N2O emission factors of full-scale animal manure windrow composting in cold and warm seasons

2020 ◽  
Vol 316 ◽  
pp. 123905
Author(s):  
Jiaxi Zheng ◽  
Jibao Liu ◽  
Shenghui Han ◽  
Yawei Wang ◽  
Yuansong Wei
Keyword(s):  
Animal Manure ◽  
N2o Emission ◽  
Emission Factors ◽  
Full Scale ◽  
Windrow Composting

scholarly journals Anaerobic Digestion and Removal of Sulfamethoxazole, Enrofloxacin, Ciprofloxacin and Their Antibiotic Resistance Genes in a Full-Scale Biogas Plant

Antibiotics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 502
Author(s):  
Andrea Visca ◽  
Anna Barra Caracciolo ◽  
Paola Grenni ◽  
Luisa Patrolecco ◽  
Jasmin Rauseo ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Anaerobic Digestion ◽  
Resistance Genes ◽  
Emerging Contaminants ◽  
Antibiotic Resistance Genes ◽  
Animal Manure ◽  
Full Scale ◽  
Antibiotic Residues ◽  
Anaerobic Digesters ◽  
One Year

Anaerobic digestion is one of the best ways to re-use animal manure and agricultural residues, through the production of combustible biogas and digestate. However, the use of antibiotics for preventing and treating animal diseases and, consequently, their residual concentrations in manure, could introduce them into anaerobic digesters. If the digestate is applied as a soil fertilizer, antibiotic residues and/or their corresponding antibiotic resistance genes (ARGs) could reach soil ecosystems. This work investigated three common soil emerging contaminants, i.e., sulfamethoxazole (SMX), ciprofloxacin (CIP), enrofloxacin (ENR), their ARGs sul1, sul2, qnrS, qepA, aac-(6′)-Ib-cr and the mobile genetic element intI1, for one year in a full scale anaerobic plant. Six samplings were performed in line with the 45-day hydraulic retention time (HRT) of the anaerobic plant, by collecting input and output samples. The overall results show both antibiotics and ARGs decreased during the anaerobic digestion process. In particular, SMX was degraded by up to 100%, ENR up to 84% and CIP up to 92%, depending on the sampling time. In a similar way, all ARGs declined significantly (up to 80%) in the digestate samples. This work shows how anaerobic digestion can be a promising practice for lowering antibiotic residues and ARGs in soil.

Application of Data Driven techniques to Predict N2O Emission in Full-scale WWTPs

2018 ◽  
Author(s):  
Morad Danishvar ◽  
Vasileia Vasilaki ◽  
Zhengwen Huang ◽  
Evina Katsou ◽  
Ali Mousavi
Keyword(s):  
N2o Emission ◽  
Full Scale ◽  
Data Driven

scholarly journals Groundwater N<sub>2</sub>O emission factors of nitrate-contaminated aquifers as derived from denitrification progress and N<sub>2</sub>O accumulation

2008 ◽  
Vol 5 (5) ◽  
pp. 1215-1226 ◽  
Author(s):  
D. Weymann ◽  
R. Well ◽  
H. Flessa ◽  
C. von der Heide ◽  
M. Deurer ◽  
...  
Keyword(s):  
Emission Factor ◽  
Noble Gas ◽  
N2o Emission ◽  
Emission Factors ◽  
N2o Emissions ◽  
Northern Germany ◽  
Stable Component ◽  
Sand And Gravel ◽  
First Time ◽  
Ipcc Default

Abstract. We investigated the dynamics of denitrification and nitrous oxide (N2O) accumulation in 4 nitrate (NO−3) contaminated denitrifying sand and gravel aquifers of northern Germany (Fuhrberg, Sulingen, Thülsfelde and Göttingen) to quantify their potential N2O emission and to evaluate existing concepts of N2O emission factors. Excess N2 – N2 produced by denitrification – was determined by using the argon (Ar) concentration in groundwater as a natural inert tracer, assuming that this noble gas functions as a stable component and does not change during denitrification. Furthermore, initial NO−3 concentrations (NO−3 that enters the groundwater) were derived from excess N2 and actual NO−3 concentrations in groundwater in order to determine potential indirect N2O emissions as a function of the N input. Median concentrations of N2O and excess N2 ranged from 3 to 89 μg N L−1 and from 3 to 10 mg N L−1, respectively. Reaction progress (RP) of denitrification was determined as the ratio between products (N2O-N + excess N2) and starting material (initial NO−3 concentration) of the process, characterizing the different stages of denitrification. N2O concentrations were lowest at RP close to 0 and RP close to 1 but relatively high at a RP between 0.2 and 0.6. For the first time, we report groundwater N2O emission factors consisting of the ratio between N2O-N and initial NO−3-N concentrations (EF1). In addition, we determined a groundwater emission factor (EF2) using a previous concept consisting of the ratio between N2O-N and actual NO−3-N concentrations. Depending on RP, EF(1) resulted in smaller values compared to EF(2), demonstrating (i) the relevance of NO−3 consumption and consequently (ii) the need to take initial NO−3-N concentrations into account. In general, both evaluated emission factors were highly variable within and among the aquifers. The site medians ranged between 0.00043–0.00438 for EF(1) and 0.00092–0.01801 for EF(2), respectively. For the aquifers of Fuhrberg and Sulingen, we found EF(1) median values which are close to the 2006 IPCC default value of 0.0025. In contrast, we determined significant lower EF values for the aquifers of Thülsfelde and Göttingen. Summing the results up, our study supports the substantial downward revision of the IPCC default EF5-g from 0.015 (1997) to 0.0025 (2006).

scholarly journals Re-quantifying the emission factors based on field measurements and estimating the direct N2O emission from Chinese croplands

2004 ◽  
Vol 18 (2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Xunhua Zheng ◽  
Shenghui Han ◽  
Yao Huang ◽  
Yuesi Wang ◽  
Mingxing Wang
Keyword(s):  
Field Measurements ◽  
N2o Emission ◽  
Emission Factors

N2O emission factors from a wastewater irrigated land in a semiarid environment in Mexico

2020 ◽  
Vol 709 ◽  
pp. 136177
Author(s):  
Blanca González-Méndez ◽  
Luis Gerardo Ruiz-Suárez ◽  
Christina Siebe
Keyword(s):  
N2o Emission ◽  
Emission Factors ◽  
Semiarid Environment

N2O fluxes and direct N2O emission factors from maize cultivation on Oxisols in Thailand

2020 ◽  
Vol 20 ◽  
pp. e00244 ◽  
Author(s):  
Monthira Yuttitham ◽  
Amnat Chidthaisong ◽  
Ukrit Ruangchu
Keyword(s):  
N2o Emission ◽  
Emission Factors ◽  
Maize Cultivation ◽  
N2o Fluxes

Developing spatially stratified N2O emission factors for Europe

2011 ◽  
Vol 159 (11) ◽  
pp. 3223-3232 ◽  
Author(s):  
Adrian Leip ◽  
Mirko Busto ◽  
Wilfried Winiwarter
Keyword(s):  
N2o Emission ◽  
Emission Factors

Assessment of Indirect N2O Emission Factors from Agricultural River Networks Based on Long-Term Study at High Temporal Resolution

2019 ◽  
Vol 53 (18) ◽  
pp. 10781-10791 ◽  
Author(s):  
Xiaobo Qin ◽  
Yong Li ◽  
Stefanie Goldberg ◽  
Yunfan Wan ◽  
Meirong Fan ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
N2o Emission ◽  
Emission Factors ◽  
River Networks ◽  
High Temporal Resolution ◽  
Term Study ◽  
Long Term Study

Biofiltration of dichlorobenzenes

2001 ◽  
Vol 44 (9) ◽  
pp. 287-293 ◽  
Author(s):  
F. Roberge ◽  
M.J. Gravel ◽  
L. Deschênes ◽  
C. Guy ◽  
R. Samson
Keyword(s):  
Gas Phase ◽  
Contaminated Soil ◽  
Cooling System ◽  
Ambient Air ◽  
Animal Manure ◽  
Full Scale ◽  
Peat Moss ◽  
Aerobic Treatment ◽  
Load Variations ◽  
System A

The use of air biofiltration for the degradation of dichlorobenzenes (1,2-DCB and 1,4-DCB) was studied at a refinery site. At this plant, 93 m3/h of contaminated groundwater, used in a cooling system and containing a maximum of 2 ppm of dichlorobenzenes, had to be treated. Stripping of the DCBs followed by biofiltration was selected as the most suitable technology to avoid volatilization in ambient air as expected with a wastewater aerobic treatment system. A stripper of 15 m height and 1.27 m diameter was designed as a first step treatment to volatilize DCBs with 3400 m3/h of air. Two full-scale biofilters of 70 m3 each were built and filled with 45 m3 of filtering media for the adsorption and biodegradation of the DCBs in the gas-phase. Filtering media was composed mainly of peat moss, with animal manure, wood chips and DCBs contaminated soil. Air to be treated was also contaminated with naphthalene. Laboratory tests showed an effective microbial activity in the contaminated soil and in the filtering media for DCBs degradation. Degradation of naphthalene induced slower degradation of DCBs. Full-scale operation was studied during four months. Water flow and DCBs content in the water entering the stripper were lower than expected with only 57 m3/h and a maximum concentration of only 240 ppb. Effective desorption was obtained in the stripper in the full-scale operation (more than 99% removal). Full-scale biofilters maintained a DCB concentration of less than 1 ppmv in the air outlet, but removal efficiency varied between 0 and 79% because of the low DCB inlet concentrations, load variations and sporadic naphthalene presence.

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