Enhanced biological phosphorus and nitrogen removal by high-concentration powder carriers: extracellular polymeric substance, microbial communities, and metabolic pathways

Shi, Juan; Liang, Zixuan; Dai, Xiaohu

doi:10.1007/s11356-022-22363-8

Cited by 8 publications

(5 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PP and the MPP were both obtained under a continuous manufacturing process under similar conditions, including the same temperature and formulation components (Table 1 ). A smooth surface was observed on the PP, which enhanced the fluidity in the liquid–gas interface (Shi et al 2023 ) and reduced the bacterial adhesive ability. A rough surface with sufficient grooves and microscopic pores was observed for the MPP, which could be attributed to heterochromatic particles in their cross section.…”

Section: Resultsmentioning

confidence: 99%

Enhanced chlorobenzene removal by internal magnetic field through initial cell adhesion and biofilm formation

Chen,

Qiu,

Sun

et al. 2024

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

Magnetic fields (MF) have been proven efficient in bioaugmentation, and the internal MFs have become competitive because they require no configuration, despite their application in waste gas treatment remaining largely unexplored. In this study, we firstly developed an intensity-regulable bioaugmentation with internal MF for gaseous chlorobenzene (CB) treatment with modified packing in batch bioreactors, and the elimination capacity increased by up to 26%, surpassing that of the external MF. Additionally, the microbial affinity to CB and the packing surface was enhanced, which was correlated with the ninefold increased secreted ratio of proteins/polysaccharides, 43% promoted cell surface hydrophobicity, and half reduced zeta potential. Furthermore, the dehydrogenase content was promoted over 3 times, and CB removal steadily increased with the rising intensity indicating enhanced biofilm activity and reduced CB bioimpedance; this was further supported by kinetic analysis, which resulted in improved cell adhesive ability and biological utilisation of CB. The results introduced a novel concept of adjustable magnetic bioaugmentation and provided technical support for industrial waste gas treatments. Key points • Regulable magnetic bioaugmentation was developed to promote 26% chlorobenzene removal • Chlorobenzene mineralisation was enhanced under the magnetic field • Microbial adhesion was promoted through weakening repulsive forces Graphical abstract

show abstract

Section: Resultsmentioning

confidence: 99%

Enhanced chlorobenzene removal by internal magnetic field through initial cell adhesion and biofilm formation

Chen,

Qiu,

Sun

et al. 2024

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…3). Therefore, the rise of abundance of fermentative bacteria genus Shewanella or norank_f__NS9_marine_group should help lower NH 3 -N and NO 2 -N concentrations in the environment (Yoon et al 2015;Zhang et al 2022;Shi et al 2023) and thus create better conditions for the PL to grow. This is exactly the case here as NH 3 -N and NO 2 -N in group F was 1.21 ± 0.49 mg/L and 0.03 ± 0.01 mg/L, much lower than that in group L (Table 1).…”

Section: Discussionmentioning

confidence: 99%

The effects of Bdellovibrio and like organisms (BALOs) and Lactobacillus salivarius on changes in gut microbial biodiversity and their potential role on Shrimp (Litopenaeus vannamei) Postlarvae

Najnine,

Wang,

Han

et al. 2024

Preprint

View full text Add to dashboard Cite

White-leg shrimp (Litopenaeus vannamei) is the most important species in the shrimp industry, with its production virtually all from aquaculture. Nevertheless, it frequently suffers from diseases, indicating the inadequacy of existing control measures. Recent, evidence has shown that probiotics play an important role in disease control by maintaining the composition of the gut microbiota. The aim of the present work was to evaluate the probiotic potential of Bdellovibrio and like organisms (BALOs) strain BDN-1F2 and Lactobacillus salivarius strain GZPH2 in rearing shrimp postlarvae (PL) with a control group without any treatment. The results showed that compared to BDN-1F2, GZPH2 only had a better effect on length growth while BDN-1F2 performed significantly better in weight gain and survival rate (P < 0.05). The 16S high throughput sequencing results showed that BDN-1F2 was significantly more effective than GZPH2 at building a healthy gut microbial communities, including the reduction of pathogenic bacterial taxa Gammaproteobacteria/Vibrionales and the increment of beneficial bacterial taxa Alphaproteobacteria/Rhodobacteraceae. Furthermore, BDN-1F2 also lowered Firmicutes/Bacteroidetes ratios, which theoretically supported better PL growth performance in this group. In addition, the relative abundances of predicted functional microbial genes involving amino acid metabolism and carbohydrate were very high in BDN-1F2 group than in groups GZPH2 and control. To our knowledge, this is the first report to compare between two probiotics, BALOs strain BDN-1F2 and Lactobacillus salivarius strain GZPH2 and an investigation of changes in intestinal microbial community structure as well as their effects on shrimp survival and growth performance.

show abstract

“…Moreover, the carrier contains specialized organic alternative carbon sources, like polyhydroxyalkanoates (PHA), which can enhance the biological denitrification process and can substantially improve denitrification efficiency, thereby achieving biological purification of the wastewater [15]. By regulating carrier quantity, an optimal microbial living environment can be sustained, maximizing microbial system efficiency in WWT and ensuring effluent water quality adherence to established standards [2]. Hence, in the urban domestic WWT process, the recognition and quantification of carriers are of paramount importance.…”

Section: Related Work 21 Carrier For Wastewater Treatmentmentioning

confidence: 99%

“…A carrier is typically an attachable growth structure that can enrich microorganisms, such as cells and bacteria, at the surface to increase the amount of biomass in a bioreactor [1]. Adjusting and controlling the number of carriers can maintain an appropriate and effective microbial living environment [2]. The microbial system plays a vital role in wastewater treatment (WWT), as it degrades, transforms, and eliminates organic pollutants from wastewater.…”

Section: Introductionmentioning

confidence: 99%

“…The microbial system plays a vital role in wastewater treatment (WWT), as it degrades, transforms, and eliminates organic pollutants from wastewater. The accurate detection and quantification of carriers in wastewater maximizes the processing efficiency of the microbial system [3] in WWT and ensures that the effluent water quality complies with the set standards [2]. Carrier detection in microscopic images is a significant step in urban domestic WWT [4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CarrDet: Attention–Symmetry-Based Microscopic Carrier Detection for Wastewater Treatment

Chen,

Liu,

Liu

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The carrier is one of the key components used in wastewater treatment, which can enrich microorganisms at the surface to improve the amount of biomass in the reactor. Monitoring and adjusting the number of carriers is a key component for the processing efficiency of the ecosystem, which directly impacts wastewater treatment effectiveness. Therefore, carrier detection in wastewater microscopic images is important in the urban domestic wastewater treatment process. The current process to detect carriers is operator-dependent, which is time-consuming and expensive. Though a number of general object or cell detection approaches are used for this task, their effectiveness is limited because the carrier and background are similar and there are defective carriers as background noise. In this paper, we propose CarrDet, the first deep learning-based carrier detection framework for wastewater treatment. CarrDet uses a carrier feature block attention module and a symmetry-based defective carrier detection module to detect carriers with shallow edges and reduce false positives caused by defective carriers, respectively. To evaluate CarrDet, we propose a carrier dataset of 600 wastewater microscopic images, manually annotated by experts. Compared with state-of-the-art object detection methods, CarrDet shows superior performance in terms of both accuracy and speed, achieving a mAP of 94.32 and an IPS of 4.93. We employed CarrDet to confirm the detection results of 621 wastewater microscopic images, which were detected by inexperienced engineers who are new to the field. CarrDet added 398 unrecognized carriers with shallow edges and corrected 273 incorrect manual annotations in 5 min, which emphasizes the efficiency and practicality of CarrDet for practical business scenarios.

show abstract

Enhanced biological phosphorus and nitrogen removal by high-concentration powder carriers: extracellular polymeric substance, microbial communities, and metabolic pathways

Cited by 8 publications

References 56 publications

Enhanced chlorobenzene removal by internal magnetic field through initial cell adhesion and biofilm formation

Enhanced chlorobenzene removal by internal magnetic field through initial cell adhesion and biofilm formation

The effects of Bdellovibrio and like organisms (BALOs) and Lactobacillus salivarius on changes in gut microbial biodiversity and their potential role on Shrimp (Litopenaeus vannamei) Postlarvae

CarrDet: Attention–Symmetry-Based Microscopic Carrier Detection for Wastewater Treatment

Contact Info

Product

Resources

About