JP2007196172A - Liquid extract of humic substance, solidifying agent, concentrating agent and method for treating organic waste water by using them - Google Patents

Liquid extract of humic substance, solidifying agent, concentrating agent and method for treating organic waste water by using them Download PDF

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JP2007196172A
JP2007196172A JP2006019805A JP2006019805A JP2007196172A JP 2007196172 A JP2007196172 A JP 2007196172A JP 2006019805 A JP2006019805 A JP 2006019805A JP 2006019805 A JP2006019805 A JP 2006019805A JP 2007196172 A JP2007196172 A JP 2007196172A
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humic substance
substance extract
humic
extract
acid
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Mutsuaki Imaoka
睦明 今岡
Osamu Hamamoto
修 濱本
Takayuki Marumoto
隆之 丸本
Tomoki Kobayashi
知樹 小林
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Mitsui Engineering and Shipbuilding Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

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  • Compounds Of Unknown Constitution (AREA)
  • Treatment Of Biological Wastes In General (AREA)
  • Activated Sludge Processes (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid extract of a humic substance, in which a component effective for waste water treatment is uniformized and concentrated highly and to provide a method for treating organic waste water in excellent efficiency by using the liquid extract of the humic substance. <P>SOLUTION: The liquid extract of the humic substance is obtained by extracting the humic substance from at least one selected from humus, leaf mold, compost, peat and peaty soil by using an aqueous solution of pH≥7. The method for treating organic waste water comprises a step of injecting the liquid extract of the humic substance at a gas-liquid contact step and/or at a sludge treatment step. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、腐植性物質抽出液、固形処理剤、濃縮処理剤及びこれらを用いた有機性廃水の処理方法に関し、詳しくは公共下水、農業集落排水、し尿処理、産業廃水など一般の有機性廃水処理の分野に適用できる腐植性物質抽出液、固形処理剤、濃縮処理剤及びこれらを用いた有機性廃水の処理方法に関する。   The present invention relates to a humic substance extract, a solid treatment agent, a concentration treatment agent, and a method for treating organic wastewater using these, and in particular, general organic wastewater such as public sewage, agricultural settlement drainage, human waste treatment, and industrial wastewater. The present invention relates to a humic substance extract, a solid treatment agent, a concentration treatment agent, and an organic wastewater treatment method using these, which can be applied to the field of treatment.

従来、特許文献１には、腐植物質を流量調整槽、曝気槽、沈殿槽及び汚泥濃縮槽とからなる活性汚泥方式の廃水処理システムに利用する技術が開示されている。腐植物質の添加態様を見ると、微生物培養槽に腐植物質を細かく粉砕して添加している。腐植物質は、植物残滓や微生物遺体が土壌中で微生物により分解され、その分解産物から化学的・生物的に合成された高分子有機酸の混合物であり、腐植酸や純度の高いミネラル、ビタミン、アミノ酸等を含む高品質な高原高位泥炭であると記載している。このシステムにおいては、汚泥濃縮槽に導入された汚泥は、細かく粉砕された腐植物質と接触する。その結果、汚泥中の窒素成分、硫黄成分及び脂肪酸等が生物分解酵素の作用により還元分解されて生成したアンモニア、硫化水素、揮発性アミン及びメルカプタン等の有機硫黄化合物等の悪臭成分が、腐植物質から溶出した金属水和物と結合し、安定した鎖化合物として改質汚泥中に保持され、悪臭発生が抑制される、としている。
特開２００３−２２５６９４号公報 特開２００１−３４０８８７号公報 Conventionally, Patent Document 1 discloses a technique of using humic substances in an activated sludge wastewater treatment system including a flow rate adjustment tank, an aeration tank, a precipitation tank, and a sludge concentration tank. Looking at the addition mode of humic substances, the humic substances are finely ground and added to the microorganism culture tank. Humic substances are a mixture of high-molecular organic acids that are chemically and biologically synthesized from the decomposition products of plant residues and microbial remains in the soil, and are humic acid, high-purity minerals, vitamins, It is described as a high-quality plateau peat containing amino acids and the like. In this system, the sludge introduced into the sludge concentration tank comes into contact with finely ground humic substances. As a result, malodorous components such as organic sulfur compounds such as ammonia, hydrogen sulfide, volatile amines and mercaptans are produced by reducing and decomposing nitrogen, sulfur and fatty acids in sludge by the action of biodegrading enzymes. It is said that it binds to the metal hydrate eluted from the water and is retained in the modified sludge as a stable chain compound, and the generation of malodor is suppressed.
JP 2003-225694 A JP 2001-340887 A

しかし、特許文献１に記載の技術では、腐植物質をそのまま使用するものであり、また例え特許文献２のようなペレットとして使用しても、腐植物質には、微生物処理に不要な成分もたくさん含まれており、有効成分は少ないので、多量の腐植物質を廃水処理システムに使用すると汚泥の増量化を招くおそれがある。   However, in the technique described in Patent Document 1, the humic substance is used as it is, and even if it is used as a pellet as in Patent Document 2, the humic substance contains many components unnecessary for microbial treatment. Because there are few active ingredients, using a large amount of humic substances in a wastewater treatment system may increase the amount of sludge.

また天然の腐植物質をそのまま、あるいはペレットとして用いても、有効成分が均質に含有されているわけではないので、廃水処理効率のばらつきが生じやすい問題がある。   Further, even if natural humic substances are used as they are or as pellets, the active ingredients are not uniformly contained, so that there is a problem that variations in wastewater treatment efficiency are likely to occur.

そこで、本発明の課題は、廃水処理に有効な成分が均質化され、且つ高密度化された腐植性物質抽出液、固形処理剤、濃縮処理剤を提供することにある。   Accordingly, an object of the present invention is to provide a humic substance extract, a solid treatment agent, and a concentration treatment agent in which components effective for wastewater treatment are homogenized and densified.

また本発明の他の課題は、廃水処理に有効な成分が均質化され、且つ高密度化された腐植性物質抽出液、固形処理剤、濃縮処理剤を用いて、処理効率に優れた有機性廃水の処理方法を提供することにある。   Another object of the present invention is to provide an organic material that is excellent in treatment efficiency by using a humic substance extract, solid treatment agent, and concentration treatment agent that are homogenized and densified with effective components for wastewater treatment. It is to provide a method for treating wastewater.

また本発明の他の課題は、以下の記載によって明らかとなる。   Other problems of the present invention will become apparent from the following description.

本発明の上記課題を解決すべく鋭意検討した結果、以下のことを見出した。即ち、腐植性物質の有効成分を抽出するための条件を鋭意検討して抽出手法を見出した。また廃水処理に適する抽出液について構造について鋭意検討した結果、有効成分の特定の濃度と構造を見出し、本発明に至った。   As a result of intensive studies to solve the above problems of the present invention, the following has been found. That is, the extraction method was discovered by intensively studying the conditions for extracting the effective component of the humic substance. Moreover, as a result of earnestly examining the structure of the extract suitable for wastewater treatment, a specific concentration and structure of the active ingredient were found, and the present invention was achieved.

また、上記課題は、以下の各発明によって解決される。   Moreover, the said subject is solved by each following invention.

（請求項１）
腐植土、腐葉土、堆肥、泥炭又は泥炭質土壌から選ばれる少なくとも一種からなる腐植性物質からｐＨ７以上の水溶液で抽出した腐植性物質抽出液。 (Claim 1)
A humic substance extract extracted from an humic substance consisting of at least one selected from humus soil, humus soil, compost, peat or peat-like soil with an aqueous solution having a pH of 7 or more.

（請求項２）
腐植土、腐葉土、堆肥、泥炭又は泥炭質土壌から選ばれる少なくとも一種からなる腐植性物質から抽出した腐植性物質抽出液であり、該腐植性物質抽出液がｐＨ３．０〜６．０間の酸当量が１０ｍｅｑ／Ｌ以上、液の風乾物の赤外線吸収スペクトル（ＩＲスペクトル）が３４００ｃｍ−１、１７００ｃｍ−１、１４００ｃｍ−１、１１００ｃｍ−１を中心としてプラスマイナス５０ｃｍ−１以内に吸収ピークを有することを特徴とする腐植性物質抽出液。 (Claim 2)
A humic substance extract extracted from a humic substance consisting of at least one selected from humus soil, humus soil, compost, peat or peat-like soil, and the humic substance extract is an acid between pH 3.0 and 6.0 equivalent of 10 meq / L or more, infrared absorption spectrum (IR spectrum) 3400 cm -1 wind dry matter of the liquid, 1700 cm -1, 1400 cm -1, to have an absorption peak within ± 50 cm -1 around the 1100 cm -1 Humic substance extract characterized by the following.

（請求項３）
鉄化合物、マグネシウム化合物又はカルシウム化合物から選ばれる少なくとも一種の化合物を添加してなることを特徴とする請求項１又は２記載の腐植性物質抽出液。 (Claim 3)
The humic substance extract according to claim 1 or 2, wherein at least one compound selected from an iron compound, a magnesium compound or a calcium compound is added.

（請求項４）
請求項１、２又は３記載の腐植性物質抽出液に、酸を添加してｐＨ４以下で析出する固形物からなる固形処理剤。 (Claim 4)
The solid processing agent which consists of a solid substance which adds an acid to the humic substance extract of Claim 1, 2, or 3, and precipitates at pH 4 or less.

（請求項５）
前記酸が、硫酸、塩酸又は硝酸からなる鉱酸から選ばれる少なくとも一種であることを特徴とする請求項４記載の固形処理剤。 (Claim 5)
The solid treatment agent according to claim 4, wherein the acid is at least one selected from mineral acids consisting of sulfuric acid, hydrochloric acid or nitric acid.

（請求項６）
請求項１、２又は３記載の腐植性物質抽出液を、ろ過処理によって分離された濃縮液からなる濃縮処理剤。 (Claim 6)
The concentration processing agent which consists of the concentrate which separated the humic substance extract of Claim 1, 2, or 3 by the filtration process.

（請求項７）
請求項１、２又は３記載の腐植性物質抽出液を、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。 (Claim 7)
A method for treating organic wastewater, comprising injecting the humic substance extract according to claim 1, 2 or 3 into a gas-liquid contact step and / or a sludge treatment step.

（請求項８）
請求項４又は５記載の固形処理剤を、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。 (Claim 8)
A method for treating organic wastewater, comprising injecting the solid treatment agent according to claim 4 or 5 into a gas-liquid contact step and / or a sludge treatment step.

（請求項９）
請求項６記載の濃縮処理剤を、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。 (Claim 9)
A method for treating organic wastewater, comprising injecting the concentrated treatment agent according to claim 6 into a gas-liquid contact step and / or a sludge treatment step.

（請求項１０）
請求項１、２又は３記載の腐植性物質抽出液を、好気性生物学的処理施設にて発生する汚泥と容器内で３時間以上の平均水理学的な滞留時間をもって混合したのち、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。 (Claim 10)
After mixing the humic substance extract according to claim 1, 2 or 3 with sludge generated in an aerobic biological treatment facility with an average hydraulic residence time of 3 hours or more in the container, the gas-liquid A method for treating organic wastewater, which is injected into a contact step and / or a sludge treatment step.

本発明によれば、廃水処理に有効な成分が均質化され、且つ高密度化された腐植性物質抽出液、固形処理剤、濃縮処理剤を提供することができる。   According to the present invention, it is possible to provide a humic substance extract, a solid treatment agent, and a concentration treatment agent in which components effective for wastewater treatment are homogenized and densified.

また本発明によれば、廃水処理に有効な成分が均質化され、且つ高密度化された腐植性物質抽出液、固形処理剤、濃縮処理剤を用いて、発生汚泥量の抑制、悪臭発生の抑制、硝化速度向上などの処理性能が向上した（即ち処理効率に優れた）有機性廃水の処理方法を提供することができる。更に抽出液等の使用により廃水処理プロセスの制御が確実に行うことができ、操作の容易な有機性廃水の処理方法を提供可能である。   Further, according to the present invention, components effective for wastewater treatment are homogenized and densified using a humic substance extract, a solid treatment agent, and a concentration treatment agent. It is possible to provide a method for treating organic wastewater having improved treatment performance such as suppression and nitrification rate improvement (that is, excellent treatment efficiency). Furthermore, the use of an extract or the like can reliably control the wastewater treatment process, and can provide an organic wastewater treatment method that is easy to operate.

以下、本発明の実施の形態を説明する。   Embodiments of the present invention will be described below.

＜腐植性物質抽出液＞
本発明の腐植性物質抽出液は、腐植土、腐葉土、堆肥、泥炭又は泥炭質土壌から選ばれる少なくとも一種からなる腐植性物質からｐＨ７以上の水溶液で抽出したものである。 <Humic substance extract>
The humic substance extract of the present invention is extracted with an aqueous solution having a pH of 7 or more from a humic substance consisting of at least one selected from humus soil, humus soil, compost, peat, or peat soil.

本発明において、腐植性物質は、腐植土、腐葉土、堆肥、泥炭又は泥炭質土壌から選ばれる一種を用いてもよいし、あるいは二種以上を組み合わせてもよい。   In the present invention, as the humic substance, one kind selected from humus soil, humus soil, compost, peat or peat-like soil may be used, or two or more kinds may be combined.

抽出するために用いる液はｐＨ７以上の水溶液であればよく、かかる水溶液としては、水酸化ナトリウムなどのアルカリ金属の水酸化物、水酸化マグネシウムなどのアルカリ土類金属の水酸化物などが好ましく用いられる。   The liquid used for the extraction may be an aqueous solution having a pH of 7 or higher. As such an aqueous solution, an alkali metal hydroxide such as sodium hydroxide, an alkaline earth metal hydroxide such as magnesium hydroxide, or the like is preferably used. It is done.

本発明の腐植性物質抽出液を製造するには、図１に示すように、抽出工程１、ｐＨ調整
工程２を備える製造設備を用いる。抽出工程１には抽出槽を有しており、上記の腐植性物質が添加される。ｐＨ調整工程２では抽出に使用されるｐＨ７以上の水溶液（以下、抽出水溶液という）が調整され、抽出槽に添加される。 In order to produce the humic substance extract of the present invention, as shown in FIG. 1, a production facility including an extraction step 1 and a pH adjustment step 2 is used. The extraction process 1 has an extraction tank, and the above humic substances are added. In the pH adjustment step 2, an aqueous solution having a pH of 7 or more (hereinafter referred to as an extraction aqueous solution) used for extraction is adjusted and added to the extraction tank.

腐植性物質と抽出水溶液の混合比は、重量比で腐植性物質１部に対して抽出水溶液１０〜１０００部の範囲が好ましく、より好ましくは５０〜１００部の範囲である。   The mixing ratio of the humic substance and the extraction aqueous solution is preferably in the range of 10 to 1000 parts of the extraction aqueous solution, more preferably in the range of 50 to 100 parts by weight with respect to 1 part of the humic substance.

抽出工程１で抽出がなされたら、必要によりろ過処理して余分な固形分を除去して腐植性物質抽出液Ｉを得る。ろ過処理に用いるろ布乃至ろ紙は目開き０．１〜１ｍｍの範囲が好ましい。   When extraction is performed in the extraction step 1, a humic substance extract I is obtained by removing the solid matter by filtration if necessary. The filter cloth or filter paper used for the filtration treatment preferably has an aperture of 0.1 to 1 mm.

この腐植性物質抽出液Ｉは、濃度がｐＨ３．０〜６．０間の酸当量が１０ｍｅｑ／Ｌ以上であり、構造は液の風乾物のＩＲスペクトルが３４００ｃｍ−１、１７００ｃｍ−１、１４００ｃｍ−１、１１００ｃｍ−１を中心としてプラスマイナス５０ｃｍ−１以内に吸収ピークを有する。 This humic substance extract I has an acid equivalent between pH 3.0 and 6.0 of 10 meq / L or more, and the structure is such that the IR spectrum of the air-dried liquid is 3400 cm −1 , 1700 cm −1 , 1400 cm − 1 has an absorption peak within plus or minus 50 cm −1 centering on 1100 cm −1 .

図４には、抽出液滴定曲線が示されており、０．１Ｎ−ＮaＯＨ滴定量とｐＨの関係により、ｐＨ３．０〜６．０間の酸当量が１０ｍｅｑ／Ｌ以上の領域が明らかにされている。   FIG. 4 shows an extraction droplet constant curve, and the region where the acid equivalent between pH 3.0 and 6.0 is 10 meq / L or more is clarified by the relationship between 0.1N-NaOH titration amount and pH. ing.

図５には腐植性物質（腐植土）抽出液ＩのＩＲスペクトルが示されている。図５において、（１）は水による被抽出物乾燥品、（２）はｐＨ４．０抽出液による被抽出物乾燥品、（３）は水によって抽出されずに残存した部分の乾燥品、（４）はｐＨ４．０抽出液によって抽出されずに残存した部分の乾燥品を各々示している。   FIG. 5 shows an IR spectrum of the humic substance (humus soil) extract I. In FIG. 5, (1) is a dry product to be extracted with water, (2) is a dry product to be extracted with a pH 4.0 extract, (3) is a dry product of a portion remaining without being extracted with water, ( 4) shows the dried product of the portion remaining without being extracted by the pH 4.0 extract.

また本発明では、図１に示すように、上記の腐植性物質抽出液Ｉに、鉄化合物、マグネシウム化合物又はカルシウム化合物から選ばれる少なくとも一種の化合物を添加することにより、腐植性物質抽出液ＩＩが得られる。かかる化合物の腐植性物質抽出液Ｉに対する添加量は、重量比で腐植性物質１部に対し１／１００〜１部の範囲が好ましく、より好ましくは５／１００〜１部の範囲である。   Moreover, in this invention, as shown in FIG. 1, by adding at least 1 type of compound chosen from an iron compound, a magnesium compound, or a calcium compound to said humic substance extract liquid I, humic substance extract liquid II is obtained. can get. The amount of the compound added to the humic substance extract I is preferably in the range of 1/100 to 1 part, more preferably in the range of 5/100 to 1 part by weight with respect to 1 part of the humic substance.

鉄化合物としては、塩化第２鉄、硫酸第２鉄などが挙げられ、マグネシウム化合物としては、塩化マグネシウム、硫酸マグネシウムなどが挙げられ、カルシウム化合物としては、塩化カルシウム、炭酸カルシウムなどが挙げられる。   Examples of the iron compound include ferric chloride and ferric sulfate. Examples of the magnesium compound include magnesium chloride and magnesium sulfate. Examples of the calcium compound include calcium chloride and calcium carbonate.

かかる腐植性物質抽出液ＩＩの濃度及び構造は、濃度がｐＨ３．０〜６．０間の酸当量が１０ｍｅｑ／Ｌ以上であり、構造は液の風乾物のＩＲスペクトルが３４００ｃｍ−１（ＯＨ伸縮振動）、１７００ｃｍ−１（Ｃ＝Ｏ伸縮振動）、１４００ｃｍ−１（酸などのＯＨ変角振動、Ｃ−Ｈ変角振動）、１１００ｃｍ−１（エステル、エーテルのＣ−Ｏ伸縮振動）付近（プラスマイナス５０ｃｍ−１以内）に吸収ピークを有する。 The concentration and structure of the humic substance extract II is such that the acid equivalent between pH 3.0 and 6.0 is 10 meq / L or more, and the structure shows that the IR spectrum of the liquid air-dried product is 3400 cm −1 (OH stretching vibration), 1700cm -1 (C = O stretching vibration), OH bending vibration, such as 1400 cm -1 (acid, C-H bending vibration), 1100 cm -1 (ester, C-O stretching vibration of the ether) near ( It has an absorption peak within ± 50 cm −1 .

このような腐植性物質抽出液ＩとＩＩは、いずれも液状物質であり、腐植性物質が均質化されているので、廃水処理プロセスに使用した際に、処理効率を安定化させる効果がある。   Such humic substance extracts I and II are both liquid substances, and the humic substances are homogenized. Therefore, when used in a wastewater treatment process, there is an effect of stabilizing the treatment efficiency.

＜濃縮処理剤＞
本発明の濃縮処理剤は、上記の腐植性物質抽出液Ｉ又はＩＩを、膜処理などの濃縮処理によって濃縮することにより得られる。図２には濃縮処理剤ＩとＩＩの製造工程が示されている。製造工程は図２に示すように、図１の製造工程に濃縮工程４が付加されている。 <Concentrated treatment agent>
The concentration treatment agent of the present invention can be obtained by concentrating the humic substance extract I or II by concentration treatment such as membrane treatment. FIG. 2 shows a manufacturing process of the concentration treatment agents I and II. As shown in FIG. 2, the manufacturing process includes a concentration process 4 added to the manufacturing process of FIG.

このように濃縮すると、腐植性物質が高密度化されて、添加量を少なくできるので好ましい。   Concentration in this way is preferable because the humic substance is densified and the amount added can be reduced.

＜固形処理剤＞
本発明の固形処理剤は、上記の腐植性物質抽出液に、酸を添加してｐＨ４以下で析出する固形物からなる。酸としては、硫酸、塩酸又は硝酸から選ばれる鉱酸の少なくとも一種を用いることが好ましい。 <Solid processing agent>
The solid treatment agent of the present invention comprises a solid substance which is precipitated at pH 4 or less by adding an acid to the above humic substance extract. As the acid, it is preferable to use at least one mineral acid selected from sulfuric acid, hydrochloric acid or nitric acid.

本発明の固形処理剤の製造工程の一例について図３に基づいて説明する。   An example of the manufacturing process of the solid processing agent of this invention is demonstrated based on FIG.

図３において、抽出工程１、ｐＨ調整工程２、添加工程３は図１の方法と同じである。この方法では、電解工程５が導入されており、水をアルカリと酸に電解し、アルカリ液はｐＨ調整工程２で使用する。また酸は添加工程３で使用する。この酸の添加によってｐＨ４以下にすると、固形物が析出する。固形物はろ過工程６によって固液分離され、固形物はそのまま、あるいは必要により洗浄処理して本発明の固形処理剤となる。また固液分離によって生じる液体は必要により膜処理７が施され、濃縮されて電解工程５に戻される。   In FIG. 3, the extraction step 1, the pH adjustment step 2, and the addition step 3 are the same as the method of FIG. In this method, an electrolysis step 5 is introduced, water is electrolyzed into an alkali and an acid, and an alkaline solution is used in the pH adjustment step 2. The acid is used in the addition step 3. When the pH is lowered to 4 or less by the addition of this acid, a solid is precipitated. The solid matter is separated into solid and liquid by the filtration step 6, and the solid matter is used as it is or after washing as necessary to obtain the solid treatment agent of the present invention. The liquid produced by the solid-liquid separation is subjected to a membrane treatment 7 as necessary, concentrated and returned to the electrolysis step 5.

＜有機性廃水の処理方法＞
図６には、本発明に係る有機性廃水の処理方法の一例を示すフロー図が示されている。 <Method of treating organic wastewater>
FIG. 6 is a flowchart showing an example of the method for treating organic wastewater according to the present invention.

有機性物質を含む流入水（下水など）は、スクリーン１０で夾雑物が除去され、最初沈殿池１１で固液分離される。最初沈殿池１１の上済み液はエアレーションタンク１２に送られ、微生物処理される。エアレーションタンク１２から送られる汚泥と廃水の懸濁液は最終沈殿池１３に送られ、固液分離される。最終沈殿池１３で沈降した汚泥はエアレーションタンク１２に返送され、その返送汚泥の一部は余剰汚泥として除去される。   Inflow water (such as sewage) containing an organic substance is subjected to removal of impurities by the screen 10 and is first subjected to solid-liquid separation in the settling tank 11. First, the top solution of the settling basin 11 is sent to the aeration tank 12 for microbial treatment. The sludge and wastewater suspension sent from the aeration tank 12 is sent to the final sedimentation tank 13 for solid-liquid separation. The sludge settled in the final sedimentation tank 13 is returned to the aeration tank 12, and a part of the returned sludge is removed as excess sludge.

本発明において、廃水処理工程には、気液接触工程と汚泥処理工程を備えていればよく、図６の例で言えば、気液接触工程はエアレーションタンク１２である。汚泥処理工程はスクリーン１０から最初沈殿池１１にいたる処理系、最初沈殿池１１からエアレーションタンク１２にいたる処理系、エアレーションタンク１２から最終沈殿池１３にいたる処理系、最終沈殿池１３からエアレーションタンク１２に汚泥返送される処理系、更には図示していないが、最終沈殿池１３から汚泥濃縮槽にいたる処理系も含む。また汚泥返送される処理系に汚泥培養槽（馴養槽ともいう）が設けられる場合、その汚泥培養槽を含む。   In the present invention, the wastewater treatment process may include a gas-liquid contact process and a sludge treatment process. In the example of FIG. 6, the gas-liquid contact process is the aeration tank 12. The sludge treatment process includes a treatment system from the screen 10 to the first sedimentation basin 11, a treatment system from the first sedimentation basin 11 to the aeration tank 12, a treatment system from the aeration tank 12 to the final sedimentation basin 13, and a final precipitation basin 13 to the aeration tank 12. In addition, although not shown in the figure, a processing system from the final sedimentation tank 13 to the sludge concentration tank is also included. Moreover, when a sludge culture tank (it is also called an acclimatization tank) is provided in the processing system which returns sludge, the sludge culture tank is included.

本発明では、上記の腐植性物質抽出液、固形処理剤又は濃縮処理剤を、上記の気液接触工程及び／もしくは汚泥処理工程に注入あるいは添加することを特徴とする。また上記の腐植性物質抽出液、固形処理剤又は濃縮処理剤を任意に組みあせて添加あるいは注入することもできる。   The present invention is characterized by injecting or adding the humic substance extract, the solid treatment agent or the concentration treatment agent into the gas-liquid contact step and / or the sludge treatment step. Also, the above humic substance extract, solid treatment agent or concentration treatment agent can be arbitrarily combined and added or injected.

上記の腐植性物質抽出液を、該好気性生物学的処理施設にて発生する汚泥と容器内で３時間以上の平均水理学的な滞留時間をもって混合したのち、気液接触工程及び／もしくは汚泥処理工程に注入することも好ましいことである。このようにすると、発生汚泥量の抑制、悪臭発生の抑制、硝化速度向上などの処理性能の向上という効果がある。   After mixing the above humic substance extract with sludge generated in the aerobic biological treatment facility with an average hydraulic residence time of 3 hours or more in the container, the gas-liquid contact step and / or sludge It is also preferable to inject into the processing step. If it does in this way, there exists an effect of improvement of processing performance, such as suppression of the amount of generated sludge, suppression of bad smell generation, and improvement of nitrification speed.

以下に、本発明の実施例を説明するが、本発明はかかる実施例によって限定されない。   Examples of the present invention will be described below, but the present invention is not limited to such examples.

＜腐植性物質抽出液の製造＞
腐植性物質抽出液１
腐植質堆肥１部に対し、水５部（乾物重量比）を加えて攪拌、静置した上澄液を腐植性物質抽出液１とする。（実施例１および６の試料） <Manufacture of humic substance extract>
Humic substance extract 1
The supernatant obtained by adding 5 parts of water (dry matter weight ratio) to 1 part of the humic compost and stirring and allowing to stand is used as the humic substance extract 1. (Samples of Examples 1 and 6)

腐植性物質抽出液２〜５
泥炭質腐植土１部に対し、水５部（乾物重量比）を加えて攪拌、静置した上澄液を、腐植性物質抽出液２とする（実施例２、７の試料）。 Humic substance extracts 2-5
The supernatant obtained by adding 5 parts of water (weight ratio of dry matter) to 1 part of peat humus and stirring and allowing to stand is used as a humic substance extract 2 (samples of Examples 2 and 7).

腐植性物質抽出液２に、Ｍｇを表１のように添加したものを腐植性物質抽出液３とする（実施例３の試料）。   The humic substance extract 2 was prepared by adding Mg to the humus extract 2 as shown in Table 1 (sample of Example 3).

腐植性物質抽出液２に、Ｃａを表１のように添加したものを腐植性物質抽出液４とする（実施例４の試料）。   A solution obtained by adding Ca to the humic substance extract 2 as shown in Table 1 is referred to as a humic substance extract 4 (sample of Example 4).

腐植性物質抽出液２に、Ｆｅを表１のように添加したものを腐植性物質抽出液５とする（実施例５の試料）。   What added Fe to the humic substance extract 2 as shown in Table 1 is set as the humic substance extract 5 (sample of Example 5).

＜腐植性物質抽出液の酸当量＞
腐植性物質抽出液１〜５の酸当量を０．１Ｎ−ＮaＯＨ滴定法により測定し、その結果を表１に示す。 <Acid equivalent of humic substance extract>
The acid equivalents of the humic substance extracts 1 to 5 were measured by 0.1N-NaOH titration method, and the results are shown in Table 1.

＜実験内容＞
図６に示す装置を用いた。具体的には、上記のようにして得られた腐植性物質抽出液の効果を確認するため、流入下水試料に対して５Ｌのエアレーションタンクと沈殿槽をもつ実験装置を用いて検討した。 <Experiment details>
The apparatus shown in FIG. 6 was used. Specifically, in order to confirm the effect of the humic substance extract obtained as described above, an inflow sewage sample was examined using an experimental apparatus having a 5 L aeration tank and a sedimentation tank.

試料処理量５００ｍL／時、抽出液添加量（エアタン前）１ｍL／時とし、エアレーションタンク内温度を２０℃に設定した。   The sample throughput was 500 mL / hour, the extract addition amount (before air tanning) was 1 mL / hour, and the temperature in the aeration tank was set to 20 ° C.

＜評価＞
下記項目について以下に示す測定方法によって測定し、評価した。その結果を表１に示す。 <Evaluation>
The following items were measured and evaluated by the measurement methods shown below. The results are shown in Table 1.

汚泥発生量
（測定方法） ＳＳ：ＪＩＳ Ｋ０１０２ １４．１（懸濁物質）
（評価方法）
（余剰汚泥ＳＳ濃度[ｍｇ(ＳＳ)／L]×（１日平均の余剰汚泥引抜量[L／日]）＋（実験前後のＭＬＳＳ濃度差[ｍｇ(ＳＳ)／L]）×（エアレーションタンク容量[L]）÷（実験日数[日]） Sludge generation amount (measuring method) SS: JIS K0102 14.1 (suspended material)
(Evaluation methods)
(Excess sludge SS concentration [mg (SS) / L] × (average daily excess sludge withdrawal amount [L / day]) + (MLSS concentration difference before and after experiment [mg (SS) / L]) × (aeration tank Capacity [L]) ÷ (Experiment days [Day])

臭気
（測定方法）
含水率を８５％に調製した汚泥５０ｇを１６等分し、１Ｌのガラスビンに入れ、密封して３０℃の恒温槽に置く。このとき、ガラスビン内圧を一定に保持するため外気の連通している空気袋を外部に設ける。 Odor (measurement method)
50 g of sludge prepared to a moisture content of 85% is divided into 16 equal parts, placed in a 1 L glass bottle, sealed and placed in a thermostatic bath at 30 ° C. At this time, in order to keep the internal pressure of the glass bottle constant, an air bag communicating with outside air is provided outside.

（評価方法）
ガラスビン内部のガスを硫化水素測定用検知管にて測定する。このとき、硫化水素濃度が０．２ｐｐｍ以上となった場合、被測定ガスについて「硫化水素臭」があると表現し、０．２ｐｐｍ未満の場合は、「無臭」と表現する。 (Evaluation methods)
The gas inside the glass bottle is measured with a hydrogen sulfide measuring tube. At this time, when the hydrogen sulfide concentration is 0.2 ppm or more, the measurement gas is expressed as “hydrogen sulfide odor”, and when it is less than 0.2 ppm, it is expressed as “no odor”.

硝化速度
（測定方法）
エアレーションタンクより採取した汚泥混合液を２Ｌのビーカーに入れ、液温を２０℃として、攪拌しながら、エアレーションを行い、溶存酸素濃度を２ｍｇ／L以上に確保する。この状態で経過時間ごとに試料を採取し、亜硝酸性窒素濃度および硝酸性窒素濃度を分析する。また、試料の強熱減量（ＭＬＶＳＳ）も分析する。
強熱減量 ：ＪＩＳ Ｋ０１０２ １４．５
亜硝酸イオン：ＪＩＳ Ｋ０１０２ ４３．１
硝酸イオン ：ＪＩＳ Ｋ０１０２ ４３．２ Nitrification rate (measurement method)
The sludge mixed liquid collected from the aeration tank is put into a 2 L beaker, and the temperature of the liquid is set to 20 ° C., and aeration is performed while stirring to ensure a dissolved oxygen concentration of 2 mg / L or more. In this state, a sample is taken at every elapsed time and analyzed for nitrite nitrogen concentration and nitrate nitrogen concentration. The loss on ignition (MLVSS) of the sample is also analyzed.
Loss on ignition: JIS K0102 14.5
Nitrite ion: JIS K0102 43.1
Nitrate ion: JIS K0102 43.2

（評価方法）
ＮＯＸと経過時間との関係をプロットし、その傾きから硝化速度[ｍｇ(Ｎ)／ｇ(ＭＬＶＳＳ)・ｈｒ]を算出する。 (Evaluation methods)
Plotting the relationship between the NO X and the elapsed time is calculated nitrification rate from the slope [mg (N) / g ( MLVSS) · hr].

Figure 2007196172
Figure 2007196172

本発明に係る腐植性物質抽出液の製造工程の一例を示すフロー図。The flowchart which shows an example of the manufacturing process of the humic substance extract which concerns on this invention. 本発明に係る濃縮処理剤の製造工程の一例を示すフロー図The flowchart which shows an example of the manufacturing process of the concentration processing agent which concerns on this invention 本発明に係る固形処理剤の製造工程の一例を示すフロー図The flowchart which shows an example of the manufacturing process of the solid processing agent which concerns on this invention 抽出液滴定曲線を示す図Diagram showing the extraction droplet constant curve 腐植性物質抽出液のＩＲスペクトルを示す図Diagram showing IR spectrum of humic substance extract 本発明に係る有機性廃水の処理方法の一例を示すフロー図The flowchart which shows an example of the processing method of the organic wastewater which concerns on this invention

符号の説明Explanation of symbols

１：抽出工程
２：ｐＨ調整工程
３：添加工程
４：濃縮工程
５：電解工程
６：ろ過工程
７：膜処理
１０：スクリーン
１１：最初沈殿池
１２：エアレーションタンク
１３：最終沈殿池 1: Extraction process 2: pH adjustment process 3: Addition process 4: Concentration process 5: Electrolysis process 6: Filtration process 7: Membrane treatment 10: Screen 11: First sedimentation tank 12: Aeration tank 13: Final sedimentation tank

Claims (10)

腐植土、腐葉土、堆肥、泥炭又は泥炭質土壌から選ばれる少なくとも一種からなる腐植性物質からｐＨ７以上の水溶液で抽出した腐植性物質抽出液。   A humic substance extract extracted from an humic substance consisting of at least one selected from humus soil, humus soil, compost, peat or peat-like soil with an aqueous solution having a pH of 7 or more. 腐植土、腐葉土、堆肥、泥炭又は泥炭質土壌から選ばれる少なくとも一種からなる腐植性物質から抽出した腐植性物質抽出液であり、該腐植性物質抽出液がｐＨ３．０〜６．０間の酸当量が１０ｍｅｑ／Ｌ以上、液の風乾物の赤外線吸収スペクトル（ＩＲスペクトル）が３４００ｃｍ−１、１７００ｃｍ−１、１４００ｃｍ−１、１１００ｃｍ−１を中心としてプラスマイナス５０ｃｍ−１以内に吸収ピークを有することを特徴とする腐植性物質抽出液。 A humic substance extract extracted from a humic substance consisting of at least one selected from humus soil, humus soil, compost, peat or peat-like soil, and the humic substance extract is an acid between pH 3.0 and 6.0 equivalent of 10 meq / L or more, infrared absorption spectrum (IR spectrum) 3400 cm -1 wind dry matter of the liquid, 1700 cm -1, 1400 cm -1, to have an absorption peak within ± 50 cm -1 around the 1100 cm -1 Humic substance extract characterized by the following. 鉄化合物、マグネシウム化合物又はカルシウム化合物から選ばれる少なくとも一種の化合物を添加してなることを特徴とする請求項１又は２記載の腐植性物質抽出液。   The humic substance extract according to claim 1 or 2, wherein at least one compound selected from an iron compound, a magnesium compound or a calcium compound is added. 請求項１、２又は３記載の腐植性物質抽出液に、酸を添加してｐＨ４以下で析出する固形物からなる固形処理剤。   The solid processing agent which consists of a solid substance which adds an acid to the humic substance extract of Claim 1, 2, or 3, and precipitates at pH 4 or less. 前記酸が、硫酸、塩酸又は硝酸からなる鉱酸から選ばれる少なくとも一種であることを特徴とする請求項４記載の固形処理剤。   The solid treatment agent according to claim 4, wherein the acid is at least one selected from mineral acids consisting of sulfuric acid, hydrochloric acid or nitric acid. 請求項１、２又は３記載の腐植性物質抽出液を、ろ過処理によって分離された濃縮液からなる濃縮処理剤。   The concentration processing agent which consists of the concentrate which separated the humic substance extract of Claim 1, 2, or 3 by the filtration process. 請求項１、２又は３記載の腐植性物質抽出液を、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。   A method for treating organic wastewater, comprising injecting the humic substance extract according to claim 1, 2 or 3 into a gas-liquid contact step and / or a sludge treatment step. 請求項４又は５記載の固形処理剤を、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。   A method for treating organic wastewater, comprising injecting the solid treatment agent according to claim 4 or 5 into a gas-liquid contact step and / or a sludge treatment step. 請求項６記載の濃縮処理剤を、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。   A method for treating organic wastewater, comprising injecting the concentrated treatment agent according to claim 6 into a gas-liquid contact step and / or a sludge treatment step. 請求項１、２又は３記載の腐植性物質抽出液を、好気性生物学的処理施設にて発生する汚泥と容器内で３時間以上の平均水理学的な滞留時間をもって混合したのち、気液接触工程及び／もしくは汚泥処理工程に注入することを特徴とする有機性廃水の処理方法。

After mixing the humic substance extract according to claim 1, 2 or 3 with sludge generated in an aerobic biological treatment facility with an average hydraulic residence time of 3 hours or more in the container, the gas-liquid A method for treating organic wastewater, which is injected into a contact step and / or a sludge treatment step.

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