JPH1094791A - Method for removing hydrogen sulfide in building waste water - Google Patents
Method for removing hydrogen sulfide in building waste waterInfo
- Publication number
- JPH1094791A JPH1094791A JP25307296A JP25307296A JPH1094791A JP H1094791 A JPH1094791 A JP H1094791A JP 25307296 A JP25307296 A JP 25307296A JP 25307296 A JP25307296 A JP 25307296A JP H1094791 A JPH1094791 A JP H1094791A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen sulfide
- waste water
- building
- peroxide
- wastewater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ビル廃水中の硫化
水素の除去に関するものである。更に詳しくは、ビル廃
水中の硫化水素を迅速に少ない薬注量で除去する方法で
ある。The present invention relates to the removal of hydrogen sulfide from building wastewater. More specifically, it is a method for quickly removing hydrogen sulfide from building wastewater with a small chemical injection amount.
【０００２】[0002]
【従来の技術】都市の市街地のビルの高層化に伴い地下
街を有するビルが増えている。こうした地下街を有する
ビルの廃水は一度地下の廃水槽（以下ビルピットと記
す）に貯蔵され、そこからポンプによって公共下水道へ
放流される。また、ホテル、結婚式場のように食品を加
工する業者は、廃水のＢＯＤ等が高いため水処理を行っ
て公共下水道へ放流するが、この時にも廃水は一時廃水
槽に貯蔵され、廃水処理後公共下水道へ放流される。ビ
ルピットには厨房、洗面手洗い、浴室等からの廃水が貯
められる。この廃水には硫酸塩等の無機物、硫黄化合物
を含む有機化合物が含まれているが、貯溜しているうち
に廃水中の有機物等の腐敗が進行する。この時廃水中に
存在する硫酸還元菌は、廃水中の硫酸塩を硫化水素に還
元し増殖する。その結果、廃水は嫌気化し硫酸還元菌の
増殖に加速がかかり廃水中の硫化水素の含有量は更に増
大し気相に放散される。放散された硫化水素は、毒性の
ある不快な物質でマンホールの隙間等からビル街へ拡散
し悪臭問題となっている。更にこの硫化水素は気相中の
硫黄酸化細菌により酸化されミスト中に溶け込み硫酸を
生成する。こうして生成した硫酸はコンクリートや金属
を腐蝕し建築物の構造に致命的な欠陥をもたらす原因と
なっている。2. Description of the Related Art Buildings with underground shopping centers are increasing along with the rise of urban buildings. Wastewater from buildings with such underground malls is once stored in an underground wastewater tank (hereinafter referred to as a building pit), and then discharged to a public sewer by a pump. Food processing companies, such as hotels and wedding halls, treat wastewater and discharge it to public sewers due to the high BOD of wastewater. At this time, the wastewater is temporarily stored in a wastewater tank. Released into the public sewer. The building pit stores wastewater from kitchens, washbasins, bathrooms, etc. This wastewater contains inorganic substances such as sulfates and organic compounds containing sulfur compounds, and while stored, the organic substances and the like in the wastewater decompose. At this time, the sulfate-reducing bacteria existing in the wastewater reduce the sulfate in the wastewater to hydrogen sulfide and proliferate. As a result, the wastewater is anaerobically accelerated to accelerate the growth of sulfate-reducing bacteria, and the content of hydrogen sulfide in the wastewater further increases and is released to the gas phase. Dissipated hydrogen sulfide is a toxic and unpleasant substance, which diffuses into the building through gaps in manholes and causes odor problems. Further, the hydrogen sulfide is oxidized by sulfur oxidizing bacteria in the gas phase and dissolves in the mist to form sulfuric acid. The sulfuric acid produced in this way corrodes concrete and metal, causing fatal defects in the structure of buildings.
【０００３】これら臭気の発生や構造物の腐蝕を防止す
る手段としては、活性炭に硫化水素を吸着させる活性炭
処理があるが、吸着量が飽和に達すると、新しい活性炭
に交換するか再生処理する必要があり、交換作業の煩雑
さと再生費用が高いなど経済性にも問題があった。他の
方法として担体に保持した生物の充填層を通過させ脱臭
する方法がある。しかしこの方法は装置が大きくなるこ
と及び生物の維持管理が難しいといった問題がある。更
に汚水のｐＨをアルカリ性にし硫化水素の放散を抑制す
る方法もあるが、これは硫化水素そのものを分解もしく
は除去するわけではないので、中和した際、硫化水素が
再発生したり、アルカリスケールが発生するなど充分な
処理とは言えない。As a means for preventing the generation of these odors and the corrosion of structures, there is an activated carbon treatment for adsorbing hydrogen sulfide on activated carbon. However, when the amount of adsorption reaches saturation, it is necessary to replace the activated carbon with new activated carbon or regenerate it. However, there is also a problem in economics such as complicated replacement work and high regeneration cost. As another method, there is a method of deodorizing by passing through a packed bed of organisms held on a carrier. However, this method has a problem that the apparatus becomes large and it is difficult to maintain and control the living things. There is also a method of making the pH of sewage alkaline and suppressing the emission of hydrogen sulfide.However, this does not decompose or remove hydrogen sulfide itself. It cannot be said that this is a sufficient process such as generation.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、ビル廃水中
の硫化水素を温和な条件で効率良く分解除去し、臭気の
拡散及び施設の腐蝕を防止する方法の提供を目的とする
ものである。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for efficiently decomposing and removing hydrogen sulfide in building wastewater under mild conditions to prevent odor diffusion and facility corrosion. .
【０００５】[0005]
【課題を解決するための手段】発明者等は、ビル廃水中
の硫化水素の除去方法を解決すべく鋭意研究した結果、
ビル廃水に、好ましくは滞留槽を曝気しながら、過酸化
物と金属塩を添加することによりビル廃水中の硫化水素
が効率的に除去できることを見いだし、本発明を完成し
た。すなわち、本発明はビル廃水中の硫化水素の処理に
おいて、好ましくは曝気しながら過酸化物と金属塩を添
加することを特徴とするビル廃水中の硫化水素の除去方
法である。Means for Solving the Problems The inventors have conducted intensive studies to solve the method of removing hydrogen sulfide from building wastewater,
The inventors have found that hydrogen sulfide in building wastewater can be efficiently removed by adding a peroxide and a metal salt to the building wastewater, preferably while aerating the residence tank, and completed the present invention. That is, the present invention is a method for removing hydrogen sulfide in building wastewater, which comprises adding a peroxide and a metal salt while preferably aerating in the treatment of hydrogen sulfide in building wastewater.
【０００６】本発明による方法の第一の利点は、気相に
放散された硫化水素を捕捉・除去するわけではなく液相
の硫化水素に対して作用するため、装置が簡便で小型化
できる点にある。すなわち、生物処理法は、生物を担持
させた充填相に硫化水素を含んだガスを流入するが、硫
化水素濃度が高い場合は、装置を大型化しなければなら
ず、更に生物の維持管理が煩雑であるという欠点を有し
ていた。しかしながら本発明方法によれば液相の硫化水
素に直接作用するためにその欠点を解決することが可能
となる。A first advantage of the method according to the present invention is that the apparatus operates simply on hydrogen sulfide in a liquid phase, instead of capturing and removing hydrogen sulfide released in a gas phase. It is in. In other words, in the biological treatment method, a gas containing hydrogen sulfide flows into the packed phase supporting the organism, but when the concentration of hydrogen sulfide is high, the apparatus must be enlarged, and the maintenance and management of the organism is complicated. Had the disadvantage that However, according to the method of the present invention, it is possible to solve the drawback since it directly acts on hydrogen sulfide in the liquid phase.
【０００７】第二の利点は、ビル廃水のｐＨをアルカリ
性とし、硫化水素の放散を抑制する方法では、硫化水素
自体を分解するわけではなく、硫化水素をＨＳ- 、Ｓ2-
のイオンにし、気相への放散を抑制するもので、中和す
ると硫化水素が再発生する。また、アルカリ剤によるス
ケールが発生するという欠点を有していた。しかしなが
ら本発明によれば、硫化水素を分解してしまうため効果
は充分で、しかも通常のビル廃水のｐＨ（６〜８）で処
理を行うことができ、更に本発明の処理を行うことによ
るｐＨの変動はないことから、放流時にｐＨを再調整す
る必要がなく、その欠点を解決することが可能になる。A second advantage is that the method of making the pH of building wastewater alkaline and suppressing the emission of hydrogen sulfide does not decompose the hydrogen sulfide itself, but converts the hydrogen sulfide into HS − and S 2−.
And suppresses emission to the gas phase. When neutralized, hydrogen sulfide is regenerated. In addition, there is a disadvantage that scale is generated by the alkali agent. However, according to the present invention, the effect is sufficient because hydrogen sulfide is decomposed, and the treatment can be performed at the pH (6 to 8) of ordinary building wastewater. Since there is no fluctuation in pH, it is not necessary to readjust the pH at the time of discharge, and the disadvantage can be solved.
【０００８】[0008]
【発明の実施の形態】つぎに本発明の方法を具体的に説
明する。本発明のビル廃水は、オフィスビル、レストラ
ン、結婚式場、マンション等より排出される廃水のこと
で具体的には、公道桝もしくは公共下水道へ放流される
以前の廃水が含まれる。本発明による方法では、一般的
には廃水のｐＨは６〜８でありｐＨの調整を必要とせず
処理を行える。しかしながらｐＨが９以上の場合は酸を
用いて所定のｐＨに調整後処理する。この時使用される
酸としては、硫酸、塩酸、硝酸、リン酸等の無機酸、蟻
酸、酢酸等の有機酸であり、単独またはそれらの組み合
わせが使用され得るが、硫酸、塩酸が好適に使用され
る。これらｐＨ調整剤とビル廃水との混合のためには、
攪拌混合槽、攪拌翼等の混合装置が使用できるが、ビル
廃水とｐＨ調整剤が混合できる装置であればいずれの方
法でも良い。ｐＨ調整にはｐＨコントローラーを使用す
ることにより本操作を自動化することができる。Next, the method of the present invention will be described specifically. The building wastewater of the present invention refers to wastewater discharged from office buildings, restaurants, wedding halls, condominiums, and the like, and specifically includes wastewater before being discharged to a public road basin or a public sewer. In the method according to the present invention, the pH of the wastewater is generally 6 to 8, and the treatment can be performed without adjusting the pH. However, when the pH is 9 or more, the mixture is adjusted to a predetermined pH with an acid and then treated. The acid used at this time is an inorganic acid such as sulfuric acid, hydrochloric acid, nitric acid, and phosphoric acid, and an organic acid such as formic acid and acetic acid, and may be used alone or in combination, but sulfuric acid and hydrochloric acid are preferably used. Is done. In order to mix these pH adjusters and building wastewater,
Although a mixing device such as a stirring mixing tank and a stirring blade can be used, any method may be used as long as it can mix building wastewater and a pH adjuster. This operation can be automated by using a pH controller for pH adjustment.
【０００９】続いてｐＨが調整された廃水に過酸化物と
金属塩を添加する。本発明による方法で使用される過酸
化物としては、過酸化水素、過酢酸、過硫酸塩、過炭酸
塩、過ホウ素酸塩、その他無機、有機の過酸化物が使用
し得るが、好ましくは過酸化水素が使用される。過酸化
物の使用量は、硫化水素量に対して０．５〜２０倍モ
ル、好ましくは０．５〜１０倍モル使用する。過酸化水
素は３５重量％、６０重量％の濃度のものが市販されて
いるが、これをそのまま使用しても良く、また希釈して
使用しても良い。Subsequently, a peroxide and a metal salt are added to the wastewater whose pH has been adjusted. As the peroxide used in the method according to the present invention, hydrogen peroxide, peracetic acid, persulfate, percarbonate, perborate, and other inorganic and organic peroxides can be used, but it is preferable. Hydrogen peroxide is used. The peroxide is used in an amount of 0.5 to 20 moles, preferably 0.5 to 10 moles, per mole of the hydrogen sulfide. Hydrogen peroxide having a concentration of 35% by weight or 60% by weight is commercially available, but it may be used as it is or may be used after being diluted.
【００１０】本発明による方法で使用される金属塩とし
ては、鉄、マンガン、銅、亜鉛、銀、クロム、コバル
ト、ニッケル、スズ、鉛等の硫酸塩、硝酸塩、ハロゲン
化物、過塩素酸塩、水酸化物、等の無機塩、シュウ酸
塩、蟻酸塩等の有機塩、酸化物等が例示され、無水塩、
含水塩の何れでも良い。更に鉄塩としてはポリ硫酸第二
鉄等も使用できる。金属塩の使用量は、金属原子の重量
として流入する廃水に対して０．０１ｍｇ／Ｌ〜２０ｍ
ｇ／Ｌ、好ましくは０．０５ｍｇ／Ｌ〜１５ｍｇ／Ｌ、
更に好ましくは０．１ｍｇ／Ｌ〜１０ｍｇ／Ｌの濃度に
なる量である。過酸化物と金属塩は同時にビルピットに
添加しても良いしあらかじめ混合したものを添加しても
良い。また、廃水の流入配管から添加しても良い。The metal salts used in the method according to the present invention include sulfates, nitrates, halides, perchlorates, such as iron, manganese, copper, zinc, silver, chromium, cobalt, nickel, tin and lead. Inorganic salts such as hydroxides, oxalates, organic salts such as formate, oxides and the like are exemplified, and anhydrous salts,
Any of hydrous salts may be used. Further, as the iron salt, ferric polysulfate can be used. The amount of the metal salt used is 0.01 mg / L to 20 m with respect to the wastewater flowing in as the weight of metal atoms.
g / L, preferably 0.05 mg / L to 15 mg / L,
The amount is more preferably 0.1 mg / L to 10 mg / L. The peroxide and the metal salt may be added to the building pit at the same time, or may be added in a premixed state. Also, the wastewater may be added from an inflow pipe.
【００１１】更に、過酸化物、金属塩を添加する際にビ
ルピットを曝気すると好ましい。曝気装置は、ディフュ
ーザー方式、もしくはエジェクター方式等が使用し得る
が、曝気装置であればいずれの方法でも良い。本発明に
よる方法を効率的に行うために、過酸化物、金属塩を添
加する際、ビル廃水との混合のために攪拌することが好
ましいが、その際用いられる攪拌方法としては、攪拌混
合槽、攪拌翼、インラインミキサー等ビル廃水と過酸化
物、金属塩が混合できる方法であればいずれの方法でも
良い。薬剤の添加方法としては、ダイヤフラム式、プラ
ンジャー式の定量ポンプ等薬品を正確に供給できる方式
であればいずれの方法でも良い。Further, it is preferable to aerate the building pit when adding a peroxide or a metal salt. As the aeration device, a diffuser type, an ejector type, or the like can be used, but any method may be used as long as it is an aeration device. In order to efficiently carry out the method according to the present invention, when adding peroxides and metal salts, it is preferable to stir for mixing with building wastewater. Any method may be used as long as it can mix building waste water with peroxides and metal salts, such as stirring blades and in-line mixers. As a method of adding the drug, any method such as a diaphragm type or a plunger type metering pump may be used as long as it can supply the drug accurately.
【００１２】[0012]
【実施例】次に本発明の方法を実施例により更に具体的
に説明する。但し、本発明はこれらの実施例によって限
定されるものではない。 比較例１ 硫化水素２０ｍｇ／Ｌを含有するｐＨ６．８のビルピッ
トに滞留しているビル廃水１００ｍｌに、７重量％の過
酸化水素水溶液を廃水に対し１００％過酸化水素として
３０ｍｇ／Ｌとなる量（４２．９ｍｇ：硫化水素の１．
５倍モル）を添加し、液相の硫化水素の濃度の経時変化
を酢酸鉛試験紙を用いた比色法によって測定した。結果
を表１に示す。 実施例１ 金属塩として鉄（ＩＩＩ）イオンが５ｍｇ／Ｌとなる量
の塩化第二鉄六水和物を２．４ｍｇ添加した他は、比較
例１と同様に処理を行った。結果を表１に示す。 実施例２ 金属塩としてマンガン（ＩＩ）イオンが５ｍｇ／Ｌとな
る量の硝酸マンガン六水和物を２．６ｍｇ添加した他
は、比較例１と同様に処理を行った。結果を表１に示
す。 実施例３ 金属塩として銅イオンが５ｍｇ／Ｌとなる量の硫酸銅五
水和物を２．０ｍｇ添加した他は、比較例１と同様に処
理を行った。結果を表１に示す。 実施例４ 金属塩として亜鉛イオンが５ｍｇ／Ｌとなる量の塩化亜
鉛１．０ｍｇを添加した他は、比較例１と同様に処理を
行った。結果を表１に示す。 実施例５ 金属塩として銀イオンが５ｍｇ／Ｌとなる量の硝酸銀を
０．８ｍｇ添加した他は、比較例１と同様に処理を行っ
た。結果を表１に示す。Next, the method of the present invention will be described more specifically with reference to examples. However, the present invention is not limited by these examples. Comparative Example 1 In 100 ml of building waste water retained in a building pit having a pH of 6.8 containing 20 mg / L of hydrogen sulfide, a 7% by weight aqueous solution of hydrogen peroxide was converted to 30 mg / L as 100% hydrogen peroxide with respect to the waste water. (42.9 mg: 1.
(5 times mol) was added, and the change over time in the concentration of hydrogen sulfide in the liquid phase was measured by a colorimetric method using lead acetate test paper. Table 1 shows the results. Example 1 A treatment was performed in the same manner as in Comparative Example 1, except that 2.4 mg of ferric chloride hexahydrate was added as an amount of iron (III) ions to be 5 mg / L as a metal salt. Table 1 shows the results. Example 2 The same treatment as in Comparative Example 1 was performed, except that 2.6 mg of manganese nitrate hexahydrate was added as a metal salt so that manganese (II) ions became 5 mg / L. Table 1 shows the results. Example 3 A treatment was performed in the same manner as in Comparative Example 1, except that 2.0 mg of copper sulfate pentahydrate was added as a metal salt so that copper ions became 5 mg / L. Table 1 shows the results. Example 4 A treatment was performed in the same manner as in Comparative Example 1, except that 1.0 mg of zinc chloride was added as a metal salt so that zinc ions became 5 mg / L. Table 1 shows the results. Example 5 The same treatment as in Comparative Example 1 was performed, except that 0.8 mg of silver nitrate was added as a metal salt so that silver ions became 5 mg / L. Table 1 shows the results.
【００１３】実施例６ 金属塩としてクロムイオンが５ｍｇ／Ｌとなる量の硝酸
クロム九水和物を３．９ｍｇ添加した他は、比較例１と
同様に処理を行った。結果を表１に示す。 実施例７ 金属塩としてコバルトイオンが５ｍｇ／Ｌとなる量の塩
化コバルト六水和物を２．０ｍｇ添加した他は、比較例
１と同様に処理を行った。結果を表１に示す。 実施例８ 金属塩としてニッケルイオンが５ｍｇ／Ｌとなる量の硝
酸ニッケル六水和物を２．５ｍｇ添加した他は、比較例
１と同様に処理を行った。結果を表１に示す。 実施例９ 金属塩としてスズイオンが５ｍｇ／Ｌとなる量の塩化ス
ズ五水和物を１．５ｍｇ添加した他は、比較例１と同様
に処理を行った。結果を表１に示す。 実施例１０ 金属塩として鉛イオンが５ｍｇ／Ｌとなる量の酢酸鉛三
水和物を０．９ｍｇ添加した他は、比較例１と同様に処
理を行った。結果を表１に示す。 実施例１１ 金属塩として鉄（ＩＩ）イオンが５ｍｇ／Ｌとなる量の
塩化第一鉄四水和物を１．８ｍｇ添加した他は、比較例
１と同様に処理を行った。結果を表１に示す。 比較例２ 過酸化水素、金属塩を添加せずに、そのまま放置した結
果を表１に示す。Example 6 The same treatment as in Comparative Example 1 was carried out except that 3.9 mg of chromium nitrate nonahydrate was added as a metal salt so that chromium ions became 5 mg / L. Table 1 shows the results. Example 7 The same treatment as in Comparative Example 1 was carried out, except that 2.0 mg of cobalt chloride hexahydrate was added as an amount of cobalt ion to be 5 mg / L as a metal salt. Table 1 shows the results. Example 8 The same treatment as in Comparative Example 1 was performed except that 2.5 mg of nickel nitrate hexahydrate was added as a metal salt so that nickel ions became 5 mg / L. Table 1 shows the results. Example 9 The same treatment as in Comparative Example 1 was carried out, except that 1.5 mg of tin chloride pentahydrate was added in an amount of 5 mg / L of tin ions as a metal salt. Table 1 shows the results. Example 10 A treatment was performed in the same manner as in Comparative Example 1, except that 0.9 mg of lead acetate trihydrate was added as a metal salt so that lead ion became 5 mg / L. Table 1 shows the results. Example 11 The same treatment as in Comparative Example 1 was performed, except that 1.8 mg of ferrous chloride tetrahydrate was added as an amount of iron (II) ions to be 5 mg / L as a metal salt. Table 1 shows the results. Comparative Example 2 Table 1 shows the results of standing without adding hydrogen peroxide and a metal salt.
【００１４】 表１ 廃水中硫化水素（ｍｇ／Ｌ）の経時変化 経過時間（分） １ ５ ６０ １８０ ────────────────────────────── 比較例１ ４ １ ０ ２ 実施例１ ３ ０ ０ ０ 実施例２ ３ ０ ０ ０ 実施例３ ０ ０ ０ ０ 実施例４ ３ ０ ０ ０ 実施例５ １ ０ ０ ０ 実施例６ ３ ０ ０ ０ 実施例７ ２ ０ ０ ０ 実施例８ ３ ０ ０ ０ 実施例９ ３ ０ ０ ０ 実施例１０ ３ ０ ０ ０ 実施例１１ ３ ０ ０ ０ 比較例２ ２０ ２１ ２８ ３０ ──────────────────────────────Table 1 Change over time in hydrogen sulfide (mg / L) in wastewater Elapsed time (minutes) 1 60 60 180 ──────────────────────── ────── Comparative Example 1 4 1 0 2 Example 1 3 0 0 0 Example 2 3 0 0 0 Example 3 0 0 0 0 Example 4 3 0 0 0 Example 5 5 0 0 0 0 Example 6 3 00 0 Example 7 2 0 0 0 Example 8 3 0 0 0 Example 9 3 0 0 0 Example 10 3 0 0 0 Example 1 1 3 0 0 0 Comparative example 2 20 21 28 30 ───────────────────────────
【００１５】実施例１２ 硫化水素２５ｍｇ／Ｌを含有するｐＨ７．２のビルピッ
トに滞留しているビル廃水１００ｍｌに、７重量％の過
酸化水素水溶液を廃水に対し１００％過酸化水素として
５０ｍｇ／Ｌとなる量（７１．４ｍｇ：硫化水素の２倍
モル）と塩化第二鉄六水和物を鉄（ＩＩＩ）イオンが
０．１ｍｇ／Ｌとなる量（０．０５ｍｇ）添加し、硫化
水素の濃度の経時変化を見た。結果を表２に示す。 実施例１３ 鉄（ＩＩＩ）イオンが１ｍｇ／Ｌとなる量（０．４８ｍ
ｇ）に変えた他は、実施例１２と同様に処理を行った。
結果を表２に示す。 実施例１４ 鉄（ＩＩＩ）イオンが１０ｍｇ／Ｌとなる量（４．８４
ｍｇ）に変えた他は、実施例１２と同様に処理を行っ
た。結果を表２に示す。Example 12 To 100 ml of building waste water retained in a building pit having a pH of 7.2 containing 25 mg / L of hydrogen sulfide, a 7% by weight aqueous solution of hydrogen peroxide was added as 100% hydrogen peroxide to the waste water at 50 mg / L. (71.4 mg: twice as much as hydrogen sulfide) and ferric chloride hexahydrate in an amount (0.05 mg) such that the iron (III) ion becomes 0.1 mg / L, Changes in the concentration over time were observed. Table 2 shows the results. Example 13 Amount of iron (III) ion to be 1 mg / L (0.48 m
Except having changed to g), it carried out similarly to Example 12.
Table 2 shows the results. Example 14 Amount (4.84) at which iron (III) ion becomes 10 mg / L
The same treatment as in Example 12 was carried out except that the amount was changed to mg). Table 2 shows the results.
【００１６】 表２ 廃水中硫化水素（ｍｇ／Ｌ）の経時変化 経過時間（分） １ ５ ６０ １８０ ────────────────────────────── 実施例１２ ２ １ ０ ０ 実施例１３ ２ ０ ０ ０ 実施例１４ ２ ０ ０ ０ ────────────────────────────── 以上のように金属塩の添加量は非常に少量で効果が得ら
れる。Table 2 Temporal change of hydrogen sulfide (mg / L) in wastewater Elapsed time (minutes) 15 60 180 ──────────────────────── {Example 12 12 0 0 Example 13 2 00 0 Example 14 20 00 0}効果 As described above, the effect can be obtained with a very small addition amount of the metal salt.
【００１７】実施例１５ 硫化水素１０ｍｇ／Ｌを含有するピットに滞留している
ビル廃水１００ｍｌを、ｐＨ５に調整し、５重量％の過
酸化水素水溶液６０ｍｇを廃水に対し１００％過酸化水
素として３０ｍｇ／Ｌとなる量（６０ｍｇ：硫化水素の
３倍モル）と硫酸亜鉛を亜鉛イオンが２．５ｍｇ／Ｌと
なる量（１．１ｍｇ）添加し、硫化水素の濃度の経時変
化を見た。結果を表３に示す。 実施例１６ ｐＨを７にした他は、実施例１５と同様に処理した。結
果を表３に示す。 実施例１７ ｐＨを９にした他は、実施例１５と同様に処理した。結
果を表３に示す。 比較例３ ｐＨを３にした他は、実施例１５と同様に処理した。結
果を表３に示す。 比較例４ ｐＨを１１にした他は、実施例１５と同様に処理した。
結果を表３に示す。Example 15 100 ml of building waste water retained in a pit containing 10 mg / L of hydrogen sulfide was adjusted to pH 5, and 60 mg of a 5% by weight aqueous hydrogen peroxide solution was added to 30 mg of the waste water as 100% hydrogen peroxide. / L (60 mg: 3 times the molar amount of hydrogen sulfide) and zinc sulfate (2.5 mg / L) (1.1 mg) were added, and the concentration of hydrogen sulfide was changed over time. Table 3 shows the results. Example 16 Except having changed pH to 7, it processed like Example 15. Table 3 shows the results. Example 17 The same treatment as in Example 15 was carried out except that the pH was changed to 9. Table 3 shows the results. Comparative Example 3 The same treatment as in Example 15 was carried out except that the pH was changed to 3. Table 3 shows the results. Comparative Example 4 The same treatment as in Example 15 was carried out except that the pH was changed to 11.
Table 3 shows the results.
【００１８】 表３ 廃水中硫化水素（ｍｇ／Ｌ）の経時変化 経過時間（分） ｐＨ １ ５ ６０ ────────────────────────────── 実施例１５ ５ １ ０ ０ 実施例１６ ７ １ ０ ０ 実施例１７ ９ １ ０ ０ 比較例３ ３ ２ １ １ 比較例４ １１ ２ ０ ０ ────────────────────────────── 以上のように本発明はｐＨ５〜９の範囲で反応速度が最
大となる。Table 3 Temporal change of hydrogen sulfide (mg / L) in wastewater Elapsed time (minutes) pH 1560 ──────────────────────── {Example 15 5 10 0 0 Example 16 7 10 0 0 Example 17 9 10 0 0 Comparative example 3 3 2 1 1 Comparative example 4 11 2 0 0}よ う As described above, in the present invention, the reaction rate is maximized in the pH range of 5 to 9.
【００１９】以下のビルピットに対して実施を行った。
ビルピット中の廃水の平均の硫化水素濃度は３０ｍｇ／
Ｌであり、ｐＨの平均は６．８であった。また水温は２
５℃であった。ビルピットの容積は３０ｍ3 であり平均
して８ｍ3 ／ｈの廃水が流入する。 実施例１９ ビルピットに鉄（ＩＩＩ）イオンが流入水に対して５ｍ
ｇ／Ｌとなる量の３７重量％の塩化第二鉄を５．２ｇ／
ｍｉｎの速度で添加し、流入配管中から３５重量％過酸
化水素溶液を１３．７ｇ／ｍｉｎの速度で添加した。結
果を表４に示す。 実施例２０ ビルピットをエジェクター方式の曝気装置で曝気した他
は、実施例１９と同様に処理した。結果を表４に示す。 実施例２１ 鉄（ＩＩＩ）イオンのかわりに亜鉛イオンが流入水に対
して２．５ｍｇ／Ｌとなる量の５０重量％の塩化亜鉛を
１．４ｇ／ｍｉｎの速度で添加した他は、実施例２０と
同様に処理した。結果を表４に示す。 比較例４ 薬剤を添加せずに曝気のみを行った。結果を表４に示
す。The following building pit was implemented.
The average hydrogen sulfide concentration of wastewater in the building pit is 30 mg /
L and the average pH was 6.8. The water temperature is 2
5 ° C. The volume of the building pit is 30 m 3 , and on average 8 m 3 / h of wastewater flows in. Example 19 Iron (III) ions in a building pit 5 m from inflow water
g / L of 37% by weight of ferric chloride in 5.2 g / L
min, and a 35% by weight hydrogen peroxide solution was added from the inlet pipe at a rate of 13.7 g / min. Table 4 shows the results. Example 20 The same treatment as in Example 19 was carried out except that the building pit was aerated with an ejector type aerator. Table 4 shows the results. Example 21 The procedure of Example 21 was repeated, except that zinc ion was added at a rate of 1.4 g / min in an amount of 2.5 mg / L of zinc ion to the influent water instead of iron (III) ion. Treated as in 20. Table 4 shows the results. Comparative Example 4 Only aeration was performed without adding a drug. Table 4 shows the results.
【００２０】 表４ ビルピット気相中の硫化水素（ｐｐｍ） 平均 最大 最少 ─────────────────────────── 実施例１９ ４０ ８０ ５ 実施例２０ １５ ２５ ０ 実施例２１ １２ ３０ ０ 比較例４ １２０ ５００＜ ５０ ─────────────────────────── 以上のように薬液の添加とビルピットの曝気を同時に行
えば、効果は更に高まることがわかった。Table 4 Hydrogen sulfide (ppm) in the gas phase of the building pit Average Maximum Minimum 例 Example 19 40 80 5 Example 20 15 25 0 Example 21 12 30 0 Comparative Example 4 120 500 <50 ° As described above. It was found that the effect was further enhanced by simultaneously adding the chemical solution and aerating the building pit.
【００２１】[0021]
【発明の効果】本発明によれば、ビル廃水中の硫化水素
を短時間で除去できる。その結果、有害で不快臭を持つ
硫化水素の放散は大幅に抑えられ、更にセメント、金属
等の腐蝕を防止するための実用的な方法を提供できる。According to the present invention, hydrogen sulfide in building wastewater can be removed in a short time. As a result, the emission of harmful and unpleasant odorous hydrogen sulfide is greatly suppressed, and a practical method for preventing corrosion of cement, metal and the like can be provided.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 下村 正 東京都葛飾区新宿６丁目１番１号 三菱瓦 斯化学株式会社東京研究所内 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Tadashi Shimomura 6-1-1, Shinjuku, Katsushika-ku, Tokyo Mitsubishi Gas Chemical Co., Ltd. Tokyo Research Laboratory
Claims (7)
と金属塩を添加することを特徴とするビル廃水中の硫化
水素の除去方法。1. A method for removing hydrogen sulfide in building wastewater, comprising adding a peroxide and a metal salt to the building wastewater containing hydrogen sulfide.
銀、クロム、ニッケル、スズ、鉛からなる群から少なく
とも１種の硫酸塩、硝酸塩、ハロゲン化物、過塩素酸
塩、水酸化物である請求項１記載の方法。2. The method according to claim 1, wherein the metal salt is iron, copper, manganese, zinc,
The method according to claim 1, which is at least one sulfate, nitrate, halide, perchlorate, or hydroxide from the group consisting of silver, chromium, nickel, tin, and lead.
に対し、０．１〜１０ｍｇ／Ｌである請求項２記載の方
法。3. The method according to claim 2, wherein the amount of the metal salt is 0.1 to 10 mg / L based on the building wastewater as metal ions.
対し、０．５〜１０倍モルである請求項１記載の方法。4. The method according to claim 1, wherein the amount of the peroxide is 0.5 to 10 times the molar amount of hydrogen sulfide in the building wastewater.
載の方法。5. The method according to claim 1, wherein the peroxide is hydrogen peroxide.
方法。6. The method according to claim 1, wherein the treatment pH is 5 to 9.
の方法。7. The method according to claim 1, wherein the addition is performed while performing aeration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25307296A JPH1094791A (en) | 1996-09-25 | 1996-09-25 | Method for removing hydrogen sulfide in building waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25307296A JPH1094791A (en) | 1996-09-25 | 1996-09-25 | Method for removing hydrogen sulfide in building waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1094791A true JPH1094791A (en) | 1998-04-14 |
Family
ID=17246109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25307296A Pending JPH1094791A (en) | 1996-09-25 | 1996-09-25 | Method for removing hydrogen sulfide in building waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1094791A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006026723A3 (en) * | 2004-08-26 | 2008-01-17 | Aceto Corp | Odor abatement of organic waste |
-
1996
- 1996-09-25 JP JP25307296A patent/JPH1094791A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006026723A3 (en) * | 2004-08-26 | 2008-01-17 | Aceto Corp | Odor abatement of organic waste |
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