The sustainable management of sewage sludge from municipal wastewater treatment facilities remains a global issue, and, despite numerous technologies being introduced, it is not yet fully resolved. Based on published estimates and interpolation of missing data, the annual production of this sludge in EU-28 countries was estimated at 9.0 to 9.5
2022/7/1/ · 1. Introduction. The approach of the circular economy is based on the reuse of the produced waste to give them a second life and thus recover bioproducts with high added value (Battista et al., 2020).Organic food waste, as well as the sewage sludge produced from domestic wastewater treatment plants (WWTPs) are the two biggest
2008/8/1/ · The fractionation of organic carbon (g/kg) of primary sludge, pig slurry, and sludge and slurry mixture. at a ratio 1:1 before fermentation (A) and after fermentation (B) in a mixture with sandy
2020/7/12/ · Anaerobic sludge stabilization is a commonly used technology. Most fermenters are operated at a mesophilic temperature regime. Modern trends in waste management aim to minimize waste generation. One of the strategies can be achieved by anaerobically stabilizing the sludge by raising the temperature. Higher temperatures will
2018/9/1/ · 1. Introduction. Large amount of sludge has been produced from wastewater treatment plants (WWTPs) in the world and direct discharge of the sludge may raise environmental concerns (Yang et al., 2015).Due to its high organic content (such as carbohydrate and protein), anaerobic digestion is recommended as an effective method
2024/3/26/ · Sewage sludge is the largest by-product of used water treatment. Its production is dependent upon influent characteristics and the processes applied. It is composed of a complex, heterogeneous mixture of microorganisms and readily biodegradable organic and inorganic materials. Sludge treatment is a highly complex,
2019/11/1/ · 1. Introduction. The treatment of sewage sludge (SS) has remained a thorny issue until now. Because of its high organic matter content, anaerobic digestion (AD) is widely used for SS treatment and can produce volatile fatty acids (VFAs) or methane (Appels et al., 2008; Chen et al., 2007).VFAs can act as superior carbon sources for
Anaerobic digestion is a process in which microorganisms convert organic matter into biogas in the absence of oxygen. Anaerobic treatment is typically utilized to treat warm, high-strength industrial wastewater containing high concentrations of biodegradable organic matter. This energy-efficient process reliably removes biochemical oxygen
2024/5/1/ · 2.2. Semi-continuous operation of AnDMBR for sludge anaerobic fermentation. A schematic diagram and the operational mode of the AnDMBR and the properties of the DM are provided in the Supplementary Material.In stage 1, the sludge anaerobic fermenter was operated without DM, and 600 mL of pretreated sludge
2009/9/16/ · Primary Influent. Clarifier. Effluent to Bioreactor. Fermented Sludge to solids handling Sludge Recycle. PSD recycle to 1) inoculate Inf., 2) provide longer SRT than HRT, 3) elutriate VFAs formed. Typical SRT = 2 to 3 days. SRT control by adjusting sludge wasting. Sludge blanket monitoring required for determine solids inventory and solids in
2023/9/1/ · Based on our results, we recommend a volumetric ratio of 8:2 for kitchen wastewater and excess sludge (R4). 3.1.2. Variation of soluble carbohydrate concentration. The production and composition of SCFAs are closely linked to the hydrolysis of fermentation substrates during anaerobic co-fermentation of kitchen wastewater and
2024/4/30/ · The relevant studies will provide new sights into sludge fermentation and guidance for sludge disposal. We are inviting research papers and reviews about novel insights on sludge fermentation. The aim of this Special Issue is to provide an insight into the latest findings of sludge fermentation, including the biologically volatile fatty acids
2020/1/1/ · The disposal cost of sewage sludge usually accounts for around 50% of the total operational cost in WWTPs (Appels et al., 2008).With the vast amount of the generated sludge from WWTPs, which also contains a substantial quantity of organic matter, therefore, much attention has been focused on the reuse and recycling of the valuable
Solid organic wastes were codigested together with sludge of a sewage treatment plant (STP). In the practical part of the study, a plant to pretreat the organic solid wastes provided by local super markets was constructed at the STP of Frutigen, Switzerland. Up to more than 1 cubic metre of wastes was added to the fermenter of the STP every day
2024/2/1/ · The primary characteristics of the raw sludge were determined (Table 1). Experimental procedure. The effect of different THP time on sludge anaerobic fermentation was operated in five reactors (i.e., identical glass). The total volume of each reactor was approximately 0.5 L. Firstly, 0.4 L of the same sludge were injected into