Sludge is a by-product originating from wastewater and water treatment processes. There are three main categories of sludge: a. sludge originating from the treatment of urban wastewater, consisting of domestic wastewater or of the mixture of domestic wastewater with industrial wastewater and/or run-off rainwater; b.
Therefore, industrial-scale sewage sludge composting was shown to be an effective tool for the elimination of indicator strains of fecal contamination resistant to certain antibiotics in routine use. Thus, it contributed to the reduction of the spread of ARGs in environmental microbiomes, as well as the transfer of the same in the food chain.
Jan 1, 2022 · Abstract. Global demand of management of Sewage and sludge is increasing fast because of the ever-increasing population pressure as well as environmental constraints owing to deteriorate quality of the soil as well as ecosystem. Management of these waste can be effectively done so as to remove the various constituents of the polluting load
Jan 1, 2023 · The composting of sewage sludge is a valid method for its reuse, allowing a waste product, whose disposal is becoming difficult to manage, to be seen as a resource. This possibility of reuse is part of a “Circular Economy” vision and goes along with the new policies supported by the EU.
The results of plant-scale hyperthermophilic composting of municipal sludge with green waste showed that the residual concentrations of polyaromatic hydrocarbons, phthalates, polybrominated diphenyl ethers were <5 mg/kg and decreased over time, with the removal percentages from 12.1% to 51.2% during seven days of composting.
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
Nevertheless, sewage sludge, especially if it comes from domestic or industrial waste, contains pathogens, heavy metals, and organic toxic pollutants that limit its land applica‐ tion [28,29].
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
Nov 1, 2020 · Xinhui Xia a. , Hang Yu a. , Qingliang Zhao a. , Junqiu Jiang a. , Shunwen Bai a. Add to Mendeley. Share. https://doi.org/10.1016/j.envint.2020.106093 Get rights and content. Under a Creative Commons license. open access. Highlights. •. Sludge production in China in 2019 was 39.0 million tons, average 28.1 kg/y per capita. •.
Wastewater use can range from the formal use of ultrapure recycled water for ad-vanced industrial purposes to the informal use of untreated and raw wastewater for vegetable production in a peri-urban area. The diversity of cases is as large as the diversity of types of wastewater and sludge, types of reuse and types of users (Box 2.1 and 2.2).
Jan 1, 2015 · Sewage treatment plants also produce sludge, called sewage sludge, when suspended solids are removed from the wastewater and when soluble organic substances are converted to bacterial biomass which also become part of the sludge (Fig. 2.3).
Sep 1, 2023 · Settled sludge from sludge treatment ponds has also been used to ‘mix’ compost from solid waste, as shown in Accra, Ghana; farmers in Ghana, Mali, and Benin have been known to bribe septic truck drivers to deposit fecal matter in their fields [50]. The most critical aspect is the SS quality, as it will influence the stabilization procedure
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).
HotRot offers a system designed to process source separate food waste, with garden organics and other wood wastes added as needed. Solutions are available for a few hundred to 130,000 people, primarily utilising the HotRot 3518 or HotRot 1811. Turning dewatered biosolids into a useable fertiliser. Sludge or biosolids composting is usually done
Jan 14, 2021 · Yi Zhao & Li Chen. Scientific Reports 11, Article number: 1319 ( 2021 ) Cite this article. 3771 Accesses. 28 Citations. Metrics. In present study, the effects of carbon sources on compost process