Nitrogen removal performance in pilot-scale solid-phase denitrification systems using novel biodegradable blends for treatment of waste water treatment plants effluent

Yang, Zhongchen; Sun, Haimeng; Zhou, Qi; Zhao, Lei; Wu, Wei‐Zhong

doi:10.1016/j.biortech.2020.122994

Cited by 63 publications

(14 citation statements)

References 43 publications

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“…Among all the nitrogen removal methods and technologies, biological denitrification is generally applied due to its high efficiency and low cost. Heterotrophic denitrification, which utilizes organic carbon sources as electron donors, has higher denitrification rates compared with autotrophic denitrification [4]. However, the deficiency of available carbon sources is an intractable problem for heterotrophic denitrification in the treatment of wastewater with low carbon to nitrogen (C/N) ratio such as wastewater treatment plants (WWTP) effluent, rural sewage, farmland recession, landfill leachate, and industrial effluents [5][6][7][8], etc.…”

Section: Introductionmentioning

confidence: 99%

Release Mechanism, Secondary Pollutants and Denitrification Performance Comparison of Six Kinds of Agricultural Wastes as Solid Carbon Sources for Nitrate Removal

Ling

Yan

Wang

et al. 2021

IJERPH

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Agricultural wastes used as denitrification carbon sources have some drawbacks such as excessive organic carbon release and unclear release characteristics of nitrogen, phosphorus, and chromatic substances, which can cause adverse effects on the effluent quality during the denitrification process. The composition and surface characteristics, carbon release mechanisms, and secondary pollutant release properties of six kinds of agricultural wastes, i.e., rice straw (RS), wheat straw (WS), corn stalk (CS), corncob (CC), soybean stalk (SS), and soybean hull (SH) were studied and analyzed in this research. The denitrification performance of these agricultural wastes was also investigated extensively by batch experiments. The results showed that the carbon release basically followed the second-order reaction kinetic equation and Ritger–Peppas equation in the 120 h reaction, and it was mainly controlled by the diffusion process. The kinetic equation fitting results and bioavailability test suggested that the potential risk of excessive effluent COD of CC was the lowest due to the appropriate amount and degradability of its released carbon. The NH4+-N, TN, and TP in the leachate of RS were higher than those of the other five agriculture wastes, and the chroma in the leachate of WS and CS was heavier than that of the others. CC released the lowest pollutants, which resulted in slight fluctuations of effluent quality in the start-up period (1–11 d), and it had the best nitrogen removal capacity in the denitrification experiment. The average NO3−-N removal of CC was 5.12 mg for each batch in the stable period (11–27 d), which was higher than that of others, and less NO2−-N, NH4+-N, and COD were accumulated in the CC effluent during the whole denitrification process.

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Section: Introductionmentioning

confidence: 99%

Release Mechanism, Secondary Pollutants and Denitrification Performance Comparison of Six Kinds of Agricultural Wastes as Solid Carbon Sources for Nitrate Removal

Ling

Yan

Wang

et al. 2021

IJERPH

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“…In addition, it was observed that heterotrophic bacteria on the surface of PHBV can also eliminate part of oxygen, which meant that the introduction of PHBV can also consume part of oxygen, so as to contribute to the autotrophic denitrification under natural conditions. Similarly, Yang et al also reported that the PHBV/sawdust system can break the limitation of oxygen to realize denitrification with 6–7 mg/L of DO concentrations. In fact, there existed an aerobic layer and anoxic layer on the surface of the solid carbon source, and the aerobic layer is also mainly responsible for eliminating oxygen .…”

Section: Results and Discussionmentioning

confidence: 89%

“…According to previous studies in our laboratory, the synthetic biodegradable polymers exhibited better and stable denitrification performance compared with the natural materials. , Therein, as a typical solid carbon source of synthetic biodegradable polymers, poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) has the advantage of high-rate denitrification. In addition, compared with liquid carbon and natural plant materials, PHBV has no risks of excessive DOC and color release. , Thus, PHBV is wildly used in processes requiring high-speed denitrification with high NO 3 – –N concentrations, which is attributed to the quick removal of NO 3 – –N in practical engineering, although the cost of PHBV is relatively high . For instance, Yang et al developed PHBV for NO 3 – –N removal with its removal efficiency 95.21%.…”

Section: Introductionmentioning

confidence: 98%

Difference and Network Analysis of Functional Genes Revealed the Hot Area of Carbon Degradation, Nitrogen, Phosphorus, and Sulfur Cycling in Blending Systems with Pyrite and Poly(3-hydroxybutyrate-hydroxyvalerate) for Nitrogen and Phosphorus Removal

et al. 2022

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A higher denitrification rate was realized via controlling the mass ratio of pyrite and poly(3-hydroxybutyrate-hydroxyvalerate) (PHBV) under natural aerobic conditions. The results showed that the suitable mass ratio of PHBV and pyrite could be 1:2 with its removal efficiency of nitrogen and phosphorus of 99.7 and 53.4%, respectively. The PHBV/pyrite system has formed the spatial patterns of the biofilm community, such as Dechloromons attached to the pyrite surface, Rhodocyclaceae attached to the PHBV surface, and Acidovorax attached to the suppled sludge, which highlighted that the autotrophic− heterotrophic synergy was achieved. The difference analysis among functional genes detected by high-throughput quantitative polymerase chain reaction indicated that the surface of pyrite in the pyrite/PHBV system is the hot area of methane production, the denitrifying process, and phosphorus removal. Network analysis indicated that there was a closer connection among functional genes on the pyrite surface, also supporting the speculation that pyrite was the hot area for the interaction of various genes in the pyrite/PHBV system. The key gene co-occurrence revealed that lig, nirS, and aspA are the keystone genes for cellulose degradation, denitrification, and S cycling, respectively. These results suggested that the pyrite surface was the hot area for denitrification, phosphorus removal in the blending system with pyrite and PHBV for nitrogen and phosphorus removal.

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“…The Simpson index was calculated to be 0.12 at 200 mA/m 2 -WP, lower than the results calculated for the experimental conditions. The microbial community diversity of mixed systems is complex (Yang et al 2020), explaining that systems have strong adaptability and high stability, which is conducive to denitrification.…”

Section: Analysis Of Microbial Community Diversitymentioning

confidence: 99%

Analysis of denitrification performance and microbial community structure in a bio-electrochemical reactor under different current densities with wheat-rice stone powder

Liu

2022

Journal of Water Reuse and Desalination

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Nitrate widely exists in water pollution and is the most stable form of nitrogen pollution. This study investigated the effect of the current density (CD) and the wheat-rice stone powder (WP) on denitrification performance, microbial diversity and enzyme activity in a bio-electrochemical reactor (BER). It was found that an optimum CD of 200 mA/m2 and the addition of WP significantly improved the nitrate removal rate constant compared with the control group (12.28 d−1 versus 9.75 d−1) and remarkably reduced the intermediate accumulation of nitrite. The application of both optimum CD and WP enhanced the microbial diversity and catalytic activity of nitrate reductase (Nar) and nitrite reductase (Nir). The most dominant microbial taxa in our reactor were Methyloversatilis, Methylotenera, and an unclassified genus of the family Methylophilaceae. Moreover, WP allowed the denitrifiers to better withstand the stress of high CD. This study presented results supporting the use of an optimum CD and natural mineral addition to improving the performance of the denitrification process within a BER.

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Nitrogen removal performance in pilot-scale solid-phase denitrification systems using novel biodegradable blends for treatment of waste water treatment plants effluent

Cited by 63 publications

References 43 publications

Release Mechanism, Secondary Pollutants and Denitrification Performance Comparison of Six Kinds of Agricultural Wastes as Solid Carbon Sources for Nitrate Removal

Release Mechanism, Secondary Pollutants and Denitrification Performance Comparison of Six Kinds of Agricultural Wastes as Solid Carbon Sources for Nitrate Removal

Difference and Network Analysis of Functional Genes Revealed the Hot Area of Carbon Degradation, Nitrogen, Phosphorus, and Sulfur Cycling in Blending Systems with Pyrite and Poly(3-hydroxybutyrate-hydroxyvalerate) for Nitrogen and Phosphorus Removal

Analysis of denitrification performance and microbial community structure in a bio-electrochemical reactor under different current densities with wheat-rice stone powder

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