Structure Optimization and Data Processing Method of Electronic Nose Bionic Chamber for Detecting Ammonia Emissions from Livestock Excrement Fermentation

Sensors, Journal Year: 2024, Volume and Issue: 24(5), P. 1628 - 1628

Published: March 1, 2024

In areas where livestock are bred, there is a demand for accurate, real-time, and stable monitoring of ammonia concentration in the breeding environment. However, existing electronic nose systems have slow response times limited detection accuracy. this study, we introduce novel solution: bionic chamber construction optimized, sensor data analyzed using an intelligent algorithm. We analyze structure biomimetic surface airflow array to determine sensing units system. The system employs detect ethanol gases circulating within closed box. captured signals processed, followed by application classification regression models prediction. Our results suggest that system, leveraging chamber, offers rapid gas times. A high prediction accuracy, with determination coefficient R2 value 0.99 single-output over 0.98 multi-output predictions, achieved incorporating backpropagation (BP) neural network These outcomes demonstrate effectiveness nose, based on optimized combined BP algorithm, accurately detecting emitted during excreta fermentation, satisfying requirements farms.

Language: Английский

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Monitoring atmospheric ammonia with satellite and on-field gas sensor array measurement techniques

2019 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN), Journal Year: 2024, Volume and Issue: unknown, P. 1 - 4

Published: May 12, 2024

The purpose of this research is evaluating the potential different gas sensor arrays for small scale, in-situ atmospheric ammonia detection, to counterbalance shortcomings satellite detection. In order achieve this, one drone-based and 20 ground-based will be developed, aiming highest sensitivity & selectivity possible, amongst other important characteristics. It note that concentration can differ significantly as a function regionality time. As result, types sensors tested in both controlled laboratory environments, develop best suited with high ammonia, besides ensuring detection over large range concentrations.

Language: Английский

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Measurement report: Urban ammonia and amines in Houston, Texas

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(19), P. 11351 - 11363

Published: Oct. 11, 2024

Abstract. Ammonia and amines play critical roles in secondary aerosol formation, especially urban environments. However, fast measurements of ammonia the atmosphere are very scarce. We measured with a chemical ionization mass spectrometer (CIMS) at center Houston, Texas, fourth most populated site United States, during October 2022. concentrations were on average four parts per billion by volume (ppbv), while concentration an individual amine ranged from several trillion (pptv) to hundreds pptv. These reduced nitrogen compounds more abundant weekdays than weekends correlated CO concentrations, implying they mostly emitted pollutant sources. Both showed distinct diurnal cycle, higher warmer afternoon, indicating dominant gas-to-particle conversion processes taking place changing ambient temperatures. Studies have shown that dimethylamine is for new particle formation (NPF) polluted boundary layer, but currently there no emission inventories global climate models (as opposed ammonia). Our observations made area as well less (Kent, Ohio) our previous study (You et al., 2014), indicate consistent ratio over these two sites. Thus, can provide relatively constrained proxy using 0.1 % sites States model NPF processes.

Language: Английский

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Its Meteorology-Based Prediction Using LSTM Neural Network

Published: Jan. 1, 2024

Due to manmade activities and natural calamities, the air quality that we breathe is degrading. Air index (AQI) depends on multiple factors such as concentration of different pollutants in air, meteorological parameters, traffic density, etc. Using Pearson Coefficient, it was established, PM10, PM2.5 has perfect association with AQI having R values 0.97 0.99, whereas other pollutants, CO O3 have 0.51 0.42, respectively. Meteorological parameters like diurnal temperature, pressure positive correlation 0.47 0.58. Other humidity, dew point, wind speed a negative relationship AQI, − 0.57, 0.64, 0.43, Multiple combination normalized unnormalized input feature vectors, created using two workflows, used implement LSTM models. It observed model target variable five pressure, outperformed all combinations, achieving RMSE 30.313 scale 0–500 R2 score 0.801. Furthermore, training validation show larger number epochs can help improving prediction accuracy.

Language: Английский

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Comment on egusphere-2024-1230

Published: May 29, 2024

Abstract. Ammonia and amines play critical roles in secondary aerosol formation, especially urban environments. However, fast measurements of ammonia the atmosphere are very scarce. We measured with a chemical ionization mass spectrometer (CIMS) at center Houston, Texas, fourth most populated site United States, during October 2022. concentrations were on average 4 parts per billion volume (ppbv), while concentration an individual amine ranged from several trillion (pptv) to hundreds pptv. These reduced nitrogen compounds more abundant weekdays than weekends correlated CO concentrations, implying they mostly emitted pollutant sources. Both showed distinct diurnal cycle, higher warmer afternoon, indicating dominant gas-to-particle conversion processes taking place changing ambient temperatures. Studies have shown that dimethylamine is for new particle formation (NPF), but currently, there no emission inventories global climate models (as opposed ammonia). Our observations show general positively ammonia, it reasonable use scaled-down (e.g., 0.1 %) as proxy simulate NPF processes.

Language: Английский

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Comment on egusphere-2024-1230

Published: June 16, 2024

Abstract. Ammonia and amines play critical roles in secondary aerosol formation, especially urban environments. However, fast measurements of ammonia the atmosphere are very scarce. We measured with a chemical ionization mass spectrometer (CIMS) at center Houston, Texas, fourth most populated site United States, during October 2022. concentrations were on average 4 parts per billion volume (ppbv), while concentration an individual amine ranged from several trillion (pptv) to hundreds pptv. These reduced nitrogen compounds more abundant weekdays than weekends correlated CO concentrations, implying they mostly emitted pollutant sources. Both showed distinct diurnal cycle, higher warmer afternoon, indicating dominant gas-to-particle conversion processes taking place changing ambient temperatures. Studies have shown that dimethylamine is for new particle formation (NPF), but currently, there no emission inventories global climate models (as opposed ammonia). Our observations show general positively ammonia, it reasonable use scaled-down (e.g., 0.1 %) as proxy simulate NPF processes.

Language: Английский

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Datalogger prototyping for NH3 ground concentrations measures and comparison with NH3-IASI generated datamaps

AIUB Journal of Science and Engineering (AJSE), Journal Year: 2024, Volume and Issue: 23(2), P. 177 - 185

Published: Aug. 30, 2024

Ammonia (NH3) gas is dangerous as it highly toxic and irritating so, causes severe burning of the eyes respiratory problems (throat lung damages) when inhaled in high concentrations. It a colorless gas, with strong suffocating odor. also flammable (and may form an explosive mixture air, heated), can dissolve water to ammonium hydroxide solution, corrosive agent for any metallic based structures like bridges, boats, tanks, etc… react other atmospheric pollutants, primarily SO2 NOx, generating fine particulate matter which pass through lungs blood. In hand, considered industrial useful hydrogen carrier energy, additive coal-fired power plants, slowly shifting from its natural use fertilizer agricultural industry “green clean” fuel source. this article, we describe detail electrochemical sensor driven by microcontroller. The principle measurement system chemical oxidation catalyst metals, where conductivity varies target concentration. Mathematical calculations are provided convert 10-bit numerical counts meaningful NH3 concentrations ppm, taking into account temperature dependency correction.

Language: Английский

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Ammonia and ethanol detection via an electronic nose utilizing a bionic chamber and a sparrow search algorithm–optimized backpropagation neural network

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(12), P. e0309228 - e0309228

Published: Dec. 3, 2024

Ammonia is widely acknowledged to be a stressor and one of the most detrimental gases in animal enclosures. In livestock- poultry-breeding facilities, precise, rapid, affordable method for detecting ammonia concentrations essential. We design develop an electronic nose system containing bionic chamber that imitates nasal-cavity structure humans canines. The sensors are positioned based on fluid simulation results. Response data ethanol response/ recovery times sensor under three collected using system. classified regressed sparrow search algorithm (SSA)-optimized backpropagation neural network (BPNN). results show has relative mean deviation 1.45%. sensor’s output voltage 1.3–2.05 V when concentration ranges from 15 300 ppm. gas 1.89–3.15 8 200 average response time 13 s slower than directly exposed being measured, while 19 faster. tests comparing performance SSA-BPNN, support vector machine (SVM), random forest (RF) models, SSA-BPNN achieves 99.1% classification accuracy, better SVM RF models. It also outperforms other models at regression prediction, with smaller absolute, root square errors. Its coefficient determination (R 2 ) greater 0.99, surpassing those theoretical experimental both indicate proposed chamber, used offers promising approach facilities.

Language: Английский

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Kualitas Udara Akibat Lumpur Lapindo dan Keluhan Kesehatan Masyarakat

Jurnal Sanitasi Lingkungan, Journal Year: 2023, Volume and Issue: 3(2), P. 53 - 60

Published: Nov. 5, 2023

Latar Belakang: Semburan lumpur panas yang keluar akibat kesalahan kerja dari PT. Lapindo Brantas mengakibatkan keluarnya gas berbahaya salah satunya adalah amonia (NH3). Kadar melebihi standar dapat efek terhadap penurunan kualitas kesehatan pada tubuh manusia. Tujuan penelitian ini mengetahui udara lapindo dan keluhan masyarakat. Metode: Penelitian deskriptif observasional dengan populasi sebanyak 110 responden sampel 52 responden. Teknik pengambilan digunakan ialah simple random sampling. karena seluruh memiliki kesempatan sama untuk sampel. pengumpulan data menggunakan pengukuran lapangan, observasi wawancara. Hasil: Hasil fisik rata-rata suhu mencapai 28,5oC telah memenuhi berdasarkan PMK No. 2 Tahun 2023, kelembaban 74,5% 2023 kecepatan angin sebesar 1,1 m/s kategori sepoi-sepoi departemen kesehatan. juga menunjukkan kadar 0,11 ppm Pergub Jatim No 10 2009. hasil iritasi tertinggi hidung terendah kerongkongan serta gangguan didapatkan pusing mual. Kesimpulan: Kesimpulan dalam baku mutu masyarakat mengalami pusing. Kata kunci : Lumpur lapindo, amonia,

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Energy-Efficient Chemiresistive Sensor Array Based on SWCNT Networks, WO3 Nanochannels and SWCNT-Pt Heterojunctions for NH3 Detection against the Background Humidity

Chemosensors, Journal Year: 2022, Volume and Issue: 10(11), P. 476 - 476

Published: Nov. 12, 2022

Recently, promising results have been achieved in improving the sensitivity to ammonia gas sensors through use of structures composed heterojunctions or nanochannels. However, their is highly dependent on background humidity under air conditions. The sensor which could ensure selective detection with a low limit, despite interference from changing humidity, remain demanded. In this work, we consider sensing units containing (i) nanochannels formed by continuous tungsten oxide nanolayer appear contact between single-walled carbon nanotubes (SWCNTs) and Pt sublayer (ii) SWCNT-Pt junctions frames mass-scale microelectronic technologies. SWCNTs were deposited spray-coating thin WO3/Pt/W photolithographic pattern be accompanied satellite samples just for reference purposes. We elucidate specific differences that appeared response based WO3 relative SWCNT similar network density. Particularly, while NH3 vapors mixed dry observed each type, reduced significantly presence 45 rel.%, especially case nanochannel even at room temperature. A multisensor array four various involving junctions, nanochannels, satellite-only-SWCNT ones allowed us determine correct concentration via utilizing linear discriminant analysis humidity. Thus, such an energy-efficient system can used environmental monitoring content, health monitoring, other applications.

Language: Английский

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