Jan 1, 2022 · The activated sludge in the A 2 O unit of a full-scale wastewater treatment plant (WWTP) in Zhejiang, China was used as the inocula for the lab-scale A 2 O system. Influent of the full-scale WWTP was 50,000 m 3 /d, composing of 55% municipal wastewater and 45% industrial wastewater with an average COD of 332 mg/L and TN of 33.2 mg/L.
Aug 13, 2022 · Abstract The fermentative valeric acid production is a carbon-neutral method for the disposal of waste sludge in municipal wastewater treatment plants. To overcome the bottlenecks of energy-consuming and slow hydrolysis and acidification during the fermentation process, riboflavin was supplemented to enhance the biological redox reaction. The effect of pH (3, 5, 7, 9, 11) on the production of
Oct 23, 2023 · Liu et al. 19 successfully coupled the sludge anaerobic fermentation unit with the sewage treatment system in an urban sewage treatment plant, achieving a sludge reduction rate of 54.19%, and
Dec 1, 2023 · In the study on the impact of total solid (TS) of sewage sludge on MCFAs production, Wang et al. found that with TS rising from 2 % to 8 %, the highest SCFAs concentration of sewage sludge fermentation was promoted to 10.16 g/L, and n-caproic acid production reached 43.45 mmol/L in the subsequent CE process [10].
Nov 5, 2010 · Wastewater biological nutrient removal (BNR) by short-cut nitrification-denitrification (SCND) and denitrifying phosphorus removal via nitrite (DPRN) has several advantages, such as organic carbon source saving. In this paper, a new method, i.e., by using waste activated sludge alkaline fermentation liquid as BNR carbon source, for
Jul 6, 2020 · Sewage sludge is a rich source of phosphorus. to enhanced biological phosphorus removal in full-scale wastewater treatment systems. ... aerobic granular sludge fermentation for releases of ...
Feed Rates. USA Sludge matches the feed-rate to the demand. This is best understood from the point-of-view of “Value-to Value”. In other words, we strive to seed a proper amount of Revive complex into the fermenting tank, and after a 24-hour period, begin releasing the solution into the waste stream, attempting to match the demand.
Feb 29, 2024 · Special Issue Information. Dear Colleagues, Wastewater treatment facilities in China must produce a significant amount of sewage sludge due to the country's rapid urbanization and the rise in urban wastewater. This sludge contains potential resources including organic materials, nutrients, metals, and bioenergy that can be recovered.
Jan 1, 2022 · Sewage sludge management is important for avoiding emissions and mitigating negative effects on the atmosphere, human health, and long-term development. Cities generate hundreds of tons of waste annually, the bulk of which is sewage sludge, as the global population expands, and urbanization occurs. In lower-middle-income nations and low-income
Oct 15, 2023 · Considering the phosphorus and organics pollution in wastewater, sewage sludge and other waste biomass, the EF system equipped with Fe anode may achieve the synchronous hydrogen generation, phosphorus remove and vivianite recovery. Using Fe anode is more economical than that with ferrous iron or ferric iron as flocculating agents [17].
What Are the Principal Feedstocks Used for On-site Sludge Fermentation at WWTPs? Primary sludge, mixed liquor, and return activated sludge are commonly used in fermenters to produce VFAs.
Feb 1, 2024 · In this study, enzyme-enhanced fermentation was conducted to improve sludge solubilization from 283 to 7728 mg COD/L and to enhance volatile fatty acids (VFAs) yield by 58.6 % as compared to the conventional fermentation.
Feb 19, 2021 · Being rich in readily biodegradable carbohydrates and high C/N ratio of 10–30, algal biomass can be a good carbon source for sludge co-fermentation. However, co-fermentation of sewage sludge and algae for hydrogen production has never been reported before. In co-fermentation systems, hydrogen production is affected by various factors [13, 23].
Jul 17, 2010 · An anaerobic hydrogen fermentation system with a thermophilic flow-through reactor (55°C) for hydrogen production and a boiling retention vessel (100°C) for continuous heat treatment, was studied for enhanced continuous hydrogen fermentation using sewage sludge. The performance of the hydrogen fermentation system was tested at various Hydraulic Retention Times (HRTs) ranged from 1 to 5 days
Mar 1, 2012 · All sludge samples were prepared with 500 ml of the pre-treated sewage sludge supernatant and 20 ml of inoculum in a 1000-ml glass reactor for VFA fermentation. The pH values were adjusted to 12.0, 11.0, 9.0, 7.0, 5.0 and 3.0 every 12 h by using 6 M NaOH or 6 M HCl solutions, respectively.
