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1. Role of porous polymer carriers and iron-carbon bioreactor combined micro-electrolysis and biological denitrification in efficient removal of nitrate from wastewater under low carbon to nitrogen ratio

Author:
Liu, Jian; Su, Junfeng; Ali, Amjad; Wang, Zhao; Chen, Changlun; Xu, Liang
Source:
Bioresource technology 2021 v.321 pp. 124447
ISSN:
0960-8524
Subject:
carbon nitrogen ratio,   etc   ; Zoogloea; bioreactors; denitrification; nitrates; polymers; wastewater;     Show all 7 Subjects
Abstract:
... In the current research, a novel bioreactor composed of porous polymer carriers and iron-carbon (PPC@FeC) was established through bacterial immobilized technology. The influence of key factors was studied on the nitrate removal performance of the PPC@FeC bioreactor. The experimental results showed that the highest removal rate of nitrate (7.33 mg L⁻¹ h⁻¹) can be obtained with short hydraulic reten ...
DOI:
10.1016/j.biortech.2020.124447

2. Resource recovery in aerobic granular sludge systems: is it feasible or still a long way to go?

Author:
Amorim de Carvalho, Clara de; Ferreira dos Santos, Amanda; Tavares Ferreira, Tasso Jorge; Sousa Aguiar Lira, Vitor Nairo; Mendes Barros, Antônio Ricardo; Bezerra dos Santos, André
Source:
Chemosphere 2021 v.274 pp. 129881
ISSN:
0045-6535
Subject:
carbon nitrogen ratio,   etc   ; activated sludge; biological treatment; bioreactors; evolution; exopolysaccharides; phosphorus; polyhydroxyalkanoates; salinity; tryptophan; wastewater treatment;     Show all 11 Subjects
Abstract:
... Lately, wastewater treatment plants are much often being designed as wastewater-resource factories inserted in circular cities. Among biological treatment technologies, aerobic granular sludge (AGS), considered an evolution of activated sludge (AS), has received great attention regarding its resource recovery potential. This review presents the state-of-the-art concerning the influence of operatio ...
DOI:
10.1016/j.chemosphere.2021.129881

3. Spatial distribution of carbon, nitrogen and sulfur in surface soil across the Pearl River Delta area, South China

Author:
Zhang, Huihua; Kariman, Khalil; Zhu, Li; Liu, Yong; Chen, Junjian; Zhu, Li'an; Li, Dingqiang
Source:
Geoderma regional 2021 v.25 pp. e00390
ISSN:
2352-0094
Subject:
carbon nitrogen ratio,   etc   ; agricultural land; nitrogen; nitrogen content; organic carbon; river deltas; rivers; soil; sulfur; China;     Show all 10 Subjects
Abstract:
... In the present study, 885 surface soil samples were collected to study the spatial variations and correlations between total contents of organic carbon (C), nitrogen (N) and sulfur (S) in surface soil across the Pearl River Delta (PRD) area. The results showed that soil C and N had similar spatial patterns, and the soil C:N ratio had a relative stable value of 9.63, suggesting that soil biological ...
DOI:
10.1016/j.geodrs.2021.e00390

4. Effects of carbohydrate addition frequencies on biofloc culture of Pacific white shrimp (Litopenaeus vannamei)

Author:
Tinh, Tran Huu; Hai, Tran Ngoc; Verreth, Johan A.J.; Verdegem, Marc C.J.
Source:
Aquaculture 2021 v.534 pp. 736271
ISSN:
0044-8486
Subject:
carbon nitrogen ratio,   etc   ; Litopenaeus vannamei; biofloc technology; carbohydrates; carbon; nitrogen; shrimp; shrimp culture; tapioca; water quality;     Show all 10 Subjects
Abstract:
... In Pacific white shrimp culture, adding organic carbohydrate to the pond besides feed improves water quality and shrimp performance. While the feeding frequency has significant effects on shrimp production, how often carbohydrate should be added remains unknown. This research investigated the effects of carbohydrate addition frequency of 1, 3, and 6 times per day on Pacific white shrimp production ...
DOI:
10.1016/j.aquaculture.2020.736271

5. Density functional theory study on a nitrogen-rich carbon nitride material C3N5 as photocatalyst for CO2 reduction to C1 and C2 products

Author:
Wang, Yuelin; Ngoc Pham, Thanh; Tian, Yu; Morikawa, Yoshitada; Yan, Likai
Source:
Journal of colloid and interface science 2021 v.585 pp. 740-749
ISSN:
0021-9797
Subject:
carbon nitrogen ratio,   etc   ; carbon dioxide; carbon nitride; density functional theory; light; photocatalysis; photocatalysts; solar energy;     Show all 8 Subjects
Abstract:
... A new-type nitrogen-rich carbon nitride material C₃N₅ has been synthesized recently, in which the C:N ratio increases from 3:4 in g-C₃N₄ to 3:5 due to the introduction of azo linkage (NN) connecting segments in two C₆N₇ units. Herein, C₃N₅ as a photocatalyst for CO₂ reduction was investigated by density functional theory methods. The electronic and optical properties indicate that C₃N₅ has a longe ...
DOI:
10.1016/j.jcis.2020.10.054

6. Responses of Soil Organic Carbon Mineralization and Microbial Communities to Leaf Litter Addition under Different Soil Layers

Author:
Zhang, Min; Dong, Li-Guo; Fei, Shi-Xuan; Zhang, Jia-Wen; Jiang, Xu-Meng; Wang, Ying; Yu, Xuan
Source:
Forests 2021 v.12 no.2
ISSN:
1999-4907
Subject:
carbon nitrogen ratio,   etc   ; Pinus tabuliformis; mineralization; plant litter; soil organic carbon; topsoil;     Show all 6 Subjects
Abstract:
... The mechanism of how soil carbon pools change when coniferous forests are converted into conifer-broadleaf mixed forests is poorly understood. In this study, the impact of additional carbon inputs on soil organic carbon mineralization and microbial communities was evaluated. In a microcosm incubation experiment, three types of ¹³C-labeled litter (Pinustabulaeformis (PT), Robiniapseudoacacia (RP), ...
DOI:
10.3390/f12020170

7. Influence of moisture content on chicken manure stabilization during microbial agent-enhanced composting

Author:
Li, Ming-Xing; He, Xiao-Song; Tang, Jian; Li, Xing; Zhao, Rui; Tao, Yi-Qian; Wang, Can; Qiu, Zhong-Ping
Source:
Chemosphere 2021 v.264 pp. 128549
ISSN:
0045-6535
Subject:
carbon nitrogen ratio,   etc   ; composts; nitrification; poultry manure; product safety; seed germination; temperature; total nitrogen; water content;     Show all 9 Subjects
Abstract:
... Moisture content (MC) influences substance transformation during composting and the function of exogenous microbial agents. Unsuitable MC could cause leaching, nutrient loss, and secondary contamination. In this study, chicken manure composting with varied MC (45–61%) was conducted under functional microbial agent inoculation to explore the optimum condition for composting and the potential mechan ...
DOI:
10.1016/j.chemosphere.2020.128549

8. Strategies to improve solid state anaerobic bioconversion of lignocellulosic biomass: an overview

Author:
Paritosh, Kunwar; Yadav, Monika; Kesharwani, Nupur; Pareek, Nidhi; Parthiba Karthyikeyan, Obulisamy; Balan, Venkatesh; Vivekanand, Vivekanand
Source:
Bioresource technology 2021 v.331 pp. 125036
ISSN:
0960-8524
Subject:
carbon nitrogen ratio,   etc   ; anaerobic digestion; biomass; biotransformation; cellulose; energy; leachates; lignin; lignocellulose; liquids; methane; nutrient balance; systems engineering;     Show all 13 Subjects
Abstract:
... Solid state anaerobic digestion (SSAD) of lignocellulosic biomass may be attractive solution for its valorisation. Compared to liquid state anaerobic digestion (LSAD), SSAD can handle higher organic loading rates (OLR), requires a less water and smaller reactor volume. It may require lower energy demand for heating or mixing and has higher volumetric methane productivity. Besides numerous benefits ...
DOI:
10.1016/j.biortech.2021.125036

9. Marine Group-II archaea dominate particle-attached as well as free-living archaeal assemblages in the surface waters of Kongsfjorden, Svalbard, Arctic Ocean

Author:
Jain, Anand; Krishnan, Kottekkatu Padinchati
Source:
Antonie van Leeuwenhoek 2021 v.114 no.5 pp. 633-647
ISSN:
0003-6072
Subject:
carbon nitrogen ratio,   etc   ; ; Archaea; carbon; community structure; elemental composition; genes; lifestyle; organic nitrogen; surface water; Arctic Ocean; Arctic region; Norway;     Show all 13 Subjects
Abstract:
... Marine archaea are a significant component of the global oceanic ecosystems, including the polar oceans. However, only a few attempts have been made to study archaea in the high Arctic fjords. Given the importance of Archaea in carbon and nitrogen cycling, it is imperative to explore their diversity and community composition in the high Arctic fjords, such as Kongsfjorden (Svalbard). In the presen ...
DOI:
10.1007/s10482-021-01547-1

10. Rapid evaluation of optimal growth substrates and improvement of industrial production of Bifidobacterium adolescentis based on the automatic feedback feeding method

Author:
Cui, Shumao; Zhu, Danfeng; Mao, Bingyong; Ma, Fangli; Zhao, Jianxin; Zhang, Hao; Chen, Wei
Source:
Lebensmittel-Wissenschaft + [i.e. und] Technologie 2021 v.143 pp. 110960
ISSN:
0023-6438
Subject:
carbon nitrogen ratio,   etc   ; Bifidobacterium adolescentis; biomass; carbon; fish; glucose; liquids; nitrogen; osmotic pressure; pH; peptones; plate count; yeast extract;     Show all 13 Subjects
Abstract:
... This study aimed to improve the industrial production of Bifidobacterium adolescentis strain Z25 by establishing a method that could rapidly evaluate proliferation efficiency in response to different carbon, and nitrogen sources, inorganic salts, trace elements. Notably, glucose, yeast extract, fish peptone, Mg were the optimum substrates for high-efficient proliferation of the strain. The inorgan ...
DOI:
10.1016/j.lwt.2021.110960

11. Adaptation, restoration and collapse of anammox process to La(III) stress: Performance, microbial community, metabolic function and network analysis

Author:
Su, Hao; Zhang, Dachao; Antwi, Philip; Xiao, Longwen; Zhang, Zhidan; Deng, Xiaoyu; Lai, Cheng; Zhao, Jiejun; Deng, Yukun; Liu, Zuwen; Shi, Miao
Source:
Bioresource technology 2021 v.325 pp. 124731
ISSN:
0960-8524
Subject:
carbon nitrogen ratio,   etc   ; ammonia; anaerobic ammonium oxidation; biochemical pathways; community structure; lanthanum; microbial communities; nitrogen; technology; wastewater;     Show all 10 Subjects
Abstract:
... During the mining of rare earth mineral, the use of lanthanum-containing fertilizers, and the disposal of lanthanum-containing electronic products, the content of lanthanum (La(III)) in typical ammonia wastewater with low carbon to nitrogen ratio is increasing day by day. Here, effects of La(III) on anammox process in performance, microbial community structure, metabolic function, and microbial co ...
DOI:
10.1016/j.biortech.2021.124731

12. Determination of soil C:N suitability zones for organic farming using an unsupervised classification in eastern Croatia

Author:
Radočaj, Dorijan; Jurišić, Mladen; Antonić, Oleg
Source:
Ecological indicators 2021 v.123 pp. 107382
ISSN:
1470-160X
Subject:
carbon nitrogen ratio,   etc   ; Food and Agriculture Organization; agricultural land; algorithms; kriging; land management; prediction; soil; soil quality; Croatia;     Show all 10 Subjects
Abstract:
... Soil carbon-to-nitrogen ratio (C:N) represents an indicator of soil quality and fertility, having a major impact on agricultural land management for organic farming. Determination of soil C:N suitability zones is a necessary procedure in the process, enabling effective land management. A total of 72 soil samples at two soil layers at 0–10 cm and 20–30 cm were used in the study, evenly distributed ...
DOI:
10.1016/j.ecolind.2021.107382

13. Enhanced denitrification performance of strain YSF15 by different molecular weight of humic acid: Mechanism based on the biological products and activity

Author:
Zhang, Shuai; Su, Junfeng; Ali, Amjad; Zheng, Zhijie; Sun, Yi
Source:
Bioresource technology 2021 v.325 pp. 124709
ISSN:
0960-8524
Subject:
carbon nitrogen ratio,   etc   ; carbon; denitrification; electron transfer; humic acids; molecular weight; nitrates; polymers; protein structure; redox potential; technology;     Show all 11 Subjects
Abstract:
... This study aimed to clarify the facilitation by humic acid (HA) fractions (>100, 100–50, 50–30, 30–10, 10–3 and < 3 kDa), as well as their variable effect on denitrification of strain YSF15 under low carbon–nitrogen ratio and nitrate conditions. All HA fractions with 7 mg L⁻¹ were able to accelerate nitrate removal by strain YSF15 and the role of carbon source was inconspicuous. The molecular weig ...
DOI:
10.1016/j.biortech.2021.124709

14. Management of banana crop waste biomass using vermicomposting technology

Author:
Mago, Monika; Yadav, Anoop; Gupta, Renuka; Garg, V.K.
Source:
Bioresource technology 2021 v.326 pp. 124742
ISSN:
0960-8524
Subject:
carbon nitrogen ratio,   etc   ; Eisenia fetida; bananas; biomass; cow manure; crop residues; earthworms; fecundity; leaves; pH; technology; vermicomposting; vermicomposts;     Show all 13 Subjects
Abstract:
... This study reports the vermicomposting of banana crop waste biomass by Eisenia fetida. Cow dung has been used as bulking agent in this study. The experiment was conducted in six vermireactors containing different ratios of banana leaf waste biomass (BL) and cow dung (CD) for 105 days. Earthworm activity significantly reduced pH, TOC, C:N and C:P ratio of the wastes. Whereas macronutrients and micr ...
DOI:
10.1016/j.biortech.2021.124742

15. Nitrogen Fertilization Modified the Responses of Schima superba Seedlings to Elevated CO2 in Subtropical China

Author:
Chen, Zhan; Ye, Siyuan; Cao, Jixin; Shang, He
Source:
Plants 2021 v.10 no.2
ISSN:
2223-7747
Subject:
carbon nitrogen ratio,   etc   ; Schima superba; carbon dioxide; carbon dioxide enrichment; leaves; nitrogen; photosynthesis; phytomass; soil; starch; China;     Show all 11 Subjects
Abstract:
... There are very few studies about the effects of relatively higher CO₂ concentration (e.g., 1000 μmol·mol⁻¹) or plus N fertilization on woody plants. In this study, Schima superba seedings were exposed to ambient or eCO₂ (550, 750, and 1000 μmol·mol⁻¹) and N fertilization (0 and 10 g·m⁻²·yr⁻¹, hereafter: low N, high N, respectively) for one growth season to explore the potential responses in a subt ...
DOI:
10.3390/plants10020383

16. Effects of Large-Scale Nitrogen Fertilization on Insect–Plant Interactions in the Canopy of Tall Alder Trees with N2-Fixing Traits in a Cool Temperate Forest

Author:
Lee, Jin; Nakamura, Masahiro; Hiura, Tsutom
Source:
Forests 2021 v.12 no.2
ISSN:
1999-4907
Subject:
carbon nitrogen ratio,   etc   ; Alnus hirsuta; Japan; canopy; leaf mass; leaves; nitrogen; nitrogen content; nitrogen fixation; proanthocyanidins; spring; summer; temperate forests;     Show all 13 Subjects
Abstract:
... Nitrogen (N) deposition is expected to influence forests. The effects of large-scale N fertilization on canopy layer insect–plant interactions in stands of tall, atmospheric nitrogen (N₂)-fixing tree species have never been assessed. We conducted a large-scale fertilization experiment (100 kg N ha⁻¹ year⁻¹ applied to approximately 9 ha) over three years (2012–2014) in a cool temperate forest in no ...
DOI:
10.3390/f12020210

17. The passivation effect of heavy metals during biochar-amended composting: Emphasize on bacterial communities

Author:
Cui, Hu; Ou, Yang; Wang, Lixia; Yan, Baixing; Li, Yingxin; Ding, Dawei
Source:
Waste management 2020 v.118 pp. 360-368
ISSN:
0956-053X
Subject:
carbon nitrogen ratio,   etc   ; bacterial communities; bioavailability; biochar; community structure; equations;     Show all 6 Subjects
Abstract:
... Available information on passivation effect of biochar on heavy metals (HMs) through regulating bacterial communities remains limited. Thus, this study investigated the correlation between bacterial diversity and HM-fractions (Zn, Cu, Cd, Cr and Pb) during composting with different dose of biochar (5% and 10%, dry weight basis), in order to ascertain the passivation effect on HMs under the influen ...
DOI:
10.1016/j.wasman.2020.08.043

18. Dynamics of nitrogenous compounds and their control in biofloc technology (BFT) systems: A review

Author:
Abakari, Godwin; Luo, Guozhi; Kombat, Emmanuel O.
Source:
Aquaculture and fisheries 2020
ISSN:
2468-550X
Subject:
carbon nitrogen ratio,   etc   ; ammonia; aquaculture; biofloc technology; nitrification; nitrogen; toxicity;     Show all 7 Subjects
Abstract:
... Controlling toxic nitrogenous substances in biofloc technology (BFT) systems is critical for the success of this novel technology. To effectively control nitrogen accumulation in BFT systems, it is important to first understand the dynamics and the removal pathways of this element and its related compounds from aquaculture water. This review focuses on synthesizing the information of nitrogen dyna ...
DOI:
10.1016/j.aaf.2020.05.005

19. Role of soluble microbial product as an intermediate electron station linking C/N and nitrogen removal performance in sequencing batch reactor

Author:
Zhang, Xuening; Sun, Yilu; Ma, Fang; Li, Ang; Yang, Jixian
Source:
Environmental research 2020 v.183 pp. 109248
ISSN:
0013-9351
Subject:
carbon nitrogen ratio,   etc   ; batch systems; denitrification; nitrogen; wastewater; wastewater treatment;     Show all 6 Subjects
Abstract:
... The C/N ratio in wastewater differs in place and time and affects the nitrogen removal performance of wastewater treatment. However, studies have focused only on the direct relationship between C/N and nitrogen removal efficiency but disregarded the significant role of soluble microbial products (SMPs) as an intermediate electron station. In this work, the contribution of SMPs to TN removal for tr ...
DOI:
10.1016/j.envres.2020.109248

20. Effects of single and mixed plant types on soil carbon and nitrogen dynamics in homestead agroforestry systems in Northern Bangladesh

Author:
Jaman, Md. Shahariar; Muraina, Taofeek O.; Dam, Quockhanh; Zhang, Xiang; Jamil, Mahbuba; Bhattarai, Sushma; Islam, Ferzana
Source:
Agriculture, ecosystems & environment 2021 v.315 pp. 107434
ISSN:
0167-8809
Subject:
carbon nitrogen ratio,   etc   ; agriculture; agroforestry; bulk density; environment; nitrogen; plant density; shrubs; soil depth; soil organic carbon; species diversity; trees; Bangladesh;     Show all 13 Subjects
Abstract:
... The importance of plant types and diversity have been focused for studying aboveground nutrients dynamics in the agroforestry system; however, a substantial knowledge gap remains for the belowground nutrients. We tested the effects of plant types (shrub vs. tree vs. tree-shrub) and diversity indices on soil organic carbon (SOC) and soil nitrogen (SN) dynamics in 64 homesteads in northern Banglades ...
DOI:
10.1016/j.agee.2021.107434