Progress on In-situ Remediation Technologies of Aquaculture Pond Water

Abstract

As a major aquaculture country, China ranks the first in terms of aquaculture scale and production in the world. Pond aquaculture is the most important aquaculture model in China, playing important roles in ensuring the supply of high-quality animal protein, promoting agricultural efficiency, and increasing farmers' income. However, with the continuous intensification of aquaculture and increase in aquaculture density, high feed input and animal excretion have led to serious eutrophication of aquaculture pond water. Excessive ammonia nitrogen and nitrites not only pollute the aquaculture water, but also seriously endanger the health of aquatic animals, leading to a series of problems such as frequent diseases, drug abuse and food safety, posing serious challenges to the green and sustainable development of aquaculture. Hence, it is urgent to treat and remediate the water body of aquaculture pond. At present, the remediation techniques for aquaculture water mainly include in-situ remediation and ectopic remediation. Compared with ectopic remediation, in-situ remediation has the advantages of saving resources, low cost and no cross contamination, exhibiting a broad application prospect. On this basis, first, this review summarizes the main sources, characteristics and hazards of water pollutants in aquaculture ponds in China. Second, the research progress of in-situ remediation technologies in aquaculture ponds in China is summarized from three aspects of physical, chemical, and biological treatment technologies, and the technical principle, application scope, application effect, advantages and disadvantages are also elaborated. Finally, the main problems in the in-situ remediation of aquaculture ponds are proposed, the future research direction is prospected, and a single pond circulation ecological aquaculture model is put forward, which will provide references for future research and application of aquaculture pond water remediation.

Keywords

• aquaculture
• pollutant
• in-situ remediation
• sustainable development
• single pond circulation
• microorganism