Green Drop Compliance in Johannesburg

1. Green Drop Compliance in Johannesburg Etienne Hugo General Manager: Operations Johannesburg Water (Pty) Ltd

2. Presentation • Introduction to Johannesburg Water. • Objectives of sewage treatment. • Factors affecting “green drop” compliance. • Consulting Engineers appointments. • Process Controllers and Maintenance. • Capital and Operational expenditure. • Conclusions.

3. Johannesburg Water (Pty) Ltd • Johannesburg Water (JW) was established in January 2001 by City of Johannesburg for the delivery of water and sanitation services. • JW manages, operates and maintains 6 wastewater treatment works. • In 2009, the works produced 260 dry tons of sludge per day. (1550 m3 / day at 17% dry solids concentration)

4. Treatment Works

5. Objectives of Sewage Treatment • To produce an effluent quality that fully complies with the licence conditions at all times. • To treat and dispose of sludge in compliance with the 2006 “Guidelines for the utilization and disposal of wastewater sludge”. • To ensure that the above operations are cost effective, affordable and sustainable. • To maintain safe and healthy working conditions. • To prevent raw sewage overflows from entering streams and rivers. .

6. Green Drop Compliance Factors affecting “green drop” compliance • Appointment of consultants. • Process Controllers. • Maintenance. • Opex and Capex. • Conclusions.

7. Consulting Engineers Consulting Enginners requirements: • Experience in designing for your licence conditions. • Experience in designing for local conditions. • Implementation of successful designs under the above conditions.

8. Consultant / Client • Assess clients experience with various processes. • List available processes that attain required results. • Input from client / operational staff on process selection. • Implement successful designs. • Select proven mechanical equipment. • Keep the whole process simple. • Are existing staff able to operate and maintain the proposed design?

9. Process Controllers All treatment processes require some level of technology: • Education must meet level of technology selected. • Process controllers must be committed to attainment of objectives. • Train in-house and only for needs. • Give opportunity to develop skills.

10. Maintenance • Implement a simple but effective maintenance programme. • Outsource repairs to agents.

11. Capital Expenditure Capex used for new, replacement or major refurbishment of equipment. • Require a five year plan for the above. • Five year plan split into annual capital expenditure.

12. Operational Expenditure Targets must be set for high cost areas such as power and chemical consumption, salaries etc. • Annual operational budget developed from previous years performance. • Consider cost increases for power, chemicals, salaries etc. • Carefully monitor expenditure.

13. Conclusions • Carefully select consultants and ensure clients input into decisions made. • Education, commitment, specific training and opportunity to develop cannot be substituted one for the other. • Implementation of a simple maintenance programme is essential. • Repairs to mechanical plant should be undertaken by the agents. • Sufficient Capex and Opex must be made available for successful operational and maintenance performance.

14. THANK YOU FOR YOUR ATTENTION.