Hp Uiuc Part2

Biorefinery of municipal and industrial wastes: a new paradigm in waste management leading to biofuels and secondary resources Héctor M. Poggi-Varaldo CINVESTAV-IPN, Dept. Biotechnology and Bioengineering, Environmental Biotechnology R&D Group, Mexico DF, Mexico hectorpoggi2001@gmail.com GBPANAT

Acknowledgements
Ireri Robles-González, Karla Muñoz-Páez, Alessandro Carmona, Dra. I. Valdez-Vazquez, J. Acevedo-Benítez, Javier, Monserrat from the Environmental Biotechnology R&D Group of CINVESTAV
Prof. Elvira Ríos-Leal, Mr. Rafael Hernández-Vera, Dr. Fernando Esparza-García, from CINVESTAV
CINVESTAV for partial financial support
Dr. Franco Cecchi, Italy; Dr. Richard Sparling, Canada; Dr. Paolo Pavan, Italy
Agropark

Contents
Notation
Introduction
Oil and fossile fuels outlook and impact
Hydrogen advantages and production technologies
Objective
Intermittently-vented SSAH from paper mill waste
Intermittently-vented SSAH from organic waste
Semi-continuous acidogenic SSAD
Conclusions and outlook
Biorefinery from organic wastes

Notation BES 2-bromoethanesulfonate A-SSAD acidogenic solid substrate anaerobic digestion HSP or tt heat shock preatreatment IV-SSAH intermittently vented and flushed, solid substrate anaerobic hydrogen generation M-SSAD methanogenic solid substrate anaerobic digestion P H , P m maximum amount of accumulated H 2 (or CH 4 ) (mmole/reactor) R i,H , R i,m initial rate of H 2 (or CH 4 ) accumulation (  mole/(reactor.h))

Introduction GBPANAT

World oil production Duncan and Youngquist, 1998 Panic button

World Primary Energy Demand Priddle, 2002

Pollution
Fossil fuel combustion products are causing global problems:
greenhouse effect,
ozone layer depletion,
acid rain
other pollution effects

Renewable energy
Sustainable and eco-friendly
Variety of primary energy sources available
solar energy,
wind energy,
hydropower,
geothermal energy,
ocean currents, tidal and wave energy
biomass

Fuel candidates
None of the new primary energy sources can be used directly as a fuel
There are many candidates, such as
synthetic gasoline
synthetic natural gas (methane)
Methanol/ethanol
and hydrogen

The fuel of choice must satisfy the following conditions:
Transportation
Versatile
High utilization efficiency
and use should be safe
In addition, the resulting energy system must be environmentally compatible and economical.
Veziroglu and Barbir, 1992

Hydrogen: the best fuel
When we critically look at the fuel options under the criteria given above, it becomes clear that hydrogen appears to be the best fuel
Veziroglu, 1987; Barbir et al. , 1990; Veziroglu and Barbir, 1992 (Hydrogen experts and advocates say so.....) To inhibition of methanoarchaea

Hydrogen
Burning hydrogen produces only water with no CO, CO 2 , hydrocarbons or fine particles
H 2 + 1/2 O 2  H 2 O + 141.9 kJ/kg
Yamin et al. , 2000

Hydrogen production
Hydrogen can be produced
Chemically or thermo-chemically
electrochemically
as a by-product of oil/coal processing
by using microorganisms

Biological production of hydrogen
Three main systems to obtain hydrogen with microorganisms
Photochemical from water:
Algae 1
Photosynthetic bacteria 2
Dark fermentation from organic matter 3 :
Facultative anaerobes
Obligate anaerobes
Phototrophic fermentation from organic matter 3 :
Non sulfur purple bacteria
1.- Ike et al. , 1997; 2.- Melis and Happe, 2001; 3.- Nandi and Sengupta, 1998

Fermentative hydrogen production 1/2
Pure cultures
Studies on microbial hydrogen production has been conducted mostly using pure cultures, either natural or genetically modified
costly organic substrates
Disadvantages…
cost, and cost, and cost
Asada et al. , 2000; Evvyernie et al. , 2000, 2001; Fabiano and Perego, 2002

Fermentative hydrogen production 2/2
Mixed cultures
Hydrogen is a key intermediate in the anaerobic degradation of organic compounds
In these studies, hydrogen production resulted from the inhibition of methane fermentation
Advantages
H 2 may be recovered from wastewater or organic fraction of municipal solid wastes
no aseptic conditions required
Ueno et al. , 1996; Sparling et al. , 1997; Lay et al. , 1999; Mizuno et al. , 2000

Solid substrate anaerobic digestion (to be DASS is better than being SSAD)
Methanogenic SSAD is an effective way of reclaiming paper mill sludge and other wastes, for obtaining: 1
CH 4 as a fuel
Soil amender or protein enrichments from the digested solids
Yet, CH 4 or CO 2 as its combustion product are greenhouse gases 2
1.- Poggi-Varaldo et al. , 1997 a, b, 1999, 2002; 2.- Dickinson and Cicerone, 1986

Hydrogen and anaerobic digestion Sparling et al ., 1997; Brock ,1997; Chidthaisong & Conrad, 2000; Nagar-Anthal, 1996 Methanogenesis Acidogenesis Hidrólisis Hydrolysis Acetate Polymers (polysaccharides, lipids, proteins) Monomers (sugars, organic acids, aminoacids) Inhibitor
Chemical
BES
Lumazine
Acetylene
Physical or Phys-chem
pH
Thermal treatment

To Merits To IV-SSAH OFMSW To metabolites A-SSAD

Inhibiting methanoarchaea in methanogenic solid substrate anaerobic digesters
Hydrogen might be produced from organic wastes using microorganisms from M-SSAD, suppressing the activity of hydrogenotrophic methanogens with inhibitors such as:
chemicals: 2-bromoethanesulfonate (BES), acetylene, lumazine
heat-shock pretreatment (HSP)
acidogenic environment (low pH)
Sparling and Daniels, 1987; Sparling et al. , 1997; Valdez-Vázquez et al ., 2003

Solid waste in Mexico
Municipal solid waste: 53 000 tonne/day
Industrial solid waste: 370 000 tonne/day
Pulp and paper industry solid waste:
500 000 tonne/year
Dumping sites, few landfills
CNICP(1993), Poggi-Varaldo et al. (1997a)

Pulp and paper industry
It ranks second in the list of industrial polluters in Mexico
An important proportion of the solid waste stream is dumped in sites which do not meet actual sanitary landfill design standards and environmental regulations

Objectives
GBPANAT

T o review the research efforts of our Group on biological hydrogen production. This review concentrates on four areas:
(i) the study of batch, repeated fermentation of paper mill waste,
(ii) batch, repeated fermentation of the organic fraction of municipal solid wastes (OFMSW), and
(iii) the semi-continuous, acidogenic fermentation (A-SSAD) of the OFMSW
(iv) development of the concept of Biorefinery of Solid Wastes
To A-SSAD

Intermittently-vented SSAH from paper mill waste GBPANAT

Objectives
To determine the effect of the inhibitor of methanogenesis, i.e., acetylene (non specific), bromoethanesulphonate (BES), and oxygen on batch fermentation of paper mill waste
To evaluate the influence of venting and flushing with inert gas the headspace of reactors
Response variables:
maximum hydrogen production P H,max (mmole H 2 /reactor),
initial rate of hydrogen generation R i,H in each cycle of incubation (mmole H 2 / (reactor.h))

1.- Poggi-Varaldo et al. , 1997 a, 1999; 2.- Valdez-Vázquez, 2003; 3.- Sparling and Daniels, 1987 Waste office paper with 25% w/w dry matter content (80 g) glass juice bottles Anaerobic glove box… BES (25 mM) or Acetylene ( 1% v/v) 3 250ml 250ml 250ml Mesophilic, continuous M-SSAD Reactors 1, 2 These were autoclaved and stored until used 20 g of inoculum flushed with N 2 . Incubation at 37°C. paper paper paper H 2 Organic acids and solvents

1.- Poggi-Varaldo et al. , 1997 a, 1999; 2.- Valdez-Vázquez, 2003; 3.- Sparling and Daniels, 1987 Waste office paper with 25% w/w dry matter content (80 g) Recycled glass juice bottles In the anaerobic glove box BES (25 mM) or Acetylene ( 1% v/v) 3 Mesophilic, continuous M-SSAD Reactors 1,2 These were autoclaved and stored until used. 20 g of inoculum Venting and flushing with N 2 . Incubation at 37°C. Organic acids H 2 Glass juice bottles with waste office paper Hydrogen production

Effect of 1% acetylene on CH 4 and H 2 production: Preliminary experiments
A batch minireactor exposed to air at the start-up and spiked with acetylene.
Hollow squares: CH 4 ; Black squares: H 2
In an non-exposed, non-inhibited batch minireactor
Hollow circles: CH 4 ; Black circles: H 2
CH 4 , non-inhibited culture CH 4 , inhibited culture H 2 , inhibited culture Acetylene

Acetylene was a very effective inhibitor of the methanogenesis and facilitated the hydrogen accumulation
Exposure of batch minireactors to air had a slight inhibitory effect on the methanogenic microflora. The effect was reversible:
it has been reported that methanogenic Archaea in anaerobic, methanogenic consortia can tolerate the exposure to O 2 , 1 and the protective effect increased with increasing concentrations of sucrose. 2
1.- Estrada-Vázquez et al. , 2001, 2002; 2.- Estrada-Vázquez et al., 2003

Intermittently vented solid substrate anaerobic hydrogen generation (IV-SSAH)
Hollow circles: CH 4 from non-inhibited minireactors
Black circles: H 2 from minireactors spiked with BES
Black triangles: H 2 from minireactors spiked with acetylene
N 2 N 2 N 2

Parameter

IV-SSAH 1/2
The plateau and initial rates of H 2 accumulation decreased in each subsequent cycle of incubation
Yet, the total cumulative H 2 harvested in the three cycles was nearly double than that in the first cycle alone
The total H 2 accumulated in the batch minireactors spiked with acetylene was slightly better than that corresponding to the minireactors spiked with BES

IV-SSAH 2/2
Venting and flushing the headspace with N 2 would have released the product inhibition effected by the H 2 on the activity of some fermentative microorganisms in the consortia (for instance, syntrophic bacteria)
Brock and Madigan, 1991

Organic acids
Another cause contributing to the biochemical inhibition might be the accumulation of organic acids
A conservatively low estimate of butyric (HBu) and acetic acid (HAc) final concentrations can be made based on the biochemical equations 1 and 2 in the latter Table
To Table Biochemical Reactions

Organic acids
We made the following simplifying assumptions:
95% of the paper is degradable cellulose
cellulose is approximately equal to glucose
half of the consumed substrate is fermented according to Eq 1 and the other half to Eq. 2
the H 2 harvested is directly related to consumed substrate

Organic acids
Final concentration of short chain volatile organic acids approx.
6 800 mg HAc/kg wet basis (34 000 mg HAc/kg dry initial substrate)
6 000 mg HBu/kg wet basis (25 000 HBu/kg dry inittal substrate)
can be expected in the solid phase at the end of the 3rd cycle

IV-SSAH merits with respect to other biological alternatives
More cost-effective than processes working with pure microbial strains
More attractive than processes that ferment soluble carbohydrates to H 2
No light is needed as compared to photobiological H 2 production
The inhibitor used (acetylene) is a cheap gas that will exit the bioreactor with the H 2 -rich gas stream

However…
The kinetics of H 2 accumulation is slower than reported rates for liquid fermentation processes
There is a potential for lower H 2 yields than those of processes using pure cultures
There is an upper limit for the amount of H 2 that can be obtained via anaerobic fermentation of carbohydrates
To table Biochem. Reactions

Intermittently-vented SSAH from organic waste GBPANAT

Objectives
To determine the effect of:
origin of inocula (from meso- and thermophilic methanogenic SSAD reactors; M and T, respectively),
inhibition of the methanogenesis (acetylene and heat shock pretreatment, Ac or tt, respectively), and
incubation temperature (37 o C and 55 o C, M and T, respectively)
on batch fermentation of organic fraction of municipal solid waste
Response variables:
maximum hydrogen production P H,max (mmole H 2 /reactor),
initial rate of hydrogen generation R i,H (mmole H 2 /(reactor.h)),
lag time, and
accumulation of organic acids and solvents

1.- Poggi-Varaldo et al. , 1997 a, 1999; 2.- Valdez-Vázquez, 2003; 3.- Sparling and Daniels, 1987 Organic fraction of MSW with 25% w/w dry matter content (80 g) glass juice bottles Anaerobic glove box… Heat-shock pretreatment or Acetylene ( 1% v/v) 3 250ml 250ml 250ml Meso- and thermophilic continuous M-SSAD Reactors 1, 2 These were autoclaved and stored until used 20 g of inoculum flushed with N 2 . Incubation at 37°C or 55 o C. H 2 Organic acids Solvents

Kinetics of H 2 production from organic fraction of municipal solid waste fermentation by anaerobic consortia: First cycle of incubation (a) heat-shock pretreated mini-reactors; (b) mini-reactors treated with acetylene; M mesophilic; T thermophilic.

Main effect of inhibition treatment on performance of first cycle of incubation tt: heat-shock pretreatment; Ac: acetylene; VOA volatile organic acids (sum of acetate, butyrate and propionate); solvents sum of acetone and ethanol

Main effect of incubation temperature on performance of first cycle of incubation M: mesophilic incubation; T: thermophilic incubation; VOA volatile organic acids (sum of acetate, butyrate and propionate); solvents sum of acetone and ethanol

Semi-continuous acidogenic SSAD GBPANAT

Objectives
To evaluate the effect of the temperature regime (meso- and thermophilic ) on semi-continuous acidogenic SSAD of organic fraction of municipal solid waste
Response variables:
hydrogen percentage in biogas,
biogas productivity,
H 2 yield (NmL H 2 /gVS rem ),
organic acids and solvents concentrations in spent solids

1.- Poggi-Varaldo et al. , 1997 a, 1999; 2.- Valdez-Vázquez, 2003; 3.- Sparling and Daniels, 1987 Organic fraction of MSW with 35% w/w dry matter content Mesophilic, continuous A-SSAD Reactors 1, 2 Biogas H 2 Spent solids: Organic acids and solvents Thermophilic continuous A-SSAD Reactors 1, 2 Biogas H 2 Spent solids: Organic acids and solvents

Reactors setup for semi-continuous hydrogen production

Typical performances of acidogenic, semi-continuous reactors fed with the organic fraction of municipal solid waste Black symbols: biogas productivity; hollow symbols: H 2 yield; squares: Thermophilic reactor 1; circles: Mesophilic reactor 1. The methane contents in both reactors were less than 0.5%. Thermophilic A-SSAD Mesophilic A-SSAD

Evolution of pH in acidogenic semi-continuous reactors fed with the organic fraction of municipal solid waste Black symbols: Thermophilic reactor 1; hollow symbols: Mesophilic reactor 1 Thermophilic A-SSAD Mesophilic A-SSAD

Average distribution of volatile organic acids and solvents in the spent solids of the acidogenic, solid substrate reactors fed with the organic fraction of municipal solid waste HAc HAc HBu HBu To Table

Comparison of biological hydrogen production from organic fraction of municipal solid waste by anaerobic cultures

Conclusions
GBPANAT To Conclusions A-SSAD

Preliminary experiments:
Similar final H 2 productions were obtained for reactors spiked with acetylene and BES, although a slightly lower for the minireactors spiked with BES
O 2 as methanogenic inhibitor was not successful
Acetylene and BES OK. Acetylene has a lower cost than BES and does not accumulate in the solid materials

IV-SSAH from paper mill waste:
Plateaux and initial rates of H 2 accumulation decreased in each subsequent incubation cycle
Total cumulative H 2 harvested in the three-cycle incubation was double than that in the first cycle alone (17 and 34 mmole/bottle)
Kinetics of H 2 accumulation is very slow
Acetylene and BES work OK as inhibitors of methanogenesis. Acetylene has a lower cost than BES and does not accumulate in the solid materials

IV-SSAH from organic fraction of municipal solid waste:
Acetylene was more effective than HSP
Incubation at 37 o C gave the highest hydrogen accumulation in the batch reactors
Origin of inocula did not have a significant effect on hydrogen production
Units with thermophilic inocula that were treated with HSP and thermophilic incubation gave the poorest hydrogen production in the first cycle, but interestingly, they somewhat improved the hydrogen production in the subsequent cycles

Semi-continuous acidogenic SSAD of organic fraction of municipal solid waste:
Higher p ercentage of H 2 in the biogas of thermophilic reactors than that in mesophilic ones (60 and 43%, respectively)
Hydrogen yield of the thermophilic A-SSAD was significantly higher than that of the mesophilic reactors (470 versus 150 NmL/gVS)
Higher concentrations of volatile organic acids in the spent solids of the thermophilic reactors than in the corresponding solids of the mesophilic units

Our results point out to a feasible strategy for obtaining higher H 2 yields from the fermentation of industrial and municipal solid wastes, and a possible combination of waste treatment processes A-SSAD and M-SSAD
Useful products of this approach would be
H 2
organic acids and solvents
CH 4
and anaerobic digestates that could be used as soil amenders or protein enrichments for animal feed

Lo que vendrá (Tango, Astor Piazzolla)
Biorefinery from
organic solid wastes
Cuando el destino nos alcance…

Organic solid waste H 2 IV-SSAH or A-SSAD Spent solids Extracts Photo-heterotrophic fermentation Microbial fuel cells Electricity Downstream processing Acids Solvents M-SSAD CH 4 Animal feed Fertil- izer Adapted from Poggi-Varaldo, H.M. (2006) CH 4

Sustainable development in Mexico City = Biorefinery of solid wastes 1 ton OFMSW
47 kW-h biohydrogen
1050 kW-h methane
50 to100 kg of organic acids and solvents
600 kg fertilizer
Recyclables 0.3 ton

Biofuels from food or from wastes?
In the world in which we live, each year millions of people die from the lack of food.
However, none dies for not having a car to drive.
Carlos Escamilla-Alvarado, Mexico, 2008

First International Congress of Biotechnology and Bioengineering 1ICBB Mexico City, Mexico, CINVESTAV Novembre 5-7, 2008 [email_address]

3rd International Meeting on Environmental Biotechnology and Engineering 3IMEBE Palma de Mallorca, Baleares Islands, Spain September 2008

Subjects: Microbial Ecology Molecular Biology Applications Soil Remediation Environmental Risk Assesm. Groundwater remediation Sustainable Development Phytoremediation Wastewater Treatment Solid and Hazardous Wastes Process Modelling and Control Environmental Chemistry Atmospheric pollution Information : [email_address] [email_address] www.cinvestav.mx/2IMEBE

Questions
and
Uncertainties
GBPANAT [email_address]

Shadow
I am just the shadow
of my echo.
I go back and treasure
my yesterday,
and I abhor of tomorrow
and its treachery.
Yet, I fade away,
prisoner of a perverse game
of blind mirrors
and blind doors.
Now, I am just
a shiver
of the echo
of my shadow.
Sombra Soy tan solo la sombra de mi eco. Regreso y me abrazo a aquel mi ayer, y abjuro horrorizdo del mañana y sus traiciones. Sin embargo, desaparezco prisionero de un perverso juego de espejos ciegos y puertas falsas. Ahora, soy tan solo un temblor del eco de mi sombra. HMP-V, Mexico, 2006

hectorpoggi2001@gmail.com

Despedida Farewell
Me miro al espejo I look at myself in the mirror
y sólo veo but I can only see
la desnuda pared a mis espaldas. the bare wall behind me.
Me estremezco y me pregunto: I shiver and mutter:
¿quién llorará nuestras derrotas? Who will cry for our defeats?
¿quién soñará nuestros sueños? Who will dream our dreams?
¿quién peleará nuestras batallas? Who will fight our battles?
¿quién ganará nuestras victorias? Who will win our victories?
HMP-V, March 2003

Hp Uiuc Part2

by zirbruno

Accessibility

Categories

Upload Details

Usage Rights

3 Embeds 3

Statistics

Hp Uiuc Part2 Presentation Transcript

http://static.slideshare.net	1
http://s3.amazonaws.com	1
http://hpoggi.web44.net	1

Hp Uiuc Part2

by zirbruno

Accessibility

Categories

Upload Details

Usage Rights

3 Embeds 3

Statistics

Hp Uiuc Part2 Presentation Transcript

Let LinkedIn power your SlideShare experience

Let LinkedIn power your SlideShare experience

Customize SlideShare content based on your interests

Keep up to date when your LinkedIn contacts post on SlideShare