chatelot16 wrote:
the solid part of the digestate can go to the trash and the liquid part to the sewer
The STEP Tours produces and injects biomethane since November 2016
The biogas purification unit in biomethane installed at the David Grange water treatment plant, which processes the waters of the agglomeration of Tours, has now been connected to the GrDF network (November 2016) for one year. It has injected more 774 000 Nm3 than biomethane. This production equals the natural gas consumption of 500 homes.
The rate of availability of the membrane purification unit developed by Bright Biomethane and maintained by HoSt has exceeded 97%. For this project, the purification unit has been connected to the existing anaerobic digestion plant. It separates with high efficiency methane and carbon dioxide with a methane recovery rate of more than 99,5% this unit provides a type H biomethane at 97% methane. The plant produces 107 Nm³ / h of biomethane from 190 Nm³ / h of raw biogas.
All the components of the purification unit, including the compressor, the control system, the membranes, the odorization system, the biogas analysis and the evacuation, are in a single container of 12 meters. long.
The container of the biomethane purification unit, photo Bright Biomethane
Biomethane: two new sites connected to the GRTgaz network
AFP published on Jan. 04. 2018
The manager of the gas transmission network GRTgaz announced Thursday the commissioning of two new biomethane injection sites in its network, the first two years.
Biomethane comes from the purification of biogas, made from the fermentation of organic matter, mainly agricultural or household waste. The two sites are located in Noyen-sur-Seine (Seine-et-Marne) and Les Essarts-en-Bocage (Vendée), and will produce the equivalent of the annual consumption of 4 800 gas-heated housing, detailed GRTgaz in a statement.
The first project was developed by a farmer, while the second was carried by a duck producer and the developer of Fonroche Biogaz methanizers. Three sites are now directly connected to GRTgaz's transmission network, two years after the commissioning of a first site in Saône-et-Loire.
At the end of December 2017, 44 biogas plants inject renewable gas into French gas networks, says GRTGaz, most of them connected to the distribution network, notably managed by Grdf, another subsidiary of Engie (formerly GDF Suez). GRTGaz says it has now counted 28 biomethane injection projects in line for a connection to its network, at various stages of development. More than 500 sites currently produce unpurified biogas, which is not injected into the grid but used for electricity or heat.
2015's energy transition law has set a target of having 10% of the gas consumed in France from renewable sources in 2030, compared with a still marginal share today. Biogas and biomethane stakeholders estimate that France could reach a share of 30% green gas by 2030. The sector has difficulties developing due to delays in obtaining funding and the necessary authorizations as well as significant technical constraints.
14 works of Lecornu to release anaerobic digestion in France
Aurélie Barbaux Factory New the 26 / 03 / 2018
The working group on the liberation of the methanisation made its conclusions. He advocates 14 actions to help farmers supplement their income, professionalize the anaerobic digestion system and accelerate projects.
No secret, to reach the goal of 10% renewable gas in 2030 consumption by 2015 energy transition law, France needs its farmers. It is in fact anaerobic digestion, the production of biogas after fermentation of agricultural waste, which is the best way today to produce renewable gas in France. Other technologies, such as gasification or power-to-gas are still in development. But today France produces less than 1% of the gas it consumes. As for the end wind 2017, the group has therefore launched in January 2018 workshops to release methanation. It was expected the conclusions for the Agricultural Fair, but the Secretary of State for ecological transition and solidarity, Sebastien Lecronu, did not reveal the result that Monday 26 March. The working group recommends 14 actions to help farmers to supplement their income, professionalize the anaerobic digestion system and accelerate projects while developing a French sector.
1 - Launch a call for tenders for atypical projects.
The idea is to integrate methanization projects with injection that do not fit into the specifications of existing tenders, which currently focus exclusively on the installation of methanisers. These projects will increase the production of biogas at existing sites.
2 - Create a non-tender feed-in tariff for small installations
The state will simplify the tariff support rules with the creation of an open-face feed-in tariff for medium-sized 500 kW installations at 1 MW rather than bidding too heavy for this size of project. This measure will be taken by order.
3 - 100 BPI guarantee fund millions of euros
To facilitate access to credit for farmers with an anaerobic digestion project, the Minister of Agriculture has announced that he will devote 100 million euros to the Large Investment Plan (GPI) to fund a BPI guarantee fund. for the benefit of agricultural biogas projects.
4 - No longer consider digestate waste
To facilitate the organic recovery of digestates (residues of anaerobic digestion that can be used as fertilizer) and secure farmers' supplies, an adapted standard dedicated to digestates will be developed with the profession, as one already exists on composts.
5 - Allow the use of bioGNV by agricultural machinery
The use of bioGNV by agricultural machinery will be made possible on the national territory following a work in progress at European level on the amendments to Regulation 167 / 2013 on the approval of agricultural vehicles and its delegated acts ( 2015 / 96 and 2015 / 504 regulations).
6 - Financing methanizers supplying CNG stations
Financial support will be put in place for the methanisers that supply the vehicles (buses, trucks) to develop a new direct local use of biomethane, particularly in remote areas of the gas network.
7 - Training in good practices
Training will be set up for all stakeholders, with a steering of the Ministry of Agriculture as regards training for the agricultural world. This training plan will help project leaders to present plans limiting nuisances and promoting local dialogue.
8 - Push the die for certification
The structuring of the sector must allow each actor in the value chain (investors, project leaders, engineering firms, equipment manufacturers, operators) to adapt to the French multi-input context and to fit into an economic model. sustainable. One of the keys to this structuring is the initiation of a quality approach (guides, charters, labels, certification, standards, etc.) to promote efficient project development, reassure investors and reduce costs. of production.
9 - Simplifying the regulation of classified installations (ICPE)
The State will reduce the processing time from 1 year to 6 months and increase the threshold applicable to the ICPE declaration (100 tonnes / day against 60 tonnes / day). This registration regime, which is more flexible, will be extended to all the ICPE biogas activity, in addition to the possible reporting regime for agricultural methanation.
10 - Create a one-stop shop for regulatory records
Each prefect will designate a “one-stop-shop” state service to receive the various regulatory files relating to methanizers (ICPE / IOTA or health approval file).
11 - Simplifying the regulation "water law"
Methanizers subject to registration or ICPE declaration will henceforth be subject to the "registration" regime, which will result in the elimination of the impact study and the public inquiry.
12 - Allow Mixtures of Inputs
Moving to a larger scale involves developing large-scale methanisers and diversifying the deposits to be methanised (waste from the agro-food industries, biowaste, landfill biogas, sludge from wastewater treatment plants). The government expects a gradual decline in production costs (100 80 euros / MWh) and the development of a French and European biogas equipment.
Mixtures of inputs will therefore become possible, but only under enhanced safety conditions for agricultural land in the case of digestate application. By default, the blend will apply the strictest spreading rules to its components and a general traceability rule will be defined.
13 - Generalize the anaerobic digestion of sludge from major wastewater treatment plants
Only 22% of sewage sludge is methanised. To generalize it, a work with the communities and the professionals starts to specify the calendar and the supports. Anaerobic digestion significantly reduces sludge volumes and also facilitates other uses than spreading.
14 - Create a "right to injection"
The working group proposes the creation of a "right to injection" in the natural gas networks as soon as the anaerobic digestion installation is located near an existing network to prevent projects from being blocked due to lack of capabilities. Network managers will be responsible for making the necessary investments to make this possible.
Les Mureaux: city gas thanks to your excrement
Mehdi Gherdane | 23 may 2018,
And yes, sewage treatment plants can produce green and clean gas! This will be the case in a year in Les Mureaux.
The inhabitants of the Seine Valley will soon be able to warm themselves thanks to their toilets. The Suez group laid down on Wednesday the first stone of a biogas plant in Les Mureaux. This equipment operates on a diabolically simple principle: the gases produced in the purification plant of Les Mureaux will be recovered to be injected into the city network.
By what process? When you flush the hunt, the wastewater is sent to a treatment plant where it is decanted and filtered. This results in liquid sludge, from excrement, which will undergo several treatments and ferment. And it is this fermentation that will produce methane, a gas labeled "organic" since it generates no pollution. In the end, it's about creating organic through dirty!
A first in Ile-de-France
According to Suez, who will be piloting this equipment, the gas will heat 1 200 homes in the area. The inhabitants will not have the opportunity to know if their boiler will use bio methane or not because at the factory, it will be directly injected into existing pipes.
Funded in large part by the Grand Paris Seine & Oise urban community, this plant will come into service at the end of 2019. It will be the only one in Ile-de-France to operate on this principle. The regional council, which contributes 8% to this 22,5 M € project, wants to make it the showcase of a greener policy. "The objective is to increase the share of renewable energy in Ile-de-France," indicates Jean-Philippe Dugoin-Clément, vice-president (UDI) of the region, in charge of ecology. 90% of the energy consumed in Ile-de-France is now imported. It is unthinkable to continue like this. "
In France, another installation of this type exists in Strasbourg and a similar project has just been launched in Marseille. Our country is lagging behind some European neighbors. In Sweden, for example, half of the buses in Stockholm have been running on biomethane for several years.
Produce gas with corn
22th May 2018
Maize is the raw material with the highest methanogenic potential and the most competitive crop for this market. Some elements of understanding on the subject ...
The methanogenic potential of a culture corresponds to the quantity of methane that can be produced after a methanation treatment. This potential is expressed in volume of methane reduced to the mass of organic matter of the plant. The unit used is Nm3 CH4 / kg MO or per kg MF (Nm3 for normal cubic meter, MO for organic matter, MF for fresh material). In all publications, maize is the crop producing the most methane, with an average of 220 Nm3 CH4 / kg MF, far ahead of the grass that produces on average 172 Nm3 CH4 / kg MF.
Differences between varieties
The methanogenic potential varies from one variety to another. It is estimated that, depending on the variety, the accessibility of organic matter to biodegradation in the digester differs. The growth of anaerobic digestion in Germany has brought a lot of references. Today, maize varieties for biogas can be specifically listed in Germany. Their methanogenic power is specified using an officially accepted equation. The second parameter to take into account is the yield per ha. The choice of a maize variety therefore remains linked to the coupling between production performances per hectare and methanogenic power.
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chatelot16 wrote:I do not think that the injection of biomethane in the network is the best solution: it requires a perfect purification of the gas to avoid causing dangerous corrosion in a network planned for methane usually pure .....
Biomethane injection speeds up and sees big
By Giulietta Gamberini The 06 / 04 / 2018 Tribune,
In 2017, the number of installations increased by 70%, and the volumes injected by 89%, reveals the very latest "Panorama of renewable gas". Confident in the support of the government, which has just closed a dedicated working group, professionals in the sector have an injection target of 50 Twh in 2028.
Authorized only from 2001, the injection of biomethane into the networks remains in France still very modest. In 2017, 44 biogas production units valued it in this form, against 548 to produce heat or electricity (sector, this one, regulated since 2006). Only 0,1% of all natural gas consumed in France was bio-methane.
Last year nevertheless seems to have been the one of take-off, reveals the third "Panorama of renewable gas" published Thursday, April 5, which identifies an increase in the number of installations of 70% (against 5% for the biogas production units in cogeneration), and a growth in injected volumes of 89%. In particular, 406 GWh of biomethane was introduced into the network, ie the equivalent of the consumption of approximately 34.000 households, while the connected park had a maximum annual capacity of 682 GWh.
30% of French consumption in 2030
The prospects for the future are even better, notes the Panorama. 361 projects are in fact "in the queue", ie potentially operational within 2 to 5 years. Their maximum cumulative capacity, of 8TWh / year, corresponds to the objective set by the latest "Multi-year energy program for the injection of biomethane into the network in 2023", which would correspond to 2% of French gas consumption. . Professionals in the sector even hope to triple the target of 10% renewable gas in French consumption, set by the energy transition law for 2030, and thus have, as part of the work in progress on the new PPE, a target of injection of 50 Twh in 2028. They are counting in particular on the support of the public authorities, which undoubtedly contributed to the recent take-off, and which seems to be confirmed by the latest government positions.
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