High Concentrations Of Carbon Dioxide Research Articles

Extreme Physiology Extreme Tolerance to Hypoxia, Hypercapnia, and Pain in the Naked Mole-Rat

Challenging environmental conditions can drive the evolution of extreme physiological traits. The naked mole-rat has evolved to survive and thrive in a low oxygen, high carbon dioxide environment that would be deadly to humans and most other mammals. The naked mole-rat’s lifestyle is unusual in that this species combines subterranean living and living in large, social groups of up to 300 + individuals. Many respiring animals in a closed environment can lead to depletion of oxygen (hypoxia) and accumulation of carbon dioxide (hypercapnia). Naked mole-rats display a variety of physiological traits that negate the adverse effects of living in this atmosphere. For hypoxia tolerance, naked mole-rats have a low resting metabolism, high affinity hemoglobin, intrinsic brain tolerance, the ability to use fructose for anaerobic glycolysis, and the ability to enter a low energy, suspended animation-like state. For hypercapnia tolerance, these animals have a mutation in a voltage gated sodium channel that effectively eliminates neuronal responses to tissue acidosis. In other mammals, acidosis from exposure to high concentrations of carbon dioxide induces pain and pulmonary edema. Understanding these mechanisms of extreme physiology is not only inherently interesting, but it may lead to biomedical breakthroughs in research on heart attacks, strokes, and pain pathologies.

Prediction Model of Carbon Dioxide Concentration in Pig House Based on Deep Learning

The air environment (e.g., high concentration of carbon dioxide) in a pig house will affect the health conditions and growth performance of the pigs, and the quality of pork as well. In order to reduce the cumulative concentration of carbon dioxide in the pig house, the prediction model was established by the deep learning method to predict the changes of the carbon dioxide cumulative concentration in a pig house. This model will also be used for the real-time monitoring and adjustment of the concentration of carbon dioxide of the pig house. The experiment was designed to collect environmental parameters (e.g., temperature, humidity, wind speed, and carbon dioxide concentration) data in the pig house for several months. The ensemble empirical mode decomposition–gated recurrent unit (EEMD–GRU) prediction model was established in the prediction of carbon dioxide concentration in the pig house. The results show that compared with the other models, the prediction accuracy of the EEMD–GRU model is the highest, and the root mean square error (RMSE), mean absolute error (MAE), mean absolute percentage error (MAPE), and r-squared (R2) of carbon dioxide concentration in autumn and winter are 123.2 ppm, 88.3 ppm, 3.2%, and 0.99, respectively. The RMSE, MAE, MAPE, and R2 for carbon dioxide concentration are 129.1 ppm, 93.2 ppm, 5.9%, and 0.76 in spring and summer. The prediction model proposed in this paper can effectively predict the concentration of carbon dioxide in the pig house and provide effective help for the precise control of the pig house environment.

Quantification of the Effects of Electrical and CO2 Stunning on Selected Quality Attributes of Fresh Pork: A Meta-Analysis.

Simple SummaryStunning is an important and statutory pre-slaughter process that aims to induce a state of unconsciousness and insensibility to pain just before sticking and bleeding out. In Europe, two main stunning methods that are applied at pig slaughter are electrical (ES) and gas stunning with high-concentration carbon dioxide (CO2). Stunning is not only crucial in terms of the welfare of pigs at slaughter, but it may also have effects on meat quality. Various studies have compared these two methods with respect to meat-quality traits. In several studies, stunning with CO2 has been shown to improve meat quality in comparison with ES; however, other research indicated that ES enhanced the meat quality as opposed to CO2 or had no significant effect. The current study analysed the combined results of independent research and experiments to achieve quantitative evidence of the effects of two stunning methods, electrical and gas with a high concentration of carbon dioxide, on selected quality attributes of fresh pork. The results of the meta-analysis revealed that relative to CO2 stunning, overall, ES pigs had a lower pH1, higher drip loss (DL) and lightness (L*). However, the greater alterations in these traits were achieved with the application of the head-to-back (HB) electrical-stunning method and conventional chilling (Conv.) of the carcasses. The results of the meta-analysis provide evidence that differences between these two stunning methods in DL and L* may be diminished by the application of the head-only (HO) or head-to-body (HBO) method, followed by the fast chilling of the carcasses.Stunning is a statutory pre-slaughter process that may affect the quality of pork. The objective of this study was quantification of the effects of stunning (ES vs. CO2 stunning) on selected quality attributes of pork, using a meta-analytical approach. Data from 18 publications with 46 individual experiments were combined using a random-effect model to estimate the effect size of stunning on the initial and ultimate pH (pH1, pHu); drip loss (DL); colour (lightness—L*, redness—a*, yellowness—b*); and tenderness (expressed as Warner–Bratzler shear force, WBSF) of pork. In overall, loins from ES showed significantly lower pH1 (by 0.08 units); greater DL (by 0.68 p.p.); higher L* (by 1.29 units); and a* (by 0.80 units) as they compared to those from CO2 stunning. In subgroups, a greater-than-overall negative change in pH1, pHu, DL, L* and a* was detected with the application of the head-to-back (HB) stunning method. Additionally, alterations in DL and L* may be magnified with the application of conventional chilling (Conv.) to ES pigs. There was no effect of stunning on WBSF but, due to a low number of research in the database, the reliability of these results may be misleading. These results provide evidence that the differences between these two stunning methods in DL and L* may be diminished by the application of the head-only (HO) or head-to-body (HBO) method, followed by the fast chilling of carcasses.

Action of high concentration of carbon dioxide on size and ripening of tomato fruit

Elevated carbon dioxide concentration (eCO2) has the potential to modify tomato fruit size. However, the role of eCO2 on the rate of fruit growth and the time of fruit ripening remains elusive. Here, we report that the decrease in number of cell per area in the pericarp of mature fruits was associated with a significant enhancement in cell area, which in turn increased fruit yield and concentration of minerals. Moreover, the maximal fruit expansion rate was increased by eCO2 conditions, which was associated with enhanced of transcripts encoding expansin proteins in pericarp tissues of immature fruits. However, the duration of fruit expansion was not affected by eCO2, suggesting that fruit expansion rate is more flexible than expansion duration upon eCO2 treatment. High CO2 increased concentrations of ethylene and carotenoids during fruit ripening, which resulted in a slight acceleration of maturation. Thus, our study highlights the potential role of eCO2 in determining tomato fruit size and ripening.

The Endogenous Metabolic Response of Tribolium castaneum under a High Concentration of CO2

High carbon dioxide concentrations can effectively control most storage pests. To estimate the toxicity effect of high concentrations of CO2, four different concentrations of CO2 (25% CO2, 50% CO2, 75% CO2, and 95% CO2) were used to treat Tribolium castaneum, and the biochemical (carbohydrate content and gene expression level) and physiological (mortality, pupation, eclosion rate, and weight) features of insects submitted to different treatments with CO2 were evaluated. The T. castaneum mortality rate was 50% in approximately 2 days when exposed to a treatment with 95% CO2. When the CO2 concentration exceeded 75%, the pupation rate and eclosion rate of T. castaneum seriously declined. Higher than 25% CO2 concentrations resulted in a lower weight and shrunken body size of T. castaneum. It was further found that different CO2 concentration treatments all influenced the levels of the three carbohydrate contents in T. castaneum. In addition, according to the detection of trehalose metabolism pathway-related genes, T. castaneum mainly responds to stress factors via high expression of TPS, TRE1-2, and TRE1-3. Our results enrich the evaluation of the toxicity effect of CO2 treatment on grain storage pests, providing a basis for further improving the method of regulating grain storage to control insect pests.

Effects of different concentrations of CO2 on Scenedesmus obliquus to overcome sludge extract toxicity and accumulate biomass

Large amounts of toxic excess sludge as well as high concentrations of carbon dioxide can be produced in coal-gasification industry. Microalgae has huge potential in the use of nutrients, the removal of toxic organic matter in excess sludge and CO2 fixation. At the same time, the cultivation of the microalgae and the accumulation of high-quality biomass are also the key problems of concern. In this study, the growth and biomass synthesis of Scenedesmus obliquus cultured in sludge extract under 0%–15% (v/v) CO2 were investigated. Results indicated that the highest microalgae biomass yield of 1.609 ± 0.012 g/L can be achieved under 15% CO2 on the 30th day. The maximal photochemical efficiency of PSⅡ (Fv/Fm) decreased in the first 12 h and then increased with the culture time, and the decline amplitude decreased with the increase of the CO2 concentration, indicating that CO2 slowed down the toxic inhibition of sludge extract to Scenedesmus obliquus, which was expressed as the down-regulation of p53 signaling pathway and protein A0A383WFI7. Proteomic analysis showed that under high-concentration CO2, the protein interaction network with the protein of photosystem II assembly (A0A383VSL5) as the core protein regulated the growth of Scenedesmus obliquus in terms of energy metabolism and material transportation. On the 4th day, Methyltransf_11 domain-containing protein (A0A383VH03) was up-regulated and promoted lipid synthesis, leading to the accumulation of lipids in Scenedesmus obliquus in the early stage and the increase of polysaccharides in the later stage. Collectively, this study revealed the regulation mechanism of CO2 on toxicity removal and carbon distribution of Scenedesmus obliquus.

Effect of a low oxygen and high carbon dioxide modified atmosphere on the mortality of different life stages of Carpophilus hemipterus

• Modified atmosphere (2.1% O 2 with 90% CO 2 ) was evaluated in terms of efficacy at 20 °C. • Different life stages of Carpophilus hemipterus were exposed to MA for 48–120 h. • LT 95 values are 221 h, 82 h and 65 h for egg, larva and adult, respectively. • Based on LT 95 values, tolerance order was found as eggs > larvae > adults. Carpophilus hemipterus is an important cosmopolitan pest species that causes high economic losses in fruits before and after harvest. In this study, 0–2 d old eggs, 12 d old mature larvae and 1 week old adults of C. hemipterus were exposed to a modified atmosphere with low oxygen and high carbon dioxide content (2.1% O 2 + 90% CO 2 + 7.9% N 2 ) for 48–120 h at 20 °C and 75 ± 5% relative humidity. Time-mortality responses were subjected to probit analysis, and the difference between lethal exposure times (LTs) for the different life stages were compared using a lethal dose ratio test. LT 95 values were recorded as 221.83 h, 82.79 h and 65.31 h for egg, larval and adult stages, respectively. The statistical difference between LT 95 values was significant and egg stage was found to be more tolerant than the other two life stages. In addition, the larvae were found to be more tolerant than adults. According to the results of this study, a long time was needed to control the eggs of C. hemipterus .

INTEGRATED COMPLETION STUDY FOR HPHT SOUR GAS WELL DEVELOPMENT IN CARBONATE RESERVOIR X

Recently, Indonesia will lead to gas deficits since the increase in domestic gas demand in 2040. The increasing need for energy sources and the decreasing available reserves have encouraged oil and gas companies to explore and manage marginal reservoirs such as sour gas environment to maintain the balance of energy supply and demand. The gap in gas supply-demand will decrease by 20% due to the supply of Natuna Gas Field, as the example of potential sour gas environment (Batubara, 2015). Thus, it is very relevant to develop this potential source immediately.
 Also, sour gas field approximately shares 40% of Indonesia’s total proven gas reserve with an estimated OGIP of around 222 TSCF, with 75% of gas recovery. Unfortunately, sour gas environment cannot be produced economically since the it has high carbon dioxide (CO2) and hydrogen sulfide (H2S) content, which are toxic and corrosive.
 The X sour reserves contain 32% carbon dioxide (CO2) and 7072 ppm H2S with fluid gravity of 42 API. This discretionary source of CO2 was recently brought into production from one well with depth of 8400 ft. The well was perforated in a limited interval of 7100 until 7700 ft. The harsh environment presented many challenges to completion design. Unique equipment and material selection were required.
 This study aims to determine the reservoir fluids and production performance also predict the corrosivity of CO2 dissolved in the natural gas. With the simulation and prediction, it can be obtained the proper material and equipment selection based on the sour service needed. As a result, the wet gas reservoir of X field can produce optimum rate of 19.1063 MMSCFD. For completion design, Nickel Alloy SM2535 or SM2242 is needed as there will be damage in form of corrosion and pitting.

Time-dependent Seismic Fragility for Aging RC Frame Structures in the Inland Atmosphere Environment

ABSTRACT For inland cities with high concentration of carbon dioxide in the air, the seismic performance of RC structures deteriorates over time. In this study, a previously developed concrete carbonation and corrosion model was introduced to the framework of seismic fragility analysis to investigate the effects of environmental factors on the seismic performance of RC structures, considering carbon dioxide, humidity, and temperature. An approach to quantify the effects of these environmental effects on the time-dependent fragility of deteriorated RC buildings in the inland atmosphere environment was proposed. A four-story three-bay RC structure was analysed as a case study. Pushover analysis was performed to identify the damage limits of the structure as a function of the exposure time (0, 25, 50, 75 and 100 years). Fragility curves of the structure at different exposure times were developed based on the time-dependent seismic demands and predefined limit states. The results show that the structure deteriorates when exceeding the design life of durability. In general, the damage to the deteriorated structure increases with time and intensity of ground motions. In particular, the margin between severe damage and collapse decreases significantly over time. This means that aging structures are likely to collapse suddenly after severe damage occurs. Therefore, the time-dependent seismic performance of the aging structures in the inland cities should be carefully considered.

Recent Advances in Catalysis for Methanation of CO2 from Biogas

Biogas, with its high carbon dioxide content (30–50 vol%), is an attractive feed for catalytic methanation with green hydrogen, and is suitable for establishing a closed carbon cycle with methane as energy carrier. The most important questions for direct biogas methanation are how the high methane content influences the methanation reaction and overall efficiency on one hand, and to what extent the methanation catalysts can be made more resistant to various sulfur-containing compounds in biogas on the other hand. Ni-based catalysts are the most favored for economic reasons. The interplay of active compounds, supports, and promoters is discussed regarding the potential for improving sulfur resistance. Several strategies are addressed and experimental studies are evaluated, to identify catalysts which might be suitable for these challenges. As several catalyst functionalities must be combined, materials with two active metals and binary oxide support seem to be the best approach to technically applicable solutions. The high methane content in biogas appears to have a measurable impact on equilibrium and therefore CO2 conversion. Depending on the initial CH4/CO2 ratio, this might lead to a product with higher methane content, and, after work-up, to a drop in-option for existing natural gas grids.

Fluid phase equilibria in asymmetric model systems. Part I: CO2+ diphenylmethane

Asymmetric reservoir fluids with high gas-to-oil ratios and heavy oils could present complex phase behaviors at reservoir or production conditions, as observed in Brazilian Pre-Salt reservoirs. To better understand the phase behaviors of these types of reservoir fluids with high carbon dioxide and methane contents, we initiated a study in our laboratory on the fluid phase equilibria of systems containing supercritical CO2 and/or methane plus a heavy hydrocarbon. In the initial phase of this program, which forms this article, the choice was made to experimentally determine the phase diagram of the binary system: carbon dioxide + diphenylmethane within the temperature range 293.15–378.15 K. In addition, the data were compared with those modeled using a predictive version of the Peng-Robinson equation of state (PPR78).

Development of a dielectric corona pre-ionized TEA CO2 laser with CO2-rich gas mixture suitable for second harmonic generation

A simple dielectric corona pre-ionized TEA CO2 laser, which is suitable for SHG applications, has been developed with the help of high concentration of carbon dioxide. The intense, very uniform UV pre-ionization and low-inductance discharge circuit permit the best laser performance with a gas mixture rich in CO2. In order to achieve the most acceptable combination of the peak power, output energy and pulse duration, not only N2:CO2 ratio varies in favor of CO2 but also helium concentration is significantly reduced. When CO2 concentration varied from 20 to 53% in the experiment, a more symmetrical, shorter output pulse (a FWHM of ∼60 ns) with a significantly lower tail and a lower energy (∼700 mJ) was obtained with a rich gas mixture of CO2:N2:He = 10:1:8 than a lean gas mixture of 1:1:3 while the peak output power was virtually kept constant (∼5.8 MW). The effect of the laser gas mixture on optimizing the energy and time parameters of SH waveform has been studied numerically. The calculations show that for the rich gas mixture the residual tail of the SH pulse is completely eliminated by the nonlinear conversion and the corresponding waveform has a lower total duration (∼600 ns). Moreover, the energy conversion efficiency can be increased by 29% with the rich mixture compared to the lean mixture.

Editorial: Special Issue on Advancements and Lessons Learned during Phases I and II of the DARPA Subterranean Challenge

Complex underground environments such as tunnels, underground urban settings, and natural caves present significant challenges for first responders in the event of an emergency. Each of these subdomains has unique hazards while sharing some common elements. Apart from challenging terrain features and aspects such as smoke and dust, communications in these environments are often severely degraded as well. Motivated by these difficulties, the Defense Advanced Research Projects Agency (DARPA) Subterranean Challenge (SubT) was set up to drive the global robotics community to develop novel approaches to rapidly map, navigate, and search underground environments under time pressure. The DARPA SubT,1 conducted from April 2019 to September 2021, was organized as two competition tracks. In the systems track, teams developed and demonstrated physical systems and competed live in real subterranean environments representative of the three subdomains. In the virtual track, teams developed software and algorithms using virtual models of systems and environments to compete in simulation-based events representative of the three subdomains. Phase I and Phase II of the systems track of this challenge consisted of the following events: 1. SubT Integration Exercise (STIX) at the Edgar Experimental Mine in Idaho Springs, Colorado, USA, in April 2019. 2. Tunnel Circuit event at the National Institute for Occupational Safety and Health (NIOSH) mine in Pittsburgh, Pennsylvania, USA, in August 2019. 3. Urban Circuit event at the Satsop Nuclear power plant in Elma, Washington, USA, in February 2020. The Cave Circuit event scheduled for August 2020 was canceled by DARPA due to the COVID-19 pandemic. As a result, a number of the competing teams held their local Cave events to evaluate their system performance in natural cave environments. In each of these events, the task was to deploy a fleet of robots into the subterranean course to locate and identify a set of predefined artifacts within the 60-minute run time. These artifacts included cell phones, backpacks, power drills, fire extinguishers, survivors (thermal mannequins), air vents, rooms with high carbon dioxide concentration, climbing rope, and helmets. A point was scored for each correctly identified artifact located within a 5-meter accuracy. Only one human supervisor was allowed to control and communicate with the robots once the run started. A pit crew of 10 personnel was allowed to set up the robots in the staging area outside the course entrance in the 30-minute period immediately prior to the run.

Well - test analysis for wells with gas rich CO2 in carbonate reservoir Song Hong Basin

The evaluations of properties of carbonate reservoirs containing gas with very high carbon dioxide (CO2) content often face many difficulties. In fact, there is a significal difference in interpretation results compared to conventional gas well testing due to: there is a gas to liquid phase transition; noise, abnormal increase or decrease in pressure and temperature during flow period, etc. These abnormal behaviors are all directly related to the specificity of CO2 properties with high compressible than that of natural gas, which can vary greatly density and can reach supercritical liquid state, transitioning solid to liquid or liqid to gaseous states even when pressure and temperature changes within a small range. During the testing of gas wells with high CO2 content, the phenomenon of pressure drop while pressure buid-up often occurs, leading to the analysis of reservoir parameters according to the conventional pressure build-up analysis method usually not feasible. The content of the article is aimed at researching and applying the method of interpreting well test data in the drawdown period while multi-rate flowing to more accurately estimate reservoir properties and mitigate risks in the design of the field development plan to achieve the economic efficiency.

Atmospheric CO2 as a resource for renewable energy production: A European energy law appraisal of direct air capture fuels

AbstractThe high concentration of carbon dioxide (CO2) in the atmosphere is considered the root cause of climate change. However, in the future atmospheric CO2 could play a strategic role towards a renewable energy transition due to its use as a carbon source for the production of goods. Notably, direct air capture (DAC) technology, by removing CO2 from the atmosphere, could support and improve the carbon footprint of the transport and building sector, both of which are responsible for a large part of the world's greenhouse gas emissions. Once the CO2 is removed, it can be used to produce synthetic fuels for the transport sector, where there are few low‐carbon alternatives, such as aviation and shipping. In this article, we examine European Union legislation, focusing on the Renewable Energy Directive, and conclude that DAC fuels can be considered as renewable energy for the transport sector. Moreover, we highlight that the Directive does not yet regulate the methodology that defines the renewable character of DAC fuels and examine relevant criteria to be considered. In addition, because DAC can possibly be operated in buildings, we examine whether the Energy Performance of Buildings Directive is a legal instrument to be considered for deploying this technology.

Elevated CO2 exposure induces core browning in Yali pears by inhibiting the electron transport chain

Pears may be affected by core browning during storage, reducing their commercial value. The effect of CO2 stress on the core browning process in Yali pears was investigated. Exposure to a 4% CO2 atmosphere significantly increased the core browning and reduced titratable acidity and soluble solids content. The activity of succinate dehydrogenase and peroxidase was reduced in CO2-stressed pears, whereas the levels of H2O2 and malondialdehyde were increased. Transmission electron microscopy revealed significant damage to cellular membrane structure in the core tissues of CO2-stressed pears. In addition, CO2-stressed pears showed increased polyphenol oxidase activity. These results suggest that high concentrations of carbon dioxide can accelerate core browning in pears by inhibiting the activities of enzymes in the electron transport chain, resulting in increased levels of free radicals that damage cellular membranes.

Study on Phase Transition and Gas Deviation Coefficient of Natural Gas with High Carbon Dioxide Content

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Study on Phase Transition and Gas Deviation Coefficient of Natural Gas with High Carbon Dioxide Content

It is the basic research subject that analyzes and calculate the law and numerical value of phase change and gas deviation coefficient of natural gas with high-CO2 content in the process of safe and effective development of gas reservoirs, which is obtained by high-pressure physical properties PVT (Pressure-Volume-Temperature) experiments and different calculation methods calculations. Aiming at natural gas with high-CO2 content in the Dongfang gas field, the phase change characteristics and physical parameters of different PVT samples are simulated and tested by Chandler 3000-GL analyzer and PVT SIM software. The experimental data shows that the phase state of natural gas with different content of CO2 has not changed in the study range. At the same time, the deviation coefficient calculated by different calculation methods (DPR, DAK, BB, HY, Gopal) are compared with the experimental data, and the applicable scope of different calculation methods are obtained. The results show that the improved Gopal has high accuracy and is suitable for the calculation of the deviation coefficient of natural gas with high-CO2 content under high temperature and high pressure in the Dongfang gas field.

Evaluation of Catastrophic Global Warming due to Coal Combustion, Paradigm of South Asia

Coal is a carbon containing non-renewable fossil fuel and one of the major contributors of climate change and global warming. We used TANSO FTS instrument in order to obtain the level of atmospheric carbon dioxide through datasets obtained from GOSAT satellite. GIOVANNI was also used to obtain atmospheric concentration of various gases. Burning of coal causes emission of greenhouse gases (GHG) and black carbon (BC) in atmosphere which are responsible for nearly 0.3°C of 1°C rise in temperature. The annual average value of carbon emission for the year 2010 and 2019 is 388.4 ppm and 409 ppm respectively. Since the pre-industrial times CO2 concentrations have increased up to100 PPM (36%) in the last two and a half centuries (250 years).In South Asia Dhaka has the worst quality of air as CO2 concentration (6.7%) is higher than the country’s GDP (5.25%) and energy consumption (4.77%). While an increasing trend GHG has been observed in Lahore up to 5.5 %. This study concludes that the high concentration of carbon dioxide in atmosphere is responsible for average rise of 1.2 °C temperature annually. This temperature rise can lead to adverse climatic conditions i.e., melting of glaciers which will consequently rise the sea level various landmasses may disappear by 2050.

INFLUENCE OF DIFFERENT DOSES OF SEWAGE SLUDGE ON THE MORPHOLOGICAL-PHENOLOGICAL FEATURES OF AMARANTH (AMARANTHUS CRUENTUS)

Due to the fact that amaranth belongs to type C4 plants, the process of photosynthesis of amaranth differs from other plants. It absorbs carbon dioxide more actively than C3 plants and effectively enriches the air with oxygen. In this regard, decorative amaranth varieties should be used as a natural filter in urban environments with a high carbon dioxide content. In addition, decorative amaranth varieties have a unique leaf and flower shape. The color of amaranth can be yellow, red, green, crimson, three colors; the shape of the leaves is oval, curly; inflorescences are also distinguished by their varied beauty. Soil fertility, temperature and humidity are great importance for the normal development for any plant. In the absence of one of the above factors, the quality of life of the plant will decrease. Lack of nutrients in the soil, unfavorable weather, l ack of moisture leads to inhibition of photosynthesis in plants, a decrease in biomass, and decrease disease resistance. During our research, the sludge of municipal wastewater was used as fertilizer. Slud ge accumulates on landfills as waste, giving off an unpleasant odor and negatively affecting the environment. However, this hazardous waste can be recycled and obtained organic fertilizers for urban landscaping or soil reclamation of disturbed lands. The results of the study showed that 10 t / ha of sewage sludge is the most positive impact on the growth of amaranth, the increase in total biomass, stem length and flower were noted . At this length of the stem of the plant increased by 77%, the length of the inflorescence - in 2.2 times, the mass of inflorescences - in 1.8 times, the biomass of the plant before flowering - in 2.1 times compared to the control.