Method and device for culturing periphyton

Abstract

The invention discloses a method and a device for culturing periphyton. The method for culturing the periphyton comprises the following steps: (1), preparation of a modified carrier, wherein the carrier more favorable for periphyton adhesion is prepared by modifying agricultural byproducts; (2) periphyton culture, wherein water flow is controlled through a floating valve, nourishment is supplied through drip irrigation, and secondary metabolites of the periphyton are taken away while the nourishment in a periphyton culture tank meets microbial growth, so that the periphyton can be massively propagated; (3) control on a key environmental condition, wherein efficient periphyton culture is realized by controlling growth influence factors of the periphyton. The device is capable of automatically controlling sample introduction and realizing integration of periphyton culture and reaction. The selected materials can be all obtained locally and are low in cost and remarkable in effect; the method is suitable for efficient periphyton culture and provides a scientific basis for promotion of application of the periphyton to the natural water body remediation and agricultural area-source pollution control.

Description

technical field [0001] The invention belongs to the field of ecology and environmental protection, relates to the field of agricultural waste treatment, disposal and resource utilization, and in particular to a method for efficiently cultivating periphytes using modified agricultural solid waste as a carrier, and the invention also relates to a system for cultivating periphytons device. Background technique [0002] At present, China's agricultural by-products are growing at a rate of 5% to 10%, and it is estimated that by 2020, it will reach 5 million tons. The utilization methods of agricultural solid waste in my country can be roughly divided into the following aspects: 1. As industrial raw materials; 2. As animal husbandry feed; 3. As organic fertilizer; 4. As rural living energy; Burn it on the spot. Agricultural by-products that cannot be properly disposed and utilized have caused serious environmental hazards. How to further rationally and fully utilize this kind of...

AI Technical Summary

Problems solved by technology

The weak point of this invention is: the limitation of artificial substrate selection and the various growth factors that do not fully consider the growth of periplexus organisms, thereby fail to improve the biomass of periplexus organisms to the greatest extent

The disadvantage of this invention is that: the biological belt of the biofilm is a non-degradable material, the subsequent treatment is not environmentally friendly, and secondary pollutants may be produced

[0008] A new type of biofilm contact filler (patent publication number: CN104192991A) The invention discloses a novel biofilm contact filler, which includes at least two layers of biofilm, each layer of biofilm has a plurality of obliquely arranged flow channels, and each flow channel is continuous The biofilms are connected to form waves, and both sides of each flow channel are provided with concave and convex grooves; two adjacent layers of biofilms are stacked up and down, and the flow channels between the adjacent two layers of biofilms are intersected; the disadvantages of the invention The disadvantages are: the biofilm cultivated by this invention is dominated by heteroxic microorganisms, with small biomass and a single microbial community structure; in addition, the selected carrier is not environmentally friendly and is prone to secondary pollution

The disadvantage of this invention is that the carrier itself cannot provide nutrients for the growth of periplexus organisms, so the periplexus organisms cultivated have small biomass and unstable community structure.

[0012] To sum up, the current culture method of Zhoucong organisms mainly has the following shortcomings. First, the materials used are not environmentally friendly, and long-term use will produce toxic and harmful substances, or the natural materials used are easily degraded, resulting in a relatively short service life; The second is that some materials with a relatively small specific surface area can cultivate a periplexus with a single structure and unstable properties, which can easily cause shedding, resulting in low biomass and low activity of the periplexus, which cannot meet the engineering requirements; , the designed culture device cannot simultaneously promote the synchronous symbiosis of autotrophic and heterotrophic microorganisms, nor can it form a stable and multifunctional microbial community, let alone form a steady-state micro-ecosystem

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