Biogas Production - Science topic

Hello! Our current project is to create a plant/equipment design on biogas production from food waste from food waste generated by a specific restaurant. The data they can provide is only the weight of the food waste they generate per day.

Our PFD includes size reduction, hydrolysis tank, anaerobic digester and scrubber system.

In recent years, in connection with the inclusion of the agricultural sector in the process of green transformation of the economy as well, new solutions are being sought, created and implemented to enable the transformation of productive farms into sustainable, pro-environmental, pro-climate, organic farms growing crops and other aspects of agricultural activity in accordance with the principles of organic farming and with the simultaneous implementation of sustainable development goals. Accordingly, on a farm operated in accordance with the formula of sustainable organic agriculture, pesticides and other chemical pesticides and chemically produced fertilizers are not used in agricultural crops, energy is obtained from renewable and emission-free energy sources, water is obtained mainly from rainwater catchment facilities, organic manure and processed organic waste from composters are used to fertilize farm fields, crop rotations are used within the framework of multi-year cycles to restore high soil quality and prevent soil aridity, individual farm fields are separated by green belts and flower meadows to provide foraging areas for pollinating insects, on-farm mini-treatment plants are built to treat wastewater generated on the farm and not used in a specific way for farm purposes, etc. Besides, on a farm run according to the formula of sustainable organic farming, available technologies for the production of biofuels based on organic compost, from organic waste from agricultural crops, through which motor fuel is produced to power tractors and other agricultural machinery, should be used. These may include the construction of biogas plants, where biogas can be produced, which can then be used to power agricultural machinery. Besides, in a sustainable, ecological, pro-environmental, pro-climate farm, agro-tourism activities may also be developed, and certain preserves, food products, such as jams, juices, cheeses, etc., may be produced within the framework of a micro-production activity or manufactory, within the framework of local brands on the basis of organically produced, cultivated crops. In addition, such sustainable, organic agritourism farms may be associated within a local producers' cooperative with silos, warehouses, etc. in which crops from the cultivation of several or more locally operating farms and/or agritourism farms are stored, including or mainly, only those operating under the formula of sustainable organic farming.

In view of the above, I address the following question to the esteemed community of scientists and researchers:

And what is your opinion on this topic?

What is your opinion on this issue?

Please answer,

I invite everyone to join the discussion,

Thank you very much,

Warm regards,

Dariusz Prokopowicz

In order to slow down the progressive process of global warming, it is necessary to increase the efficiency and accelerate the implementation of the green transformation of the economy in order to create a sustainable, zero-emission, green circular economy as quickly as possible. In the process of efficiently implementing the green economy transition, there are several essential components, which include the green energy transition based on the development of renewable and zero-emission energy sources, the development of electro-mobility, the development of sustainable organic agriculture, sustainable energy-efficient construction, low-carbon mining and industry, etc. The development of agricultural cooperatives that run sustainable business ventures supporting farm management, the development of composting facilities, the improvement of the post-agricultural waste separation system and increasing recycling, the development of small-scale renewable and zero-emission energy power plants supplying energy to farms, and the development of biogas plants are important factors in the development of sustainable, zero-emission organic agriculture that also realises the objectives of sustainable development and the principles of a sharing economy and a closed loop economy. Biogas plants, including microbial energy plants that generate energy from biogas that can be produced from livestock manure, can play an important role in bringing about a green transformation of agriculture to create sustainable, emission-free, climate- and environment-friendly organic agriculture, including both sustainable, emission-free agriculture based on crop production and emission-free livestock farming. Biogas plants can be set up and built primarily by farmers' cooperatives and microbial gas plants can be built within individual farms. In this way, farms can be self-sufficient in energy. In addition, a positive pro-climate effect results from the combustion of methane, which is particularly strong in terms of generating the greenhouse effect, because even if the CO2 produced by combustion is not bound into certain rock materials and is released into the atmosphere, the greenhouse effect will be much weaker compared to methane. However, a much better pro-climate solution would be not to emit CO2 into the atmosphere, but to bind it to a specific rock form or to inject it deep into the earth's crust in rock layers that will absorb and chemically bind the gas. In view of the above, biogas plants can play an important role in the development of sustainable, emission-free organic agriculture. However, fully climate-friendly biogas plants will be those that do not generate other greenhouse gases when burning methane. Biogas plants can also produce bioethanol, the combustion of which can be a source of energy and has low emissions.

In view of the above, I would like to address the following question to the scientific and research community:

What do you think about this topic?

What is your opinion on this subject?

Please respond,

I invite you all to discuss,

Thank you very much,

Best wishes,

Dariusz Prokopowicz

BIOGAS PRODUCTION/BIO-ENERGIES

I looked at biomethanation, H2 supplemention and a two-phase system, but I was hoping to look at other technologies if they existed. Any recommendations would be appreciated.

Good morning,

I am proposing home biogas production solutions.

They are containers in very resistant flexible material.

The problem is that, when temperatures drop, bacteria have a hard time doing their job (anaerobic digestion of manure and food waste mixed with water).

The problem is harder in remote rural zones, without electricity, where solar panels cannot be installed.

Second problem: the cost.

There are heating covers, but they are very expensive and the farmers can't spend more money to heat digesters than to buy them.

Do you know any other system to heat digesters or biomass inside?

Thank you all for any replies.

Does anyone have any case studies on the Environmental Impact of Milk Production?

Environmental Impact of a Dairy is what I studied but unfortunately it is completely different with that of the Milk Production

Capacity of plant is around 2-3 m3 . After critical survey on the literature I found there is lack of ideas and suggestions on agitation of slurry inside  such mid-size digester (6-8 feet) .Many of Methods encountered on internet are practically not feasible. I request researchers to suggest for the the same.

Thanking you.

Biogas production

Design of biodigester

Both in small scale digester as well as large scale digester.

For Feedstock 1. Manure only 2.Manure mixed with straw, urine, and grasses.

Hi,

I would like to ask where I can get a dataset for an Artificial Neural Network I would like to build for the prediction of biogas yield and methane content. Ideally, I will require at least 500 cases.

I have searched many articles on databases, but so far I have been able to download only 1 dataset from the article (Modeling of biogas production from food, fruits and vegetables wastes using artificial neural network (ANN), Goncalves, et al, 2021)

The input data for my ANN will be: OLR (g VS/l.d), HRT, Temperature, pH, Reactor volume and the expected outputs are biogas yield (L/(g VS) and methane content (%).

Can someone please share some information as to where I can get a dataset for my project or if anyone would like to share the data from their experiments, it will be much appreciated.

Regards

W

what are the most needed devices or measuring device needed in a renewable energy lab. for education and research in

solar energy

biogas

wind energy

others

related to agriculture and agricultural engineering

-----

thanks in advance

I am starting to run a biogas experiment, but finding problem ordering the best lab equipment as most of what i see on the market is Chinese, and i seem not to trust Chinese stuff! so i need help locating the best apparatus for accurate results as am looking at publishing a paper out of the experiments.

dear all, does anybody knows the typical size and price of an anaerobic digester to be used for local purposes? what of we it would be used in a cattle farm?

Working for a research study on process optimization of anaerobic digestion where food waste is the main constituent.

Agricultural biogas plants require a certain amount of energy, both electricity and heat, to work and produce biogas. How can I quantify this value? Not considering the energy necessary to convert biogas into electricity (biogas is addressed to upgrading) and considering agricultural substrate (cattle manure, sillage, ... ).

Hello,

I just want to know what is the water content of digested cow dung after 30 days of retention time knowing that we add 1:1 water to the fresh dung?

I am working on Biogas production. The gas is formed. It supports combustion but it doesn't give blue flame that lasts.

How do I make it give a blue flame that is indicative of biomethane?

Hi dear researchers, I hope you are doing great. i need a model to predict biogas production from cow and hen manure and also the amount of digestate that remains at the end of anaerobic digestion procedure. i have studied more complicated models such as ADM1 but i am wondering how can i find the amount of the parameters used in this model. does anybody know the amount of these parameters and constants for this two manure types?

does anybody knows any simpler models that predict the amount of digestate as well?

I am looking forward to your responses

regards

We are going to buy a batch lab-scale biomethane/biogas potential instrument to measure biogas potential of organic waste. What would be your suggestion considering the limited budget of less than $7,000?

I am looking forward to hearing from you

As part of my ongoing project, I am trying to examine the biogas production through anaerobic digestion of vegetable oil. Due to the oil layer formation in the mixture, I doubt that all the bacteria of sludge are getting chance to degrade the oil layer. It might be better for me to use any reganet/ emulsifier to dissolve oil in water. Can anyone suggest a good emulsifier that I can use which won't create any problem for the anaerobic bacteria?

Laboratory Scale Experiments for Biogas Production from degradable solid waste. How can we collect it in an easy way and analyze its qualitative and quantitative properties?

Could you please share with us your latest scientific achievements (i.e. papers, books, etc) regarding anaerobic digestion technology? Your worthwhile findings would definitely respond to the need for "Engineers without borders" worldwide for tackling the energy crisis, especially in the Global South.

Plaese discuss about your achivements.

Hello, I am working on biogas production simulation on Aspen plus. So I have this one stream after hydrolysis in which I would like to change the mass fraction of certain components.

For eg, if the multiplication factor that I want to use is 1.5, then the previous concentration of ethanol after passing through this particular block should be multiplied by 1,5 now. Is this possible on Aspen using calculator blocks

I'm doing a research on the enhancement of biogas production using grass, chicken manure, cow dung and pig manure.I have attached the bottles with sample to a gasbag. So that afterwards the gasbag can be used to measure the volume of gas produced. I have repeated this experiment 3 times without succes. I have increased the mass and changed the temperature from mesophilic to thermophilic. After 32 days there is still no swelling of the gasbags. However in the lab near the gasbags there is a smell of gas production. 

We know HRT of fresh cow manure to produce biogas is more than 25 days(Ambient temperature around 30 degree centigrade) . But biogas can be produced in around 2-3 days during activation period (initial period of bio-digester activation). I installed the system, put fresh cow manure in the system and start to get gas in 2-3 days.

Does anyone have data or articles on carbon footprint for a whole lifecycle of a biogas plant? For other parts of lifecycle, i.e. feedstock, biogas production and so on, I can find easily. However, studies which would include also plant construction (and preferably demolition) are not available.

What is the best Artificial Neural Network (ANN) algorithm for biogas production optimization?

Is there a minimum data size for modeling implementation?

What is the best code to this such as SCILAB or Simulink?

Any idea how much N can be fixed in an aerated lagoon, assuming the DO is more than 2.0ppm.? Would it be advisable to add Nitosomas and/or Nitorbacter bacteria into the lagoon to increase the N fixation? The intention is like this. Incoming to the effluent pond has COD of 40,000ppm and BOD of 20,000ppm. CNP ratio is 300:5:1 already. I plan to bring down the COD/BOD using anoxic process, that is maintaining the DO at about 1.0ppm in a 10 day HRT lagoon. This will suppress biogas production (GHG). However, this process is a denitrifying process. So CNP ratio will be worse after the anoxic process. In the aeration process to be at optimum we need CNP at 100:5:1. Since aeration is a nitrifying process can I enhance the nitrifying process to bring the CNP nearer to 100:5:1 from the high of >300:5:1? How much N fixation can I attain in the aeration process in 10 days? Would it be enough?

How we can choose the best AD pretreatment methods for a given feedstock substrat in terms of biogas production and biodegradability rate and optimizing the costs?

I have used 15kg vegetable waste as substrate in the anaerobic batch reactor with 5 kg cowdung as inoculum and closed it .Even after 30days the biogas is not produced and the pH level is 4 .

how can i increase the pH , even if i increase the pH does biogas production starts ?

I made archaeal community analysis for samples from different anaerobic digesters for biogas production and get the results. I can not get any information abut this taxonomy :

d__Archaea; p__Euryarchaeota; c__Thermoplasmata; o__norank; f__norank; g__norank; s__Thermoplasmata archaeon enrichment culture clone A2-24

the relative abundance of this archaeon increased during my studies from 1.10% to 18.98%.

I could not get any information about it's metabolic pathway. could you help me?

thanks

The work is on biogas production. Found out that the gas produced extinguishes fire rather than igniting it.

Suggestions too on which substrates that would yield more of methane would be highly appreciated.

Could you suggest me a solution for generating methanogenic bacteria during the anaerobic digestion process? Shall I add cow manure to produce them? or addition is not necessary?

Thanks.

Dear all,

is it possible to calculate the amount of material digested in an anaerobic digester, knowing the starting feedstock and the amount of biogas produced?

Thank you in advance

Claudio

What are your thoughts about the equipment? Also, what was the average cost of the equipment?

Which kinds of biomass, byproducts and waste are the most interesting for new research development in anaerobic digestion and gasification?

I am planning a new set of AD experiments (agricultural waste as a substrate), and if I run a duplicate of my trials, I will have a total of 6 reactors (this seems a lot of work since I have to combine the experiments with other works), so I would like to know if it is acceptable to run 1 reactor for each condition of my experiment? are there literature where this has been done/justified? Thank you

I am running a reactor for the AD of agricultural waste, and unlike the BMP tests, I understand that the calculation of the biodegradability (efficiency of degradation) of the semi-continuous process is different. I am wondering how best to calculate the biodegradability, considering that I am feeding my reactors daily.

Respected Researcher,

I want to know about the personal experiences of those who are dealing with Anaerobic Digestion with a focus on "Biogas production".

1: How can we increase the Biogas production from the anaerobic membrane Bioreactors having "Synthetic Wastewater" as feed. The initial COD conc. of the Synthetic Wastewater is around 200 mg/L.

2: What could be a few possible factors overcoming/decreasing Biogas production from those AnMBRs?

Any examples, personal experiences, detailed descriptions/opinions are mostly welcome.

Best,

S.S.A. Shah

What is the relationship between optimal value, in terms of biogas production, and co-digestion ratio for two substrats? Is there any equation defining the relationship between the substarte composition and its optimal value?

Do you think that future research on this topic will be more oriented to the development of new approaches to biogas and syngas generation? Or the major challenge is rather the treatment of new kinds of feedstock?

I have waste water from palm oil mill which consists of about 3% dissolved solids only. Organic solids is about 70%. COD/BOD is about 30,000ppm and 15,000ppm. Can I used aeration biological process to bring BOD to 20ppm for discharge? Or do I need to go through the normal anaerobic, facultative and aerobic process to do that?

In the laboratory I have aerated this waste water and brought the COD down to about 3,000ppm within 21 days then it sort of get stagnant there. I have bioaugmentated the samples with facultative microbes to initiate digestion because the samples were sterile from source. People said I need to have the 3 biological processes like that in the effluent pond to bring down COD to 400ppm and BOD to 20ppm. Please provide your professional advise.

I am trying to use aeration to prevent biogas production and at the same time bring down the BOD as fast as possible to bring it to below 20ppm for discharge.

for ADM for biogas production from codegstion/

plz suggest any book so i can easily access software

I would like to ask and discuss.

Have anyone done research on the biogas production with additional of treatment using subcritical water technology? I have difficulties and confusion, as when I did preliminary experiments towards the treated and untreated material, according to hyphothesis should be the treated material produced the highest biogas production. However, the actual results were the opposite.

Did anyone encounter this type of findings?

Thank you.

Process parameter optimization for biogas production from lignin via Anaerobic Digestion is a lengthy process when DoE is applied to full scale processes - is there a possibility that laboratory scale experiments, over a much shorter period, could be conducted instead?

It would be appreciated if some guidance could be provided, and/or a direction to information or literature.

There is definitely energy production from all species waste. What kind of energy can we produce? Can it be used to sustain a building? How would we collect and process the waste? 

Most researches report a hydraulic time of 30 days and above in biogas production. Are there possible ways to reduce the HRT and also obtain more gas?

I have a question about biomass: in new Caledonia it could be possible to use biomass for biogas production, but because of the particular soil rich in nickel ores, the biomass contains high concentration of such metal. If the digestate was used as fertilizer, the soil used for agriculture would be heavily contaminated. Do you know if the biomass can be treated in advance for reduction of Ni and, if so, what technology can be used?

in our research, we reduce the lag phase of biogas generation(4-6 hours) and reached very early biogas production at high yield in a batch system (HRT=19 hours). how can I identify the microbial variety of inoculum? what do you consider as an important factor responsible for such early and high biogas production (y=460 ml/g vs)?

Hello RGians,

In optimization studies of biogas production, I could see pH and TS have used as independent parameters.

In actual practice, is it possible to set pH and TS of feed to required value?

I think adjustments in one parameter also changes other parameter (in case of TS and pH).

Could you please explain the practical method of fixing pH and TS as per a an experimental design?

What should be the ratio of co-substrate dilution for the preparation of slurry to get optimum results for biogas production? What other diluting agents can be used in place of water or urine?

Slurry left after the production of biogas still having some of the heavy metals in it. Should it be dumped ?

Will it affect the soil again? Can it be utilized as Fertilizer?

What will be range of fresh cow dung COD in term of biogas production from these substrate.

Im chemical enginI am a chemical engineer and my research project is the production of biogas with whey. And my work is in the first phase a proyect i work is biogas production whit lacto serum and the proyect is in a first phase

I am currently carrying out a research project on biogas production and using a GC Agilent 7820A to test for gases.

I am using a cappillary column GasPro 30m * 0.32mm and it is not giving me satisfactory results, and there is also an issue of large retention times accompanied by this column. With your expertise, please assist me with this predicament at hand on the choice of a column suitable for gas characterisation. From the inforrmation i gathered, the use of molecular sieve Poropak Q 2m* 2mm column(or in that close range) would give me better results.

i would also apprciate if you could further advice on this decision i am making.

Your assistance and cooperation will be greatly appreciated.

When producing biogas from a semi-solid or liquid substrate, water is added to dilute it. The slurry dilution factor actively affect the biogas production, as higher water content may dilute the decomposer cells and enzymes per unit substrate, which is bad for the process .

So, my question is that what is the best slurry dilution factor for biogas production anaerobically using cattle manure, where I can achieve maximum biogas yield?

Do we use fresh sludge from the another digester that is in the same place to fill? Does the active sludge get ready for another refinery?

Do we use animal manure or another combination by active sludge for the initial loading of 6000 digester? If yes, how many percent of cow manure and a few percent activated sludge?

How to fill the 6000 m3 digester first time? When we fill the digester, how much time should we consider the initial sludge for the first time?

I understand its difficult to ferment Lemongrass without treating it. What are the available methods to pre-treat in 3days

I'm a student in the final year of my M.Sc in Environmental Engineering. I want to work on a project focused on the feasibility of using the combined advanced oxidation and biological processes to treat highly contaminated petroleum refinery wastewater.

I want to ask you to borrow me about 10 minutes of your time and answer my question. Is anyone able to help me with this?

What topic can I use for my thesis?

Any prospective leads and suggestions would be highly appreciated.

Thank you.

Saeed Molaei

what are the suggestions for a research topic in that field.

Before start a new project I need to have a preliminary, basic view on a mixture of potatoes and sugar beet to be used as a substrate for anaerobic digestion. Does anybody has any experience or research papers on this topic? Also, I need to know which kind of Nitrogen-rich co-substrate is most suitable to adjust the C:N ratio and which type of inoculum (manure or fermented slurry). Thank you.

Dear all,

If fungi/mold containing grain (let's say barley grain) were about to be digested, how would fungi/mold affect digestion performance? Will it inhibit or will it stimulate the digestion at full scale?

how many full-scale anaerobic digesters for biogas production and wastewater treatment are there in the world (continent or country wise)?

Looking for a collaborative hand to do large scale Biogas production from Sargassum (Brown Seaweed). I have identified and isolated Biogas from Sargassum long before. I can send you ppt and the video for your reference. After the anaerobic digestion the liquid extract can further fortified with lactobacillus to use as a liquid Biofertilizer.

So please i kindly request you to consider my request and hope you will do me the best.

We are a Seaweed company working abundantly with Seaweeds like Kappaphycus, Sargassum, Gracillaria (Salicornia). So i would like to use this Biomass for producing Biofuels - Economic importance for future.

Looking forward to hear from you.

Regards

Srinivasan.S

Microbiologist

Aquagri Processing Pvt. Ltd

Iron oxide nanoparticles can be added as an additive (as a nutrient) in anaerobic digestion to enhance biogas and methane production.. My question is: whether the nanoparticles will be added at the start of the process or during the process?

There are lot of enzymes and different methodologies were used to treat the micro-algal biomass to improve biogas production. However, we need which enzymes and methodology gives good results at laboratory.

Both Fe2O3 and Fe3O4 release iron ions in digester. But Fe3O4 is used more than Fe2O3. What is the reason behind this?

For lab scale batch study, water displacement method was utilised to measure biogas production per day. But how do I measure biogas production per day in a pilot scale continuous reactor ??

What are the efficient, cost effective, highly stable catalysts are used in Catalytic Liquefaction to produce Bio-Oil?

Is Bio-Oil is suitable for biogas production by anaerobic digestion?

How to recover catalysts used in Catalytic Liquefaction process? How much is the recovery in per cent?

This equation is used for assessing the biogas production by anaerobic digestion.. Kindly help me... 

Assuming external heating source is not desired, and the digester is made of high density plastic material, located above the ground.

what method should be adopted in temperate and tropical region respectively?

I need some statistical informations about how often Salmonella spp. occurs in post fermentation residues in german biogas plants. Reffering to European Biogas Association in 2015 there were almost 11,000 biogas plants working. According to european legislation post fermentation biomass have to be examined if contains any Salmonella. How often Salmonella is isolated from post fermentation residues?

I will be gratefull for any publications.

The hydrolysis phase of the biogas production process includes the degradation steps of macromolecules to the individual components and finally to fatty acids, CO ₂ and H 2 , but also various intermediates. In these degradation processes, a variety of microorganisms is involved or the degradation takes many steps or reactions.

The products of the hydrolysis phase are a substrate for the methane formation by methanogenic bacteria or archaea. For scientific investigations of a double-stage biogas process, which focused on methanation stage, is it possible to prepare a substrate in the lab instead of operating a hydrolysis stage? 

I will appreciate ideas/ suggestions on construction of a good lab anaerobic digester for effective biogas production and measurement, microbial analysis and physicochemical analysis. Also the type of material to use for it. We don't have funding and we are working in a very remote area. Thanks

Lots of work have been done using different substrates in biogas product ion and optimization. Are there still new things to research in this area to help in turning waste to wealth and energy and also save the globe from serious implications of climatic change as regards to methane production. Thanks

Hello guys

I m trying to do species transport to my problem. I chose mixture-template for my reaction and also I defined my needed material. But in the mixture-template dialogue box when I am trying to add my material and remove N2, O2 and H2O (the default ones), I cannot remove them (I can add) and it shows me this error: "Species n2 is used in one or more reactions." for example when I m trying to remove n2 from my mixture. If someone have any experience plz help me.

Hi,

I am doing batch experiments for certain substrates to evaluate the effect of various parameters such as co substrate concentration, total solids, temperature on bio gas production through optimisation of parameters.

Can inoculum concentration affects cumulative biogas yield or not?

I am trying to see the best way to design a mini Biogas system for domestic use in a Rural context, any advice(feedstock: organic waste & sewage etc.)

the issue idea is to have

-few moving parts as possible

-decent yield

-no artificial source of heat 

-size of digester about 50 to 100 litres (just ti have a small footprint) 

 if possible a chat to evaluate various feed stocks (human waste etc)

Since chicken manure is rich in nitrogen so high concentration of manure can lead to ammonia toxicity. 

for using sawdust as substrate for biogas production