Method for treating seaculture wastewater by marine polysaccharide dual-component flocculant

Abstract

The invention discloses a method for treating seaculture wastewater by a marine polysaccharide dual-component flocculant, and belongs to the technical field of wastewater treatment. The method comprises the steps as follows: with chitosan and sodium alginate as raw materials, respectively preparing a chitosan component and a sodium alginate component, and respectively adding the chitosan component and the sodium alginate component into the wastewater so as to prepare the marine polysaccharide dual-component flocculant for treating the wastewater. The method particularly comprises the steps as follows: firstly, adding the chitosan component with the concentration of 1-1000 ppm into the wastewater, stirring for 5-10 min at a rotation speed of 400-500 rpm; and secondly, adding the sodium alginate component with the concentration of 1-1000 ppm into the wastewater, continuously stirring for 5-10 min at the rotation speed of 400-500 rpm, flocculating and settling to purify the wastewater. According to the method, natural active matters of marine organisms are utilized, the prepared marine polysaccharide dual-component flocculant treats the seaculture wastewater according to different proportions, the culture water quality can be improved, the discharged wastewater can be purified, the purified water quality index fully meets the safety culture level, and the clean culture and the harmless production are realized.

Description

technical field [0001] The invention relates to a method for treating wastewater, in particular to a method for treating marine aquaculture wastewater with a marine polysaccharide two-component flocculant, which belongs to the technical field of wastewater treatment. Background technique [0002] With the improvement of people's living standards and consumption levels, their demand for protein has also increased, which has increased the demand for seafood such as fish and shrimp as one of the main sources of protein, which has brought about a The rapid development of marine aquaculture. With the rapid development of the mariculture industry, especially the continuous growth of the industrial mariculture industry, a series of negative problems have been brought about: the disorderly discharge of a large amount of aquaculture wastewater has caused the deterioration of water quality, frequent occurrence of diseases, and the pollution of aquaculture pollutants. Sedimentation c...

AI Technical Summary

Problems solved by technology

With the rapid development of the mariculture industry, especially the continuous growth of the industrial mariculture industry, a series of negative problems have been brought about: the disorderly discharge of a large amount of aquaculture wastewater has caused the deterioration of water quality, frequent occurrence of diseases, and the pollution of aquaculture pollutants. Sedimentation can also cause eutrophication of the water body, leading to a serious imbalance, disorder, or even collapse of the ecosystem in the cultured sea area, which greatly affects the production safety of farmed fish, shrimp and shellfish and other seafood; it is precisely these factors that greatly affect the Restricting the mariculture industry itself to develop in a healthy and sustainable direction

However, combined with the current flocculant treatment technology for aquaculture wastewater, the traditional inorganic salt flocculant treatment effect is not ideal, and some chemically synthesized flocculants are often unsafe and easy to cause secondary pollution and are limited. Microbial flocculation Although the agent has the advantages of safety, non-toxicity, no secondary pollution, and biodegradability, it still has high cost, long fermentation and cultivation time, and long microbial precipitation and flocculation time when it is used to treat mariculture wastewater. It is not suitable for industrialization and large-scale production. Not enough

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