This is a guide that shows only a few ways in which H2O Building Services can help you reduce your company's sewage and water costs.

1. .
Abridged Project Methodology
15th October 2013
Graham Mann
H2O Building Services

2. Current Situation
An assessment or audit of the waste water being
generated is the most important starting point for any
project.
This is split into two categories:
1. Discharge consents to ensure compliance is being
achieved – typically flow, pH, oils and grease, solids,
COD, phosphate, ammonia, heavy metals etc
2. Data regarding chargeable components – flow,
solids and COD only for the MOGDEN formula
Typical charts can be seen on the next pages

3. Graph to show weekly flow rate / m3
14000
Flow (m3) BROOK ST. PR
Flow (m3) BROOK ST. PA
Flow (m3) NO.1 BREWERY
12000
10000
8000
6000
4000
2000
0
0
20
40
60
80
100

4. Graph to show weekly average COD / mg/l
8000
Cumulative Average COD (mg/l)
BROOK ST. PROCESS
Cumulative Average COD (mg/l)
BROOK ST. PACKAGING
7000
Cumulative Average COD (mg/l)
NO.1 BREWERY
6000
5000
4000
3000
2000
1000
0
0
20
40
60
80
100

5. Graph to show weekly Suspended Solids / mg/l
1600
Cumulative Average SS (mg/l) BROOK ST.
PROCESS
Cumulative Average SS (mg/l) BROOK ST.
PACKAGING
Cumulative Average SS (mg/l) NO.1 BREWERY
1400
1200
1000
800
600
400
200
0
0
20
40
60
80
100

6. Effluent Treatment
1. Physical
Filtration:
Traditional wedge wire screens
minimum solid capture = 1 mm
Revolutionary Ogden Water FilSys
minimum solid capture = 50 microns
Settlement:
Heavier material sinks to the bottom
Flotation:
Less dense material floats to the surface

7. Effluent Treatment
2. Chemical
An enhancement of physical separation.
Chemicals can be used to:
Increase the chances of capture by binding particles together
Increase the density of the particles through chemical binding
Use of chemical treatment to
encourage binding of solids to
air (micro bubbles) for
enhanced flotation
(Dissolved Air Flotation)
Ogden Water
Ltd.

8. Effluent Treatment
3. Biological
Simple forms of bacteria are used to eat the organic material present in the
wastewater.
Through their metabolism, the organic material is transformed into cellular
mass, which is no longer in solution but can be precipitated at the bottom of
a settling tank.
The water exiting the system is therefore much cleaner.

9. Effluent Treatment
Reasons to treat:
Compliance
Cost saving
Water re-use

10. Example Effluent Treatment Projects
Physical – Filtration System plant:
1,200 m3/day of effluent
COD 1,500 mg/l
Solids 2,000 mg/l.
Budget £120,000.
Chemical – Dissolved Air Flotation plant:
480 m3/day of effluent
COD 4,500 mg/l
Solids 1,000 mg/l.
Budget £80,000.

11. Effluent Treatment
Biological – MBR plant with RO for water recovery:
400 m3/day of effluent
COD 2,500 mg/l
Ammonia 200 mg/l.
Budget £1m.
Recovered water = 300m3/day
If greater than 40% is recycled, there is access to grant funding and the
possibility of enhanced Capital Allowance to be claimed.

12. Project Methodology and Work Schedule
24 hourly sampling and analysis programme
Laboratory test work – solids removal and effect on COD, pH correction
Budget quotation – funding available, timescales involved etc.
Full draft quotation
Visit to reference sites
Presentation, discussion meetings to finalise the quote
Design, build, install
Service, support and continuous improvement

13. To find out how we can help you reduce
your water and sewage costs, please get in
touch with H2O Building Services http://www.h2obuildingservices.co.uk/
Call us at: 0845 658 0948