Wet oxidation of domestic sludge and process integration: the Mineralis® process

2001 ◽  
Vol 44 (10) ◽  
pp. 163-169 ◽  
Author(s):  
T. Lendormi ◽  
C. Prévot ◽  
F. Doppenberg ◽  
M. Spérandio ◽  
H. Debellefontaine
Keyword(s):  
Sewage Sludge ◽  
Process Integration ◽  
Batch Reactor ◽  
Ammonia Nitrogen ◽  
Treatment Temperature ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Wet Oxidation ◽  
Environmental Standards ◽  
Sewage Sludge Treatment

Wet oxidation (WO) in subcritical conditions is a new alternative to usual routes for sewage sludge treatment that complies with environmental standards. This paper presents tests carried out using a batch reactor and continuous pilot and industrial units, treating municipal sewage sludge. The main products after oxidation are CO2, water, VFA and ammonia. The results highlight the considerable influence of the treatment temperature and of the type of sewage sludge which is treated. At temperatures around 240°C, VFA fraction present in WO supernatant is limited to 50% because of the presence of non-degraded fatty compounds and surfactants. Moreover, the COD reduction is limited to 70%. On the contrary, at 300°C, COD removal efficiencies greater than 80% are achieved without any catalyst addition and, in addition, only highly biodegradable compounds remain in the oxidised liquor. In order to treat the residual ammonia nitrogen by biological processes, it is therefore necessary to obtain a VFA fraction as high as possible for achieving denitrification and then to operate the WO process at high temperature and without catalyst addition.

Subcritical wet oxidation of municipal sewage sludge: comparison of batch and continuous experiments

2001 ◽  
Vol 44 (5) ◽  
pp. 161-169 ◽  
Author(s):  
T. Lendormi ◽  
C. Prevot ◽  
F. Doppenberg ◽  
J.N. Foussard ◽  
H. Debellefontaine
Keyword(s):  
Sewage Sludge ◽  
Residence Time ◽  
Bubble Column ◽  
Batch Reactor ◽  
Municipal Sewage ◽  
Continuous Reactor ◽  
Municipal Sewage Sludge ◽  
Bubble Column Reactor ◽  
Wet Oxidation ◽  
Oxidation Reactor

Wet oxidation in subcritical conditions is a new alternative to usual routes for sewage sludge treatment and it complies with environmental standards. The paper presents tests carried out on a batch reactor and on a continuous pilot unit, treating municipal sewage sludge. A method is proposed that shows that the oxidation efficiency in a continuous reactor can only be easily predicted from the residence time distribution and batch tests results. Nevertheless, a partial settling of the solid residue in the continuous bubble column reactor is evident, and it increases the solid residence time and then decreases its organic content with respect to a similar batch test. In addition, these results highlight the considerable influence of temperature in the oxidation reactor and of the type of sewage sludge which is treated. At temperatures around 240deg;C, foaming can seriously impair the operation of the continuous reactor, because of the presence of non-degraded fatty compounds and surfactants. Moreover, the COD reduction is limited to 70%. On the contrary, at 300deg;C, COD removal efficiency greater than 80% is achieved without any catalyst additive and, in addition, only highly biodegradable compounds remain in the oxidised liquor.

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.

Ceramic Material from Sewage Sludge as Support Material Supply Water Filtration

2012 ◽  
Vol 727-728 ◽  
pp. 1398-1401
Author(s):  
Leandro C. Morais ◽  
A.H. Rosa ◽  
L.F. Fraceto ◽  
A.C.T. Toledo ◽  
V. Campos
Keyword(s):  
Water Treatment ◽  
Sewage Sludge ◽  
Thermal Treatment ◽  
Filter Material ◽  
Treatment Temperature ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Material Supply ◽  
Treated Sewage ◽  
High Standards

This study shows a possibility of using municipal sewage sludge after thermal treatment in the production of a filtering material to water treatment. Due to the fast urbanization and implementation of high standards for effluent in many countries in recent years, the sewage sludge is being produced in an ever increasing amount. Therefore, the use of sludge is a suitable solution for the expected large quantity of sludge. Dehydration of sludge was performed by controlled heating at temperatures of 1100°C, 850°C, 650°C, 350°C for 3 hours. After thermal treatment the sludge was characterized by X-ray fluorescence, TG/DTG/DTA, residue solubilization and residue lixiviation tests. The aim of the present work was to observe, thought the characterization techniques, if the treated sewage sludge is or not adequate to be used as filter material to water treatment. It will be verified which treatment temperature of the sludge offer possibility to its use in water treatment without carrying pollutants in concentrations out of the standards.

scholarly journals Biogas Production through Co-Digestion of Olive Mill with Municipal Sewage Sludge and Cow Manure

2021 ◽  
Vol 20 (2) ◽  
pp. 1-11
Author(s):  
Said Al Rabadi ◽  
◽  
Kamel Al-Zboon ◽  
Moayyad Shawaqfah ◽  
Rebhi Damseh ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Biogas Production ◽  
Batch Reactor ◽  
Anaerobic Treatment ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Experimental Investigations ◽  
Cow Manure ◽  
Operational Parameters ◽  
Olive Mill

The treatment of olive mill (OM) residues from agricultural facilities is a daunting challenge since tremendous amounts are disposed per annum that should be treated. One of the promising treatment methods is the anaerobic methanogenic digestion of OM residues. In current investigations, the anaerobic digestion of the OM substrate is enhanced through mixing its slurries with sewage sludge (SS) or with cow manure (C), which consists of the kernels for the digestion process. Besides feedstock, other operational parameters such as hydraulic retention time (HRT), temperature and pH have a great impact on the biogas production rate and quality. Experimental investigations were conducted by means of the anaerobic biodegradation of the substrate for OM-SS and -C using a batch reactor under mesophilic conditions and foreseen HRT for 30 days. Almost neutral pH values of 7.4-7.6 were found for the anaerobic treatment of the substrate for OM-SS, and a slightly acidic pH in the range of 4.8-5.3 was found for the anaerobic treatment of the substrate for OM-C. The results revealed that the biogas production for OM-SS and -C exceeded 0.07 and 0.31 LBiogas/(LFerm·day), respectively. Regarding the COD reduction, its removal efficiency was obtained as 46.1 and 53.8% for OM-SS and -C respectively. For economic concerns, significant methane yields were attained as 56.8 and 115.8 [LCH4/kgCOD] for the OM-SS and -C substrates, respectively. In virtue of these remarkable merits, anaerobic methanogenic digestion should be adapted to a commercial scale for the treatment and biogas production of OM residues.

Application of the Wet Oxidation Process to the Treatment of Municipal Sewage Sludge

2000 ◽  
Vol 21 (10) ◽  
pp. 1193-1198
Author(s):  
T. Lendormi ◽  
C. Prévot ◽  
F. Doppenberg ◽  
H. Debellefontaine ◽  
R. Pujol
Keyword(s):  
Sewage Sludge ◽  
Oxidation Process ◽  
Municipal Sewage ◽  
Municipal Sewage Sludge ◽  
Wet Oxidation

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

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.

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