Water purification method for circulating water industrialized aquiculture system and complex bacterial agent thereof

Abstract

The invention provides a method for purifying water quality of a circulating water factory aquacultural system and a composite microbial inoculum thereof. The method is to prepare three microbe composite florae into a unit preparation respectively, wherein a composite flora I consists of 30 to 50 percent of photosynthetic bacteria, 30 to 50 percent of bacillus, and 20 to 30 percent of lactobacillus; a composite flora II consists of 20 to 30 percent of photosynthetic bacteria, and 70 to 80 percent of nitrobacteria; a composite flora III consists of 20 to 40 percent of pseudomonad, 20 to 40 percent of the bacillus, 20 to 40 percent of alcaligenes, and 20 to 40 percent of paracoccus; and the three composite florae are used in the water quality purification treating process of the circulating water factory aquacultural system in working sections according to the proportion that the composite flora I is between 30 and 40 percent, the composite flora II is between 30 and 40 percent, and the composite flora III is between 30 and 40 percent. The florae with beneficial functions are harmonized and compensated with each other, so that high-efficiency degradation of pollutants and water body purification can be realized, the dissolved oxygen content can be improved, pH value can be stabilized, and yielding water can meet the requirement of aquaculture.

Description

technical field [0001] The invention belongs to the technical field of microbial bacterial agents, and in particular relates to a water purification method suitable for circulating water industrial aquaculture systems, and a special composite bacterial agent used in the water purification method. Background technique [0002] China is currently the largest aquatic product farming country in the world, and it is also the only country in the world where aquaculture production exceeds fishing production. The total output of aquatic products in my country accounts for about 35% of the global total, and the aquaculture output of aquatic products accounts for 2 / 3 of the global aquaculture output. In order to avoid polluting the water environment and ensure the healthy and sustainable development of the aquaculture industry, my country's aquaculture industry will transform from a quantitative type to a quality-effective type, and ultra-high-density intensive factory farming is the ...

AI Technical Summary

Problems solved by technology

But these bacterial agents, or function are more single, just only use bacillus class bacterial agent in the patent literature " an ecological method for controlling nitrite in fish and shrimp ponds " (CN ZL200410012759.4); High, such as the nitrifying bacteria agent in the United States, which requires frequent dosing, which is not suitable for the actual production in developing countries; moreover, most of the bacteria agents are not developed for the closed circulation aquaculture system, and the composition and function of the bacteria are not targeted. It is not suitable for the needs of high-density closed recirculating aquaculture system; at the same time, the currently developed purification bacteria often emphasize the NH 4 + removal, while relatively ignoring the NO 3 - Removal, the amount of denitrifying strains in the composition of the bacterial agent is insufficient

In addition, during the operation of the closed recirculating aquaculture system, the pH often drops and becomes acidic. It is necessary to add alkaline substances such as NaOH after the biological filter treatment to increase the pH value and return it to neutral, which increases the operating cost of the system.

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