Facilitating effects of the synergy with zero-valent iron and peroxysulfate on the sludge anaerobic fermentation system: Combined biological enzyme, microbial community and fermentation mechanism assessment,Chemosphere

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Facilitating effects of the synergy with zero-valent iron and peroxysulfate on the sludge anaerobic fermentation system: Combined biological enzyme, microbial community and fermentation mechanism assessment
Chemosphere ( IF 8.1 ) Pub Date : 2024-03-27 , DOI: 10.1016/j.chemosphere.2024.141805
Baodan Jin ₁ , Yusheng Jia ₁ , Ken Cheng ₁ , Chenchen Chu ₁ , Jiacheng Wang ₁ , Ye Liu ₁ , Jingjing Du ₁ , Lan Wang ₁ , Long Pang ₁ , Jiantao Ji ₂ , Xia Cao ₁

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This study evaluated a synergetic waste activated sludge treatment strategy with environmentally friendly zero-valent iron nanoparticles (Fe) and peroxysulfate. To verify the feasibility of the synergistic treatment, Fe, peroxysulfate, and the mixture of peroxysulfate and Fe (synergy treatment) were added to different sludge fermentation systems. The study demonstrated that the synergy treatment fermentation system displayed remarkable hydrolysis performance with 435.50 mg COD/L of protein and 197.67 mg COD/L of polysaccharide, which increased 1.13–2.85 times (protein) and 1.12–1.49 times (polysaccharide) for other three fermentation system. Additionally, the synergy treatment fermentation system (754.52 mg COD/L) exhibited a well acidification performance which was 1.35–41.73 times for other systems (18.08–557.27 mg COD/L). The synergy treatment fermentation system had a facilitating effect on the activity of protease, dehydrogenase, and alkaline phosphatase, which guaranteed the transformation of organic matter. Results also indicated that , , , and were enriched in synergy treatment, which was beneficial to produce SCFAs. The activation of Fe on peroxysulfate promoting electron transfer, improving the active groups, and increasing the enrichment of functional microorganisms showed the advanced nature of synergy treatment. These results proved the feasibility of synergy treatment with Fe and peroxysulfate to enhance waste activated sludge anaerobic fermentation.

中文翻译：

零价铁与过硫酸盐协同作用对污泥厌氧发酵系统的促进作用：生物酶、微生物群落和发酵机制的结合评估

本研究评估了环保型零价铁纳米颗粒 (Fe) 和过氧硫酸盐的协同废物活性污泥处理策略。为了验证协同处理的可行性，在不同的污泥发酵系统中添加Fe、过氧硫酸盐以及过氧硫酸盐和Fe的混合物（协同处理）。研究表明，协同处理发酵系统表现出显着的水解性能，蛋白质水解率为435.50 mg COD/L，多糖水解为197.67 mg COD/L，比其他三种发酵体系分别提高了1.13-2.85倍（蛋白质）和1.12-1.49倍（多糖）。发酵系统。此外，协同处理发酵系统（754.52 mg COD/L）表现出良好的酸化性能，是其他系统（18.08-557.27 mg COD/L）的1.35-41.73倍。协同处理发酵系统对蛋白酶、脱氢酶、碱性磷酸酶的活性有促进作用，保证了有机物的转化。结果还表明，、、、和在协同处理中得到富集，有利于 SCFA 的生产。 Fe在过硫酸盐上的活化促进电子转移，提高活性基团，增加功能微生物的富集，显示了协同处理的先进性。这些结果证明了铁和过硫酸盐协同处理增强废弃活性污泥厌氧发酵的可行性。

更新日期：2024-03-27

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