Method for reducing total nitrogen and total phosphorus in water of prawn culture pond

Abstract

The invention discloses a method for reducing total nitrogen and total phosphorus in water of a prawn culture pond, and belongs to the field of aquaculture sewage treatment. The method comprises the steps of reasonable supplement of microalgae in a prawn culture pond, matching of the prawn culture pond and a shellfish culture pond and water circulation, fixation of a micro-ecological preparation in the shellfish culture pond and reasonable supplement of a carbon source in the shellfish culture pond, and the content of total nitrogen and total phosphorus in culture water can be effectively reduced through water circulation. The method is easy to operate and can meet the requirements of aquaculture tail water discharge standards, and has good environmental protection value and market application prospect.

Description

technical field [0001] The invention relates to the technical field of aquaculture sewage treatment, in particular to a method for reducing total nitrogen and total phosphorus in the water quality of prawn breeding ponds. Background technique [0002] At present, in the process of prawn culture in open-air ponds, monoculture (prawn) and polyculture (prawn and shellfish, prawn and fish, and multiple species of prawn) are mainly used. During the culture process, microalgae can absorb and utilize the water body through photosynthesis Inorganic nitrogen and inorganic phosphorus, thereby reducing inorganic nitrogen and inorganic phosphorus in the water body. Shellfish can reduce the number of microalgae in the water body through filter feeding, which can reduce the total nitrogen and total phosphorus in the water body, or filter-feeding fish can also achieve Reduce the effect of total nitrogen and total phosphorus. This method relies on the action of microalgae, although it has ...

AI Technical Summary

Problems solved by technology

This method relies on the action of microalgae, although it has a certain effect on the reduction of inorganic nitrogen and inorganic nitrogen, but in cloudy days or when the temperature drops, after the action of microalgae is reduced, the total nitrogen and total phosphorus in the system are very difficult. reduce

In addition, although microecological preparations can reduce total nitrogen and total phosphorus in water to a certain extent, microecological preparations require a large amount of carbon sources to maintain activity, and the feasibility of investing a large amount of carbon sources in large water bodies is low, and large water bodies The content of total nitrogen and total phosphorus in the medium is not high, and the cost performance of adding probiotics is very low

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