Composting is widely used for recycling of urban sewage sludge to improve soil properties, which represents a potential pathway of spreading antibiotic resistant bacteria and genes to soils. However, the dynamics of antibiotic resistance genes (ARGs) and the underlying mechanisms during sewage sludge composting were not fully explored. Here, we used high-throughput quantitative PCR and 16S
Jan 1, 2019 · The dehydration of sewage sludge consists in lowering the water content of sediments and increasing the dry matter content. It is the key process for posttreatment and further processing of sewage sludge. During this process, the reduction of the volume of sewage sludge occurs simultaneously. The removal of water from sewage sludge is realized
Nov 1, 2022 · Electrochemical tests revealed enhanced corrosion resistance in SCPS with sludge extracts. ACE and ALE demonstrated higher corrosion inhibition efficiencies at 89.2% and 87.4%, attributed to synergistic effect of phosphate and organic ammonia nitrogen.
Apr 1, 2020 · Cui et al. (2020) investigated the effects of the atmospheric environment of composting plants on ARG abundance during sewage sludge composting using smTC and conventional thermophilic composting
Composting is an efficient way to convert organic waste into fertilizers. However, waste materials often contain large amounts of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) that can reduce the efficacy of antibiotic treatments when transmitted to humans. Because conventional composting often fails to remove these compounds, we evaluated if hyperthermophilic
Dec 24, 2021 · Moreover, antibiotic-resistant microorganisms present in the raw materials were reduced, since these were isolated only in the bio-oxidative phase. Therefore, industrial composting of sewage sludge results in a bio-safe final product suitable for use in a variety of applications.
Jan 1, 2012 · The dewatering of sludge is a mechanical unit operation used to reduce the moisture content of sludge for one or more of the following reasons []: (1) to reduce the transportation costs to drying and disposal sites, (2) to increase the calorific value of the sludge and thus makes it more suited for incineration, (3) to reduce leachate production at the landfill site upon landfilling, and (4
Sep 5, 2020 · However, whether particulate matter originating from the atmospheric environment of composting plants can impact ARG abundance during composting is unknown. Here, we investigated the effects of the atmospheric environment of composting plants on ARG abundance during sewage sludge composting using semi-permeable membrane-covered thermophilic
Jun 24, 2022 · Moreover, four bio-enhanced degradation scenarios of FQs were set up according to the different temperatures and carbon–nitrogen ratio (C/N) in the sewage sludge composting stage, and the molecular dynamic (MD) simulation assisted by protein–protein docking was used to screen the external environmental factors that promote the degradation
Jun 21, 2019 · Nutrient recovery from secondary resources, such as wastewater, has received increasing attention in recent years. Nutrient cycle sustainability and recycling approaches are important measures under development and considerations. This paper aims to present an overview of routes and technologies for nutrient recovery from sewage sludge and measures for improving their sustainability. First
Jun 24, 2022 · Moreover, four bio-enhanced degradation scenarios of FQs were set up according to the different temperatures and carbon-nitrogen ratio (C/N) in the sewage sludge composting stage, and the molecular dynamic (MD) simulation assisted by protein-protein docking was used to screen the external environmental factors that promote the degradation of
Aug 30, 2023 · Complementary characteristics of rice straw (RS) and sewage sludge (SS) create a suitable mixture to be used in a composting process. This work studies industrial-scale RS and SS composting to assess both its viability and optimization. Windrow composting was conducted during two seasons.
Results showed hyperthermophilic composting enhanced decomposition and humification of municipal sludge in the short terms, while heavy metal concentrations and speciation had no significant change with high copper and zinc levels (101-122 and 292-337 mg/kg, respectively) in compost samples.
Nov 1, 2019 · It is thus clear that bioleaching conditioning treatment (79.1%) is much more useful than either adding natural zeolite into composting piles or adjusting the C/N ratio of sewage sludge to reduce
Aug 17, 2021 · In this study, a comparative analysis is carried out of the compost produced from industrial composting facilities that process municipal solid waste (MSW) and sewage sludge (SS) and compare them with those produced from green waste (VR).