Jun 20, 2012 · In 2008, it is estimated that 57 billion tons of municipal wastewater was discharged in China, 58% of which came from municipal domestic sewage (Zhang et al. 2010), while the production of municipal wastewater and dewatered sewage in China increased approximately 5% per year on average from 1998 to 2009 as shown in Fig. 1. Sewage sludge as an
Aug 30, 2023 · The complete characterisation (moisture, pH, electrical conductivity, total, oxidisable and water-soluble organic carbon, humic substances, organic and mineral nitrogen, macronutrients, micronutrients, heavy metals) of starting materials, samples taken periodically and final composts were carried out.
The sludge is converted into sludge-derived biochar (SDBC), an environmentally functional material, that can not only alleviate the burden of sewage sludge disposal, but also can be used to remove pollutants and reduce the risk of heavy metals, organic microcontaminants and pathogens, is an eco-friendly technology (Qiu et al., 2020).
Apr 19, 2019 · The annual sludge production in EU-27 will grow from 11.5 million tons of dry solids (DS) in 2010 to 13 million tons DS in 2020 . Table 1 shows the more recent data considering the production and disposal of sewage sludge for selected countries, according to OECD. While legislation more or less compels European countries to improve their sewage
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
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
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
In Mediterranean areas, olive mill wastes pose a major environmental problem owing to their important production and their high polyphenolic compounds and organic acids concentrations. In this work, the evolution of polyphenolic compounds was studied during co-composting of olive mill wastewater slu
The sewage sludge composting pile was performed at industrial scale in the Biosolid Plant of “Biomasa del Guadalquivir”. This pile was located in Vegas del Genil, Granada (37.160791−3.723879) and it was built using a semipermeable film to cover the pile and a ventilator system, as previously described by Robledo-Mahón et al. [ 10 ].
Jul 1, 2017 · 1. Introduction. Due to the high volume of sewage sludge currently generated worldwide (8.9 million tons of dry solid matter in 2010 according to Eurostat, 2015), as well as its high concentration in heavy metals (especially cadmium), organic micropollutants and pathogens, this waste must be properly managed to prevent environmental problems and risks for human health (Hendrickx et al., 2009).
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
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
