1. Presented by: Josphat R. Mwandigha
INDUSTRIAL ECOLOGY TO MANAGE COOLING TOWER FILLS WASTE IN KENGEN OLKARIA GEOTHERMAL POWER PLANTS
Presented by: Josphat R. Mwandigha
2018 G2G INNOVATION SEMINAR, PRIDE INN SPA & RESORT
18TH JUNE - 22ND JUNE 2018

2. Diploma-Environmental Science
JOSPHAT R. MWANDIGHA
Natural Resource Management Technician, Resource Development & Infrastructure Department
Currently undertaking BSc. Environment, Conservation & Natural Resource Mgt.
Diploma-Environmental Science
Registered Environmental Impact Assessment Expert
Member-Conservation Leadership Program
6 yrs experience in energy sector
Area of interest- conservation and resource management

3. Presentation Outline Introduction Problem Objective Project concept1
Problem 2
Objective 4
Project concept 5
Risks and Opportunities 6
Conclusions and recommendations 7

4. INTRODUCTION Final disposal process of fills waste biggest challenge
Not all waste is waste
Industrial ecology - exchange of material between different industrial sectors
Co-processing-Use of waste as raw material, or as a source of energy, or both to replace natural mineral resources

5. PROBLEM STATEMENT
Cooling tower fills waste are hazardous and non biodegradable
Volumes of these wastes dumped in temporary holding bays-Olkaria
More expected cumulatively
Attempt to source licensed waste handlers have always hit a dead end
Few or no solutions available
Potential polluting Hells gate ecosystem

6. OBJECTIVES To contribute towards National waste management strategy
To promote sound management of cooling tower fills waste
To pursue opportunities which can be realized from waste management

7. PROJECT CONCEPT
Visited Lafarge Holcim- Bamburi cement factory Mombasa plant
Accept/refuse chart applies in selection of waste(source CPCB-India)

8. CO-PROCESSING AND INDUSTRIAL ECOLOGY CONCEPT
Source: GTZ Holcim guidelines

9. PREFERED WASTE MANAGEMENT SOLUTIONS
Source: GTZ Holcim guidelines

10. EXISTING SCENARIO Projected & actual waste from overhauls Plant
Projected (m3)
Date
Actual (m3)
Olk 11 unit 1&3
1420
N/A -
Olk 1AU unit 5
980
2017
Olk IV unit 2
Olk 11 unit 2
2012
150
2014
560
Olk 1AU unit 4
Olk IV unit 1
Totals
3,380
2,670
Source: Geothermal plant overhaul records

11. SCENARIO CONT Projected waste from wellheads Wellhead Fills (Pieces)
Volume
(m3)
OW-37
157(4.95 kg)
38.59
OW-39
157
OW- 43
118
29.00
OW-905
OW- 914
275
67.60
OW- 915
OW- 919
Totals
1,178
289.55
Projected waste from wellheads Source: Green Energy

12. RISKS AND OPPORTUNITIES
Heavy penalties due to non compliance
Risk of losing funding opportunities
Tainting of company image
Conflicts with stakeholders - KWS & community
Climate change impacts
losing ISO certification

13. RISKS AND OPPORTUNITIES CONT’
Collaborate with Bamburi Cement & Geo-cycle Co
Latter utilizes energy recovery technologies -incineration /co-processing -energy used in their cement kiln’s.
Ashes =clinker, raw material-cement-zero waste remains
Each participating firm benefit economically;
Reduced cost for waste disposal, efficiency resource use, improved environmental performance, enhanced image, improved relations with other industries
…………..Waste, taken as an opportunity

14. CONCLUSION
Co-processing considered best in waste management hierarchy
Responsible disposal
Zero residues and absorption of gases
Eliminate potential future liability
Triple win(WIN WIN WIN)

15. RECOMENDATIONS
KenGen geothermal to embrace industrial ecology
Trial runs of the target waste
MoU between KenGen, Bamburi cement and Geo-cycle

16. ….Health ecology is the basis for a health economy
JOH-KGN JvW-X1
….Health ecology is the basis for a health economy