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Effects of Fe3O4 nanoparticles on anaerobic digestion enzymes and microbial community of sludge
Environmental Technology ( IF 2.8 ) Pub Date : 2021-08-09 , DOI: 10.1080/09593330.2021.1963324
Jun Zhou 1 , Haonan Zhang 1 , Jianbo Liu 1 , Lei Gong 1 , Xiaoqi Yang 1 , Tong Zuo 1 , Ying Zhou 1 , Jin Wang 1 , Xiaogang You 1 , Qinwei Jia 1 , Luyu Wang 1
Affiliation  

ABSTRACT

Fe3O4 nanoparticles (NPs) have potential effects on the anaerobic digestion of excess sludge. The effects of different concentrations of Fe3O4 NPs (0, 100, 200, 400 and 600 mg/L) on enzymes and microorganisms in anaerobic digestion were studied to explore the mechanism of the effect of Fe3O4 NPs on anaerobic digestion. The results showed that 100, 200 and 400 mg/L Fe3O4 NPs could promote anaerobic digestion, and 200 mg/L Fe3O4 NPs had the most obvious promoting effect. The activities of protease, cellulase, dehydrogenase, acetic kinase and coenzyme F420 in the 200 mg/L Fe3O4 NPs group reached 120 U/mg VS, 71.75 U/g VS, 135 U/mL, 94 mol/L, 1.37 umol/g VSS, respectively, which were 3.8, 1.5, 1.2, 1.2 and 1.6 times of the blank group, respectively. However, when the concentration of Fe3O4 NPs reached 600 mg/L, the activities of cellulase, dehydrogenase and acetic kinase were lower than those of the blank group, and anaerobic digestion was inhibited. The above conclusions can also be confirmed by high-throughput sequencing. The abundance of longilinea and ornatilina in the 200 mg/L Fe3O4 NPs group was 8.8% and 4.1% respectively, and methanthrix abundance was 69%, which was more conducive to decomposition acetic acid into CH4.

Highlights

  1. To explore the effects of Fe3O4 NPS on enzyme activity and microorganisms.

  2. 200mg/L Fe3O4 NPs could significantly promote the activity of enzyme.

  3. 200mg/L Fe3O4 NPs could promote the diversity of bacterial and archaeal communities.

  4. 600mg/L Fe3O4 NPs could inhibit some enzyme activities and microbial community diversity.



中文翻译:

纳米Fe3O4对污泥厌氧消化酶和微生物群落的影响

摘要

Fe 3 O 4纳米颗粒(NPs) 对剩余污泥的厌氧消化具有潜在影响。研究不同浓度Fe 3 O 4 NPs(0、100、200、400和600 mg/L)对厌氧消化中酶和微生物的影响,探讨Fe 3 O 4 NPs影响厌氧消化的机理. 结果表明,100、200和400 mg/L Fe 3 O 4 NPs均能促进厌氧消化,其中200 mg/L Fe 3 O 4 NPs促进效果最明显。200 mg/L Fe 中蛋白酶、纤维素酶、脱氢酶、乙酸激酶和辅酶 F420 的活性3 O 4 NPs组分别达到120 U/mg VS、71.75 U/g VS、135 U/mL、94 mol/L、1.37 umol/g VSS,分别是对照组的3.8、1.5、1.2、1.2和1.6倍分别为空白组。但当Fe 3 O 4 NPs浓度达到600 mg/L时,纤维素酶、脱氢酶和乙酸激酶活性低于空白组,厌氧消化受到抑制。上述结论也可以通过高通量测序得到证实。200 mg/L Fe 3 O 4 NPs组中longilineaornatilina的丰度分别为8.8%和4.1%,methanthrix丰度为69%,更有利于乙酸分解为CH 4

强调

  1. 探讨Fe3O4 NPS对酶活性和微生物的影响。

  2. 200mg/L Fe 3 O 4 NPs可显着促进酶的活性。

  3. 200mg/L Fe 3 O 4 NPs 可以促进细菌和古细菌群落的多样性。

  4. 600mg/L Fe 3 O 4 NPs可抑制某些酶活性和微生物群落多样性。

更新日期:2021-08-09
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