Based on the static composting process of the municipal sewage sludge (MSS), the paper demonstrates the dynamic composting process of the MSS from Shanghai Quyang Municipal Wastewater Treatment Plant. The dynamics of different operational and evaluating indices during the treatment process are discussed, such as water content, temperature, pH
Dec 22, 2020 · Conventional fertilization practices in agroecosystems concern the supply of bioavailable nutrients, such as mineral fertilizers. A consolidated alternative to restoring the long-term fertility of agricultural soils is their amendment with organic fertilizers. Soil amendment with biowaste compost or sewage sludge represents a sustainable strategy to avoid the landfilling of organic matter
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
Sep 1, 2021 · Surprisingly, HPC was more efficient at sludge degradation and phytotoxicity removal, further, the end sludge compost of HPC achieved 123.3% increase of the humification degree (HAC/FAC) and 14.2
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.
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
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
Jan 14, 2021 · In present study, the effects of carbon sources on compost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were performed for
Oct 27, 2015 · In order to use sewage sludge (SS) composts in agriculture, it is extremely important to estimate the quality of compost products. The aim of this study was to investigate the quality of composted SS as a fertilizer and soil amendment especially in semi-arid areas. To determine the quality and agronomic value of the SS compost products, analyses on pH, electrical conductivity, organic matter
Jul 1, 2017 · Nevertheless, as described by several authors (Quan-Ying et al., 2007, Smith, 2009), the high metal content of sewage sludge is a disadvantage for both anaerobic digestion and composting. Moreover, due to the high moisture content and low porosity of this waste, bulking agents must be used during composting to absorb moisture, enhance aeration
Mar 1, 2014 · The results were as follows: 81.5 kg CO2-eq./ton for windrow composting; −46.0 kg CO2-eq./ton for a high solids anaerobic digester; −156 kg CO2-eq./ton for co-digestion with industrial waste
Sludge dewatering separates sludge into liquids and solids, minimizing the volume of waste and making it easier and more cost effective for final disposal. Sludge is a semi-solid slurry that is produced from various industrial and municipal water treatment processes. Dewatering sludge with sludge dewatering equipment can significantly reduce
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.
Apr 1, 2019 · Thus, a well-operated sewage sludge composting plant can better reduce the generation of VOCs than facilities lacking good operating conditions (Saldarriaga et al., 2014). The total amount of VOCs was 142.2 ± 86.8–2595.7 ± 1367.3 μg.m −3 in the entire composting process, and the sum of the individual VOC species was calculated from the
Sep 1, 2018 · The sewage sludge was purchased from a sewage treatment plant of a food processing industry. The cigarettes were removed from the boxes and crushed in an organic waste disposer. Filters and paper were separated from the tobacco in sieves (6.0 mm × 6.0 mm holes) and the particle size of tobacco waste it was around 2.0 mm.