An innovative greywater treatment system for urban areas ... - SuSanA

3.4 SANIRESCH RESEARCH PROJECT AND MBR TECHNOLOGY IN GENERAL -
COMPARISON AND DIFFERENTIATION
The treatment of greywater within the SANIRESCH research project has role model
characteristics and enables the further use of treated greywater. The aim of this project is, to
get insights into decentralised wastewater treatment plants. The treatment plant in Eschborn
is equipped with a variety of devices to measure the performance of the pilot installation,
such as sampling taps. Due to the elaborate extra equipment and devices in the facility, a
one-to-one transfer of the installed plant to other projects is not advisable. There are major
differences between this pilot plant and a marketable MBR application.
Company HUBER SE carried out a fictitious calculation of a 4-star hotel in Berlin to
demonstrate the ecological and economic benefits of a greywater treatment plant (Paris,
2009a). To conduct the comparison and differentiation of prototype and serial plant, the study
of company HUBER SE was taken as a reference. The economic feasibility study of the
membrane bioreactor technology HUBER GreyUse® is equal to the plant installed in
Eschborn. In the fictitious evaluation of the 4-star hotel (capacity of 215 beds) in Berlin,
greywater from showers and bathtubs is treated for reuse as toilet flushing water. In Table 18
the main differences of the compared versions are presented.
Table 18: Treatment plant characteristics – Office building in Eschborn (HUBER SE, 2011a) vs. 4star
hotel in Berlin (Paris, 2009a).
Compared settings SANIRESCH project in
Eschborn
People served Approx. 190 employees 215 beds
Greywater streams treated Hand washing water, kitchen
sinks, dish washer
Amount of greywater
generated (m³/d)
Required space (minimum) Length: 2200 mm
Width: 1500 mm
Height: 2200 mm
Maximum treatment capacity
(m³/d)
0.6 8.5
1.26 7.5 *
Reuse (m³/d) 0.06 (cleaning of preceding
screen of treatment plant)
Energy consumption
incl. pressure rise (kWh/m³)
2.38
(detailed information in chapter
2.2.1 and appendix 0)
Economic issues (net) [€] 5,990
HUBER GreyUse®
unit (investment)
8,333
Pipelines
14,323 total
Maintenance 1x per year
Inspection and change of worn
out parts (time expense n. a.)
2x per year cleaning of
intermediate storage tank (time
expense n. a.)
4-star hotel in Berlin
Showers, bathtubs, hand
washing
Length: 5400 mm
Width: 2700 mm
Height: 2400 mm
7.5 (toilet flushing)
3.1 incl. pressure rise
33,089
HUBER GreyUse®
unit (investment)
18,000
Pipelines
51,089 total
1x per year
Inspection and change wear
parts (3 h/a)
43