A treatment process for industrialized seedling rearing water of Apostichopus japonicus for cultivating unicellular algae

Abstract

The invention relates to a process for treating sea cucumber industrial seedling rearing tail water for cultivating unicellular algae. The steps include: real-time collection of tail water discharged from sea cucumber seedlings; starvation treatment for 72 hours of clam worm adults, disinfection with 3.0 mg / L povidone-iodine for 10 minutes, and 0.1 kg / m3 3 Put the amount into the tail water discharged from the sea cucumber seedlings, during the aerated culture, the air volume is subject to the non-floating head of the clamworm; disinfection treatment; neutralization treatment; Bacillus subtilis, yeast, and lactic acid bacteria are prepared in a ratio of 7:2:1 into a mixed preparation, the mixed preparation according to 1.5g / m 3 put into the water body after the neutralization treatment; stand still and extract the supernatant to obtain the water body that can be used for the tertiary cultivation of Unicellular algae. Beneficial effects: the tail water of sea cucumber seedlings is reused for the cultivation of single-celled algae, the waste heat of the tail water is effectively used, and the recycling of heat energy and water resources is realized; the environmental pollution of tidal flats and sea areas caused by the direct discharge of the tail water is reduced; no chemical fertilizers are added Nutrient salts can reduce the harm to aquatic seedlings.

Description

technical field [0001] The invention relates to a process for treating sea cucumber industrial seedling rearing tail water for cultivating unicellular algae. Background technique [0002] The time for raising sea cucumber seedlings is from early January to late May. The natural water temperature in the sea area (taking the sea area of ​​Yantai City, Shandong as an example) during the nursery period: from early January to late May, the water temperature in the natural sea area is 0-20°C. The suitable temperature for unicellular algae commonly used in seawater seedlings is: 6-18°C for Nitzschia minor, 15-25°C for Chrysophyte, and 15-25°C for Phytophthora. From early January to late May, the seawater used to cultivate the above-mentioned bait needs to be heated artificially, which consumes a lot of energy such as natural gas, fuel oil, and electricity; moreover, the tail water produced by sea cucumber seedlings, which contains a large amount of organic matter and suspended par...

AI Technical Summary

Problems solved by technology

From early January to late May, the seawater used to cultivate the above-mentioned bait needs to be heated artificially, which consumes a lot of energy such as natural gas, fuel oil, and electricity; moreover, the tail water produced by sea cucumber seedlings, which contains a large amount of organic matter and suspended particles, is directly discharged into the sea. It will pollute the water environment and aggravate the eutrophication of coastal waters; the traditional chemical fertilizer cultured single-celled algae often have chemical fertilizer residues when fed to aquatic seedlings, which affects the health of the seedlings and causes quality and safety hazards