Identification of dissimilatory nitrate reduction to ammonium (DNRA) and denitrification in the dynamic cake layer of a full-scale anoixc dynamic membrane bioreactor for treating hotel laundry wastewater

Zhou, Lijie; Zhao, Bikai; Lin, Yuanzhong; Shao, Zhiyuan; Zeng, Rongjie; Shen, Yichang; Zhang, Wenyu; Jian, Yixin; Zhuang, Wei-Qin

doi:10.1016/j.chemosphere.2022.136078

Cited by 16 publications

(2 citation statements)

References 49 publications

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“…A significant positive correlation between the total variation of nitrogen-related genes and the physicochemical properties existed among samples ( Figure 4A ). The concentration of COD and OLR showed the main influence on genes in the DNRA and denitrification pathways ( Figure 4B ), while previous research pointed out that both DNRA bacteria and denitrifies could use the organic carbon substances from removed COD as electron donors ( Zhou et al, 2022 ).…”

Section: Discussionmentioning

confidence: 86%

Monthly dynamics of microbial communities and variation of nitrogen-cycling genes in an industrial-scale expanded granular sludge bed reactor

Zhang

Zhang²,

Deng³

et al. 2023

Front. Microbiol.

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IntroductionThe expanded granular sludge bed (EGSB) is a major form of anaerobic digestion system during wastewater treatment. Yet, the dynamics of microbial and viral communities and members functioning in nitrogen cycling along with monthly changing physicochemical properties have not been well elucidated.MethodsHere, by collecting the anaerobic activated sludge samples from a continuously operating industrial-scale EGSB reactor, we conducted 16S rRNA gene amplicon sequencing and metagenome sequencing to reveal the microbial community structure and variation with the ever-changing physicochemical properties along within a year.ResultsWe observed a clear monthly variation of microbial community structures, while COD, the ratio of volatile suspended solids (VSS) to total suspended solids (TSS) (VSS/TSS ratio), and temperature were predominant factors in shaping community dissimilarities examined by generalized boosted regression modeling (GBM) analysis. Meanwhile, a significant correlation was found between the changing physicochemical properties and microbial communities (p <0.05). The alpha diversity (Chao1 and Shannon) was significantly higher (p <0.05) in both winter (December, January, and February) and autumn (September, October, and November) with higher organic loading rate (OLR), higher VSS/TSS ratio, and lower temperature, resulting higher biogas production and nutrition removal efficiency. Further, 18 key genes covering nitrate reduction, denitrification, nitrification, and nitrogen fixation pathways were discovered, the total abundance of which was significantly associated with the changing environmental factors (p <0.05). Among these pathways, the dissimilatory nitrate reduction to ammonia (DNRA) and denitrification had the higher abundance contributed by the top highly abundant genes narGH, nrfABCDH, and hcp. The COD, OLR, and temperature were primary factors in affecting DNRA and denitrification by GBM evaluation. Moreover, by metagenome binning, we found the DNRA populations mainly belonged to Proteobacteria, Planctomycetota, and Nitrospirae, while the denitrifying bacteria with complete denitrification performance were all Proteobacteria. Besides, we detected 3,360 non-redundant viral sequences with great novelty, in which Siphoviridae, Podoviridae, and Myoviridae were dominant viral families. Interestingly, viral communities likewise depicted clear monthly variation and had significant associations with the recovered populations (p <0.05).DiscussionOur work highlights the monthly variation of microbial and viral communities during the continuous operation of EGSB affected by the predominant changing COD, OLR, and temperature, while DNRA and denitrification pathways dominated in this anaerobic system. The results also provide a theoretical basis for the optimization of the engineered system.

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Section: Discussionmentioning

confidence: 86%

Monthly dynamics of microbial communities and variation of nitrogen-cycling genes in an industrial-scale expanded granular sludge bed reactor

Zhang

Zhang²,

Deng³

et al. 2023

Front. Microbiol.

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“…Cake merupakan salah satu hidangan penutup yang cukup diminati oleh tamu. Cake adalah produk makanan manis yang terbuat dari bahan utama tepung terigu, gula, telur dan margarin (Zhou, Zhao, et al, 2022). Cake yang disajikan di Hotel Pangeran Beach Padang terdiri 2 macam, yaitu cake dan traditional cake.…”

Section: Pendahuluanunclassified

Produk Pastry di Hotel Pangeran Beach Padang

Salsabila W.,

Asnur

2023

j. p pengembangan sains h.

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Adanya masalah terkait cake yang disajikan dari segi penampilan, bentuk dan temperatur. Penelitian ini bertujuan untuk menganalisis produk pastry di Hotel Pangeran Beach Padang. Penelitian ini menggunakan penelitian deskriptif dengan data kuantitatif dan metode survey. Penelitian ini menggunakan teknik purposive sampling dengan jumlah sampel 99 orang tamu yang menginap di Hotel. Data penelitian diperoleh dari hasil kuesioner yang disebar ke responden dan diolah menggunakan analisis deskriptif dan perhitungan Tingkat Capaian Responden (TCR) dengan bantuan program SPSS versi 20.00. Berdasarkan hasil pengolahan data, dapat diketahui bahwa Produk Pastry (Cake) menunjukkan kategori setuju pada rentang skor 36.65 kurang 43.95 dengan persentase 82% serta Tingkat Capaian Responden sebesar 70.89% pada kategori cukup baik, Produk Pastry (Roti) berada pada rentang skor 36.65 kurang dari 43.95 dan persentase 82% dengan kategori setuju serta Tingkat Capaian Responden sebesar 70.95% pada kategori cukup baik, dan Produk Pastry (Pudding) menunjukkan persentase 82% pada rentang skor 36.65 kurang dari 43.95 dengan kategori setuju serta Tingkat Capaian Responden sebesar 71.22% pada kategori cukup baik.

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Efficient Removal Performance of COD in Real Laundry Wastewater via Conventional and Photo-Fenton Degradation Systems: A Comparative Study on Oxidants and Operating Time by H2O2/Fe2+

Cüce

Temel

2023

Arab J Sci Eng

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Identification of dissimilatory nitrate reduction to ammonium (DNRA) and denitrification in the dynamic cake layer of a full-scale anoixc dynamic membrane bioreactor for treating hotel laundry wastewater

Cited by 16 publications

References 49 publications

Monthly dynamics of microbial communities and variation of nitrogen-cycling genes in an industrial-scale expanded granular sludge bed reactor

Monthly dynamics of microbial communities and variation of nitrogen-cycling genes in an industrial-scale expanded granular sludge bed reactor

Produk Pastry di Hotel Pangeran Beach Padang

Efficient Removal Performance of COD in Real Laundry Wastewater via Conventional and Photo-Fenton Degradation Systems: A Comparative Study on Oxidants and Operating Time by H2O2/Fe2+

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