二重の高塩分と硫化物のストレス下での硫化物ベースの脱窒化を促進する:機能的な微生物における互換性のある溶液による代謝適応
Hanshi Wang1, Zihan Tian1, Qinbiao Jiang1
1Zhejiang Key Laboratory of Pollution Control for Port-Petrochemical Industry, Zhejiang Ocean University, Zhoushan, 316022, China.
Journal of environmental management
|February 13, 2026
まとめ
グリシンベタイン,トレハロース,マンニトールなどのバイオ刺激剤は,高塩分と硫化物のストレス下では硫黄の自己栄養失調 (SAD) を強化します. これらの互換性のある溶液は窒素の除去を大幅に促進し,下水処理システムの改善の可能性を提供します.
科学分野:
- 環境微生物学 環境微生物学
- バイオテクノロジー バイオテクノロジー
背景:
- 硫黄のオートロフィック脱窒化 (SAD) は,排水中の窒素除去に不可欠です.
- 高塩分と硫化物の毒性は,SADシステムの効率化に重大な課題をもたらします.
研究 の 目的:
- 双重ストレス条件下におけるSADのパフォーマンスを向上させるためのバイオシミュラントの可能性を調査する.
- 塩分と硫化物の毒性を軽減するための最適な生物刺激剤とその有効濃度を特定する.
主な方法:
- 1 mg L-1の10種類のバイオシミュラントのスクリーニング.
- 互換性のある溶液 (グリシンベタイン,トレハロース,マンニトール) をより高い濃度 (10-100 mg L-1) で評価する.
- ストレス耐性メカニズムを解明するためのメタゲノミクス分析.
主要な成果:
- 互換性のある溶液は,トータル窒素 (TN) 除去率を3倍以上大幅に高めました.
- マニトールは100 mgのL-1で,最も高いTN除去率 (9.38 mg L-1 h-1) を達成しました.
- メタゲノミクス分析により,オスモス保護,強化された異性栄養脱酸化,抗酸化防御を含むメカニズムが明らかになった.
結論:
- 外因的適合溶液は,SADシステムにおける高塩分と硫化物の毒性による二重ストレスを効果的に軽減します.
- 生物刺激剤の適用は,SADプロセスの効率と回復力を向上させる大きな可能性を示しています.
関連する概念動画
Preparation and Reactions of Sulfides
5.8K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.8K
Structure and Nomenclature of Thiols and Sulfides
5.8K
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry,...
5.8K
Weak Base Solutions
25.5K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
25.5K
Strong Acid and Base Solutions
36.2K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
36.2K
Responses to Heat and Cold Stress
14.9K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
14.9K
Composition of Polyprotic Acid Solutions as a Function of pH
871
Polyprotic acids of the type H2M constitute two ionizable protons. As a result, on titration with a base, they exhibit two equivalence points in the titration curve. During titration, the species H2M, HM−, and M2− will be present in the solution at different points. The fractions of H2M, HM−, and M2− present at the various instances of the titration are denoted by α0, α1, and α2, respectively.
A graph with the alpha values is plotted against the volume of...
A graph with the alpha values is plotted against the volume of...
871


