Wastewater treatment solution for seafood processing plants and its usage method

Abstract

The objective is to provide a wastewater purification solution for seafood processing plants that purifies wastewater, prevents sludge buildup, and prevents foul odors from being generated from the wastewater. [Solution] The solution is a mixture containing a culture medium obtained by culturing an aqueous solution of molasses with 10 species of bacteria from the genera Aspergillus, Bacillus, Lactopranthibacillus, Enterococcus, Nocardia, Pseudomonas, Ralstonia, Rhizopus, Rhodococcus, and Rhodosprillum, as well as iron fulvic acid, molasses, seaweed powder, and water.

Description

Technical Field

[0001] The present invention relates to a purification liquid for wastewater and a method for using the same. More specifically, it is added to the wastewater of a seafood processing factory to decompose the pollution-causing substances contained in the wastewater, purify and discharge the wastewater, prevent the generation of malodors, and prevent the generation of sludge. The present invention relates to a purification liquid for the wastewater of a seafood processing factory and a method for using the same.

Background Art

[0002] In recent years, many rivers in our country have been polluted, generating malodors and accumulating sludge. Especially when there are fishing ports and seafood processing factories near the estuary, the polluted wastewater and sludge discharged from the seafood processing factories often cause great harm to the physical and mental health of the nearby residents. Therefore, it is required to prevent the generation of malodors and prevent the accumulation of sludge by decomposing the pollution-causing substances contained in the wastewater of the seafood processing factory before discharging.

[0003] Regarding the purification of wastewater discharged from seafood processing factories, Patent Document 1 describes a method of discharging treated water obtained by aerating wastewater into the ocean and a treatment method of denitrifying the foam water generated by aeration treatment and then subjecting it to activated sludge treatment and then discharging it into the ocean. However, the method described in Patent Document 1 includes activated sludge treatment and the like, and the process is complicated and it is difficult to treat a large amount of wastewater.

[0004] Regarding the removal of sludge, for example, Patent Document 2 describes a sludge purifying agent containing one or more oxygen-generating materials such as fired oyster shells, diatomaceous earth, zeolite, and wood vinegar. However, the sludge purifying agent described in Patent Document 2 could not achieve a sufficient sludge purification effect. Regarding the purification of the wastewater from seafood processing factories, conventionally, only symptomatic countermeasures have been taken, and there has been no fundamental solution until now.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] [Non-Patent Document 1] "Anaerobic Infectious Bacteria and Malodor," Hiroyuki Chosho, Shojiro Fujii, Koichi Deguchi, Journal of the Otorhinolaryngological Infectious Diseases Research Society, Vol. 5(1) 115-118. [Overview of the project] [Problems that the invention aims to solve]

[0007] While seafood processing plants process the internal organs, fins, bones, shells, and other residues generated during the processing of seafood separately, highly contaminated water and large amounts of washing water are generated during the processing of fish and shellfish and subsequent operations.

[0008] Observations of the decomposition process of highly contaminated water in seafood processing plants revealed that, immediately after processing and before decomposition, contaminated water such as reaction water and washing water often does not exhibit strong contamination or foul odors. However, it was found that when wastewater is discharged without treatment, it becomes contaminated with external bacteria and decomposes. These external bacteria ferment and decompose undecomposed organic components, increasing contamination, foul odors, and insoluble matter that serves as a precursor to sludge.

[0009] The present invention aims to provide a purification liquid that, when added to wastewater from a seafood processing plant, purifies the wastewater, prevents the generation of foul odors from the wastewater, and prevents the formation of sludge.

[0010] Furthermore, the present invention aims to provide a method for purifying wastewater from a seafood processing plant using the above-mentioned purification liquid, thereby preventing the generation of foul odors from the wastewater and preventing the formation of sludge. [Means for solving the problem]

[0011] The wastewater treatment solution for a fishery product processing plant according to the present invention is a mixture of a culture solution obtained by culturing an aqueous solution of molasses with a group of 10 bacterial species belonging to the following 10 genera, iron fulvic acid, and seaweed powder, characterized in that the 10 genera are (1) Aspergillus, Bacillus, Luctplantibacillus, Enterococcus, Nocardia, Pseudomonas, Ralstonia, Rhizopus, Rhodococcus, and Rhodospirillum.

[0012] The culture medium is a culture medium obtained by culturing a molasses aqueous solution with a concentration of 0.1% to 5.0% by mass with a group of 10 bacterial species belonging to 10 genera. If the concentration of the molasses aqueous solution is less than 0.1% by mass, the molasses does not have a sufficient effect as a fermentation aid, and if more than 5.0% by mass of molasses is added, the effect as a fermentation aid is no longer proportional to the amount of molasses added, which is economically undesirable.

[0013] Furthermore, the aforementioned mixture contains 0.0001% to 0.01% by mass of iron fulvic acid per 100% by mass of the culture medium. If the mass of iron fulvic acid is less than 0.0001% by mass, the mixture does not provide sufficient odor prevention and sludge formation prevention effects. Adding more than 0.01% by mass of iron fulvic acid is not economically desirable because the effect of preventing odor generation and sludge formation does not become proportional to the amount of iron fulvic acid added.

[0014] Furthermore, the mixture contains 0.1% to 1.0% by mass of seaweed powder per 100% by mass of the culture solution. If the amount of seaweed powder added is less than 0.1% by mass, the mixture does not provide sufficient odor prevention and sludge formation prevention effects. Adding more than 1.0% by mass of seaweed powder is also undesirable from an economic standpoint because the effect of preventing odor generation and sludge formation does not increase proportionally with the amount of seaweed powder added.

[0015] The present invention allows the purification liquid to be used by mixing 1 volume of the above-mentioned purification liquid with 10 to 100 volumes of wastewater from a seafood processing plant, performing fermentation and decomposition treatment, and then disposing of it as wastewater. [Effects of the Invention]

[0016] The group of 10 bacterial species belonging to 10 genera used in the wastewater purification liquid of the present invention are either aerobic bacteria or air-permeable anaerobic bacteria, and therefore perform aerobic fermentation. While anaerobic fermentation is accompanied by the generation of malodorous odors (see, for example, Non-Patent Document 1), aerobic fermentation produces fewer malodorous substances.

[0017] In this invention, by adding molasses, a fermentation aid, to aerobic bacteria, residual organic matter in wastewater is rapidly decomposed through an aerobic fermentation pathway, thereby reducing the amount of organic matter. Furthermore, as the molasses is aerobically fermented and decomposed, the oxygen partial pressure of the wastewater increases, suppressing the generation of malodorous substances due to anaerobic fermentation.

[0018] Fulvic acid is a functional component that moves inorganic ions, especially iron ions, from forests to the sea, and can stabilize river circulation routes to a state closer to natural circulation routes. By adding iron fulvic acid, the relationship between forests and polluted rivers can be gradually restored to its natural state before pollution.

[0019] In this invention, because it contains seaweed powder, halophilic bacteria can grow stably even if they are contaminated by bacteria from the vicinity of the seafood processing plant. As the seaweed powder, it is preferable to use, for example, seaweed meal (trade name), which is a dried powder of Sargassum from Southeast Asia, or other seaweed powders.

[0020] For the wastewater from the aquatic product processing plant of the present invention, the above purification liquid can be mixed and directly discharged. Although the discharged wastewater is not sterilized, it contains aerobic or aerotolerant anaerobic bacteria of 10 species belonging to 10 genera and a fermentation aid, so it can be fermentatively decomposed. Further, even after being discharged, pollutants and malodor-causing substances discarded from pollution sources other than the aquatic product processing plant can also be aerobically fermentatively decomposed, thereby suppressing the generation of pollutants, sludge, and malodor-causing substances.

Embodiments for Carrying Out the Invention

[0021] The purification liquid for the wastewater from the aquatic product processing plant of the present invention can contain a culture solution of the following bacterial groups of 10 species belonging to 10 genera, molasses as a fermentation aid, fulvic acid iron, seaweed powder, and water. Here, the 10 genera are characterized by being Aspergillus, Bacillus, Lactplantibacillus, Enterococcus, Nocardia, Pseudomonas, Ralstonia, Rhizopus, Rhodococcus, and Rhodospirillum.

[0022] Preferably, the bacterial group used for producing the purification liquid contains all of the 10 bacterial groups belonging to 10 genera. By including all the bacteria of 10 species belonging to 10 genera, the decomposition and fermentation actions between bacteria can be increased, pollutants can be decomposed by aerobic fermentation decomposition, the generation of malodor by anaerobic fermentation can be controlled, and various pollutants can be decomposed.

[0023] The present invention starts a new aerobic fermentation by adding a purification liquid obtained by adding molasses, a culture solution of bacteria of 10 species belonging to 10 genera, fulvic acid iron, and seaweed powder to the wastewater from the aquatic product processing plant, decomposes the organic matter in the wastewater by aerobically fermenting and decomposing the organic matter, restricts the anaerobic fermentation decomposition that generates malodor components, etc., and purifies the wastewater for drainage.

[0024] Molasses is used as a fermentation aid. In a broad sense, molasses is a liquid containing sugar, but here it preferably refers to a sugar solution obtained by removing impurities from raw sugars such as sugarcane. Molasses is an excellent fermentation aid, as it is rapidly and aerobically fermented and decomposed by the 10 genera and 10 species of bacteria mentioned above into carbon dioxide and water. At the same time, many aerobic fermentations, such as amino acid fermentation, are activated, increasing the oxygen partial pressure of the solution, suppressing the generation of malodorous substances due to anaerobic fermentation, and preventing the formation of sludge.

[0025] [Examples] (Culture solution) The present invention relates to a wastewater purification solution for a fisheries processing plant, which may be a mixture containing a culture medium obtained by mixing and culturing 10 bacterial groups belonging to the following 10 genera of bacteria, molasses, iron fulvic acid, seaweed powder, and water.

[0026] The following 10 species of bacteria can be used as the 10 genera and 10 species of bacteria of the present invention. As for the genus Aspergillus, there is Aspergillus brasiliensis (Aspergillus brasiliensis). (Lus brasiliensis) As for the genus Bacillus, there is Bacillus subtili s) As for the genus *Lactoprantibacillus*, there is *Lactoprantibacillus plantarum*. (Lactplantibacillus plantarum) As for the genus Enterococcus, there is Enterococcus faecalis (Enterococcus cus faekarisu) As for the genus Nocardia, there is Nocardia asteroides. (teroides) As for the genus Pseudomonas, there is Pseudomonas floresens. onas fluorescens) The genus Ralstonia includes Ralstonia solanacearum. olanacearum) As for the genus Rhizopus, there is Rhizopus oryzae. e) As for the genus Rhodococcus, there is Rhodococcus opacus. opacus) As for the genus Rhodospirium, there is Rhodospirium rubulub (Rhodospirium rubulub). lum rubrum)

[0027] (Manufacturing example) Manufacturing of purifying liquid Each of the 10 genera and 10 species of bacteria listed above, 1 × 10 6 cfu / cm 3 A pre-culture solution was prepared by mixing equal amounts of the specified concentrations and culturing them. Next, the pre-culture solution, 10 kg of molasses, and water were added to make a total volume of 1000 kg, and the mixture was cultured until the total mass of all bacterial cells was 0.1% by mass of the total culture solution to increase the bacterial population. Then, 1.0 kg of iron fulvic acid and 5.0 kg of seaweed powder were added, and water was added to make a total volume of 1000 kg to prepare the purification solution.

[0028] [Evaluation of the purifying solution] The purifying liquid of the present invention can be added to the wastewater of a seafood processing plant and discharged. Alternatively, the wastewater can be further subjected to fermentation and decomposition treatment such as stirring, aeration, and heating before being added to the wastewater of a seafood processing plant and discharged. Here, the treated wastewater contains 10 species of bacteria from 10 genera that have not been sterilized, and molasses as a fermentation aid, so aerobic fermentation and decomposition continues even after discharge, and contaminants and malodorous substances that have been introduced from sources other than the seafood processing plant can be removed by fermentation and decomposition.

[0029] [Method for producing evaluation solution] (Treated wastewater) 1.0 cubic meter of wastewater from a seafood processing plant was mixed with 200 liters of the purification solution described in the manufacturing example.

[0030] (Evaluation of wastewater treatment solution) 1000 kg each of the treated wastewater and untreated wastewater were stirred in a room at 25°C with the top open, and their condition was evaluated after 1 hour and 24 hours. The evaluation results are shown in Table 1.

[0031] [Table 1]

[0032] [Table 2]

[0033] As shown in Table 1, the wastewater from the untreated seafood processing plant immediately after discharge was a slightly cloudy wastewater with a permeability of 11 cm and an odor intensity of 3 (easily detectable odor) to 4 (strong odor). However, after 48 hours, the wastewater from the untreated seafood processing plant had a permeability of 4 cm and an odor intensity of 5 (intense odor), indicating that it had changed into a cloudy wastewater with a strong malodorous odor.

[0034] On the other hand, when 200 liters of the purification liquid described in the production example were added to 1.0 cubic meter of wastewater from a seafood processing plant according to the present invention and stirred for 48 hours, the treated wastewater showed an increased permeability of 19 cm and a significant improvement in odor intensity from 1 (barely perceptible odor) to 2 (weak odor that can be recognized as something).

Claims

1. A wastewater purification solution for a seafood processing plant, characterized by being a mixture of a culture medium obtained by culturing an aqueous solution of molasses with a group of 10 bacterial species belonging to the following 10 genera, iron fulvic acid, and seaweed powder, The aforementioned 10 genera of fungi, (1) Aspergillus genus (2) Bacillus genus (3) Genus Lactplantibacillus (4) Genus Enterococcus (5) Genus Nocardia (6) Pseudomonas genus (7) Ralstonia genus (8) Rhizopus genus (9) Rhodococcus (10) Rhodospirillum genus A wastewater treatment solution for a seafood processing plant, characterized by the following features.

2. The culture medium is a culture medium obtained by culturing a molasses aqueous solution with a concentration of 0.1% to 5.0% by mass with a group of 10 bacterial species belonging to the 10 genera. The wastewater purification solution for a fisheries processing plant according to claim 1, characterized in that the mixed solution contains 100% by mass of the culture solution, 0.0001% to 0.01% by mass of the iron fulvic acid, and 0.1% to 1.0% by mass of the seaweed powder.

3. A method for treating wastewater from a fisheries processing plant, characterized by mixing 1 volume of the purification solution described in claim 1 or claim 2 with 10 to 100 volumes of wastewater from the fisheries processing plant, performing fermentation and decomposition treatment, and then disposing of it as wastewater.

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