scholarly journals Improvement of Methane Yield by Anaerobic Co-Digestion of Sewage and Petrochemical Wastewater: Effect of Temperature

2019 ◽  
Vol 31 (12) ◽  
pp. 2816-2820
Author(s):  
M.N.I. Siddique ◽  
M.F. Ahmad
Keyword(s):  
Sewage Sludge ◽  
Activated Sludge ◽  
Methane Production ◽  
Effect Of Temperature ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Waste Activated Sludge ◽  
Petrochemical Wastewater ◽  
Anaerobic Reactors ◽  
Volatile Solids

Anaerobic bio-digestibility of blend municipal sewage sludge (MSS), condensed waste activated sludge (CWAS) and petrochemical wastewater (PWW) has been evaluated utilizing semi-continuous operation, anaerobic reactors worked during mesophilic (37 ºC) and thermophilic (55 ºC) states. Supplementation of a significant PWW portion (49 % of VS) in an MSS + CWAS combination brought about 2.94 times more methane production, 153 versus 450 mL/g volatile solids (VS) under 37 ºC furthermore 2.59 times more methane production, 198 versus 513 mL/g VS under 55 ºC. The supplemented PWW portion might have been not inhibitory for the system. Those effects of this work show the profit from municipal sewage sludge, condensed waste activated sludge and petrochemical wastewater co-digestion.

scholarly journals Effect of micro-aerobic process on improvement of anaerobic digestion sewage sludge treatment: flow cytometry and ATP assessment

RSC Advances ◽  
2020 ◽  
Vol 10 (59) ◽  
pp. 35718-35728
Author(s):  
Reza Barati rashvanlou ◽  
Abbas Rezaee ◽  
Mahdi Farzadkia ◽  
Mitra Gholami ◽  
Majid Kermani
Keyword(s):  
Flow Cytometry ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Methane Production ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Sludge Treatment ◽  
Pretreatment Method ◽  
Aerobic Process ◽  
Sewage Sludge Treatment

Micro-aeration as a pretreatment method improves the efficiency of anaerobic digestion of municipal sewage sludge and consequently promotes the methane production.

scholarly journals Anaerobic Digestion for Biogas Production from Municipal Sewage Sludge: A Comparative Study between Fine Mesh Sieved Primary Sludge and Sedimented Primary Sludge

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3532
Author(s):  
Phillimon T Odirile ◽  
Potlako M Marumoloa ◽  
Anthoula Manali ◽  
Petros Gikas
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Biogas Production ◽  
Physicochemical Characteristics ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Anaerobic Sludge ◽  
Primary Sludge ◽  
Fine Mesh ◽  
Volatile Solids

Two different types of primary sewage sludge have been used as feedstock for production of biogas through anaerobic digestion (AD): the one type was sludge from a typical primary clarifier (PC), while the other type of sludge produced by a rotating belt filter, commonly called microsieve (MS). Initially the main physicochemical characteristics of the sludges, such as total solids (TS), volatile solids (VS), VS/TS, pH and carbon to nitrogen ratio (C/N) were determined, for MS: 37.86 ± 0.08%, 83.00 ± 0.41%, 0.83 ± 0.00, 6.67 ± 0.08 and 19.68 ± 0.69, respectively, and for PC: 2.61 ± 0.08%, 78.77 ± 1.91%, 0.79 ± 0.02, 6.61 ± 0.10 and 14.46 ± 1.23, respectively. Then, calculated amounts of the sludges were inserted into airtight vials and were inoculated using anaerobic sludge. The daily biogas production was measured over a period of 30 days. PC sludge maximized the daily biogas production (44.20 mlbiogas/gvsd) 11 days after inoculation, while the MS sludge reach a peak (37.74 mlbiogas/gvsd) 14 days after inoculation. The cumulative biogas production over the 30 days of AD was in the same laver (442.29 mlbiogas/gvs for PC versus 434.73 mlbiogas/gvs for MS). However, PC sludge indicated higher daily biogas production, compared to MS sludge, while the opposite was observed for the period following the peak point. The Volatile Solids Reduction for PC and MS sludges was recorded as 46.06% and 32.39%, respectively.

scholarly journals Effect of Zinc and Copper on Anaerobic Stabilization of Sewage Sludge

2018 ◽  
Vol 66 (2) ◽  
pp. 357-363 ◽  
Author(s):  
Tereza Dokulilová ◽  
Tomáš Koutný ◽  
Tomáš Vítěz
Keyword(s):  
Sewage Sludge ◽  
Methane Production ◽  
Anaerobic Fermentation ◽  
Biogas Production ◽  
Inhibitory Effect ◽  
Significant Inhibition ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Anaerobic Microorganisms ◽  
Sludge Stabilization

The most frequently found metals in municipal sewage sludge are copper and zinc. The aim of this study was to the evaluate effect of these metals on anaerobic microorganisms during sewage sludge stabilization. Anaerobic fermentation tests were carried out in 24 batch fermenters with hydraulic retention time 21 days at mesophilic temperature conditions 38 °C ± 0.2 °C. Five different concentrations of metal ionts (100-1000 mg∙l-1) were tested. Cumulative biogas and methane production were used as the comparative parameters of inhibition. Hypothesis, which predicted presence of inhibitory effect of zinc and copper on anaerobic microorganisms, mainly on methanogenic Archaea, was confirmed. The lowest concentration of zinc and copper which cause significant inhibition of biogas production was 400 mg Zn2+∙l-1 and 1000 mg Cu2+∙l-1, which cause reduction of 10.3 ± 2.0 % and 82.8 ± 1.1 %, respectively. The lowest concentration of zinc and copper which lead to significant inhibition of methane production is 400 mg Zn2+∙l-1 and 600 mg Cu2+∙l-1, which caused to reduction of 16.1 ± 3.2 % and 17.4 ± 2.2 %, respectively. The reduction in methane production is higher than in biogas production.

A long-term chemical and infrared spectroscopy study on a soil amended with municipal sewage sludge

Agronomie ◽  
2001 ◽  
Vol 21 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Giovanni Gigliotti ◽  
Pier Lodovico Giusquiani ◽  
Daniela Businelli
Keyword(s):  
Infrared Spectroscopy ◽  
Sewage Sludge ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Spectroscopy Study

Comparison of Aerobic and Anoxic-Aerobic Digestion of Waste Activated Sludge

1985 ◽  
Vol 17 (8) ◽  
pp. 1475-1478 ◽  
Author(s):  
A P. C. Warner ◽  
G. A. Ekama ◽  
G v. R. Marais
Keyword(s):  
Experimental Data ◽  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Activated Sludge Process ◽  
Cycle Times ◽  
Waste Sludge ◽  
Volatile Solids ◽  
In Series ◽  
Flow Through ◽  
Theoretical Simulations

The laboratory scale experimental investigation comprised a 6 day sludge age activated sludge process, the waste sludge of which was fed to a number of digesters operated as follows: single reactor flow through digesters at 4 or 6 days sludge age, under aerobic and anoxic-aerobic conditions (with 1,5 and 4 h cycle times) and 3-in-series flow through aerobic digesters each at 4 days sludge age; all digesters were fed draw-and-fill wise once per day. The general kinetic model for the aerobic activated sludge process set out by Dold et al., (1980) and extended to the anoxic-aerobic process by van Haandel et al., (1981) simulated accurately all the experimental data (Figs 1 to 4) without the need for adjusting the kinetic constants. Both theoretical simulations and experimental data indicate that (i) the rate of volatile solids destruction is not affected by the incorporation of anoxic cycles and (ii) the specific denitrification rate is independent of sludge age and is K4T = 0,046(l,029)(T-20) mgNO3-N/(mg active VSS. d) i.e. about 2/3 of that in the secondary anoxic of the single sludge activated sludge stystem. An important consequence of (i) and (ii) above is that denitrification can be integrated easily in the steady state digester model of Marais and Ekama (1976) and used for design (Warner et al., 1983).

scholarly journals Highly Effective Adsorption Process of Ni(II) Ions with the Use of Sewage Sludge Fly Ash Generated by Circulating Fluidized Bed Combustion (CFBC) Technology

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3106
Author(s):  
Tomasz Kalak ◽  
Kinga Marciszewicz ◽  
Joanna Piepiórka-Stepuk
Keyword(s):  
Fly Ash ◽  
Sewage Sludge ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Fluidized Bed Combustion ◽  
Nickel Ions ◽  
Suitable Material ◽  
Circulating Fluidized Bed Combustion

Recently, more and more attention has been paid to the removal of nickel ions due to their negative effects on the environment and human health. In this research, fly ash obtained as a result of incineration of municipal sewage sludge with the use of circulating fluidized bed combustion (CFBC) technology was used to analyze the possibility of removing Ni(II) ions in adsorption processes. The properties of the material were determined using analytical methods, such as SEM-EDS, XRD, BET, BJH, thermogravimetry, zeta potential, SEM, and FT-IR. Several factors were analyzed, such as adsorbent dose, initial pH, initial concentration, and contact time. As a result of the conducted research, the maximum sorption efficiency was obtained at the level of 99.9%. The kinetics analysis and isotherms showed that the pseudo-second order equation model and the Freundlich isotherm model best suited this process. In conclusion, sewage sludge fly ash may be a suitable material for the effective removal of nickel from wastewater and the improvement of water quality. This research is in line with current trends in the concepts of circular economy and sustainable development.

Determine the Moisture Distribution in Sewage Sludge by Drying Differential

2014 ◽  
Vol 665 ◽  
pp. 404-407 ◽  
Author(s):  
Wan Yu ◽  
Pei Sheng Li
Keyword(s):  
Sewage Sludge ◽  
Interstitial Water ◽  
Bound Water ◽  
Free Water ◽  
High Accuracy ◽  
Moisture Distribution ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Hot Air ◽  
Critical Water Content

Moisture distribution in sewage sludge was considered as the essential of thermal drying. Some methods were given in literatures to test the moisture distribution, but there was no standard method to determine the critical water content between different kinds of water. The municipal sewage sludge was dried by hot air in this work. Based on the drying curve, the derivative of drying rate with respect to dry basis moisture content was brought out to analyze the moisture distribution in sewage sludge. Results show that this method can easily determine the free water, interstitial water, surface water and bound water with a high accuracy. The present work can provide new insight to determine the moisture distribution in sewage sludge, which was still lacking in the literatures.

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