumulation of ammonia nitrogen, nitrite and hydrogen sulfide

Inhibit anaerobic corruption and reduce the blackening and odor of the substrate.

Reduce the cost of changing water, changing bottom and transferring water.

The convection of water body is uniform, and the water temperature and dissolved oxygen are more stable. The rising of microbubbles drives the upper and lower water layers to circulate slowly, avoiding the stratification of water temperature and dissolved oxygen. Especially for benthic organisms such as prawns, crabs and sea cucumbers, the dissolved oxygen in the bottom is sufficient = high survival rate and few diseases.

Four, aquaculture production and safety advantages

Supporting high density, high yield, stable and high dissolved oxygen is the basis of high density culture. Data: Using Roots micropore aeration, the yield per mu of shrimp pond can be increased by about 30%, and the comprehensive benefit can be increased by 60%+.

Fast growth, low feed coefficient, good quality and sufficient dissolved oxygen → vigorous feeding, good digestion, fast growth and high feed utilization rate. Aquatic products are uniform, vigorous, transport-resistant and sell well.

Safety, low noise and little interference to fish and shrimp.

The motor/fan is all on shore: the motor is driven without water, so as to prevent the risk of electric leakage.

Low noise (equipped with silencer < ＜65dB): the water surface disturbance is small and does not disturb fish and shrimp.

Suitable for shrimp, crab, fry, sea cucumber and other environmentally sensitive varieties.

V. Applicable Scenarios (Fishery Breeding)

Freshwater culture: fish ponds, high-density fish culture and fry cultivation.

Seawater/industrialization: shrimp pond, crab pond, sea cucumber circle, abalone and shellfish culture.

Deep-water pond: standardized pond with water depth ≥ 1.5m.

Factory/circulating water: workshop, sink, barrel culture

Seedling raising/high added value: scenes with high dissolved oxygen requirements and strict water quality control.

Six, a brief comparison with the traditional aerator

Roots blower+micropore aeration

Advantages: uniform whole pool, bottom oxygenation, high efficiency and energy saving, deep water adaptation, low noise and safety, and improved bottom quality.

Suitable for: high density, deep water, factory, seawater, shrimp, crab and sea cucumber.

Impeller/waterwheel type

Advantages: low cost and simple installation.

Disadvantages: surface oxygenation, bottom anoxia, high energy consumption, loud noise, easy to break, and risk of electric leakage.

Suitable for: shallow water, low density and small pond.

summary

The core value of Roots blower in fishery culture is to achieve uniform and high dissolved oxygen in the whole pond → stabilize water quality, reduce diseases, increase density, increase output and save costs with lower energy consumption. It is a standard aerobic equipment for modern, large-scale and high-density aquaculture.