Water and Wastewater.com Help Forums - Ask Tom! Article

Joseph Taylor

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Ask Tom! Article - Design of an UASB Reactor
May 18^th, 2005, 5:44am

Hi Everyone,

We have a new Ask Tom! Article,

Design of an UASB Reactor
a guest article by Dr. Makarand M. Ghangrekar of IIT.

You can read the article, here is the link:

http://www.waterandwastewater.com/www_services/asktom.htm

Comments, Suggestions and More!

If you would like to comment on the article or discuss UASB design, please feel free to click the "Reply" link above and post your comments here. Its a great way to let our author know what you think about his article!

Very Truly Yours,
Joseph Taylor
Water and Wastewater.com

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« Last Edit: Jun 09^th, 2005, 9:08am by Joseph Taylor »

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grrun

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Re: Ask Tom! Article - Design of an UASB Reactor
Reply #1 - May 18^th, 2005, 2:28pm

First, is this a typo? "In general, for temperature between 15 and 350C, the reactor can be designed for loading between 1.5 to 18 kg COD/ m3.d. Lower OLR should be preferred for low temperature and higher OLR can be adopted for high temperature." 35C seems reasonable; probably should be 35 degrees C because there is no degree symbol.

Because designers are usually evaluated on the capital cost of their designs, the comments about start-ups and maintenance concerns should be welcomed and carefully read by potential operators when reviewing consultant's design proposals. Also, it shows the need for good wastewater characterization as a necessary basis for design.
While I'm not a designer, I think that this article provides a good set of design parameters and practical information for this process.

grrun 8)

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« Last Edit: Jun 9^th, 2005, 9:09am by Joseph Taylor »

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Joseph Taylor YaBB Administrator Offline I love Water and Wastewater.com Posts: 153 Jacksonville Beach, FL Gender: Company or Organization: Water and Wastewater.com	Re: Ask Tom! Article - Design of an UASB Reactor Reply #2 - May 18^th, 2005, 2:56pm Hi Grrun, You are so correct, I have fixed the typo. It is 35 degrees C, not 350C. Thanks, Joe Taylor Water and Wastewater.com
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Tom Keenan - nesa God Member Offline Environmental Consultant - contact info@nesa.ie Posts: 2103 Gender: Company or Organization: nesa environmental consultants	Re: Ask Tom! Article - Design of an UASB Reactor Reply #3 - May 19^th, 2005, 3:34pm Glad to see this article being posted. Having read it when it was submitted I thought that it was very useful for anyone with an interest in this topic. A big thank you to Dr. Ghangrekar for his work on this article. Regards, Tom Keenan
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waters YaBB Newbies Offline WaterandWastewa ter.Com is the best! Posts: 42 Gender: Company or Organization: ZWZ	Re: Ask Tom! Article - Design of an UASB Reactor Reply #4 - May 20^th, 2005, 6:37pm Good article! Thanks! Further question is, is there any corelation between gas production rate, upflow velocity and inlet feeder service area?
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Joseph Taylor

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Re: Ask Tom! Article - Design of an UASB Reactor
Reply #5 - Jun 9^th, 2005, 9:13am

Hi Everyone,

Here is a comment that I received from Leo Habets of Paques BV that you might find of interest:

+++++++++++++++++++++++++++
The problem to get anaerobic treatment systems accepted in many countries is, that people with little design information received from an University market their ideas and convince customers to make a major investment in anaerobic treatment.

Unfortunately many technological and technical details are not tackled properly and the customer ends up with great dissappointments with respect to removal efficiency, biomass retention, corrosion, smell, operational cost etc etc. In fact the most successfull anaerobic plants are the products of only a handfull of very specialised companies, who have earned their position by at least ten years of experience in this business.

The guest article as such may help people to verify and understand the UASB reactor design of a certain supplier, but it should not lead to large scale do it yourself attemps.

Best regards,
Leo Habets
Specialist for Pulp and Paper Effluents
Paques BV
Balk, the Netherlands
L.Habets@paques.nl
+++++++++++++++++++++++++++

Your comments are welcome.

Joe Taylor
Water and Wastewater.com

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Ghangrekar_M.M.

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Re: Ask Tom! Article - Design of an UASB Reactor
Reply #6 - Jun 14^th, 2005, 5:48am

Dear Dr. Leo Habets

I express sincere thanks for the interest you have shown in the article "Design of UASB Reactor" on waterandwastewater.com and critical comments on the same.

I absolutely agree that, the design and subsequent start-up and operation of the UASB reactor are specialized job. This requires experience designers, to design the reactor suitable for that wastewater type, giving due consideration to the characteristics of the wastewater, and prevailing environmental conditions in the region, where the plant is to be constructed. The overall size and internal geometry of the rector will be governed by these parameters. I tried to emphasize the same in the article. However, based on the knowledge I have presented in the article, the full-scale reactors designed are functioning nicely for pharmaceutical and dairy wastewaters.

Similarly, the start-up and operation of the reactor requires, skilled manpower. Based on my research and field experience of operating particularly UASB reactor for the past 15 years (Lab-scale, Pilot scale and full scale) for different wastewaters, such as dairy, brewery, pharmaceutical, sewage, etc., I will strongly recommend trained operators for proper monitoring and operation of the system to utilize full advantage of the system. To solve this problem partially, I have developed software to provide offline guidance for start-up and proper monitoring of the reactor to keep operating parameters under stringent control to get maximum efficiency. Thus, semi-skilled person can operate the reactor to its optimum performance level.

Since, characteristics of the wastewater are different for different product, and for the same product wastewater characteristics are different for different industry, and accordingly, the problems that are likely to be faced during reactor start-up and operation will be different. Therefore, the software needs further database and continuous upgradation based on the data.

Many thanks to waterandwastewater.com to open a forum for discussion.

With Regards

M.M. Ghangrekar, Ph.D.
Assistant Professor,
Department of Civil Engineering
Indian Institute of Technology,
Kharagpur – 721 302. India

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« Last Edit: Jun 14^th, 2005, 7:11am by Joseph Taylor »

Makarand Madhao Ghangrekar
Associate Professor, Civil Engineering,
Indian Institute of Technology,
Kharagpur - 721 302
India
E-mail: m_ghangrekar@rediffmail.com;
ghangrekar@iitkgp.ac.in

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Skotte YaBB Newbies Offline Water and Wastewater.com is the best! Posts: 4 Company or Organization: SDSMT	Phosphate Content Reply #7 - Jun 17^th, 2005, 5:35am Hi, I am looking for some methodologies to determine the phosphate content in lake before and after precipitating the phosphate using Aluminium Sulphate.
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sobisch God Member Offline Posts: 1777 Gender: Company or Organization: L.U.M. GmbH	Re: Ask Tom! Article - Design of an UASB Reactor Reply #8 - Jun 17^th, 2005, 10:34am Dear Skotte, you should put your question forward as an extra topic!
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Re: Ask Tom! Article - Design of an UASB Reactor
Reply #9 - Jul 11^th, 2005, 3:18am

Hi everyone,

I had found a new method to produce granular,

the granular is releation with the UASB, my method

is do not in the usuall reactors inside, on the otherway

it is out of the reacrors,

I hope every fellows give me a good usefull indication,

weather there is this way to manufacture granular,

your comments are wellcome.

Sinagon

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Re: Ask Tom! Article - Design of an UASB Reactor
Reply #10 - Jul 11^th, 2005, 3:31am

Hi everyone
I add one notice, that I use half a year to study
more than 1000 or so articles which research the
anaerobic wastewater treatment technology, use
UASB, EGSB, IC or SBR, In these articles no one
mention the method I had found. I hope disscusion
this topic with everyone, perhaps my way is a new
potent.

With your regards.
Thanks.

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Re: Ask Tom! Article - Design of an UASB Reactor
Reply #11 - Oct 24^th, 2005, 5:08am

I have to consider the design of an anaerobic reactor to treat swine slaughterhouse blood. Although I have experience, I have few references on how blood will best be introduced, its relevant characteristics or the amount generated per animal.

I'm looking for any references to AD of blood, particularly in anaerobic SBR or UASB.

The request for details on the blood itself and best preparation for treatment in AD system will be verified at the facility. I'm hoping to gain some insight prior to exhaustive site analysis.

Regards,
D. Marioni, P.Eng. (Canada) :o

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