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You searched for: Publication Year 2019 Remove constraint Publication Year: 2019 Subject carbon nitrogen ratio Remove constraint Subject: carbon nitrogen ratio
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1. Achievement of partial nitrification under different carbon-to-nitrogen ratio and ammonia loading rate for the co-treatment of landfill leachate with municipal wastewater

Author:
Marco Capodici; Santo Fabio Corsino; Daniele Di Trapani; Gaspare Viviani
Source:
Biochemical engineering journal 2019 v.149 pp. 107229
ISSN:
1369-703X
Subject:
ammonia; ammonium nitrogen; biomass; carbon; carbon nitrogen ratio; denitrification; energy conservation; landfill leachates; municipal wastewater; nitrates; nitrification; nitrites; pollution load; wastewater treatment
Abstract:
... Partial nitrification (PN) is a technically and economically effective solution for the treatment of wastewater featuring low C/N ratio, allowing to achieve approximately 25% energy saving and 40% carbon source for denitrification. This study investigated the effect of different carbon to nitrogen ratio (C/N) and ammonia loading rate (ALR) on PN performances in a sequencing batch reactor (SBR) tre ...
DOI:
10.1016/j.bej.2019.05.006

2. Activity enhancement of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge process: metabolite reduction and CO2 mitigation intensification process

Author:
Arsalan Sepehri; Mohammad-Hossein Sarrafzadeh
Source:
Applied water science 2019 v.9 no.5 pp. 131
ISSN:
2190-5487
Subject:
activated sludge; ammonium; carbon dioxide; carbon nitrogen ratio; ecophysiology; metabolites; microbial communities; monitoring; nitrification; nitrifying bacteria; nitrites; nitrogen; nitrogen-fixing bacteria; polymers
Abstract:
... The interaction of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) is of considerable importance in nitrification process. Ecophysiological interactions between the communities of AOB and NOB were investigated by monitoring NO₂⁻ as the intermediate compound in an organic carbon-depleted nitrifying activated sludge fed only NH₄⁺ as a nitrogen source (40 mg/L). The presence of ...
DOI:
10.1007/s13201-019-1017-6

3. Adequacy of Drosophila melanogaster as prey for the development and reproduction of Coleomegilla maculata

Author:
Halina Schultz; Eduardo da Silva; Elen de Lima Aguiar-Menezes; André Luis Santos Resende; Janaina Ribeiro Costa Rouws; Ana Rafaela Moreira da Silva
Source:
BioControl 2019 v.64 no.1 pp. 43-54
ISSN:
1386-6141
Subject:
Coleomegilla maculata; Drosophila melanogaster; Lipaphis erysimi; biological control; carbon nitrogen ratio; fecundity; immatures; insect larvae; laboratory experimentation; mortality; nitrogen content; nutrient requirements; predators; water content
Abstract:
... Factitious prey are preferentially used to rear lady beetles in the laboratory in lieu of natural prey with an aim towards facilitating and lowering the cost of producing these predators. We tested the hypothesis that live dipteran larvae of Drosophila melanogaster Meigen (factitious prey) meet the nutritional requirements of the coleopteran Coleomegilla maculata and can substitute for its natural ...
DOI:
10.1007/s10526-018-09912-2

4. Altered leaf litter quality exacerbates the negative impact of climate change on decomposition

Author:
Iván Prieto; María Almagro; Felipe Bastida; José Ignacio Querejeta
Source:
journal of ecology 2019 v.107 no.5 pp. 2364-2382
ISSN:
0022-0477
Subject:
Helianthemum; arid lands; carbon nitrogen ratio; carbon sequestration; climate; climate change; ecosystems; fungal biomass; iron; lignin; microbial nitrogen; nitrogen cycle; nutrient availability; nutrient content; plant litter; rain; shrublands; shrubs; soil carbon; structural equation modeling
Abstract:
... Leaf litter decomposition is a key component of global biogeochemical cycles that influence soil carbon storage, nutrient availability and plant productivity. Ongoing climate change will lead to warmer and drier conditions in many dryland regions, potentially affecting litter decomposition and nutrient dynamics. Climate change effects can be direct and/or indirect, for example, through changes in ...
DOI:
10.1111/1365-2745.13168

5. Amination of biorefinery technical lignin by Mannich reaction for preparing highly efficient nitrogen fertilizer

Author:
Gao-Jie Jiao; Pai Peng; Shao-Long Sun; Zeng-Chao Geng; Diao She
Source:
International journal of biological macromolecules 2019 v.127 pp. 544-554
ISSN:
0141-8130
Subject:
active sites; amination; biorefining; carbon nitrogen ratio; leaching; lignin; moieties; nitrogen; nitrogen content; nitrogen fertilizers; reaction mechanisms; soil
Abstract:
... To develop a novel lignin-based highly efficient nitrogen fertilizer, the amination of the biorefinery technical lignin was conducted by Mannich reaction synergy with phenolation pretreatment. Subsequently, the structural transformations of lignin samples and the reaction mechanism were investigated in detail. The soil column leaching experiment was also performed to research the nitrogen release ...
DOI:
10.1016/j.ijbiomac.2019.01.076

6. Anaerobic co-digestion of catering food waste utilizing Parthenium hysterophorus as co-substrate for biogas production

Author:
Aumbreen Tayyab; Zulfiqar Ahmad; Tariq Mahmood; Azeem Khalid; Samia Qadeer; Shahid Mahmood; Shaista Andleeb; Muzammil Anjum
Source:
Biomass and bioenergy 2019 v.124 pp. 74-82
ISSN:
0961-9534
Subject:
Parthenium hysterophorus; anaerobic digestion; biogas; bioprocessing; bioreactors; carbon nitrogen ratio; catering; chemical oxygen demand; food waste; gas production (biological); kitchens; mixing ratio; organic matter; pH; public health; restaurants; risk; total solids; weeds
Abstract:
... Catering food waste is a constant concern both at home and in the restaurant kitchens. Advances in the catering industry are generating a significant amount of catering waste, which poses a significant risk to public health and the environment. The anaerobic digestion technology used to produce biogas from various substrates has attracted worldwide attention for its economics and ease of use. This ...
DOI:
10.1016/j.biombioe.2019.03.013

7. Anaerobic co-digestion of food waste with pretreated yard waste: A comparative study of methane production, kinetic modeling and energy balance

Author:
Sagarika Panigrahi; Hari Bhakta Sharma; Brajesh K. Dubey
Source:
Journal of cleaner production 2019 pp. -
ISSN:
0959-6526
Subject:
anaerobic digestion; bioenergy; carbon nitrogen ratio; comparative study; energy balance; food waste; methane production; models; yard wastes
Abstract:
... Solid state anaerobic digestion of food waste (FW) with yard waste (YW) appears to be an efficient technique for bioenergy production. However, the reluctant nature of YW and nutrient imbalance due to high C/N ratio are the two major obstacles for maximum methane production. In this study to improve the methane production potential, YW was thermally pretreated to reduce its recalcitrance nature an ...
DOI:
10.1016/j.jclepro.2019.118480

8. Anaerobic co-digestion of poultry litter and wheat straw affected by solids composition, free ammonia and carbon/nitrogen ratio

Author:
Jun Zhu; Sarah Wu; Jiacheng Shen
Source:
Journal of environmental science and health 2019 v.54 no.3 pp. 231-237
ISSN:
1532-4117
Subject:
ammonia; ammonium nitrogen; anaerobic digestion; biogas; carbon; carbon nitrogen ratio; methane; methane production; nitrogen; poultry manure; regression analysis; total solids; wheat straw
Abstract:
... In this study, the effects of three total solids levels (2%, 5% and 10% TS) of the mixtures of poultry litter and wheat straw at different percent volatile solids from wheat straw (0%, 25% and 50% VSWS), free ammonia nitrogen (FAN) and C/N ratio on co-digesting poultry litter with wheat straw were studied in batch experiments operated at 37 °C. The results showed that adjusting the substrate C/N r ...
DOI:
10.1080/10934529.2018.1546494

9. Anaerobic digestion of agricultural manure and biomass – Critical indicators of risk and knowledge gaps

Author:
Rajat Nag; Agathe Auer; Bryan K. Markey; Paul Whyte; Stephen Nolan; Vincent O'Flaherty; Lauren Russell; Declan Bolton; Owen Fenton; Karl Richards; Enda Cummins
Source:
Science of the total environment 2019 v.690 pp. 460-479
ISSN:
0048-9697
Subject:
European Union; agricultural land; anaerobic digestion; animal manures; biogas; biomass; carbon nitrogen ratio; data collection; environmental health; farms; feedstocks; humans; laws and regulations; models; nutrients; pH; pathogens; risk; risk assessment process; slurries; soil conditioners; storage time; sustainable technology; temperature
Abstract:
... Anaerobic digestion (AD) has been identified as a potential green technology to treat food and municipal waste, agricultural residues, including farmyard manure and slurry (FYM&S), to produce biogas. FYM&S and digestate can act as soil conditioners and provide valuable nutrients to plants; however, it may also contain harmful pathogens. This study looks at the critical indicators in determining th ...
DOI:
10.1016/j.scitotenv.2019.06.512

10. Anaerobic digestion of wetland biomass from conservation management for biogas production

Author:
Sławomir Roj-Rojewski; Agnieszka Wysocka-Czubaszek; Robert Czubaszek; Andrzej Kamocki; Piotr Banaszuk
Source:
Biomass and bioenergy 2019 v.122 pp. 126-132
ISSN:
0961-9534
Subject:
Carex elata; Carex lasiocarpa; Glyceria maxima; Phalaris arundinacea; Phragmites australis; aboveground biomass; anaerobic digestion; biogas; carbon nitrogen ratio; energy; gas production (biological); grasses; grasslands; methane; methane production; national parks; river valleys; summer; wetland plants; wetlands; Poland
Abstract:
... In this study, we examined the biogas and methane production of wetland plants species harvested in the Narew River Valley protected as national park, NE Poland. In the experiment, we used the aboveground biomass of five species: reed canary grass (Phalaris arundinacea), common reed (Phragmites australis), reed sweet-grass (Glyceria maxima), tufted sedge (Carex elata) and woollyfruit sedge (Carex ...
DOI:
10.1016/j.biombioe.2019.01.038

11. Anaerobic digestion of wheat straw and rape oil cake in a two-stage solid-state system

Author:
Marcel Pohl; Maria Sánchez-Sánchez; Jan Mumme
Source:
Renewable energy 2019 v.141 pp. 359-367
ISSN:
0960-1481
Subject:
ammonium; anaerobic digestion; carbon nitrogen ratio; methane production; rapeseed oil; renewable energy sources; streams; temperature; volatile fatty acids; wheat straw
Abstract:
... In this study, the anaerobic co-digestion of two abundantly available agricultural waste streams, rape oil cake and wheat straw, was investigated using the upflow anaerobic solid-state (UASS) process. The experiment was carried out in two identically constructed UASS systems operated for 154 days at 37 °C and 55 °C, respectively, and at organic loading rates (OLR) of 2.5, 3.5 and 4.5 gVS L−1 d−1. ...
DOI:
10.1016/j.renene.2019.04.021

12. Application of Biogas Digestate with Rice Straw Mitigates Nitrate Leaching Potential and Suppresses Root-Knot Nematode (Meloidogyne incognita)

Author:
Yuexi Wang; Seiya Chikamatsu; Tuya Gegen; Kozue Sawada; Koki Toyota; Shohei Riya; Masaaki Hosomi
Source:
Agronomy 2019 v.9 no.5 pp. -
ISSN:
2073-4395
Subject:
Meloidogyne incognita; ammonium nitrogen; application rate; biogas; carbon nitrogen ratio; gardens; leaching; mineral fertilizers; nematicidal properties; nitrates; pig manure; rice straw; root-knot nematodes; soil; soil treatment
Abstract:
... This study investigated the effects of biogas digestate application to soil with rice straw on nitrate leaching potential and nematicidal activity toward root-knot nematodes Meloidogyne incognita. The following seven treatments were set up: (i) control (CONT); (ii) chemical fertilizer (CF); (iii) wet biogas digestate derived from pig manure (WBD); (iv) and (v) dry biogas digestate derived from a m ...
DOI:
10.3390/agronomy9050227

13. Application of N Fertilizer to Sugarcane Mulches: Consequences for the Dynamics of Mulch Decomposition and CO2 and N2O Fluxes

Author:
Vladislav Kyulavski; Sylvie Recous; Patricia Garnier; Jean-Marie Paillat; Laurent Thuriès
Source:
BioEnergy research 2019 v.12 no.3 pp. 484-496
ISSN:
1939-1234
Subject:
carbon; carbon dioxide; carbon nitrogen ratio; environmental impact; farming systems; fertilizer application; greenhouse gas emissions; greenhouse gases; mulches; mulching; nitrogen; nitrogen fertilizers; nitrous oxide; organic fertilizers; pig manure; sewage sludge; soil; soil carbon; sugarcane; urea
Abstract:
... Using organic fertilizers on sugarcane mulches is a potentially interesting substitute for mineral fertilization in terms of economic and environmental impacts. However, no general agreement exists regarding the short-term effect of combining mulching and organic fertilization on greenhouse gas (GHG) emissions. Therefore, we studied different mixtures in the field by combining two amounts of sugar ...
DOI:
10.1007/s12155-019-10001-0

14. Assessing ecosystem functioning in forests undergoing restoration

Author:
Milena Fermina Rosenfield; Sandra Cristina Müller
Source:
Restoration ecology 2019 v.27 no.1 pp. 158-167
ISSN:
1061-2971
Subject:
carbon nitrogen ratio; detritivores; ecosystems; functional diversity; natural regeneration; soil; species richness; trees; tropical forests; vegetation structure; Brazil
Abstract:
... Restoration projects may have broad and complex ecological goals that require distinct and integrative measures for evaluating restoration development and success. However, most studies usually evaluate structural and species composition parameters, with less emphasis on ecological processes and functioning. The main objective of this study is to use an integrated approach that considers structura ...
DOI:
10.1111/rec.12828

15. Assessing the influence of the hydraulic retention time and carbon/nitrogen ratio on urban wastewater treatment in a new anoxic-aerobic algal-bacterial photobioreactor configuration

Author:
Alma Toledo-Cervantes; Esther Posadas; Isabel Bertol; Sara Turiel; Ana Alcoceba; Raúl Muñoz
Source:
Algal research 2019 v.44 pp. 101672
ISSN:
2211-9264
Subject:
Chlorella vulgaris; Phormidium; biomass; carbon; carbon nitrogen ratio; chemical oxygen demand; microalgae; municipal wastewater; nitrogen; photobioreactors; recycling; total nitrogen; total suspended solids; wastewater treatment
Abstract:
... The influence of the hydraulic retention time (HRT) (2 and 4 days) and the carbon/nitrogen ratio (C/N) (7, 8 and 9) of the wastewater on the treatment of synthetic domestic wastewater was evaluated in a new anoxic-aerobic algal-bacterial photobioreactor configuration operated at solids retention time of 10 d by biomass recycling and withdrawal. The removal of chemical oxygen demand remained betwee ...
DOI:
10.1016/j.algal.2019.101672

16. Assessment of Seasonal and Site-Specific Variations in Soil Physical, Chemical and Biological Properties Around Opencast Coal Mines

Author:
Bhanu PANDEY; Arideep MUKHERJEE; Madhoolika AGRAWAL; Siddharth SINGH
Source:
Pedosphere 2019 v.29 no.5 pp. 642-655
ISSN:
1002-0160
Subject:
carbon nitrogen ratio; coal; electrical conductivity; heavy metals; microbial biomass; mining; nitrogen content; phosphorus; porosity; seasonal variation; soil biological properties; soil microorganisms; soil pH; soil quality; soil respiration; soil temperature; sulfates; summer; water content; water holding capacity; India
Abstract:
... Coal mining adversely affects soil quality around opencast mines. Therefore, a study was conducted in 2010 and 2011 to assess seasonal and site-specific variations in physical, chemical, and biological properties of soil collected at different distances from mining areas in the Jharia coalfield, India. Throughout the year, the soil in sites near coal mines had a significantly higher bulk density, ...
DOI:
10.1016/S1002-0160(17)60431-4

17. Automated Subdaily Sampling of Cyanobacterial Toxins on a Buoy Reveals New Temporal Patterns in Toxin Dynamics

Author:
Todd R. Miller; Sarah L. Bartlett; Chelsea A. Weirich; John Hernandez
Source:
Environmental science & technology 2019 v.53 no.10 pp. 5661-5670
ISSN:
1520-5851
Subject:
Cyanobacteria; automation; carbon nitrogen ratio; drinking water; lakes; microcystins; monitoring; periodicity; principal component analysis; public health; tandem mass spectrometry; temporal variation; time series analysis; variance; water quality; wavelet; wind direction; wind speed
Abstract:
... Temporal variability of toxins produced by cyanobacteria in lakes is relatively unknown at time scales relevant to public health (i.e., hourly). In this study, a water quality monitoring buoy was outfitted with an automated water sampler taking preserved samples every 6 h for 68.75 days over a drinking water intake. A total of 251 samples were analyzed by tandem mass spectrometry for 21 cyanotoxin ...
DOI:
10.1021/acs.est.9b00257

18. Bacteria-supported iron scraps for the removal of nitrate from low carbon-to-nitrogen ratio wastewater

Author:
Xiawei Liu; Jian Xu; Jiaolong Huang; Manqi Huang; Tao Wang; Shaopan Bao; Wei Tang; Tao Fang
Source:
RSC advances 2019 v.9 no.6 pp. 3285-3293
ISSN:
2046-2069
Subject:
Hydrogenophaga; bacteria; carbon nitrogen ratio; denitrification; high-throughput nucleotide sequencing; iron; nitrates; synergism; wastewater
Abstract:
... A novel bacteria-supported iron scraps (BSIS) system was developed for nitrate removal from low carbon-to-nitrogen ratio (C/N) wastewater. The system consisted of low-cost iron scraps and the accumulated denitrifying-related bacteria enriched from an Fe-wastewater environment when the system was operating. After operating for 39 d, the nitrate removal rate of the system increased to 73.55% within ...
DOI:
10.1039/c8ra09091b

19. Bacterial IAA-Delivery into Medicago Root Nodules Triggers a Balanced Stimulation of C and N Metabolism Leading to a Biomass Increase

Author:
Roberto Defez; Anna Andreozzi; Silvia Romano; Gabriella Pocsfalvi; Immacolata Fiume; Roberta Esposito; Claudia Angelini; Carmen Bianco
Source:
Microorganisms 2019 v.7 no.10 pp. -
ISSN:
2076-2607
Subject:
Ensifer meliloti; Medicago sativa; adenosine triphosphate; amino acids; biomass; biosynthesis; carbon; carbon nitrogen ratio; enzyme activity; genomics; indole acetic acid; legumes; nitrogen fixation; nitrogenase; organic acids and salts; photosynthesis; plant growth; plant growth-promoting rhizobacteria; ribulose-bisphosphate carboxylase; root nodules; sugars; total nitrogen
Abstract:
... Indole-3-acetic acid (IAA) is the main auxin acting as a phytohormone in many plant developmental processes. The ability to synthesize IAA is widely associated with plant growth-promoting rhizobacteria (PGPR). Several studies have been published on the potential application of PGPR to improve plant growth through the enhancement of their main metabolic processes. In this study, the IAA-overproduci ...
DOI:
10.3390/microorganisms7100403
PubMed:
31569530
PubMed Central:
PMC6843515

20. Biochar Effects on Soil Properties and Wheat Biomass vary with Fertility Management

Author:
Prakriti Bista; Rajan Ghimire; Stephen Machado; Larry Pritchett
Source:
Agronomy 2019 v.9 no.10 pp. -
ISSN:
2073-4395
Subject:
biochar; carbon nitrogen ratio; fertilizer rates; fertilizers; nitrates; phosphorus; phytomass; potassium; roots; shoots; silt; soil organic matter; soil pH; soil quality; sulfur; wheat; wood
Abstract:
... Biochar can improve soil health and crop productivity. We studied the response of soil properties and wheat growth to four rates of wood biochar (0, 11.2, 22.4, and 44.8 Mg ha−1) and two fertilizer rates [no fertilizer and fertilizer (90 kg N ha−1, 45 kg P ha−1, and 20 kg S ha−1)]. Biochar application increased soil organic matter (SOM), soil pH, phosphorus (P), potassium ( ...
DOI:
10.3390/agronomy9100623