The primary sludge from the pre-settling tanks contains a lot of cellulose (toilet paper). At Harnaschpolder wwtp the cellulose is to a large extend from the primary sludge removed by a STRAINPRESS®. Currently the strainpress material is transport to a pa

Toilet paper used twice?

Theme
Wastewater Treatment, Nutrient Factory

Summary
The primary sludge from the pre-settling tanks contains a lot of cellulose (toilet paper). At Harnaschpolder wwtp the cellulose is to a large extend from the primary sludge removed by a STRAINPRESS®. Currently the strainpress material is transport to a paid third party for processing. Research will be conducted on this material to see if this cellulose can be of used in the existing wwtp. This cellulose can likely be charged (cat- or anion) by an chemical/catalytic reaction. If this works, this product can likely be used as flocculant to improve the removal of organic suspended material in the pre-settling tanks. Likely the yield of biogas can increase because of the increase of primary sludge and maybe also a decrease of energy consumption for the aerobic biological process is achieved. Several tests are conducted and a feasibility study is done to obtain insight in sustainable and financial aspects.

Start of Research
January 2017

End of Research
June 2017

Researcher
- Han van de Griek
- Paul Hankinson (final internship Aquatic Ecotechnology)

Organisation(s)

- Evides Industrial water BV
- Delfluent Services BV
- Delfland Water Authority
- HZ University of Applied Sciences

Contact

Han van de Griek
0622568108
[email protected]