TITLE

Hydrothermal multivariable approach. Full-scale feasibility study

AUTHOR(S)
Pérez-Elvira, Sara I.; Fernández-Polanco, Fernando; Fernández-Polanco, María; Rodríguez, Pilar; Rouge, Philippe
PUB. DATE
October 2008
SOURCE
Electronic Journal of Biotechnology;10/15/2008, Vol. 11 Issue 4, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A process configuration combining thermal hydrolysis (TH) and anaerobic digestion (AD) of sludge has been studied with the objective of analysing the feasibility of the technology for full scale installations. The study has been performed through pilot scale experiments and energy integration considerations, and a scheme of the most profitable option is presented: thermal hydrolysis unit fed with 7% total solids (TS) secondary sludge, anaerobic digestion of the hydrolysed sludge together with fresh primary sludge, and a cogeneration unit to produce green electricity and provide hot steam for the thermal hydrolysis process. From a technical and considered to be feasible. Based on the results of the pilot plant performance and the laboratory studies, the process has proven to operate successfully at a concentration of 7-8% TS. After the thermal hydrolysis, sludge viscosity becomes radically smaller, and this favours the digesters mixing and performance (40% more biogas can be obtained in nearly half the residence time compared to the conventional digestion). From an economic point of view, the key factors in the energy balance are: the recovery of heat from hot streams, and the concentration of sludge. The article presents the main energy integration schemes and defines the most profitable one: an energetically self-sufficient process, with a cogeneration unit. The scheme proposed has proven to need no additional energy input for the sludge hydrolysis, generates more that 1 MW green electricity (246 kW surplus with respect to the conventional process), and produces 58% less volume of Class A biowaste. The study and balances here presented set the basis for the scale-up to a demonstration plant (hydrolysis + anaerobic digestion + cogeneration unit).
ACCESSION #
35845224

 

Related Articles

  • Minimisation of excess sludge production in a WWTP by coupling thermal hydrolysis and rapid anaerobic digestion. Chauzy, J.; Graja, S.; Gerardin, F.; Crétenot, D.; Patria, L.; Fernandes, P. // Water Science & Technology;2005, Vol. 52 Issue 10/11, p255 

    In many cases, reducing sludge production could be the solution for wastewater treatment plants (WWTP) that here difficulty evacuating the residuals of wastewater treatment. The aim of this study was to test the possibility of minimising the excess sludge production by coupling a thermal...

  • High-Solids Anaerobic Digestion of Municipal Sludge Pretreated by Thermal Hydrolysis. Jolis, Domënec // Water Environment Research (10614303);Jul2008, Vol. 80 Issue 7, p654 

    High-solids anaerobic digestion can consistently achieve 55 to 60% volatile solids destruction after thermal hydrolysis pretreatment, which reduces its viscosity and increases the fraction of soluble organic matter. For feed sludge with total solids concentrations between 6.8 and 8.2%, the...

  • Is sonication effective to improve biogas production and solids reduction in excess sludge digestion? Braguglia, C. M.; Mininni, G.; Gianico, A. // Water Science & Technology;2008, Vol. 57 Issue 4, p479 

    Results of three semi-continuous anaerobic tests were reported and discussed. Each test was carried out by two parallel anaerobic reactors fed with waste activated sludge, either as it was sampled from the sewage treatment plant of Rome North or previously disintegrated by ultrasound treatment....

  • Co-digestion of glycerine and sewage sludge to optimise green electricity production. Maes, L.; Weemaes, M.; Hellinck, N.; De Gueldre, G.; Van De Steene, B. // Water Science & Technology;2013, Vol. 67 Issue 12, p2863 

    Sewage sludge and crude glycerine were co-digested in the mesophilic digester of Hoogstraten wastewater treatment plant. Additions of up to 1 kg of crude glycerine/(m3 reactor).(day) were done without significant operational problems. At higher dosage, severe digester foaming was observed....

  • NEW MARKETS FOR RECYCLED BEDDING FROM DIGESTERS. Dvorak, Steve // BioCycle;Oct2004, Vol. 45 Issue 10, p44 

    Focuses on the increased valuation of the separated biosolids from anaerobic digestion of diary waste in Holsum Diary in Wisconsin. Biogas produced per day by the anaerobic digestor installed by the Diary; Process of biosolid separation; Benefits gained by the company in implementing the...

  • Pilot-scale experiment on thermally hydrolyzed sludge liquor anaerobic digestion using a mesophilic expanded granular sludge bed reactor. Wei Qiao; Zhibiao Yin; Wei Wang; Jing Wang; Zhongzhi Zhang // Water Science & Technology;2013, Vol. 68 Issue 4, p948 

    A pilot process of thermal hydrolysis combined with an expanded granular sludge bed reactor (EGSB) was carried out to evaluate pretreated sludge liquor into biogas conversion, process stability, and energy input/output balance. Approximately 25% of suspended solids of sludge were liquefied into...

  • Kofermentace pÅ™ebytečného aktivovaného kalu a masokostní moučky. Máca, Josef; Zábranská, Jana; Jenéček, Pavel // Waste Forum;2010, Vol. 2010 Issue 1, p77 

    The interest in anaerobic treatment of biowaste in biogas plants increased rapidly in the last years. It is not only an appropriate method for disposal of such waste, but also biogas rich in energy can be gained by this process. Treatment of organic material with the best possible...

  • A DETAILED MONITORING OF AN ANAEROBIC DIGESTION PLANT IN NORTHERN ITALY. Bacenetti, Jacopo; Negri, Marco; Cantore, Andrea; Cantarella, Piercarlo; Fiala, Marco // Environmental Engineering & Management Journal (EEMJ);Nov2013 Supplement 11, Vol. 12, p109 

    An abstract of the article "A Detailed Monitoring of an Anaerobic Digestion Plant in Northern Italy" by Jacopo Bacenetti and colleagues is presented.

  • Case study: the characteristics of the biodegradable waste for the anaerobic digestion plant in Lisbon area. Vaz, F.; Torres, A.; C. Neiva Correia // Water Science & Technology;2008, Vol. 58 Issue 8, p1563 

    Taking into account the physical-chemical characteristics of the SC-OFMSW processed at Valorsul's anaerobic digestion plant, the influence of seasonal effects was studied. The waste presents a good quality, with a putrescible content of around 90%. In terms of chemical characteristics, the waste...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics