قائمة الطعام
Compared to a nearby natural forest, the SOC content had dropped from 3.10% to 0.77%. Within 6 years of protection from litter removal, the organic C content recovered to 1.37% (Ding et al., 1992). This story is an example of how organic matter can be replenished by appropriate management measures, and how SOC reminds us about …
Plant-derived organic matter, such as dead roots and root exudates, which act as a C source for heterotrophic microbes, was reduced after understory removal. Without this ready source of C, microbial biomass, microbial N immobilization may be reduced, and consequently, a greater proportion of gross N mineralization may be …
In addition, plants contribute the majority of organic matter to dryland soils through above- and belowground litter as well as exudates from living plants (Aguilar and Sala, 1999). …
The importance of soil organic matter. Organic matter existing on the soil surface as raw plant residues helps protect the soil from the effect of rainfall, wind and sun. Removal, incorporation or burning of residues exposes the soil to negative climatic impacts, and removal or burning deprives the soil organisms of their primary energy source.
This study aimed to investigate the performance of three full-scale long-time water treatment plants with influent from Taihu Lake for the removal of natural organic …
The best total organic carbon (TOC) removal was achieved by SCG biochar (50.7 %) and chemical oxygen demand removal (50.9 %) by zeolite. However, when accounting for leaching, which was significant in some organic media but expected to …
4.1 Comparing dry crushing and wet sieving on the basis of mechanical stability, organic carbon concentrations and bacterial diversity Depending on the isolation method, the tensile strength and variability of soil fractions in the size range of microaggregates decreased in the order dry-crushed > wet-sieved free > wet-sieved …
3.2 Organic Matter Removal Efficiency and DOM Optical Index ... YL CWs-R relied on the submerged plant zone to remove multiple antibiotics and fluorescent components, but the organic matter secreted by aquatic plants weakened the removal effect of fluorescent components and sulfonamide antibiotics. The emergent plant zone …
Water treatment: used to remove organic matter, residual chlorine, odor, and heavy metals in water, purifying drinking water, industrial water, and sewage. Air purification: used to remove harmful gases, volatile organic compounds, and odors from the air. Food & beverage industry: for the removal of color, odor, and harmful substances.
1. Introduction. Dissolved organic matter (DOM) plays a critical role in aquatic ecosystems (Fellman et al., 2010) because DOM is a major energy source for bacteria (Falkowski et al., 2000) and directly affects the ability of bacteria to decompose organic matter in aquatic ecosystems (Muscarella et al., 2019).Therefore, revealing the …
The main objectives of this research were to establish a PADB with autotrophic denitrifiers enriched from anaerobic sludge, and investigate the simultaneous removal of NO 3 − and PO 4 3− from wastewater lacking organic matter and the mechanisms of NO 3 − and PO 4 3− removals. A multi-disciplinary approach, based on …
2. The role of PAC suspended in a feed in the PAC/UF system is the adsorption of low molecular organic compounds, which cannot be removed by UF alone (e.g. phenols and low molecular HA fractions). 3. The backwashing process applied in combined PAC/UF system was especially effective when PAC dosage was <20 mg PAC …
In the present study, an up-flow solid-phase denitrification biofilm reactor (US-DBR) was established for simultaneous nitrate and dissolved organic matter (DOM) removal from wastewater treatment plant effluent. After 100 days operation, the nitrate and COD removal efficiencies were high of 97% and 80%, respectively.
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The extensive removal of organic matter and ammoniacal-nitrogen achieved in this study is a result of the tidal flow operation that allowed maximum wastewater-biofilm contact and enhanced the transfer of oxygen by drawing air from the atmosphere into the wetland matrices. 4.2. The rate of organic matter removal
1. Introduction. Untreated water contains a complex mix of both natural and synthetic organic and inorganic compounds. Naturally occurring organic matter (NOM) is autogenic and originates from biological, geological, and hydrological activities such as pathogenic organism, detritus litter and photosynthetic eukaryotic organisms [181], …
The ranking of the three kinds of ponds in organic compounds removal efficiency is: water hyacinth pond> facultative pond> alga/duckweed pond; for nitrogen removal efficiency: hyacinth pond> alga ...
1. Introduction. Municipal wastewater treatment plant (WWTP) effluent, containing organic and inorganic matters, has caused critical problems when discharged into the ecosystem, such as eutrophication, water quality deterioration and other potential hazards to human (Hofman-Caris et al., 2017).As one of the most important pollutants in …
The aim of this research was to evaluate the kinetics of organic matter removal in CWs using two models: (i) the conventional first order model and (ii) the sigmoidal or k-n model. For this purpose, data …
We tested and compared different levels of pre–treatment: no pre–treatment, thermal combustion (300, 350, 400, 450, 500 and 550 °C) and chemical oxidation (H 2 O 2 and Na 2 S 2 O 8) using a …
Wet sieving versus dry crushing: Soil microaggregates reveal different physical structure, bacterial diversity and organic matter composition in a clay gradient June 2020 European Journal of Soil ...
1. Introduction. Cyanobacterial blooms are among the most burdensome concerns for drinking water treatment plants (DWTPs) (Huisman et al., 2018).Small, negatively charged and gas-vacuolated algal cells are practically recalcitrant to conventional coagulation and are capable of blocking filters/membranes during drinking water …
The elimination of organic materials by clarification is impacted by many factors such as the coagulation conditions, the characteristics of natural organic matter (NOM), the nature and concentrations of inorganic compounds, and the design and operation of the treament plant. Consequently, the removal of organic matter by …
In most water treatment plants pre-ozonation is predicted to have an adverse effect on physical removal of organic matter at ozone doses above about 0.7 mg O3/mg TOC, while enhanced removal may ...
Abstract. Organic matter removal and reduced soil aeration porosity during logging are important factors influencing the sustained productivity of managed forest ecosystems. …
Understanding the role of organic matter in maintaining a healthy soil is essential for developing ecologically sound agricultural practices. But how can organic …
Study with Quizlet and memorize flashcards containing terms like The carbon cycle describes how the element carbon moves through the Earth System. During the process known as ___, plants remove carbon dioxide from the atmosphere and create organic matter. Eventually, most of the organic matter will undergo ___, releasing carbon …
Removal percentages for the wastewater organic matter at each stage of the treatment plants were successfully obtained by monitoring the main fluorescence peaks: protein-like peaks (tryptophan-like peaks T1, T2 and tyrosine-like peaks B1, B2), humic-like peaks (fulvic-like peak A and humic-like peak C) and microbially-derived peak M.
CWs are low-cost and eco-friendly technology for wastewater treatment which can address some of the inorganic/organic pollutants, metals, pathogens, …
Changes in the characteristics, removal efficiency, and toxicity of pharmaceutical effluent organic matter (EfOM) after catalytic ozonation were investigated in this study. After a 90-min ...
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