1. ERWAT GREEN DROP PRESENTATION
By Mr L. Mathomu

2. INTRODUCTION
This presentation is aimed at addressing the GD approach / methodology that ERWAT is undertaking to maintain and achieve the green drop status in all its 19 plants
GD assessment focus
Green drop KPIs
Indicating the current status in all its 19 plants
Identifying the gaps and how to mitigate those identified gaps

3. APPOACH USED
Conducting both internal and external GD audit on a quarterly basis
Setting up green drop targets per plant – above 90%
Creating a healthy competition within the department – plant that achieved their set targets are awarded with recognition certificates of achievement and also braais
Engagement of all the stakeholders involved in achieving or attaining GD targets i.e. from general worker through to management and the council
Implementation of risk committee that focuses on the implementation of the W2RAP and also buy-in from the top management.

4. GD ASSESSMENT FOCUS:
Green drop assessment focuses on the entire value chain of the waste water business
Reticulation
Pumping
Treatment
Discharge

5. ERWAT WASTE WATER PLANTS
Drainage District
Treatment Facility
Liquid Treatment Technology
Sludge Treatment Technology
Design (Ml/day)
WW Quality
DD3
Benoni
Biological filters
Anaerobic digestion 16 12
Esther Park
Activated sludge & BNR
Via pipeline to Hartebeesfontein
0,45
13.5
Hartebeesfontein 63
Olifantsfontein
Anaerobic digestion, belt presses
105
Rynfield
Biological filters & Activated sludge 10
DD5A
Ancor
Activated sludge &BNR 34
Welgedacht
Belt presses, drying beds 85
JP Marais
Via pipeline to Welgedacht 15
Daveyton
Sludge lagoon
Jan Smuts
Aerobic digestion, drying beds
9,1
DD5B
Carl Grundling
Aerobic digestion 5
11.4
Herbert Bickley
18,75
Tsakane
Activated sludge
Gravity thickening
10,8
11.8
Heidelberg
Belt presses, open digesters 8
9.2
Ratanda
Drying beds
DD6
Dekema 31
13.4
Rondebult 20
11.1
Vlakplaats
Biological filters & BNR Activated sludge
Anaerobic and aerobic digestion 83
13.35
Waterval
Anaerobic digestion, DAF
170
13,4

6. GREEN DROP KPIs Process control and maintenance
Registration certificates, Manuals, logbooks and training
Wastewater monitoring programme
Operational and compliance monitoring
Sampling schedules, frequency and analysed determinants
Submission of water quality data
Submission to DWA and GDS

7. GREEN DROP KPIs Wastewater effluent quality compliance
Chemical, Physical and Microbiological Compliance
Wastewater quality risk management
Waste water risk Abatement plant (W2RAP)
Incident Register and management protocol
Local regulation
Bylaws and enforcement

8. GREEN DROP KPIs Wastewater treatment capacity
Wastewater Treatment Works Re-grading
Wastewater asset management
Audits
Water Use Authorisation, Civil, Annual ISO and Green Drop audits.
Audits are done internal & externally
Cumulative risk analysis
Assessment focusses on the wastewater treatment

9. Overall Scoring Cumulative Risk Analysis Green Drop Key to CRR Score
90-100%
Critical Risk WWTW
70-<90%
High Risk WWTW
50-<70%
Medium Risk WWTW
<50%
Low Risk WWTW
Key to Green Drop Score
90-100%
Excellent situation, need to maintain
80-<90%
Good status, improve where gaps identified
50-<80%
Average performance, ample room for improvement
31-<50%
Very poor performance, need targeted intervention
0-<31%
Critical state, need urgent intervention

10. GREEN DROP RESULTS Key to Green Drop Score Excellent
Performance summary
July 2016-June 2017
July 2017-Dec 2017 Q1
Q2, Q3 Q4 Q2
Jul 16 - Sep 16
Oct 16- Dec 16
Jan 17 - Mar 17
Apr 17 - Jun 17
Jul 17 - Sep 17
Oct 17- Dec 17
ERWAT
92,8%
88,5%
91,8%
90,6%
88,70%
89,08%
Drainage District 3
91,7%
87,8%
93,6%
92,1%
91,46%
88,99%
Benoni
89,7%
89,4%
87,7%
87,25%
91,04%
Esther Park
78,8%
94,0%
95,7%
94,2%
93,01%
89.22%
Hartebeestfontein
93,0%
85,2%
97,5%
96,0%
87,61%
Olifantsfontein
96,5%
79,7%
90,1%
92,2%
95,40%
76.24%
Rynfield
98,1%
95,5%
90,3%
94,00%
88,32%
Drainage District 5
88,0%
84,8%
86,1%
85,5%
84,04%
88,48%
Ancor
81,2%
78,1%
76,1%
75,7%
72,70%
79,50%
Carl Grundlingh
95,0%
87,3%
85,15%
88,10%
Daveyton
94,1%
91,2%
89,00%
96,90%
Heidelberg
90,7%
79,1%
78,4%
80,8%
83,10%
82,50%
Herbert Bickley
87,9%
85,3%
84,7%
82,8%
89,40%
90,20%
Jan Smuts
90,9%
77,4%
81,0%
78,90%
93,60%
JP Marais
87,1%
84,4%
94,30%
Ratanda
82,5%
92,5%
86,4%
93,3%
86,10%
Tsakane
92,6%
75,00%
79,10%
Welgedacht
82,6%
92,0%
76,2%
89,70%
91,90%
Drainage District 6
98,7%
95,8%
90,62%
89,77%
Dekema
100,0%
92,9%
95,9%
96,1%
91,06%
93,40%
Rondebult
98,3%
77,52%
74,73%
Vlakplaats
96,95%
92,69%
Waterval
97,7%
98,26%
Key to Green Drop Score
90-100%
Excellent
80-<90%
Good & can improve
50-<80%
Average

11. % Compliance Per Determinant
GREEN DROP RESULTS
Q2 2016/2017
% Compliance Per Determinant
%Physical Compliance
%Chemical Compliance
%Micro Compliance
%pH
%EC
%COD
%NH3
%NO3
%PO4
%SS
%E. Coli
ANCOR
100 9 86 99 96 39 49 80 72
BENONI 98
C. GRUNDLINGH 68 60 82
DEKEMA 85 88 87 97 94 93
DAVEYTON
ESTHER PARK 91 45 84
HARTEBEESTFONTEIN 59 12 69
HEIDELBERG 74 90 89
H. BICKLEY 92 95
JAN SMUTS 38
JP MARAIS
OLIFANTSFONTEIN 16 58 14
RATANDA
RONDEBULT 66 73
RYNFIELD 83
TSAKANE 63 43 78 71
VLAKPLAATS
WATERVAL
90 and above
80 to 89
70 to 79
Less than 70

12. GREEN DROP AVERAGAED RESULTS
Key Performance Area
Weighting KPA
Average DD3
Average DD5
Average DD6
Average Q2 for ERWAT
Process Control & Maintenance Skills 10 9
Monitoring Programme 15
Submission of Results 5
Effluent Quality Compliance 30 16 24 22 21
Risk Management 13 11 12
Local Regulation 4
Treatment Capacity
Asset Management 14

13. GREEN DROP RESULTS

14. GREEN DROP RESULTS VS WEIGHTED KPA

15. Summary, Recommendations & Identified gaps
Process control & Maintenance Skills
All regions are compliant
In some plants the O&M manual is not sufficient
Recommendation
Consolidation of the O&M manual is required with index page and cross referencing

16. Summary, Recommendations & Identified gaps
Monitoring Programme
Full score was achieved for the criteria
Submission of Results
Full score was achieved

17. Summary, Recommendations & Identified gaps
Effluent Quality Compliance
There are various effluent quality failures but process controllers together with plant managers can undertake required actions to improve compliance – Optimization of the process
Recommendation
Root cause analysis to be undertaken for all incidents and addresses through risk assessment process (W2RAP)

18. Summary, Recommendations & Identified gaps
Risk Management
Heidelberg, Ratanda and Lesedi LM are not part of the W2RAP process and this present huge risk
Recommendation
Improve alignment between WSA and WSP during risk assessment process

19. Summary, Recommendations & Identified gaps
Local Regulation
Treatment Capacity:
- Capacity challenges in some plants
- Re-grading of some plants
- Implementation of recommendations from the study
Asset Management

20. THANK YOU LETS CONTINUE TO BE WATER WISE & STRIVE TO CONSERVE THIS SCARCE RESOURCE