Wastewater purification solution for fishery processing plants and its use

Abstract

The objective of the present invention is to provide a purifying liquid for wastewater from a marine product processing plant, which purifies the wastewater from a marine product processing plant, prevents the accumulation of sludge, and prevents foul odors from being generated from the wastewater. [Solution] The mixture contains a culture solution obtained by culturing an aqueous solution of molasses using 10 species of bacteria, namely, Aspergillus, Bacillus, Lactobacillus, Enterococcus, Nocardia, Pseudomonas, Ralstonia, Rhizopus, Rhodococcus, and Rhodospurium, iron fulvic acid, molasses, seaweed powder, and water.

Description

[Technical field]

[0001] The present invention relates to a wastewater purification solution and a method for using the same, and more particularly to a wastewater purification solution for a seafood processing plant that is added to the wastewater to decompose pollutants contained in the wastewater, purify the wastewater, and discharge it, thereby preventing the generation of foul odors and the generation of sludge, and a method for using the same. [Background technology]

[0002] In recent years, many rivers in Japan have become polluted, emitting foul odors and accumulating sludge. In particular, in cases where fishing ports and fishery processing plants are located near the mouths of rivers, the polluted wastewater and sludge discharged from the fishery processing plants often cause serious damage to the mental and physical health of nearby residents. For this reason, there is a need to prevent the generation of foul odors and the accumulation of sludge by breaking down the polluting substances contained in the wastewater from fishery processing plants before discharging it.

[0003] Regarding the purification of wastewater discharged from fishery processing plants, Patent Document 1 describes a method of aerating wastewater and discharging the treated water into the ocean, and a treatment method of denitrifying the foam water generated by the aeration process, treating it with activated sludge, and then discharging it into the ocean. However, the method described in Patent Document 1 includes activated sludge treatment and other processes, making it difficult to treat large amounts of wastewater due to the complex process.

[0004] Regarding sludge removal, for example, Patent Document 2 describes a sludge purifying agent that contains one or more oxygen generating materials such as burnt oyster shells, diatomaceous earth, zeolite, wood vinegar, etc. However, the sludge purifying agent described in Patent Document 2 does not provide a sufficient sludge purification effect. Regarding purification of wastewater from fishery processing plants, only symptomatic measures have been taken so far, and no fundamental solution has been found to date. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4019277 [Patent Document 2] Publication No. 2012-86207 [Non-patent literature]

[0006] [Non-Patent Document 1] "Anaerobic infection bacteria and malodor", Hiroyuki Chosoko, Sojiro Fujii, Koichi Deguchi, Journal of the Otolaryngological Infectious Diseases Research Society, Vol. 5(1) 115-118 Summary of the Invention [Problem to be solved by the invention]

[0007] At seafood processing plants, residues generated when processing seafood, such as organs, fins, bones, shells, and mollusks, are disposed of separately, but highly contaminated water and large amounts of washing water are generated during seafood processing and subsequent operations.

[0008] When observing the putrefaction process of highly polluted water in fishery processing plants, it was found that immediately after the processing process, before putrefaction, polluted water such as reaction water and washing water often does not produce strong pollution or foul odors. However, it was found that when wastewater is discharged without treatment, it becomes contaminated by external bacteria and putrefies, and the external bacteria ferment and decompose the undecomposed organic components, multiplying, causing pollution, foul odors, and an increase in insoluble matter that is the precursor to sludge.

[0009] An object of the present invention is to provide a purifying liquid which is added to wastewater from a seafood processing plant to purify the wastewater, prevent the generation of bad odor from the wastewater, and prevent the formation of sludge.

[0010] Another object of the present invention is to provide a method for purifying wastewater from a fishery processing plant using the above-mentioned purification liquid, thereby preventing the generation of foul odor from the wastewater and the formation of sludge. [Means for solving the problem]

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

[0012] The culture solution is a culture solution obtained by culturing an aqueous molasses solution having a concentration of 0.1% to 5.0% by mass with a bacterial group of 10 species belonging to 10 genera. If the concentration of the aqueous molasses solution is less than 0.1% by mass, a sufficient effect as a fermentation aid for molasses cannot be obtained, and adding more than 5.0% by mass of molasses is not economically preferable because the effect as a fermentation aid is not proportional to the amount of molasses added.

[0013] The mixed solution contains 0.0001% to 0.01% by mass of fulvic acid iron relative to 100% by mass of the culture solution. If the mass of fulvic acid iron is less than 0.0001% by mass, the mixed solution does not have a sufficient effect of preventing odors and sludge formation, and adding fulvic acid iron in an amount exceeding 0.01% by mass is not economically preferable because the effect of preventing odors and sludge formation is not proportional to the amount of fulvic acid iron added.

[0014] Furthermore, the mixture contains 0.1% to 1.0% by mass of seaweed powder relative to 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 have a sufficient effect of preventing odors and sludge formation, and even if the amount of seaweed powder added exceeds 1.0% by mass, the effect of preventing odors and sludge formation is not proportional to the amount of seaweed powder added, which is economically undesirable.

[0015] The method for using the purifying solution of the present invention is to mix 1 volume of the above-mentioned purifying solution with 10 to 100 volumes of wastewater from a seafood processing plant, ferment and decompose the mixture, and then discard the mixture as wastewater. Effect of the Invention

[0016] The 10 bacterial species belonging to 10 genera used in the wastewater purification solution of the present invention are aerobic bacteria or gas-permeable anaerobic bacteria, and therefore undergo aerobic fermentation. Anaerobic fermentation is accompanied by the generation of malodor (see, for example, Non-Patent Document 1), whereas aerobic fermentation produces fewer malodorous substances.

[0017] In the present invention, by adding molasses as a fermentation aid to the aerobic bacterial group, organic matter remaining in the wastewater is rapidly decomposed through an aerobic fermentation pathway, thereby reducing the amount of organic matter, and as the molasses is aerobically fermented and decomposed, the oxygen partial pressure in the wastewater increases, thereby 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 the river flow path to a state close to the natural flow path. By adding iron fulvic acid, it has the effect of gradually restoring the relationship between forests and polluted rivers to the natural relationship before pollution.

[0019] In the present invention, since seaweed powder is included, the bacteria can grow stably even if they are contaminated by halophilic bacteria from nearby seafood processing plants. As the seaweed powder, for example, Seaweed Meal (trade name), which is a powder made by drying Sargassum from Southeast Asia, or other seaweed powders are preferably used.

[0020] The wastewater from the fishery processing plant of the present invention can be mixed with the above-mentioned purification liquid and discharged as it is. The discharged wastewater is not sterilized, but contains 10 aerobic or gas-permeable anaerobic bacteria of 10 genera and 10 species of bacteria and a fermentation aid, so it can be fermented and decomposed. Furthermore, even after being discharged, pollutants and odor-causing substances discarded from pollution sources other than the fishery processing plant can be aerobically fermented and decomposed, thereby suppressing the generation of pollutants, sludge, and odor-causing substances. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The purification liquid for wastewater from a fishery processing plant of the present invention can contain a culture solution of a group of bacteria of 10 species belonging to the following 10 genera, molasses as a fermentation aid, iron fulvic acid, seaweed powder, and water, wherein the 10 genera are Aspergillus, Bacillus, Luctplantibacillus, Enterococcus, Nocardia, Pseudomonas, Ralstonia, Rhizopus, Rhodococcus, and Rhodospirillum.

[0022] The bacteria used to produce the purifying liquid preferably contain all 10 species of bacteria belonging to 10 genera. By containing all 10 species of bacteria belonging to 10 genera, the mutual decomposition and fermentation action of the bacteria can be increased, pollutants can be decomposed by aerobic fermentation decomposition, the generation of malodors due to anaerobic fermentation can be controlled, and a wide variety of pollutants can be decomposed.

[0023] In the present invention, a novel aerobic fermentation is initiated by adding a purification solution made by adding molasses and a culture solution of 10 species of bacteria from 10 genera, iron fulvic acid, and seaweed powder to wastewater from a seafood processing plant, and the organic matter in the wastewater is decomposed by aerobically fermenting and decomposing the organic matter. This limits anaerobic fermentation and decomposition, which generates odorous substances, and the wastewater can be purified and discharged.

[0024] Molasses is used as a fermentation aid. In a broad sense, molasses is a liquid containing sugar, but here it is preferable to refer to the sugar liquid obtained by removing impurities from raw sugar such as sugar cane. Molasses is a very good fermentation aid, and is rapidly and aerobically fermented and decomposed into carbon dioxide and water by the above-mentioned 10 genera and 10 species of bacteria, and 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] [Example] (culture solution) The present invention is a purification liquid for wastewater from a seafood processing plant, which can be a mixture containing a culture liquid obtained by mixed culture of 10 types of bacteria belonging to the following 10 genera, molasses, iron fulvic acid, seaweed powder, and water.

[0026] As the 10 species of bacteria in the 10 genera of bacteria of the present invention, the following 10 species of bacteria can be used. Aspergillus species include Aspergillus braziliensis. Lus brasiliensis The genus Bacillus includes Bacillus subtilis. s) The genus Lactobacillus includes Lactobacillus plantarum. (Lactplantibacillus plantarum) Enterococcus faecalis is one of the Enterococcus genus. cus faekarisu) The Nocardia genus includes Nocardia asteroides. teroides) The genus Pseudomonas includes Pseudomonas florescens. Onas fluorescens The Ralstonia genus includes Ralstonia solanacearum. olanacearum) The genus Rhizopus includes Rhizopus oryzae. e) The genus Rhodococcus includes Rhodococcus opacus. opacus) The genus Rhodospirillum includes Rhodospirillum rubulbu. lum rubrum

[0027] (Production example) Production of purification liquid The 10 genera and 10 species of bacteria were each mixed at 1×10 6 cfu / cm 3 The preculture solution was then mixed in equal amounts at a concentration of 0.1% by mass, and cultured to produce a preculture solution. Next, the preculture solution, 10 kg of molasses, and water were added to make a total volume of 1000 kg, and the bacteria were allowed to grow until the total mass of all the bacteria was 0.1% by mass of the total culture solution. Further, 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 produce a clarified solution.

[0028] [Evaluation of purification solution] The purifying solution of the present invention can be added to wastewater from a fishery processing plant and discharged. In addition, the wastewater can be further subjected to fermentation and decomposition treatment such as stirring, aeration, heating, etc., and then added to the wastewater from a fishery processing plant and discharged. Here, since the treated wastewater contains unsterilized bacteria of 10 genera and 10 species and molasses as a fermentation aid, aerobic fermentation and decomposition can be continued even after discharge, and contaminants and malodorous substances mixed in from pollution sources generated from outside the fishery processing plant can be removed by fermentation and decomposition.

[0029] [Method of manufacturing the evaluation solution] (treated wastewater) To 1.0 cubic meter of wastewater from a seafood processing plant, 200 liters of the purification solution described in the Preparation Example were added.

[0030] (Evaluation of treated wastewater) 1000 kg each of the treated wastewater and untreated wastewater were stirred with the top open in a room at 25°C, and the 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, immediately after discharge, untreated wastewater from a seafood processing plant had a permeability of 11 cm and an odor intensity of 3 (easily detectable odor) to 4 (strong odor), making it a slightly cloudy wastewater. However, 48 hours later, the untreated wastewater from a seafood processing plant had a permeability of 4 cm and an odor intensity of 5 (strong odor), and had changed into a cloudy wastewater with a strong odor.

[0034] On the other hand, when 200 liters of the purification solution described in the manufacturing example was added to 1.0 cubic meter of wastewater from a fishery processing plant according to the present invention and stirred for 48 hours, the permeability increased to 19 cm and the odor intensity was significantly improved to 1 (a smell that can barely be detected) to 2 (a weak smell that can be recognized as to what the smell is).

Claims

1. A purification solution for wastewater from a fishery processing plant, which is a mixture of a culture solution obtained by culturing an aqueous solution of molasses with a group of 10 species of bacteria belonging to the following 10 genera, iron fulvic acid, and seaweed powder, The 10 genera are (1) Aspergillus (2) Bacillus (3) Lactobacillus genus (4) Enterococcus (5) Nocardia (6) Pseudomonas (7) Ralstonia (8) Rhizopus (9) Rhodococcus (10) Rhodospirillum A purification solution for wastewater from a fishery processing plant, characterized in that

2. The culture solution is a culture solution obtained by culturing a molasses aqueous solution having a concentration of 0.1% by mass to 5.0% by mass with a group of 10 bacterial species belonging to the 10 bacterial genera, The purification solution for wastewater from a fishery processing plant as described in claim 1, characterized in that the mixed solution is prepared by adding water to the culture solution containing 0.0001% by mass to 0.01% by mass of fulvic acid iron and 0.1% by mass to 1.0% by mass of seaweed powder to make it 100% by mass.

3. A method for treating wastewater from a fishery processing plant, comprising mixing 1 part by volume of the purifying solution according to claim 1 or 2 with 10 to 100 parts by volume of the wastewater from a fishery processing plant, subjecting the mixture to fermentation and decomposition treatment, and then discharging the mixture as wastewater.

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