Aug 17, 2023 · We first revealed the behavior and biochemical mechanism of high iron attapulgite (HIAP) and different dosages affecting sewage sludge (SS) composting. HS/TOC ratio increased, but HA/TOC and HA/FA ratios reduced with the increase in HIAP dose. High-dose HIAP promoted the formation of more HS by weak catalytic effect but could bind more FA than HA by strong adsorption effect to inhibit the
Screw press sludge dewatering machine, also known as multi-disc dewatering machine, has the advantages of energy saving, stability and high degree of automation. It is widely used in municipal wastewater treatment projects and water treatment systems in the food, petroleum, pharmaceutical, chemical, paper, leather and other industries.
Dec 24, 2021 · Wastewater treatment generates a huge amount of sewage sludge, which is a source of environmental pollution. Among the alternatives for the management of this waste, industrial composting stands out as one of the most relevant. The objective of this study was to analyze the bacterial population link
Feb 2, 2018 · The objective of this study was to examine the feasibility of sewage sludge composting using a simple aeration method. Two consecutive composting trials (run A and run B) using Japanese sludge and woodchips (1:1, v/v) were conducted in cubic boxes (0.45 × 0.45 × 0.45 m3) made by plywood at Okayama University. Air was forced up through small holes perforated on two open-ended parallel PVC
The maturity of smuggled cigarette tobacco (SCT) and industrial sewage sludge (ISS) compost during composting in reactors was evaluated through physicochemical, phytotoxic and spectroscopic parameters. The temperatures reached peaks above 52 °C in the three reactors and were enough to achieve the stability of the compounds.
Jan 1, 2023 · Sewage sludge is treated in CMC 3 and CMC 5, which state that it is no longer possible to produce a fertilizer by aerobic composting (CMC 3) or by anaerobic digestion (CMC 5) from sewage sludge, industrial sludge or dredging sludge [33].
Apr 4, 2024 · The characterization of compost compositions on the basis of sewage sludge and structural materials (straw, sawdust, bark) composting is described. A comparison of the most often used for composting and characterization of structural materials is also presented. Sewage sludge and structural materials were mixed in different ratios and composted in piles (laboratory scale) for 3 months
Apr 6, 2024 · Sustainable management of sewage sludge is a challenge to the world. With a high content of organic material and essential nutrients, sewage sludge has been viewed as a cost-effective option for improving soil quality [1,2]. Its high concentration of organic matter and nutrients makes it logical to utilize sewage sludge as a fertilizer . Due to
Jan 1, 2022 · Sewage sludge (SS) is the solid, semi-solid, or liquid residue generated during the treatment of domestic sewage in wastewater treatment plants (WWTPs), whose correct destination is one of the biggest challenges for sanitation services globally (Zhen et al. 2017; Raheem et al. 2018) since the worldwide 7.6 billion people excreta must be disposed of in some way.
Several processes are used: air drying on sand beds. centrifugation. belt pressing (filtration) Increases solids content to 15 to 30%. Air drying reduces pathogens. Centrifugation and filtration result in some loss of nutrients. Anaerobic digestion. One of the most widely used for sludge treatment.
Sep 11, 2020 · The safe disposal of sewage sludge during the process of municipal wastewater treatment has become one of the major concerns of increased production. Land application was thought of as a more economical method for sewage sludge disposal than landfill and incineration. However, the presence of heavy metals in sewage sludge restricted the use of land application. The environmental risk of heavy
Jan 1, 2022 · PDF | On Jan 1, 2022, Hanxia Yu and others published High Nitrogen Addition after the Application of Sewage Sludge Compost Decreased the Bioavailability of Heavy Metals in Soil | Find, read and
Composting is controlled fermentation that converts organic matter aerobically and produces stable humic and pre-humic compounds (figure 1). Aeration will only be effective if the medium is air-permeable. Dewatered sludge often has a low porosity; a bulking agent has to be added, usually in the form of a carbonaceous support (20% of the mixture
Dec 7, 2022 · As increasing soil organic matter is considered one of the main strategies for reducing desertification in Europe, the production and use of high-quality composts has gained importance during the last decade. It is undisputed that the quantity and quality of humic substances (HS) and their fractions, i.e. fulvic acids (FA) and humic acids (HA) in compost are considered important indicators of
Aug 5, 2020 · The adoption of sewage sludge as an agricultural management strategy to improve soil properties and crop production is attracting great interest. Despite many positive effects on soil inorganic and organic components reported for different soil types, little information is available on sewage sludge application on Mediterranean soils, as well as on its use at different dose rates. The