Study on the effect of calcium ions on the treatment of aquaculture wastewater by algal, bacteria-membrane combined process

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With the rapid development of aquaculture industry, the problem of aquaculture wastewater treatment has become increasingly prominent. How to treat aquaculture wastewater efficiently and environmentally and reduce its pollution to the environment has become one of the hot spots in the field of environmental research. In recent years, algae-bacteria-membrane combination technology has attracted much attention because of its advantages of high efficiency, energy saving and environmental protection. As an important factor in this process, the effect of calcium ion on the membrane fouling mechanism has attracted extensive attention.

It has been found that calcium ions play an indispensable role in the algae-bacteria-membrane combination process. Firstly, the addition of calcium ions can significantly reduce the rate of membrane contamination. This is because calcium ions can combine with organic matter such as sulfate ions and phosphate ions in wastewater to form insoluble salt precipitates. These sediments are not easy to adhere to the surface of the film, thus reducing the deposition of organic matter on the film, reducing the pollution degree of the film, and extending the service life of the film.

In addition, the introduction of calcium ions also promotes the growth of algae and bacteria. Algae and bacteria are important organisms in wastewater treatment process, they can degrade organic matter in wastewater and purify water quality. Calcium ions provide the necessary nutrient elements for algae and bacteria, promote their growth and reproduction, thereby increasing the biomass in wastewater and improving the efficiency of wastewater treatment.

In addition to reducing membrane pollution and improving treatment efficiency, calcium ions also play an important role in optimizing ion balance in wastewater and regulating water pH value. By regulating the concentration of calcium ions in wastewater, the wastewater treatment system can be optimized and run more efficiently and stably.

The effect of calcium ion on the treatment of aquaculture wastewater by algal, bacteria-membrane combined process cannot be ignored. Through the rational use of calcium ions, we can slow membrane pollution, improve wastewater treatment efficiency, and contribute to environmental protection and sustainable development. This research result provides a new idea and method for aquaculture wastewater treatment technology, and has important practical significance and application value.

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