SVI là gì? Vai trò của SVI trong xử lý nước thải

What is SVI? The role of SVI in wastewater treatment

News

26/07/2024

What is SVI?
SVI (short for Sludge Volume Index) is a sludge volume index commonly used to measure the characteristics of a mixture of sludge and water or activated sludge (unit is milliliters/gram). After calculating the SVI index, based on the SVI index, we can diagnose the "disease" of the aerobic tank sludge system.

How to calculate the SVI index:

In which:

MLSS: activated sludge concentration in solution, normally activated sludge in wastewater treatment plants often fluctuates from 50 to 150.

Application of SVI index:
After obtaining the SVI index, based on the SVI value, we can "diagnose the disease" of aerobic tank sludge:
SVI < 50 mL/g: potential pinfloc (potential for bran sludge floc).
50 < SVI < 100 mL/g: best.
100 < SVI < 150 mL/g: Filament growth (growth of filamentous bacteria).
150 < SVI < 200 mL/g: Bulking at high flows.
200 < SVI < 300 mL/g: Bulking (sludge that is difficult to settle).
SVI > 300 mL/g: Severe bulking.
Thus: SVI is best between 100 and 200 ml/g.

Note: The smaller the SVI, the faster and denser the sludge settles.

After knowing the “disease” of the sludge, each individual case will have a suitable treatment.

bichtram

Bài viết liên quan

Grease-treating microorganisms - effective treatment of clogged pipes

Learn about grease-treating microorganisms - the most effective solution for unclogging pipes today. Suggest some microbial preparations that are highly effective in treating grease.

14-10-2024

The most effective way to compost manure

Manure is an organic fertilizer from livestock and poultry manure, often mixed with straw. This fertilizer helps improve soil fertility, provide nutrients for plants, and improve soil structure.

26-07-2024

What is SVI? The role of SVI in wastewater treatment

What is SVI? SVI is the sludge volume index commonly used to measure the characteristics of a mixture of sludge and water or activated sludge (unit is milliliters/gram).

26-07-2024

What is a septic tank? Why periodically add probiotics to a septic tank?

Septic tanks are places that contain solid waste (such as feces, urine, grease, and some other organic waste, etc.) and this waste will be decomposed in the septic tank into liquid form.

26-07-2024

Wastewater treatment technologies

Scientists have found many advanced wastewater treatment technologies. Applicable to many different types of wastewater.

26-07-2024

What is anaerobic biotechnology? How does it work?

Anaerobic biotechnology is a method of using anaerobic microorganisms and facultative microorganisms to decompose organic and inorganic substances in wastewater.

26-07-2024

25-07-2024

Impact of excess oil and grease on the wastewater treatment system

Fats, oils and grease from cooking (vegetable oil, meat, milk) enter the drain through the sink, solidifying and causing blockages, broken drains and wastewater treatment problems.

25-07-2024

Operating principle of microbial fat treatment

The habit of pouring grease and leftover food directly into the sink repeatedly every day causes excess grease under the drain pipe to increase, combined with leftover food to clog the drain pipe.

25-07-2024

Bio powder turns dirty water into clean water in just a few minutes

Three-quarters of the world is covered with water, but less than 1% of it is usable water.Did you know that the percentage of "clean water" we use every day will decrease?

25-07-2024