• Latest
  • All
  • News
  • Business

Activated Sludge Treatment Process – What Volume and Density Limits Are Ideal

Feb 5, 2018
What Is a PDF Virus?

What Is a PDF Virus?

May 17, 2022
The Ultimate Guide to TV Antenna Installation

The Ultimate Guide to TV Antenna Installation

May 17, 2022
How to create multiple email filters in ProtonMail free plan

How to create multiple email filters in ProtonMail free plan

May 14, 2022
6 Benefits of Outsourcing Your Business’s Design and Development Projects

6 Benefits of Outsourcing Your Business’s Design and Development Projects

May 13, 2022
How IoT, Autonomous Cars and Smart Cities Will Develop

How IoT, Autonomous Cars and Smart Cities Will Develop

May 10, 2022
Apple Virus Guide: How to Get Rid of a Virus on Your iPhone

How to transfer photos from iPhone to Computer

May 10, 2022
How Does Data Analytics Improve Security Systems?

How Does Data Analytics Improve Security Systems?

May 4, 2022
Discovery Phase For Software Development: How Much Does It Cost?

Discovery Phase For Software Development: How Much Does It Cost?

May 4, 2022
Smart Contract Programming Languages in Blockchain

Smart Contract Programming Languages in Blockchain

May 4, 2022
How Does an Elasticsearch Application Work?

How Does an Elasticsearch Application Work?

May 3, 2022
How To Take Care of Files on Your Computer

The Many Benefits That External IT Support Provides For All Businesses.

May 2, 2022
In Order To Avoid Business Downtime – You Require IT Consulting

In Order To Avoid Business Downtime – You Require IT Consulting

May 2, 2022
  • Guest Posts
  • Advertise
  • Contact Us
  • Privacy Policy
Wednesday, May 18, 2022
Tech Featured
  • Home
  • Latest Tech
  • Apple
  • How to’s
  • Apps
  • Automobiles
  • Gadgets
  • Gaming
  • Reviews
  • Tech Tips
No Result
View All Result
Tech Featured
No Result
View All Result
Home News

Activated Sludge Treatment Process – What Volume and Density Limits Are Ideal

by techfeatured
Feb 5, 2018
in News
0
1
SHARES
28
VIEWS
Share on FacebookShare on Twitter

The activated sludge treatment process is a long drawn out process. During different stages of this treatment the volume of the dissolved and suspended particles have to be periodically calculated. In this article I discuss what volume and density limits are acceptable, and two indices that help in determining the actual volume and density of dissolved substances.

Sludge Volume Index (SVI)

The SVI tell us how good or bad the settling ability of the mixed liquor is. This settling is initiated only after the mixed liquor has been aerobically treated. Technically it is the volume of the settled activated sludge in a period of 30 mins. during the settling stage of the activated sludge treatment process. This volume is expressed in milliliters. If the volume of settled mass is low after 30 mins. then it is considered good. But if the SVI is of a high value, for example about 100 then it is believed that there is a high content of suspended and volatile solids. This is also believed to cause problems in the later stages of treatment. For most part, the activated sludge wastewater treatment plant is operated at a SVI value between 50 and 75.

Thus it can also be used to check the quality of the sludge. If a settleometer (size 1000 mL) is used to measure the volume of the settled solids then SVI refers to the volume of 1 grm of solids in the sludge settled during the period of 30 mins. The formula used for the sludge volume index calculation is as follows:

SVI = (Settled sludge volume in mL/L after 30 mins. * 1000) / (MLSS, mg/L) = ml/gram

Sludge Density Index (SDI)

The SDI is used in a manner that is similar to the SVI, to determine the settling ability of the sludge. But the calculation used differs slightly from SVI. Here’s how SDI is calculated:

SDI = (MLSS % * 100) / (% Volume occupied by MLSS after 30 mins. settling)

While calculating SVI, the volume obtained after a period of 30 mins. is divided by MLSS, it is the reverse in calculating SDI. While SVI is preferably kept in the range of 50 to 75, during operation of the activated sludge treatment process, the SDI values are kept between 1.0 to 2.5. It has to be noted that SDI has an inverse relationship with SVI. Hence where low SVI values are considered good for settling, sludge that has high SDI has better settling ability.

Tags: ActivatedDensityIdealLimitsProcessSludgeTreatmentVolume
ShareTweet

For any queries, you can reach us at [email protected]

Latest Posts

  • What Is a PDF Virus?
  • The Ultimate Guide to TV Antenna Installation
  • How to create multiple email filters in ProtonMail free plan
  • 6 Benefits of Outsourcing Your Business’s Design and Development Projects
  • How IoT, Autonomous Cars and Smart Cities Will Develop
Tech Featured

© 2022. All Rights Reserved.

Navigate Site

  • Guest Posts
  • Advertise
  • Contact Us
  • Privacy Policy

Follow Us

No Result
View All Result
  • Home
  • Latest Tech
  • Apple
  • How to’s
  • Apps
  • Automobiles
  • Gadgets
  • Gaming
  • Reviews
  • Tech Tips

© 2022. All Rights Reserved.