One-step treatment and resource recovery of high-concentration non-toxic organic wastewater by photosynthetic bacteria

Fan, Meng; Yang, Anqi; Wang, Hangyao; Zhang, Guangming; Li, Xuemei; Zhang, Yi; Zou, Zhiguo

doi:10.1016/j.biortech.2017.12.002

Cited by 48 publications

(11 citation statements)

References 41 publications

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“…5). Certain PSB cell accumulation under extreme C/N ratios was also reported by previous studies [24,25]. Differing from activated sludge technology, cell proliferation is greatly advantageous because PSB cells are valuable products in PSB bioconversion technology.…”

Section: Psb Cell Proliferationsupporting

confidence: 69%

“…This showed that for COD removal, PSB bioconversion is very flexible and the C/N ratio is not restrictive. Other studies [24,25] have reported that PSB could remove more than 60% of COD wastewater loads under extreme C/N ratios. Zhi et al [26] showed less than 50% COD removal with a C/N ratio of 2 in a constructed wetland.…”

Section: Cod Removal Under Different Initial C/n Ratiosmentioning

confidence: 95%

“…The specific components and characteristics of each reactor are shown in the Supplementary Materials tables S1 and S2. The C/N ratio range of 400-0.1 was determined via data from the literature and data of actual wastewater [19,20]. The initial pH was 6.8-7.2.…”

Section: Wastewatermentioning

confidence: 99%

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Effects of C/N ratio on pollution removal efficiency and cell proliferation during the bioconversion of wastewater by photosynthetic bacteria

Fan¹,

Yang²,

Zhang³

et al. 2019

Desalination and Water Treatment

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Photosynthetic bacteria (PSB) bioconversion is a new technology for wastewater treatment and resource recovery. The C/N ratio is an important factor in biological wastewater treatment. For the first time, the efficient C/N ratio range for PSB bioconversion, and the effects of the C/N ratio on wastewater treatment efficiency and cell proliferation, were studied. The results of this study showed that PSB bioconversion was efficient when the wastewater C/N ratio was within the range of 400-0.1. Chemical oxygen demand (COD) removal was higher than 60% in this C/N range. The change in the NH 4 +-N concentration was fitted by the logistic model for each C/N ratio. The V max of nitrogen removal was similar to that of other technologies and it decreased as the C/N ratio decreased. This shows that this technology exhibits reliable pollutant removal in the C/N ratio range of 400-0.1. The nitrogen transformation study indicated that the PSB might use a specific mechanism under a low C/N ratio. PSB cell proliferation was fitted by the logistic model in the C/N ratio range of 400-2, and μ max was found to be not correlated with the C/N ratio. The protein content in the cells was 40-60% in the C/N ratio range of 400-0.1. The results showed that PSB bioconversion technology has a very high resource value and the value of the C/N ratio places little restriction on it.

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Section: Psb Cell Proliferationsupporting

confidence: 69%

Section: Cod Removal Under Different Initial C/n Ratiosmentioning

confidence: 95%

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Effects of C/N ratio on pollution removal efficiency and cell proliferation during the bioconversion of wastewater by photosynthetic bacteria

Fan¹,

Yang²,

Zhang³

et al. 2019

Desalination and Water Treatment

Self Cite

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“…Microorganisms play crucial roles in biological wastewater treatment process which can effectively remove organic matters and simultaneously achieve energy recovery [1–3]. Hydrogen-producing species in activated sludge and biofilms are responsible for providing electron to methanogenesis, homoacetogenesis, and other terminal electron-accepting processes such as sulfate reduction and denitrification [4].…”

Section: Introductionmentioning

confidence: 99%

Quantitative proteomic analysis reveals the ethanologenic metabolism regulation of Ethanoligenens harbinense by exogenous ethanol addition

Mei

Liu

et al. 2019

Biotechnol Biofuels

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Background H 2 –ethanol-coproducing bacteria, as primary fermenters, play important roles in the microbiome of bioreactors for bioenergy production from organic wastewater or solid wastes. Ethanoligenens harbinense YUAN-3 is an anaerobic ethanol–H 2 -fermenting bacterium. Ethanol is one of the main end-products of strain YUAN-3 that influence its fermentative process. Until recently, the molecular mechanism of metabolic regulation in strain YUAN-3 during ethanol accumulation has still been unclear. This study aims to elucidate the metabolic regulation mechanisms in strain YUAN-3, which contributes to effectively shape the microbiome for biofuel and bioenergy production from waste stream. Results This study reports that ethanol stress altered the distribution of end-product yields in the H 2 –ethanol-coproducing Ethanoligenens harbinense strain YUAN-3. Decreasing trends of hydrogen yield from 1888.6 ± 45.8 to 837 ± 64.7 mL L −1 and acetic acid yield from 1767.7 ± 45 to 160.6 ± 44.7 mg L −1 were observed in strain YUAN-3 with increasing exogenous ethanol (0 mM–200 mM). However, the ethanol yield of strain YUAN-3 increased by 15.1%, 30.1%, and 27.4% in 50 mM, 100 mM, and 200 mM ethanol stress, respectively. The endogenous ethanol accounted for 96.1% (w/w) in liquid end-products when exogenous ethanol of 200 mM was added. The molar ratio of ethanol to acetic acid increased 14 times (exogenous ethanol of 200 mM) compared to the control. iTRAQ-based quantitative proteomic analysis indicated that 263 proteins of strain YUAN-3 were differentially expressed in 50 mM, 100 mM, and 200 mM of exogenous ethanol. These proteins are mainly involved in amino acid transport and metabolism, central carbon metabolism, and oxidative stress response. Conclusion These differentially expressed proteins play important roles in metabolic changes necessary for growth and survival of strain YUAN-3 during ethanol stress. The up-regulation of bifunctional acetaldehyde-CoA/alcohol dehydrogenase (ADHE) was the main reason why ethanol production was enhanced, while hydrogen gas and acetic acid yields declined in strain YUAN-3 during ethanol stress. This study also provides a new approach for the enhancement of ethanologenesis by H 2 –ethanol-coproducing bacteria through exogenous ethanol addition. Electronic supplementary material The online version of this article (10.1186/s13068-019-1511-y) contains supplementary material, which is available to authorized users.

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“…Therefore, removing the undesirable ammonium in landscape water is essential and urgent. Rhodopseudomonas has been used as the most effective bioagent in the field of environmental protection, such as in the treatment of sewage, household, and restaurant wastewater owing to its ability to efficiently remove ammonium [11][12][13][14]. However, little research has been conducted on the application of the genus Rhodopseudomonas, even the PSB in the treatment of landscape water ammonium pollution.…”

Section: Introductionmentioning

confidence: 99%

Efficient Ammonium Removal by Bacteria Rhodopseudomonas Isolated from Natural Landscape Water: China Case Study

Huang

Yang

et al. 2018

Water

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In this study, we isolated a strain of photosynthetic bacteria from landscape water located in Southwest University, Chongqing, China, and named it Smobiisys501. Smobiisys501 was Rhodopseudomonas sp. according to its cell morphological properties and absorption spectrum analysis of living cells. The analysis of the 16S rDNA amplification sequence with specific primers of photosynthetic bacteria showed that the homology between Smobiisys501 and Rhodopseudomonas sp. was 100%, and the alignment results of protein sequences of the bacterial chlorophyll Y subunit showed that Smobiisys501 and Rhodopseudomonas palustris were the most similar, with a similarity of more than 92%. However, Smobiisys501 could not utilize glucose and mannitol as a carbon source and had a low fatty acid content, which were different from the related strains of the genus Rhodopseudomonas. Moreover, the DNA-DNA relatedness was only 42.2 ± 3.3% between Smobiisys501 and the closest strain Rhodopseudomonas palustris. Smobiisys501 grew optimally at 30 °C and pH 7.0 in the presence of yeast extract, and it could efficiently remove ammonium (99.67% removal efficiency) from synthetic ammonium wastewater. All the results indicated that Smobiisys501 was a novel species of Rhodopseudomonas, with the ability to remove ammonium.

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One-step treatment and resource recovery of high-concentration non-toxic organic wastewater by photosynthetic bacteria

Cited by 48 publications

References 41 publications

Effects of C/N ratio on pollution removal efficiency and cell proliferation during the bioconversion of wastewater by photosynthetic bacteria

Effects of C/N ratio on pollution removal efficiency and cell proliferation during the bioconversion of wastewater by photosynthetic bacteria

Quantitative proteomic analysis reveals the ethanologenic metabolism regulation of Ethanoligenens harbinense by exogenous ethanol addition

Efficient Ammonium Removal by Bacteria Rhodopseudomonas Isolated from Natural Landscape Water: China Case Study

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