阅读说明：本技术 一种生物膜毯填料及其制备方法和应用 (Biological film blanket filler and preparation method and application thereof ) 是由 邱珊 徐善文 赵立军 袁木 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种生物膜毯填料及其制备方法和应用,属于水处理技术领域；所述生物膜毯填料的原料按重量份计包括：二苯基甲烷二异氰酸脂75～85份、聚醚多元醇15～25份、发泡剂15～20份、催化剂0.5～1份、泡沫稳定剂0.5～1份、扩散剂0.5～1份及微生物活性激发剂2～3份；按照重量份称取各原料并混合、发泡,之后击破闭孔即得所述生物膜毯填料,其负载的微生物活性激发剂能有效促进微生物繁殖,使其具有高生物量；同时由于其具有连通多孔结构,使其在水处理过程中不易堵塞,并显著提高了传质效率,从而提高了水处理效率,且其具有稳定性强,抗冲击能力强,处理效果稳定的特点,适用于各种生活污水以及工业废水的处理。(The invention discloses a biomembrane blanket filler and a preparation method and application thereof, belonging to the technical field of water treatment; the biomembrane blanket filler comprises the following raw materials in parts by weight: 75-85 parts of diphenylmethane diisocyanate, 15-25 parts of polyether polyol, 15-20 parts of a foaming agent, 0.5-1 part of a catalyst, 0.5-1 part of a foam stabilizer, 0.5-1 part of a dispersing agent and 2-3 parts of a microbial activity activator; weighing the raw materials according to the weight parts, mixing and foaming, and then breaking the closed pores to obtain the biomembrane blanket filler, wherein the supported microbial activity excitant can effectively promote the propagation of microorganisms so as to ensure that the biomembrane blanket filler has high biomass; meanwhile, the water treatment device has a communicated porous structure, so that the water treatment device is not easy to block in the water treatment process, and the mass transfer efficiency is obviously improved, so that the water treatment efficiency is improved.)

1. The biomembrane blanket filler is characterized by comprising the following raw materials in parts by weight: 75-85 parts of diphenylmethane diisocyanate, 15-25 parts of polyether polyol, 15-20 parts of a foaming agent, 0.5-1 part of a catalyst, 0.5-1 part of a foam stabilizer, 0.5-1 part of a dispersing agent and 2-3 parts of a microbial activity activator.

2. The biofilm carpet filler of claim 1, wherein said polyether polyol is at least one of polyether propylene glycol and polyether glycerol.

3. The biofilm blanket filler of claim 1, wherein said foaming agent is CaCO₃And the catalyst is one or more of dicumyl peroxide, triethanolamine, triethylene diamine and triethylamine, the foam stabilizer is organic silicon, and the diffusant is ethyl cellulose.

4. The biofilm blanket charge of claim 1, wherein said microbial activity stimulator is one or more of an oxide of iron or manganese, cobalt, nickel, tourmaline and an active bio-enzyme preparation.

5. The biofilm carpet filler of claim 4, wherein said active bio-enzyme preparation is at least one of a hydrolase enzyme, a catalase enzyme.

6. The biofilm blanket packing of claim 1, wherein said biofilm blanket packing is further sewn with a film blanket fixing material.

7. The biofilm blanket packing of claim 1, wherein two ends of the biofilm blanket packing are sewn with rings made of terylene.

8. The preparation method of the biofilm carpet filler as recited in any one of claims 1 to 7, characterized by comprising the following steps: weighing the raw materials according to the weight parts, mixing, foaming, and breaking closed pores to obtain the biomembrane blanket filler.

9. The method of claim 8, wherein the closed cells are breached by igniting a mixture of air and hydrogen.

10. Use of a biofilm carpet filler according to any of claims 1 to 7 in water treatment.

Technical Field

The invention belongs to the technical field of water treatment, and particularly relates to a biofilm blanket filler as well as a preparation method and application thereof.

Background

In the field of sewage treatment, the Moving Bed Biofilm Reactor (MBBR) process plays a very important role, the basic principle of the MBBR process is a biofilm process, the advantages of complex metabolism of microorganisms in activated sludge are fully utilized, and the defects of the traditional activated sludge are overcome. The microorganism is fixed on the specific filler, which is a great characteristic of the MBBR process, so that the microorganism is fully contacted with the sewage, and the treatment efficiency of pollutants in the sewage is accelerated.

Environmental researchers in various places at present start solving the problems encountered in the MBBR process from multiple aspects, so as to seek more efficient and economical sewage treatment methods, such as a reactor, a process flow, microorganism reinforcement and the like, and the biological filler can organically combine microorganisms and fully contact sewage. In the prior MBBR process, the difficult problem that the fluidized filling material is easy to block exists, and the biomass on the biological filling material is insufficient, so that the process is limited in practical application, and therefore, the microorganism fixing technology taking the biological filling material as the core is paid sufficient attention.

In conclusion, the biomembrane blanket filler which can keep high biomass, has high mass transfer efficiency, low cost and good effect is developed, and the sewage treatment efficiency can be effectively improved.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a biomembrane blanket filler and a preparation method and application thereof.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides a biomembrane blanket filler which comprises the following raw materials in parts by weight: 75-85 parts of diphenylmethane diisocyanate, 15-25 parts of polyether polyol, 15-20 parts of a foaming agent, 0.5-1 part of a catalyst, 0.5-1 part of a foam stabilizer, 0.5-1 part of a dispersing agent and 2-3 parts of a microbial activity activator.

Preferably, the polyether polyol is at least one of polyether propylene glycol and polyether glycerol.

Preferably, the foaming agent is CaCO₃And the catalyst is one or more of dicumyl peroxide, triethanolamine, triethylene diamine and triethylamine, the foam stabilizer is organic silicon, and the diffusant is ethyl cellulose.

Preferably, the microbial activity stimulant is one or more of iron or manganese oxide, cobalt, nickel, tourmaline and active biological enzyme preparation.

Preferably, the active biological enzyme preparation is at least one of hydrolase and catalase.

Preferably, the biological membrane blanket filler is also sewn with membrane blanket fixing materials.

The membrane blanket fixing material is a polyester fabric tape which is in a strip shape and symmetrically sewn on the surface of the biological membrane blanket filler.

The biomembrane blanket filler fixing material is a terylene woven tape, the width of the terylene woven tape is 3-4cm, and the biomembrane blanket filler fixing material has the characteristics of difficult corrosion and durability.

Preferably, the two ends of the biomembrane blanket filler are sewn with rings made of terylene materials.

The biofilm blanket filler is made into a tapestry form, so that the biofilm blanket filler is convenient to mount and dismount, and the problem of difficult filling of the filler in the existing moving bed biofilm reactor is solved; and the tapestry form can better prevent the filler from being blocked and improve the mass transfer efficiency.

The invention also provides a preparation method of the biofilm blanket filler, which comprises the following steps: weighing the raw materials according to the weight parts, mixing, foaming, and breaking closed pores to obtain the biomembrane blanket filler.

Preferably, the closed pores are broken by igniting the air and hydrogen mixture.

The invention also provides application of the biofilm blanket filler in water treatment.

Compared with the prior art, the invention has the following beneficial effects:

the invention is realized by adopting diphenylFoaming and breaking closed pores by taking methyl methane diisocyanate, polyether polyol, a foaming agent, a catalyst, a foam stabilizer, a dispersing agent and a microbial activity excitant as raw materials to obtain the biomembrane blanket filler which is loaded with the microbial activity excitant and has a communicated porous structure, wherein the pore size is 26-30 meshes, the porosity is 94-97%, and the density of the biomembrane blanket filler is 25-35 kg/m³The compression hardness is 2.6-2.9N, the tensile strength is 200-250 KPa, and the resilience rate can reach 40%; the supported microbial activity excitant can effectively promote the propagation of microbes, so that the microbes have high biomass and high biological activity, and the biomass can reach 30kg/m³The water treatment device has the advantages that the communicated porous structure enables the water treatment device not to be blocked easily in the water treatment process, the mass transfer efficiency is obviously improved, the water treatment efficiency is improved, the water treatment device has the characteristics of strong stability, strong impact resistance and stable treatment effect, and the water treatment device is suitable for treating various domestic sewage and industrial wastewater.

The biological membrane blanket filler is light in material and convenient to use, and the membrane blanket material has high mechanical strength and is not easy to damage, so that the service life is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a microstructure diagram of a foamed sponge prepared in example 1;

FIG. 2 is a diagram of a finished product of the biofilm carpet filler prepared in example 1;

FIG. 3 is a graph showing the effect of the biofilm blanket filler prepared in example 1 and the commercial conventional MBBR on the COD treatment of wastewater;

FIG. 4 is a graph showing the effect of the biofilm blanket filler prepared in example 1 and the ammonia nitrogen treatment effect of the common MBBR on wastewater.

Detailed Description

Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.

It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

The "parts" in the present invention are in parts by weight unless otherwise specified.

The hydrolase used in the following examples is a commercially available ordinary hydrolase, and will not be described repeatedly.

Example 1

The preparation of the biomembrane carpet filler comprises the following steps:

80 parts of diphenylmethane diisocyanate, 20 parts of polyether glycerol and 19 parts of CaCO₃Mixing with 0.6 part of dicumyl peroxide, adding 2 parts of a mixture consisting of manganese oxide, ferric oxide, cobalt and nickel according to the weight ratio of 1: 1, foaming 1 part of tourmaline powder in a mould, mixing 0.5 part of each of foam stabilizer organosilicon and diffusant ethyl cellulose, processing to obtain a polyurethane matrix, then putting into a closed box body with the same size, filling mixed gas of air and hydrogen according to the volume ratio of 5:2 and the total volume of 0.3 time of the box body, generating impact by ignition, and breaking closed holes by impact to obtain the biomembrane blanket filler.

The detection shows that the obtained biomembrane blanket filler has the porosity of 26-30 meshes, the porosity of 95 percent, the tensile strength of 250KPa, the compression hardness of 2.7N, the resilience of 40 percent and the density of 30kg/m³The structure is a communicated porous structure, and the microstructure is shown in figure 1;

cutting the prepared biomembrane blanket filler into slices with the thickness of 1cm by a numerical control sponge cutting machine, then cutting the slices into slices with the length of 2.0m, finally cutting the slices into strips with the width of 0.6m, namely, the biomembrane blanket substrate, selecting 4.8m of terylene woven cloth with the width of 4cm, doubling up, respectively keeping 0.2m at the front end and the rear end, putting the membrane blanket substrate in the middle of the doubled up woven cloth, sewing the membrane blanket substrate on the membrane blanket through 4 sewing threads at the position of 0.2m, naturally forming a ring at the front end and the rear end, and finishing the processing to obtain the finished product of the biomembrane blanket filler, as shown in figure 2.

Example 2

The preparation of the biomembrane carpet filler comprises the following steps:

mixing 75 parts of diphenylmethane diisocyanate, 15 parts of polyether propylene glycol, 15 parts of dichloromethane and 0.5 part of triethanolamine, adding 1 part of a mixture consisting of manganese oxide, ferric oxide, cobalt and nickel according to the weight ratio of 1: 1, foaming 1 part of hydrolase in a mold, mixing 1 part of each of foam stabilizer organosilicon and diffusant ethyl cellulose, processing to obtain a polyurethane matrix, putting the polyurethane matrix into a closed box body with the same size, filling mixed gas of air and hydrogen according to the volume ratio of 5:2 and the total volume of 0.2 times of the box body, and igniting to generate impact to complete the process of punching closed holes to obtain the blanket filling material.

The detection shows that the obtained biomembrane blanket filler has the porosity of 26-30 meshes, the porosity of 95 percent, the tensile strength of 230KPa, the compression hardness of 2.9N, the resilience of 38 percent and the density of 35kg/m³A communicating porous structure;

cutting the prepared biomembrane blanket filler into slices with the thickness of 1cm by adopting a numerical control sponge cutting machine, then cutting the slices into slices with the length of 2.0m, finally cutting the slices into strips with the width of 0.6m, namely, the biomembrane blanket substrate, selecting 4.8m of terylene woven cloth with the width of 4cm, folding the terylene woven cloth, reserving 0.2m at the front end and the rear end respectively, putting the membrane blanket substrate in the middle of the folded woven cloth, sewing the membrane blanket substrate on the membrane blanket at the position of 0.2m through 4 sewing threads, naturally forming a ring at the front end and the rear end, and finishing the processing to obtain the finished product of the biomembrane blanket filler.

Example 3

The preparation of the biomembrane carpet filler comprises the following steps:

85 parts of diphenylmethane diisocyanate, 25 parts of polyether glycerol and 20 parts of CaCO₃Mixing with 1 part of triethylamine, adding 2 parts of a mixture consisting of manganese oxide, ferric oxide, cobalt and nickel according to the weight ratio of 1: 1, 0.5 part of tourmaline powder and 0.5 part of catalase into a mould for foaming, mixing with 0.7 part of foam stabilizer organosilicon and diffusant ethyl cellulose respectively, processing to obtain a polyurethane matrix, then putting into a closed box body with the same size, filling mixed gas of air and hydrogen according to the volume ratio of 5:2 and the total volume of 0.3 times of the box body, and igniting to generate impact so as to complete the process of breaking closed pores, thus obtaining the biomembrane blanket filler.

The detection shows that the obtained biomembrane blanket filler has the porosity of 26-30 meshes, the porosity of 97%, the tensile strength of 215KPa, the hardness of 2.6N, the resilience of 39% and the density of 25kg/m³A communicating porous structure;

cutting the prepared biomembrane blanket filler into slices with the thickness of 1cm by adopting a numerical control sponge cutting machine, then cutting the slices into slices with the length of 2.0m, finally cutting the slices into strips with the width of 0.6m, namely, the biomembrane blanket substrate, selecting 4.8m of terylene woven cloth with the width of 4cm, folding the terylene woven cloth, reserving 0.2m at the front end and the rear end respectively, putting the membrane blanket substrate in the middle of the folded woven cloth, sewing the membrane blanket substrate on the membrane blanket at the position of 0.2m through 4 sewing threads, naturally forming a ring at the front end and the rear end, and finishing the processing to obtain the finished product of the biomembrane blanket filler.

Comparative example 1

The preparation of the biomembrane carpet filler comprises the following steps:

80 parts of diphenylmethane diisocyanate, 20 parts of polyether glycerol and 19 parts of CaCO₃Mixing with 0.6 part of dicumyl peroxide, adding 0.5 part of tourmaline powder and 0.5 part of hydrolytic enzyme into a mould for foaming, mixing with 0.5 part of foam stabilizer organic silicon and 0.5 part of diffusant ethyl cellulose respectively, processing to obtain a polyurethane matrix, then putting into a closed box body with the same size, filling mixed gas of air and hydrogen according to the volume ratio of 5:2 and the total volume of 0.3 time of the box body, and igniting to generate impact, thereby completing the process of breaking closed pores, and obtaining the biomembrane blanket filler.

The detection shows that the obtained biomembrane blanket filler has the porosity of 10-20 meshes, the porosity of 85 percent, the tensile strength of 202KPa, the compression hardness of 3.2N, the resilience of 35 percent and the density of 42kg/m³。

Effect verification

Fixing the finished products of the biomembrane blanket fillers prepared in the example 1 and the comparative example 1 in a bioreactor at an interval of 0.3m multiplied by 0.4m, placing the bioreactor in organic wastewater, wherein the initial COD value is 450mg/L and the ammonia nitrogen content is 38mg/L, placing a commercially available common MBBR in the same organic wastewater, treating the wastewater, and respectively detecting the biomass loaded by each filler when the biological membrane blanket fillers stably operate for 30 days to obtain that the biomass loaded in the biomembrane blanket fillers prepared in the example 1 is 32kg/m³The biomass loaded in the biofilm blanket filler prepared in comparative example 1 was 28kg/m³Whereas the biomass loading in the commercial ordinary MBBR is only 21kg/m³. The effect of treating organic wastewater was examined, wherein the product of example 1The treatment effect of the prepared biofilm blanket filler and the commercial common MBBR on the COD of the wastewater is shown in figure 3, and the treatment effect on the ammonia nitrogen is shown in figure 4. As can be seen from FIGS. 3 and 4, the biofilm blanket filler prepared by the method has better treatment effect on COD and ammonia nitrogen, can be started within 8 days, and can be started within 15 days by using a commercially available common MBBR.

The above description is only for the preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention, the technical solution and the inventive concept of the present invention equivalent or change within the technical scope of the present invention.