Thursday, November 8, 2018

Intensive Pond Aquaculture in China

By Feng Ming-Wei, Wu Qiang-Liang, Dong Qiufen, Zhang Song

Intensive Pond Aquaculture (IPA) is a new high-intensive and high-density farming system in China with outstanding advantages and a high construction investment. In this system, water-pushing appliances are put in front of the cell to make static pond water flow through the cell, letting feed waste and fecal matter deposit at the quiescent zone. This is a sustainable farming way which is good for the water recycle, waste clean and aquaculture environment.

 


IPA is mainly composed of the pond, a raceway, water-pushing appliances, waste-removal devices, aeration devices, and other parts. Mostly the cells are set up at one side of the pond and consist of three parts, including the water-pushing cell, culture cell and waste-collection cell.

Generally, the culture cell is 22 metres long, five metres wide and two metres high. The height can be adjusted according to the pond water depth. Micropore oxygen aeration devices are installed at the sides and bottom of this cell to match with the high requirement of dissolved oxygen (DO).

The water-pushing cell is approximately two metres long and the same height and width as the culture cell. The bottom of water-pushing cell is covered by concrete in order to prevent the bottom soil from being sucked up by strong force of water-pushing appliance.

The waste-collection cell is four metres long and constructed at the downstream end of the culture cell with a v-shaped bottom design to slow down the water flow speed and let solid waste to settle down in a so-called quiescent zone. The waste mainly includes feed residual and fecal matter that is sucked up from the bottom, to the pond side and processed after collection.

The water-pushing appliance in front of the culture cell must run continuously to keep the pond water flowing properly, while the micropore oxygen aeration devices that are installed at the sides and bottom of the cell working at the same time to maintain a relatively high DO. Depending upon the culture species and feed type fed into the system, after feeding half an hour the suction devices at the bottom of the waste-collection cell will start working to remove the fecal matter, thus to maintain relative clean water conditions.


Read more HERE.

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