What is Volatile Fatty Acid & Alkalinity | Sanjeet Rawat |

What is Volatile Fatty Acid & Alkalinity | Sanjeet S Rawat | ‪@ETPKnowledgeJunction‬
#nurtureflora #wastemanagement #wastewater
Alkalinity and VFA is a very important test that gives information about the health of an anaerobic digester. With this test, we get to know the problems that may come in the near future, whereas by the time the problem is detected with the pH imbalance, it is too late.In any well functioning anaerobic digester, two groups of bacteria work together to degradade organic matter. Saprophytic bacteria or acidogens and methane formers or methanogens.Both groups of bacteria do different things but work for each other. If their is loss of coordination, then problems will start coming in the digester.saprophytes, they hydrolyze complex organic compounds and convert them into simple organic compounds. among these short chain fatty acids, acetic acid, propionic acid and butric acid these acids are called volatile fatty acids because they have nature of volatility at atmospheric pressure. As I mentioned earlier apart from the saprophytes there are also methanogens in the digester. Methanogens convert saprophytic waste, i.e. fatty acids into methane and carbon dioxide.In a stabilized and well-functioning disaster, methanogens convert fatty acids to metane as rapidly as they produced by saprophytes.Let us once again quickly understand who works, what and how. There are two types of bacterial groups found in digesters, saprophytes and methanogens. Saprophytes i.e. acid formers break down these complex organic molecules to form fatty acids and methanogens i.e. methane formers produce methane from these fatty acids.So before understanding this, we have to know that what alkalinity actually is ?
So the alkalinity or buffering capacity of a system is the ability of system's solution to prevent the massive pH change i.e., prevents the system from getting acidified. As the saprophytes break down the complex molecules, acids are released. this leads to a decrease in the pH of the system, and here the alkalinity of the system maintains the system's pH at an optimum range. So that methanogens can do their job properly. The volatile acids produced by the saprophytes dissociates and release hydrogen ions. and these free hydrogen ions gradually lowers the system's pH i.e., making the digester acidic. But the alkalinity of the system catchup these hydrogen ions and hand over to methanogens to maintain the pH. If the system becomes imbalanced, then the alkalinity starts dissipating gradually. And the pH of the digester starts falling. When the pH drops below 6.5, the methanogens are inhibited and the digester get out of control. Means pH drops rapidly. This is because the methanogens are not able to use the volatile acid effectively. And when the pH reaches 5, the saprophytes are inhibited and the digester becomes more acidic, and then no digestion process takes place. Methanogens have a very narrow optimum range for pH and temperature and also they reproduce much more slowly than saprophytes. Although saprophytes and methanogens never compete with each other, Rather they work together. But any situation that is favorable for saprophytes and not for methanogens lead the digester towards acidity. By monitoring the relationship between VFA and alkalinity, we can check whether VFA is increasing and alkalinity is decreasing. ph monitoring is a very old way of monitoring the digester, which is not quite right. Because a drop of 1 point in pH can disturb the alkalinity of the entire system And here then it will be difficult to bring the system back to normal. Because the change in VFA alkalinity relationship takes place long before the change in pH. The ratio of VFA alkalinity should be kept between 0.05 to 0.15 and if the ratio starts going outside the limit then understand that there is going to be a big mess.
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[@Callme_skm]

Thank you sir for this informative video 🙏

[@ETPKnowledgeJunction]

Thanks dear stay connected ❤️

[@pavithrasaligrama8527]

Very useful video sir. Can you please make One video on how to do VFA ALKALINITY test

[@sureshkalungenrizambia1826]

Very nice information Sir 👌👌

[@ETPKnowledgeJunction]

Thanks buddy ... stay connected

[@avinashmanve5876]

Please Explain about Senerio VFA Decreasing and alkalinity Increasing ,What effect on Reactor?

[@alisayyed2667]

Sir... Hamara CSTR hai..jiska VFA bahot jyada Badha hua hai .or filhal 4 month se digester ko Raw spent wash feed bhi nahi kiya..abhi bhi VfA as it is upto 13000 mg/lit hai... Kam karne ke liye upay bataye please please

[@awadheshkumarverma6158]

Hi sir anaerobic bacteria nutrients ke liye kon sa chemical use mein le

[@garhwaldiary5919]

Thank you so much for the amazing job and video❤️❤️❤️

[@ETPKnowledgeJunction]

Thanks dear ❤️

[@Callme_skm]

Agar vfa alk ratio bigad jaye to use kaise thik kare?

[@ManishKumar-jj5qg]

Excellent sir .. please tell me VFA Hho much is in MEE plant

[@ETPKnowledgeJunction]

???

[@SuperweldEcosolutions]

Really valuable information

[@ETPKnowledgeJunction]

Thanks sir.. stay connected, ❤️

[@sureshkalungenrizambia1826]

Please tell Organic loading Rate and Hydraulic Retention Time , Hydraulic Loading Rate also tell on 160,000 mg per liter Spent Wash COD for 1800 M3 Volume of CSTR Digester

[@ETPKnowledgeJunction]

HRT= vol. Of digester(m3)/ vol. Of feeding per day(m3)

[@swatichandra5372]

Very well explained sir,,🙏🏻🙏🏻

[@ETPKnowledgeJunction]

Stay connected 🤝

[@durgeshkumargupta3709]

Mai wait kr raha tha es video ki kyuki aap ne 1 video me kaha tha ki es video ko layenge Thanks

[@ETPKnowledgeJunction]

Thanks dost for your patience..💕 Actually bahut jyada der ho gai... But finally aa hi gai.. Thanks for your love and support.. stay connected.

[@willgoingtogoal9822]

Sir mere yaha uasbr h Jiska tss lagater Kam Ho raha h KyA Karu tss bad Jaye Becteria halka hota ja raha h

[@ETPKnowledgeJunction]

Dear friend, Please watch anaerobic digestion and alkalinity and VFA video on KZbin channel. You will get the answer, how to handle anaerobic digestion.

[@anoopyadav6931]

Sir vfa badne se cod bade gi

[@gulshansingh6471]

Plz plz ek video banaiye jisme VFA, COD, BOD, Alkalinity, TS,VS, lignins test, organic load test perform krne ka SOP explain kariye for biogas plant.... Whose raw material are cow dung, paddy straw, press mud..... Plz Jitna jaldi ho sake....

[@ETPKnowledgeJunction]

Dost lab na hone ke karan ye test perform krna mushkil hn but main koshish karunga ki ppt pr explain kru ye sb..

[@gulshansingh6471]

@@ETPKnowledgeJunction thank u, but plz kosis kriyega ki biogas slurry ke liye ho kuki in general test sb jagah h

[@anoopyadav6931]

Sir vfa value badne per cod value bde gi

[@ETPKnowledgeJunction]

Volatile fatty acids (VFAs) are organic compounds that are intermediate products of anaerobic digestion. They are formed during the breakdown of organic matter by anaerobic bacteria. Chemical oxygen demand (COD) is a measure of the amount of oxygen required to oxidize organic compounds in water. In anaerobic digestion, the concentration of VFAs can influence the COD. Generally, a higher concentration of VFAs indicates the presence of more readily degradable organic matter, which typically correlates with a higher COD. However, the relationship between VFAs and COD can be complex and is influenced by various factors such as the composition of the organic feedstock, the efficiency of the anaerobic digestion process, and the microbial community present in the system.

[@awadheshkumarverma6158]

When water Is too dark then how to check alkalinity

[@ETPKnowledgeJunction]

First filter out the sample with ordenary filter paper... Join telegram group.

[@awadheshkumarverma6158]

@@ETPKnowledgeJunction thank you so much

[@awadheshkumarverma6158]

@@ETPKnowledgeJunction sir

[@Callme_skm]

Sir digester ka temperature aur pH kitna hona chahiye

[@ETPKnowledgeJunction]

For an anaerobic digester, the ideal pH typically ranges between 6.5 and 8.0, with 7.0 being neutral. As for temperature, it's usually optimal between 95°F to 100°F (35°C to 38°C). These conditions foster the growth of microorganisms responsible for breaking down organic matter efficiently.

[@Callme_skm]

@@ETPKnowledgeJunction thank you so much sir

[@saveearth5850]

How many parameters check in UASB digester like pH, Alkanity, Temperature, Settling (SV), etc etc???

[@ETPKnowledgeJunction]

Hi... Anaerobic digestion process me apka alkalinity and VFA bahut hi jyada important hota h... Baki sb bhi hn

[@varshadongre4418]

Sir it would be helpful if u share the references

[@ETPKnowledgeJunction]

just google 😊

[@maheshprajapati5515]

VFA Testing lab process sir

[@faisalsalmani9035]

Dear sir... 1st take the sample of digester 50ml in beaker n then 1 ml H2so4 mixed.. After that,, dilution instrument (which made up of glss) this sample put up in dilution some min later we collect 100ml CH3COOH (become the prepared of dilution instrument) after that take the acitic acid in conical flsk and 2 -3 drops phenohthelen and titration with 0.1N NaOH... Calculate by this formula Tv*60000*0.1/32.5*50

[@faisalsalmani9035]

Where =60000 molecular weight of CH3COOH 32.5 recovry factor of sulphuric acid 50 which.... Take the sample in ml

[@ArchanaPawar-c9i]

Acetic acid quantity and normality please mention