Tea powder waste as a potential co-substrate for enhancing the methane production in Anaerobic Digestion of carbon-rich organic waste

Anaerobic Codigestion of Alkali-Pretreated Prosopis juliflora Biomass with Sewage Sludge for Biomethane Production

“…The fresh sludge was obtained from the sewage treatment plant (STP), College of Engineering, Anna University, was rich in methanogenic bacteria, and was used for inoculum preparation. Methanogen-activated sewage sludge (MAS) was developed by addition of newly prepared micronutrients (g/L) such as (NH) 4 HPO 4 -0.2; CaCl 2 ·2H 2 O-0.1; NH 4 Cl-0.25; MgCl 2 ·6H 2 O-0.2; KCl-0.08; MnCl 2 ·4H 2 O-0.1; COCl 2 ·6H 2 O-0.05; H 3 BO 3 -0.05; CuCl 2 ·2H 2 O-0.04; NH 4 MoO 4 -0.01; ZnCl 2 -0.05; FeCl 2 ·4H 2 O-0.2; and Na 2 S·9H 2 O-0.05 to the obtained sludge . All of the reagents used were of analytical grade and procured from Merck.…”

“…Triplicates were maintained for the statistical implication of all of the reactors. The VS removal and VFA concentration were calculated using eqs and where VS r is the removal efficiency of volatile solids in the feedstock; VS initial is the initial concentration of volatile solids (g); VS final is the final concentration of VS (g); A is the volume of NaOH spent (mL), 40 is the molecular weight of NaOH, V is the volume of sample taken (mL), and DF is the dilution factor.…”

“…Methanogen-activated sewage sludge (MAS) was developed by addition of newly prepared micronutrients (g/L) such as (NH) 4 HPO 4 -0. 21 All of the reagents used were of analytical grade and procured from Merck. The pH of the AD system plays a substantial role in the metabolism and growth of microorganisms.…”

“…The largest byproduct of wastewater treatment plants is the sludge, and its disposal/reuse is the most challenging environmental problem in wastewater treatment processes . AD improves stabilization of the sewage sludge, and in the end, all easily accessible biomass has been degraded by microorganisms, which in turn lowers the biological activity . Furthermore, a reduction in the pathogen count and weed seeds present in the sludge was observed (Lukehurst et al, 2010).…”

“…20 AD improves stabilization of the sewage sludge, and in the end, all easily accessible biomass has been degraded by microorganisms, which in turn lowers the biological activity. 21 Furthermore, a reduction in the pathogen count and weed seeds present in the sludge was observed (Lukehurst et al, 2010). A significant decrease in the odor emission was observed once the sludge was stabilized, which is an advantage in the biomass utilization from agricultural sources.…”