A Physicochemical Combination Process Based on the Recycling and Reuse of Chlorella Aged Liquid

Abstract

The invention belongs to the technical field of water treatment, and in particular relates to a physicochemical combination process based on recycling treatment of aged chlorella liquid, comprising the following steps: A. pumping the aged chlorella liquid into an ozone reaction tank, adding hydrogen peroxide, and Selectively oxidize and decompose the inhibitory components such as fatty acids and other organic substances that affect the normal growth of chlorella in the aging solution, and retain the remaining nutrient salt ions; B. Pump the aging solution treated in step A into the coagulation sedimentation tank, and add self-made new organic ‑Inorganic composite flocculant, mixing and stirring, removing sediment, and further removing algae-inhibiting organic substances in the aging solution; C. The aging solution treated in step B enters the medium nutrient salt online monitoring and replenishment system, and monitors the consumption of algae in the algae culture solution online There are more nutrients such as iron and potassium ions, and other nutrients are negligible due to small changes during the cultivation process, and these nutrients are added to the treatment solution to the concentration level of the original formula to realize the circulation of the aging solution after treatment Breeding Chlorella.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a physicochemical combination process based on recycling treatment of aged chlorella liquid. Background technique [0002] Chlorella has important economic value and is widely used in food, medical care, health care, chemical raw materials, environmental protection, energy and other fields. Therefore, the chlorella aquaculture industry has developed rapidly in recent years. However, large-scale chlorella cultivation needs to consume a large amount of pure water and nutrients, and the multiple reuse of chlorella culture fluid is a common farming method used by enterprises. Due to the generation and accumulation of a large number of metabolic intermediates such as saturated long-chain fatty acids and other organic substances in the process of continuous reuse of chlorella, and become growth inhibitors of chlorella, the chlorella culture solution ages rapidly and...

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Problems solved by technology

[0004] The biological method to treat the aging liquid of chlorella culture is greatly affected by environmental conditions, the treatment period is long, and it is easy to cause bacterial pollution in the process of algae culture; in recent years, chemical methods such as advanced oxidation and physical methods such as activated carbon adsorption and membrane separation have been used in wastewater. The application of treatment is becoming more and more widely. The treatment process of this kind of method is relatively simple and the treatment speed is fast. It is a beneficial choice for the recycling and reuse of aging liquid. However, this kind of method has certain limitations when used alone, such as low utilization efficiency and difficult regeneration. , high processing costs, and strong selectivity of reactions with organic matter, etc., so it is necessary to improve this kind of physical and chemical technology and improve and effectively combine it to achieve selective and efficient purification and recycling of Chlorella aging liquid

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