Recently, in Ninghai County Sanmen Bay modern agricultural development zone, a batch of new “shrimp pond” has been put into use. This batch of “shrimp ponds” are indoor, no need to dig holes, but on the ground to build a breeding ponds, a tail of South white shrimp in about 28℃ of constant temperature water freely cruising —— this is the full digital white shrimp integrated research and development project breeding base. Through the digital platform, the HP value, ammonia nitrogen, dissolved oxygen, temperature, salinity and other data of the shrimp pool can be viewed in real time.
White shrimp aquaculture, sewage is the key, it is an important indicator of water safety, directly linked to income. Ninghai County actively cultivates digital prawn cultivation projects, changes the development mode of agricultural technology, and provides a model for the development of green agriculture. In the traditional mode, aquaculture tail water, residual bait and excrement will have a certain impact on the Marine ecological environment. However, the aquaculture project under the digital support adopts internal industrial circulation treatment to realize circulating aquaculture. The relevant person in charge of Ningbo Yuanfang Technology Co., LTD., which is responsible for the operation and construction, said that the aquaculture water is returned to the aquaculture pool through three-level precipitation, sand filtration, protein separation, biochemical treatment and other links to realize the recycling of the aquaculture water. In addition, the digital recycling aquaculture model can reduce 800 tons of aquaculture manure and residual bait, reduce sewage discharge by 95%, water recycling utilization rate of more than 80%, and save 2.85 million tons of aquaculture water.
Digital prawn breeding project relying on information, the Internet of things, 5G technology, integrated use wisdom digital farming equipment, through the installation at the scene of a variety of sensors, controllers, realize environmental parameters collection, automatic data analysis, automatic control and disease early warning, and other functions, create the best breeding environment, greatly improve the breeding efficiency, reduce the mortality of breeding shrimp. At the same time, according to the sensor collection of shrimp farming activity, feed intake, weight, yield, such as the change of the data, establish the prawn growth curve, food curve, activity curve, weight curve, build environmental monitoring, feed feed system, achieve accurate bait, effectively solve the problem of traditional breeding blind feeding, and then reduce the breeding waste from the source. The whole workshop is covered with polyurethane insulation material, and the water body is only reduced by 0.1℃ a day, which can greatly reduce the fuel consumption of biomass boiler and achieve energy saving and emission reduction.
In order to promote the planting and breeding cycle, the base actively expands the new path of resource utilization of breeding waste. On the basis of the construction of 32500 square meters of digital breeding workshop, the planting and breeding circulation greenhouse 5000 square meters, vegetable base greenhouse 1700 square meters and fruit garden 1800 square meters. Pneumatic timing discharge valve installed in shrimp aquaculture pond, using the rotation of aquaculture water pollution effect, timing will pool center gathered feces, residual bait discharge to tail water tank, artificial dig again after disinfection, exposure treatment is used as organic fertilizer, used for western sea bamboo shoots planting, form a complete shrimp vegetable symbiotic system, ensure the efficient recycling comprehensive utilization of breeding waste.
Waste heat recovery is another feature of green breeding technology. In the process of workshop sewage discharge and sewage treatment, the base will also promote waste heat recovery. In winter, the water in the breeding pool is heated to 28℃ needed for the growth of shrimp. In order not to waste excess heat energy, the new water will be heated to 25℃ through heat exchange during the water outlet. The system will be completed in June of this year.”The modern shrimp breeding mode of the Internet of Things + circulating water + fully automated mode has the advantages of accurate control of production environment quality, inputs and production quantity and quality.”The relevant person in charge of the research and development project said that the model can greatly improve the utilization rate of land and resources, and effectively reduce the amount of waste production, which is conducive to ecological environment protection, and help Ningbo to create a” waste-free city “.
(Source: Ningbo Municipal Science and Technology Bureau)