Mar 1, 2021 · In fact, the total number of bacteria in THP was reduced under the influence of high temperature. Similarly, the hydrolases secreted from these functional bacteria also decreased relatively. However, the EEM-FL analysis and enzyme activity results showed that the humification degree of the composting piles achieved highest at the THP.
Apr 1, 2019 · Among them, composting is the most ideal because sewage sludge contains large amounts of organic matter, nitrogen, and other mineral elements (Villasenor et al., 2011) and composting can convert sewage sludge into a safe and stable product for agriculture and horticulture (Lim et al., 2016; Wei et al., 2017), which has been documented for the
Sewage sludge is the residual, semi-solid material that is produced as a by-product during sewage treatment of industrial or municipal wastewater. The term "septage" also refers to sludge from simple wastewater treatment but is connected to simple on-site sanitation systems, such as septic tanks . When fresh sewage or wastewater enters a
Sep 1, 2022 · Improvement of sewage sludge composting derived from large municipal and industrial wastewater treatment plants is another key research to be further investigated. Modified pine wood as bulking agent has promising results on this bio-waste flow (Liu et al., 2021a).
Sep 15, 2023 · The aim of the study was to explore the molecular dynamics and transformation pathways of dissolved organic matter (DOM) in sewage sludge (SS) during composting, and the DOM of raw material, material experiencing thermophilic phase and material collected from humification phase were characterized using electrospray ionization coupled with Fourier transform ion cyclotron resonance mass
Jul 21, 2023 · As livestock and poultry farming expands in China, the generation of fecal waste has significantly increased. Inadequate waste management can contribute to environmental pollution. This study seeks to optimize small-scale composting systems to address the inefficiencies and the limited automation of traditional composting equipment. We redesigned the mixing blades and refined the ventilation
The aim of this study was to evaluate the laboratory-scale composting of sewage sludge and pumice mixtures that were amended with sucrose. The variation in temperature, pH, NH4 (+)-N, ammonia emission, bacterial community, ammonia assimilating bacteria (AAB) populations and enzymatic activity related to ammonia assimilation were detected.
Jul 15, 2022 · The amount of sewage sludge generated is closely related to the scale of the city . Meanwhile, the policy of the “zero waste” city and the high amount of sewage sludge generated provided an enormous opportunity for waste valorization. Sewage sludge recycling systems can substitute products and generate income by reducing GHG emissions . The
Mar 10, 2024 · Concentration of heavy metals in produced substrates (S01-S06 – large-scale composting location A; S07-S13 – large-scale composting location B; S13 – lab-scale composting; SC – control substrate). For exact numbers in all measured samples (including SS and precursors) see Table S3.
Large amounts of sewage sludge are generated in the process of sewage treatment. Sewage treatment and sewage sludge treatment and handling inevitably cause the problem of gas emissions and unpleasant smells. Degradation of organic matter results in the emissions of gases with an unpleasant smell (NH3, H2S, etc.), as well as greenhouse gases (CO2, CH4, N2O). The processes of biodegradation
Nov 16, 2016 · Compost with nutrient-rich organic matter can be produced from renewable biomass materials such as municipal sewage sludge, landscaping waste and others. In this study, co-composting of municipal sewage sludge and landscaping waste as a soil amendment using 10 m3 pilot scale bioreactor system was tested. The temperature, oxygen level, moisture content and pH were monitored throughout the
Jan 1, 2023 · Hrebeckova et al. [97] perform large-scale windrow system aged vermicomposting treat household biowaste 5.6 × 25.5 m, malt house sludge 6 × 10 m, grape marc 2.5 × 50 m, the highest enzyme activity observed in household biowaste vermicomposting included leucine aminopeptidase (154 mmol AMCL/g/h), chitinase (1681 mmol MUFN/g/h), alanine (160
Aug 21, 2020 · Bulking agents are particularly important for sewage sludge composting. In this study, reusable polypropylene packing (RPP) was mixed with sawdust to improve composting. The effect of the mix ratio of sawdust and RPP on the physicochemical characteristics, nitrogen transformation, and emissions of greenhouse gas (GHG) as well as differences in the germination index values was detected in a lab
Jan 1, 2011 · Composting experiments were carried out at the Lvgang Municipal Sewage Sludge Treatment Plant. The treatment scale for sewage sludge was 200 ton per day, and the process time for composting was 20 days. There were 20 fermentation compartments constructed from concrete. The composting mixture was loaded in the fermentation compartment.
The aim of this study was to assess the odor immission derived from full-scale composting of different abundant and highly pollutant organic waste: sewage sludge with bulking agent (SL), sewage sludge pretreated through anaerobic digestion and supplemented with bulking agent (SL-AD), and market wast