What is MLSS and MLVSS | Sanjeet Rawat |

What is MLSS and MLVSS | Sanjeet Rawat | ‪@ETPKnowledgeJunction‬
#nurtureflora #wastewater #viralvideo
Hello guys... in this video you will know that what is mix liquid volatile suspended solids and mix liquid suspended solids, the difference between both. You will know the desirable range of MLSS in an aeration tank and the ratio in between mlss and mlvss.
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MIXED LIQUOR SUSPENDED SOLIDS
Mixed liquor suspended solids (MLSS) is the concentration of suspended solids, in an aeration tank during the activated sludge process.
Suspended solids- microorganisms and non-biodegradable suspended matter.
Measurement unit- milligram per liter (mg/L).
Importance- To ensure that there is a sufficient quantity of active biomass available to consume the feed quantity of organic matter at any time; the food to microorganism (F: M) ratio.
Good F: M ratio- The biomass will consume high percentages of the food means, more biomass- more consumption of organic matter (BOD).
2 mg/L BOD or lower, is considered to be clean, and safe to discharge to surface waters or to reuse.
The total weight of MLSS in an aeration tank = MLSS (kg/m3) x aeration tank volume (m3).
MIXED LIQUOR VOLATILE SUSPENDED SOLIDS
The Mixed Liquor Volatile Suspended Solids (MLVSS) is the part of the MLSS which is actually digesting the organic matter (COD & BOD).
The volatile solids concentration or MLVSS is can be used to determine whether there are enough microorganisms present in the aeration tank to purify the water.
HOW MUCH MLSS TO BE MAINTAINED IN AERATION TANKS?
Factors that affect the concentration of MLSS:
The MLSS will vary based on the sludge age, nature of wastewater (BOD/COD value), incoming solids, ambient conditions, and the size of the aeration tank.
Desirable range:
MLSS around 3,000 mg/l and SVI = 100 to 200 ml/g
 Produces clear and good-quality effluent i.e. sludge forms a uniform blanket and captures more particles before settling.
SVI = 80 ml/g or less
 Rapid settling characteristics. TSS & MLSS will be higher. (MLSS would be around 4000 mg/l).
SVI = 250 ml/g or higher  Cause poor settling and poor compaction of settled sludge (filamentous sludge bulking as well). MLSS would be around 1000 mg/L.
RATIO OF MLVSS & MLSS
The ratio of MLVSS/MLSS should be greater than 0.75 in a conventional wastewater treatment system.
For example:
MLSS= 3,000 mg/l
Ratio= 0.75
MLVSS/ MLSS= 3,000 x 0.75
MLVSS= 2,250 mg/l
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Tags
#activated_sludge_process
#what_is_activated_sludge_process
#effluent
#sewagetreatment
#MixLiquorSuspendedSolids
#effluenttreatment
#aeration
#wastewatertreatment
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[@AnkitYadavvolgs.04]

Good ❤

[@SubodhAchrekar]

Sir, how to ascertain MLSS or MLVSS if we just know sludge settling ml/ltr? e.g. if Sludge Settling is 30% i.e. 300 ml/1000 ml how much will be MLSS/MLVSS mg/ltr. As it is very essential in case we don't have lab facility on site or plant. Made seperate vedio on this.

[@ETPKnowledgeJunction]

These values are somewhat related but not directly linked. MLSS is a measure of the amount of solids in the tank. The SV30 is a measure of the volume to which those particular solids will settle in 30 mins. If you were able to maintain a fairly constant MLSS value over a long period of time, the SV30 value would tell you if settle-ability was improving or worsening.

[@SandeepKumarkendulewar]

Thaks sir mai Bihar se Sandeep kumar Rawat

[@ravipandit877]

Sir bod chemical prepared and role in bod chemical in bod process

[@Pramodrote]

Very nice explain 👌👌👌🙏

[@ETPKnowledgeJunction]

Thank you dear your comment..stay connected

[@rahulvishwakarma7638]

Sir aeration tank me foming bahut aa raha hai mlss - 600 ml/L hai aur ph - 7.50 hai fir bhi foming aa raha hai clerifire ka water bhi yellow colour ka ho gaya hai sir koi solution btayiye

[@ETPKnowledgeJunction]

Aapke aeration tank mein jo samasya (excess foaming aur water yellowness) ho rahi hai, uska mukhya karan low MLSS ho sakta hai. Aapka MLSS sirf 600 mg/L hai, jo ideal operation ke liye kaafi kam hai. MLSS ko 2000-3000 mg/L tak badhane ke liye aap kuch upay apna sakte hain: 1. Sludge Recirculation Increase: Secondary clarifier se sludge return ki matra ko badha sakte hain, taaki MLSS level mein sudhar ho. 2. Bio-culture Addition: Aap market se ready-to-use bio-cultures ya kisi dusre treatment plant se sludge import karke MLSS badha sakte hain. Saath hi, foaming ko temporary rokhne ke liye antifoam agent ka upyog karna ek samayik solution ho sakta hai. Nutrient balance aur influent load ka analysis bhi zaroori hoga. Join telegram group.

[@B.S.R.R]

Dijestar ke bare me btao

[@9327SanjayMishra]

Mlss vs svi me kya deffrence hai uska vidio banaye please

[@maheshvishwakarma2749]

How much cowdung and bioculter should be added in aeration tank and AHR USBR

[@ETPKnowledgeJunction]

Plz join telegram group etp knowledge junction and ask questions there..

[@rahulvishwakarma7638]

Sir anarobic ka bhi ph- 8.9 hai

[@jayantasingha2469]

Digester tank COD. 700 mg/l Aeration tank me. Kiu barjatahe tips

[@jitusain3967]

Dear sir, if mlss and mlvss ratio 1:1 then aeration quality good or bad ?

[@ETPKnowledgeJunction]

1:1 ratio pr aapke effluent kisi quality achi nahi aayegi..

[@jitusain3967]

@@ETPKnowledgeJunction An interviewer asked me, is this explained in any video?

[@ArunKumar-zg1ue]

Sir ,TSS se Jayda BOD kyu ho Raha hai STP plant me

[@abhimanyumahanta7079]

What will be the inlet effluent bod value.which you are considering as an optimum limit to maintain the mlss it's not yet determined i am telling you in practically.i have experience of more than 25 years in this field.the ideal biomass concentration should be maintained between 4000 and 5000 mgl depending on the different plant setup and treatment factor such as waste water characteristics especially on the raw effluent bod value.come to the main point the biological solid are measured in a lab procedure to determine the weight of solid the difference is the mlss is total solid weight and mlvss is the volatile fraction of the total solid usually just biological solid but can also include fibre and other organic infuent solid

[@ETPKnowledgeJunction]

Dear Sir, I respect your work experience in the field of wastewater management. I don't have that much experience, but the videos I make on the channel are based on the experience of people who have great experience in this field. I do research on any subject and conclude the results, and make videos on those conclusions. This topic is also a result of that conclusion. If you watch the video, I have mentioned that The MLSS will vary based on the sludge age, nature of wastewater (BOD, COD value), incoming solids, ambient conditions, and the size of the aeration tank. The value I have mentioned in the video is a desirable range of MLSS and MLVSS.

[@abhimanyumahanta7079]

@@ETPKnowledgeJunction you are very much right

[@samirnimbalkar7248]

Telegram group link

[@ETPKnowledgeJunction]

Just search etp knowledge junction in telegram

[@ravipandit877]

Anarobic tank 800kld. Anarobic clarifier kitne capacity ka hona chaiye.extra problem in Aeration tank

[@ETPKnowledgeJunction]

To determine the appropriate capacity of a clarifier for an anaerobic digester with a capacity of 800KLD (kiloliters per day), several factors need to be considered. The capacity of the clarifier should be designed to effectively handle the flow rate and solids content of the effluent from the anaerobic digester, ensuring efficient separation and settling of solids. The clarifier is an essential component in wastewater treatment systems, responsible for the separation of suspended solids from liquid effluent. It works by allowing the heavier solids to settle at the bottom while the clarified liquid is discharged from the top. The size and capacity of the clarifier are crucial to achieve optimal performance and meet the desired effluent quality standards. Several factors influence the determination of clarifier capacity: 1. Flow Rate: The flow rate of the effluent from the anaerobic digester is a primary consideration in sizing the clarifier. It is important to ensure that the clarifier can handle the maximum flow rate without causing hydraulic overloading or compromising its settling efficiency. The flow rate is typically measured in liters per day (L/day) or kiloliters per day (KLD). 2. Solids Content: The solids content in the effluent also plays a significant role in determining clarifier capacity. Anaerobic digesters produce sludge, which contains both organic and inorganic solids. The concentration of these solids affects settling characteristics and determines how much space is required for effective separation. 3. Retention Time: The retention time refers to the duration that wastewater remains in the clarifier, allowing sufficient settling time for solids to separate from liquid. Retention time is influenced by factors such as flow rate, influent characteristics, and desired effluent quality standards. 4. Design Criteria: Various design criteria, such as overflow rates, surface loading rates, and sludge loading rates, are considered when sizing a clarifier. These criteria ensure that the clarifier operates within its design limits and achieves the desired performance. 5. Effluent Quality Standards: The required effluent quality standards, as mandated by local regulations or project specifications, also influence the clarifier capacity. Stricter effluent quality standards may require larger clarifiers to achieve the desired level of solids removal. Considering these factors, it is challenging to provide an exact capacity for the clarifier without more specific information about the influent characteristics, desired effluent quality standards, and other design parameters. However, a general rule of thumb is to size the clarifier based on a hydraulic retention time (HRT) of 2-4 hours. This means that the total volume of the clarifier should be able to accommodate 2-4 times the average flow rate over that period. For example, if the average flow rate from the anaerobic digester is 800KLD, and a hydraulic retention time of 4 hours is desired, then the total volume of the clarifier should be approximately 3200 kiloliters (800KLD * 4 hours). It is important to note that this calculation provides a rough estimate and should be further refined based on site-specific conditions, influent characteristics, and project requirements. Consulting with wastewater treatment experts or engineers experienced in anaerobic digestion systems would be advisable to determine the most accurate capacity for the clarifier.

[@rachit0615]

Brother sulphate ka proses Btao

[@kaushlendrasingh363]

How to maintain mlss and mlvss ratio an aeration tank pl let me know

[@ETPKnowledgeJunction]

Watch activated sludge process video

[@maheshprajapati4019]

Aeration tank ka sludge halka hojaye to kya kare

[@ETPKnowledgeJunction]

When activated sludge becomes lighter and starts floating on the surface, it indicates a potential issue with the wastewater treatment process. Here are some steps to address this problem: 1. Identify the cause: Determine the underlying cause of the activated sludge floating on the surface. Several factors can contribute to this issue, including excessive growth of filamentous bacteria, poor settling characteristics of the sludge, or changes in the wastewater composition. 2. Evaluate operational parameters: Review and assess various operational parameters of the wastewater treatment plant. This includes examining the influent characteristics, such as organic loading, nutrient levels, and pH. Additionally, evaluate the aeration system, sludge age, and hydraulic retention time to identify any deviations from optimal conditions. 3. Adjust aeration and mixing: Proper aeration and mixing are crucial for maintaining a healthy activated sludge process. If floating sludge is observed, consider adjusting the aeration rate and pattern to ensure adequate oxygen supply while preventing excessive turbulence. Optimal mixing can help prevent filamentous bacteria from proliferating and promote settling of sludge. 4. Control filamentous bacteria: Filamentous bacteria are often responsible for poor settling characteristics and floating sludge. Implement strategies to control their growth, such as reducing hydraulic or organic loading rates, optimizing nutrient dosing (e.g., phosphorus), or using specific chemicals or biological products designed to inhibit filamentous bacteria. 5. Monitor and adjust solids retention time (SRT): The SRT is an important parameter that affects the overall performance of activated sludge systems. Adjusting the SRT by wasting excess sludge or increasing biomass retention can help improve settling characteristics and reduce floating sludge issues. 6. Consider chemical addition: In some cases, adding chemicals can aid in resolving floating sludge problems. Chemicals like coagulants or flocculants may enhance floc formation and settling properties of the sludge. However, careful consideration should be given to the potential impact on downstream processes and effluent quality. 7. Perform microscopic examination: Microscopic analysis of the activated sludge can provide valuable insights into the microbial composition and identify specific filamentous bacteria causing the floating sludge issue. This information can guide targeted interventions for controlling filamentous growth. 8. Optimize sludge wasting: Proper management of sludge wasting is essential to maintain a healthy sludge blanket and prevent excessive accumulation of solids. Regularly monitor and adjust the wasting rate based on settled sludge volume, biomass concentration, and observed settling characteristics. 9. Consider process modifications: If the floating sludge issue persists despite adjustments, it may be necessary to consider process modifications or upgrades. This could involve changes in aeration system design, installation of additional clarifiers, or implementation of advanced treatment technologies like membrane bioreactors (MBRs). 10. Regular monitoring and maintenance: Continuous monitoring of operational parameters, effluent quality, and sludge characteristics is crucial for early detection of any issues related to floating sludge. Regular maintenance activities such as cleaning of aeration equipment, clarifiers, and other process components should also be performed to ensure optimal performance. It is important to note that the specific actions required to address floating sludge may vary depending on the unique characteristics of each wastewater treatment plant. Consulting with wastewater treatment experts or specialists can provide tailored solutions for resolving this issue effectively.

[@waqasahmad2609]

Sir aghr anaerobic plant 5500m3 ka hai tu aak tank mae water volume kitna ho ga

[@ETPKnowledgeJunction]

Mujhe sawal samjh nahi aaya.

[@NeetuKumari-ft7cq]

UASB ke bare video banao

[@ETPKnowledgeJunction]

Ok

[@ShaktiSingh-wk5bz]

Sir ppm % nikalna bataiye

[@asifqureshi8450]

Suppose I m control aeration tank pH to 7.95 then I stop plant and check pH after 8hours then aeration pH 8.26 .plz guide me why areation pH increase.

[@ETPKnowledgeJunction]

Great observation...please watch HOW TO REMOVE AMMONIA FROM WATER video on KZbin channel etp knowledge junction. Your all concepts will be cleared.

[@AshokKumar-ug1by]

Sir ji SBR tank me require DO kitani hoti h

[@ETPKnowledgeJunction]

1.5 to 3ppm

[@jitjit5995]

How to reduce COD please suggest sir

[@ETPKnowledgeJunction]

You just have to follow the SOP at every step of plant process.🙂 And if you don't know the SOP just watch videos of ETP Knowledge Junction and follow me. You can join telegram group etp knowledge junction.

[@kuldeepdixit]

Mujhe testing sikhni hai please help me

[@ETPKnowledgeJunction]

You can watch KZbin videos also read IS Code 3025. Join telegram group etp knowledge junction.

[@vivekkumar-zv2fq]

Sir aapne ratio kaise decide kiya ? Ki 0.75 hi hona chahiye

[@ETPKnowledgeJunction]

Thanks dost... Jo bhi data aata h wo researchers k aadhar pr aata h. MLSS and MLVSS ka ratio h wo.

[@vivekkumar-zv2fq]

Sir agar apne ratio alag rakhe to kya hoga ?

[@vivekkumar-zv2fq]

Aur sir ye ratio ka data kaunse factor pe depend karta hai

[@ETPKnowledgeJunction]

Wahi jo video me bataya gya h...🤭

[@sunilwage1821]

Yiu didn't explain range for mlss only 3000mg /l mentioned

[@ETPKnowledgeJunction]

Hi sunil, I didn't get your question. Thanks dear stay connected ❤️

[@sunilwage1821]

Hi sir I mean to say that any criteria is there that minimum &,maximum value of mlss should maintained

[@ETPKnowledgeJunction]

Dear as I have explained in video the very lower and very higher limit of MLSS is not good for sludge condition and a value around 3k mg/l is good.

[@ravipandit877]

Aeration tank problem ploymer in Aeration tank

[@chandrakantparashar4075]

Agar vss 30% h to kya Kiya Jaye sir

[@ETPKnowledgeJunction]

Bacteria ki quantity badhani hogi... watch video " bacteria and wastewater " is video me bataya gya h ki kon kon se factors effect krte hn bacteria ko. Thanks dear stay connected ❤️

[@sonusingh-nc6yy]

I want to learn stp design. Please help me

[@ETPKnowledgeJunction]

You can join my paid classess.

[@sonusingh-nc6yy]

@@ETPKnowledgeJunction send the link

[@ETPKnowledgeJunction]

Paid classes ka koi link nahi h..wo course h

[@sonusingh-nc6yy]

@@ETPKnowledgeJunction ok. then how to I join

[@ETPKnowledgeJunction]

Share your requirements on mail. I'll send you course topics and quotation. [e-mail]

[@मराठीमुलगा-ह5स]

We couldn’t understand ,you just read it

[@veerabrahmaswamuluadapa9532]

Telugu language

[@ETPKnowledgeJunction]

Not possible friend.