成果報告書詳細
管理番号20120000000288
タイトル*平成23年度中間年報 省水型・環境調和型水循環プロジェクト  水循環要素技術研究開発 高効率難分解性物質分解技術の開発うち難分解性化学物質分解(H21-H25)
公開日2013/5/25
報告書年度2011 - 2011
委託先名住友精密工業株式会社
プロジェクト番号P09011
部署名環境部
和文要約(1)実排水中1,4-ジオキサンの分解除去に関する研究開発
汚泥中の1,4-ジオキサン分解菌についての存在を明らかにし、連続処理ではHRTを0.5dayまで短縮してもジオキサンは低減できた。
(2)難分解性物質分解技術システム化に関する研究開発
難分解性物質を含有する工場排水の水量と水質を設定し、これを処理する複数のシステムについて、構成する各技術の課題やエネルギー消費量を検討した。エネルギー量は、設備の建設、運転時の電力と薬品、設備廃棄を含めたライフサイクルで計算した。
難分解性物質を含有する工場排水において、消費エネルギーを試算した結果、難分解性物質をMBR処理で分解することでAOP処理よりエネルギーを30%まで低減することができた。
(3)1,4-ジオキサンの分解特性に関する研究
1,4-ジオキサンに関する周辺情報を調査するとともに、オゾン処理、紫外線照射、曝気、過酸化水素添加等の各単独法と、促進酸化法としてのオゾンと紫外線照射の併用およびオゾンと過酸化水素添加の併用による1,4-ジオキサンの分解特性の把握を行い、促進酸化法の優位性を明らかにした。

(本編抜粋)
英文要約1. Decomposition of 1,4-dioxane by Advanced Oxidation Processes (AOPs) for
wastewater.
This experiment was performed using industrial waste water containing 1,4-dioxane and other component. The genotype of bacterium was investigated through the purification of bacterium from the waste water and cultivation. The detailed genotype of bacterium was cleared.
Furthermore, 1,4-dioxane was easily decomposed by biological treatment.This experiment was performed using 1,4-dioxane water.The concentration of 1,4-dioxane was reduced from 500mg/L to less than 10mg/L by biological treatment with short hydraulic retention time.
2. Decomposition system research for persistence substance.
Survey was carried out to treat wastewater which contains 1,4-dioxane. Energy consumption amount was calculated not only for the operation period, but for the construction of the treatment plant and for the breaking up of the plant after the life span.
The combination of high efficiency MBR and AOPs made a simple treatment system in this project so far. This system shows very small energy consumption ratio compared with other systems. Fluctuation of energy consumption by the influence of plant design factor or plant operation factor such as retention time in the MBR, air injection volume, water temperature, membrane life were investigated.
3. Study on degradation characteristics of 1,4-dioxane.
The references for the degradation of 1,4-dioxane were surveyed. The relating total references were 74, and those for AOPs including both O3/H2O2 and O3/UV were 43. Among those references, those of O3/H2O2 and O3/UV were 10 and 9, respectively. The experimental results for the degradation of 1,4-dioxane showed that the degradation ability of AOPs of O3/H2O2 and O3/UV were very effective, and that however, those of the individual methods of ozonation, UV irradiation, the addition of H2O2, and aeration were very limited. In the case of the initial concentration of 150 mg/L, 1,4-dioxane was completely degraded for 60 - 120 min reaction by both O3/H2O2 and O3/UV. During the period, DOC was gradually decreased, and BOD5 showed the maximum. Furthermore, the degradation ability of AOPs was increased by the changes of the initial concentration of 1,4-dioxane, the intensity of UV irradiation, and the amount of H2O2.
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