CHALK FOR OPTIMIZATION OF INDUSTRIAL AND MUNICIPAL WASTEWATER TREATMENT PLANTS
Product range based on natural calcium carbonate
CHALK to optimize floc formation, nitrification, acid capacity and sludge conditioning
The use of chalk products is ideal for systems with
poor settling properties
insufficient floc formation / floc decay
turbidity in the effluent
low acid capacity
problems with filamentous bacteria
low Ca/Na ratio due to industrial wastewater
disturbed Ca/Na ratio (municipal wastewater treatment plants especially during winter months)
With the addition of chalk products, the system can be balanced and the process performance can be sustainably optimized.
Practical case studies
CONVINCING ADVANTAGES WITH CHALK
What to expect when using CHALK
CONVINCING ADVANTAGES WITH CHALK
System balance
Stabilized flocs and improved floc formation
Chalk provides the calcium important for flocculation, which is directly available to the floc-forming bacteria due to the incorporation of the chalk particles into the flocs.
In combination with iron, chalk forms a stable floc framework, that improves the strength of the flocs.
Improved nitrification
The chalk particles embedded in the flocs stabilize the pH value, which causes nitrifiers to intensively attach to the chalk particles in the flocs.
The close association of ammonium-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) has a positive effect on nitrification.
Increased acid capacity
The acid activity rises with the Ca-content the activated sludge and so does the stability against to pH changes.
Reduced filamentousness
Filamentous bacteria are increasingly incorporated into the compact flocs. As a result, the filamentous bacteria lose their negative effect on settling behaviour, but retain their good degradation performance.
CONVINCING ADVANTAGES WITH CHALK
Comprehensive support
Before deciding on a chalk application
- Extensive system analyses of the plant
- Water analysis
- Microscopial examination of activated sludge
- Selection of the optimal chalk product for your application
- Recommendation of the dosing quantity/dosing point
- Dosing system for operational test
During the chalk application
- Supervision by our application specialists
- Regular analyses of water and activated sludge
- Adjustment of the chalk dosage, if necessary
- Special analyses possible:
- Gen probe analysis and nitrifiers
- Activity tests
- Nitrification performance
CONVINCING ADVANTAGES WITH CHALK
Simple dosage
Cost-effective and efficient
Chalk products are dosed:
dry as powder
from the BigBag or from a storage silo
directly into the activated sludge or the return sludge
intermittent dosing is also possible (eg.g. once a day, twice a week etc.)
Chalk
does not cause clumping
is not classified as dangerous good
is an all-natural product
cannot be overdosed
Our chalk range includes products with different grain sizes for precise adjustment to your requirements.
Support
Would you like to find out more about CHALK products?
We are happy to advise you!
Please fill out the contact form below and one of our experts from our Business Unit Environmental Engineering will contact you directly.
