Selective light-transmitting composite film photobioreactor

Abstract

The utility model discloses a selective light-transmitting composite membrane photobioreactor which comprises a selective light-transmitting composite membrane cylinder body, an algae liquid inlet, a nutrient solution inlet and an exhaust port are formed in the top end of the selective light-transmitting composite film barrel; an air vent and a liquid outlet are formed in the bottom end of the selective light-transmitting composite film barrel; the selective light-transmitting composite film barrel body is of a three-layer structure; the outer layer is a light-transmitting hardened film layer, the middle layer is an additive film layer, and the inner layer is a food-grade packaging film layer. According to the utility model, the wall thickness of the cylinder is reduced, the light transmittance is increased, and the material cost is reduced; according to the utility model, the selective light-transmitting composite film barrel is arranged; after being used, the non-damaged paper can be repeatedly used after being sterilized; flow of microalgae is guaranteed through air, no mechanical power exists in the whole culture environment, the pollution risk caused by microalgae death does not exist, and the cleaning and maintenance rate is low.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of microalgae cultivation, especially relates to a selective light transmission composite film photobioreactor. BACKGROUND

[0002] Traditional microalgae cultivation has two types of closed cultivation and open cultivation, for the microalgae such as Haematococcus pluvialis which needs to control the pollution source of cultivation environment, closed cultivation is mostly used, and the prior art closed cultivation is mainly sunlight pipeline type, the pump connects the pipeline head to tail, the flow rate of microalgae in the pipeline is controlled by frequency conversion to obtain sufficient light conditions.

[0003] The high borosilicate glass used in the prior art of sunlight pipeline type has the following shortcomings: large light loss and very high equipment cost; in addition, due to the vertical arrangement of the pipeline, the total length is usually several hundred meters, and the height is several meters, the pipeline resistance is large, a high-lift pump such as a centrifugal pump needs to be selected to transport the algae liquid, while the algae liquid is pressurized by the pump body, the microalgae will be killed to a certain extent, which not only reduces the cultivation capacity, but also may cause pollution; at the same time, the total liquid holding capacity of a single set of sunlight pipeline type is usually several cubic meters, which is difficult to clean, has a long cycle, and has large loss.

[0004] Therefore, the purpose of the utility model is to provide a microalgae photobioreactor with high light transmission rate of liquid receiving material and low pollution risk and no harm to microalgae. CONTENT OF THE UTILITY MODEL

[0005] The utility model solves the technical problem to provide a selective light transmission composite film photobioreactor. The utility model uses a selective light transmission composite film as the liquid receiving material of the photobioreactor, and is made into a single set of liquid holding capacity of several hundred liters and recyclable cylinder type photobioreactor which can be used repeatedly, and the selective light transmission rate of the light beneficial to the growth of microalgae is enhanced; at the same time, the air is introduced to ensure that the microalgae uniformly receive light, and the damage and death of the microalgae caused by the machine are reduced; the photobioreactor is designed as a single set of liquid holding capacity of several hundred liters and recyclable, which is divided into several parts, if pollution occurs inside, the photobioreactor can be replaced completely, and the replaced photobioreactor can be reused after high-temperature sterilization without damage.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A selective light transmission composite film photobioreactor, comprising a selective light transmission composite film cylinder, an algae liquid inlet, a nutrient liquid inlet and an exhaust port are arranged at the top end of the selective light transmission composite film cylinder; a gas inlet and a liquid outlet are arranged at the bottom end of the selective light transmission composite film cylinder;

[0008] The selective light transmission composite film cylinder is a three-layer structure; the outer layer is a light transmission hardened film layer, the middle layer is an auxiliary film layer, and the inner layer is a food-grade packaging film layer.

[0009] Preferably, the wall thickness of the selective light transmission composite film cylinder is ≤0.15mm.

[0010] Preferably, the volume of the selective light transmission composite film cylinder is ≥100 liters.

[0011] Preferably, the auxiliary film layer is an EVA film.

[0012] Preferably, the food-grade packaging film layer is a food-grade PE or PP film.

[0013] Preferably, the selective light transmission composite film cylinder is provided with a lifting hole on the top end side wall.

[0014] Preferably, the selective light transmission composite film photobioreactor is installed in a vertical mode.

[0015] Unless otherwise specified, all parts or materials in the utility model can be obtained by market purchase, and the equipment used in the utility model can adopt conventional equipment in the field or refer to the existing technology in the field.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1) The wall thickness of the selective light transmission composite film cylinder is ≤0.15mm, which reduces the wall thickness of the cylinder, increases the light transmission rate, and can reach up to 95%, and reduces the material cost.

[0018] 2) The volume of the selective light transmission composite film cylinder is ≥100 liters.

[0019] 3) The selective light transmission composite film cylinder is provided, which can be reused after sterilization without damage, and the overall cost is relatively reduced by at least 80% compared with the sunlight pipeline type; the air ensures the flow of microalgae, and there is no mechanical power in the whole cultivation environment, and there is no pollution risk caused by the death of microalgae, and the cleaning and maintenance rate is low. BRIEF DESCRIPTION OF DRAWINGS

[0020] The specific embodiments of the utility model will be further described in detail below with reference to the drawings

[0021] Figure 1 It is a structure schematic view of the selective light transmission composite film photobioreactor of the utility model;

[0022] Figure 2 It is a sectional view of the selective light transmission composite film cylinder of the utility model. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the present application, the present application will be further described below in conjunction with preferred embodiments. It should be understood by those skilled in the art that the following specific description is illustrative rather than limiting, and should not limit the scope of protection of the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first", "second", "third", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] Referring to Figure 1 As one aspect of the present application, the present application is a selective light transmission composite film photobioreactor 100, which comprises a selective light transmission composite film cylinder 1,

[0028] The top end of the selective light transmission composite film cylinder 1 is provided with an algae liquid inlet 2, a nutrient liquid inlet 3 and an exhaust port 4; the bottom end of the selective light transmission composite film cylinder 1 is provided with a vent 5 and a liquid discharge port 6;

[0029] Referring to Figure 2 As shown in the figure, the selective light transmission composite film cylinder 1 is a three-layer structure; the outer layer is a light transmission hardened film layer 11, the middle layer is an auxiliary film layer 12, and the inner layer is a food-grade packaging film layer 13.

[0030] In the present application, the selective light transmission composite film can be selected from existing market public technologies, such as PE composite film and EVA composite film produced by Qingzhou Huasong Plastic Industry Co., Ltd.

[0031] Those skilled in the art can understand that:

[0032] The light-transmitting hard film layer 11 as the outer layer can adopt the existing plastic material with extremely high strength, and the light-transmitting hard film layer 11 can be selected as the protective layer of the selective light-transmitting composite film cylinder 1 (for example, the PET hard film produced by Nanjing Dongchen Electronic Material Co., Ltd., and the ultra-high light-transmitting PET hard film produced by Shandong Zhongneng Optoelectronic Technology Co., Ltd.).

[0033] The auxiliary film layer 12 as the intermediate layer can add different auxiliary agents (for example, auxiliary agent single anti-aging master batch, auxiliary agent rheological agent master batch, and auxiliary agent light splitting ecological master batch) in the EVA film according to the light spectrum requirements of different microalgae and different stages, so that the selective light penetration rate is ensured, and the unsuitable light does not contact the algae liquid.

[0034] The food-grade packaging film layer 13 as the inner layer adopts the food-grade material PE and PP, and the main purpose is to resist corrosion and ensure that the liquid contact material is food-grade (for example, the food-grade packaging film layer 13 can be selected as the PE protective film produced by Nanjing Dongchen Electronic Material Co., Ltd., and the PP film produced by Guangdong Andeli New Material Co., Ltd.).

[0035] The selective light-transmitting composite film cylinder 1 is composed of multiple layers and adds auxiliary agents (for example, auxiliary agent single anti-aging master batch, auxiliary agent rheological agent master batch, and auxiliary agent light splitting ecological master batch) that are beneficial to light penetration: the first beneficial aspect is to facilitate the selective light penetration; the second beneficial aspect is to reduce the wall thickness of the cylinder while ensuring the strength of the cylinder, increase the light transmittance, and the highest light transmittance can reach 95%, and the material cost can also be reduced; the third beneficial aspect is that the overall temperature resistance is increased, and high-temperature disinfection (for example, 115 DEG C) is realized; the whole is divided into parts, and the vertical installation is adopted, the ventilation mode is used to replace the mechanical device to ensure the flow of microalgae, reduce the mortality of microalgae, reduce pollution, reduce the cleaning cycle, and reduce the cost.

[0036] The working principle of the utility model is as follows:

[0037] The algae liquid and the nutrient liquid are injected into the selective light-transmitting composite film photobioreactor through the algae liquid inlet 2 and the nutrient liquid inlet 3, the air is introduced into the selective light-transmitting composite film photobioreactor through the air inlet, the gas generated by photosynthesis is discharged through the exhaust port, and a complete cultivation environment is formed inside.

[0038] According to some embodiments of the utility model, the wall thickness of the selective light-transmitting composite film cylinder is less than or equal to 0.15 mm, so that the light loss rate is less than 5%.

[0039] According to some embodiments of the utility model, the volume of the selective light transmission composite film cylinder is greater than or equal to 100 liters. Using about 10 selective light transmission composite film cylinders can achieve the liquid holding capacity of the existing sunlight pipeline.

[0040] According to some embodiments of the utility model, the light transmission hardening film layer 11 is, for example, a high-hardness hardening film with good light transmission disclosed in CN211942435U. The hardening film has the advantages of high light transmission, high wear resistance, high hardness, and the like through the joint action of multiple structure layers, and has the characteristics of stable adhesion, small water contact angle, high contact sensitivity, and the like.

[0041] According to some embodiments of the utility model, the auxiliary film layer is an EVA film.

[0042] According to some embodiments of the utility model, the food-grade packaging film layer is a food-grade PE or PP film.

[0043] According to some embodiments of the utility model, a lifting hole is arranged on the top end side wall of the selective light transmission composite film cylinder. The lifting hole is arranged to limit the selective light transmission composite film photobioreactor and prevent it from shaking.

[0044] Obviously, the above embodiments of the utility model are merely examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. It is impossible to enumerate all the embodiments here. Any obvious changes or variations derived from the technical solutions of the utility model still fall within the protection scope of the utility model.

Claims

1. A selectively light permeable composite membrane photobioreactor, characterized by, The selective light transmission composite film cylinder includes a selective light transmission composite film cylinder body; The top end of the selective light transmission composite film cylinder body is provided with an algal liquid inlet, a nutrient liquid inlet and an exhaust port; The bottom end of the selective light transmission composite film cylinder body is provided with a vent and a liquid discharge port; The selective light transmission composite film cylinder body has a three-layer structure; the outer layer is a light transmission hardened film layer, the middle layer is an auxiliary film layer, and the inner layer is a food-grade packaging film layer.

2. The compound film photobioreactor according to claim 1, wherein: The wall thickness of the selective light transmission composite film cylinder body is ≤0.15mm.

3. The compound film photobioreactor according to claim 1, wherein: The volume of the selective light transmission composite film cylinder body is ≥100 liters.

4. The compound film photobioreactor according to claim 1, wherein: The auxiliary film layer is an EVA film.

5. The compound film photobioreactor of claim 1, wherein: The food-grade packaging film layer is a food-grade PE or PP film.

6. The compound film photobioreactor of claim 1, wherein: The top end of the selective light transmission composite film cylinder body is provided with a lifting hole.

7. The compound film photobioreactor of claim 1, wherein: The selective light transmission composite film photobioreactor is installed in a vertical mode.

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