Tongaat WWTW Water Use Licence Application. Draft Report Meeting 1 October 2015

Transcription

1 Tongaat WWTW Water Use Licence Application Draft Report Meeting 1 October 2015

2 Agenda Welcome and purpose Public Participation Process Introduction ethekwini W&S Tongaat Waste Water Treatment Works A Water Use Licence Application (WULA) Draft Report Discussion Closure

3 Welcome and Purpose

4 Purpose of meeting Explain process and public participation opportunities To discuss the Tongaat WWTW Draft report (IWWMP and Aide Memoir) for Public Participation purposes Report To provide supporting information to the DWS in support of the Water Use Licence Application

5 Introduction Public Participation Opportunities

6 Public Participation Process of WULA for Tongaat WWTW The primary aim is to facilitate better decision making. Activities utilised in the public participation process towards the application of the WULA: Advertising: Public notice in local newspapers; Contacting stakeholders, notifying them of the process; Holding Public meetings to elicit comment and input; Documenting correspondence within the Draft Technical Report; and Notifying stakeholders when the Water Use License is issued

7 ethekwini Water and Sanitation

8 EWS Introduction ethekwini Water and Sanitation Engineering Services Scientific Services Customer Services Water Operations Waste Water Operations Mechanical and Electrical Waste Water Networks Works

9 Works Branch EWS Works Branch Structure Lower Umgeni Area Inland Area Southern Coastal Area Central Coastal Area Northern Coastal Area Water Works Research and Development Phoenix WWTW Verulam WWTW Genazzano WWTW Umdloti WWTW Umhlanga WWTW Tongaat Central WWTW

10 Tongaat WWTW Locality

11 Water Use Licence Outline of the requirements

12 A Water Use Licence Process Issued by DWS Relevant for Tongaat WWTW Required by sec 21of National Water Act No 36 of For the purposes of this Act, water use includes (c) impeding or diverting the flow of water in a watercourse; (f) discharging waste or water containing waste into a water resource through a pipe, canal, sewer, sea outfall or other conduit; (g) disposing of waste in a manner which may detrimentally impact on a water resource; and (i) altering the bed, banks, course or characteristics of a watercourse

13 Background of WULA for Tongaat WWTW WWTW approaching capacity expansion will be required Next expansion will be m 3 /day (total m 3 /day) SDP indicates long term future development in catchment Ultimate capacity m 3 /day WULA to indicate phased expansion

14 Draft Report - Golder

15 ETHEKWINI WATER AND SANITATION (EWS) Presentation of Water Use Licence Application and IWWMP for the Tongaat Waste Water Treatment Works 1 October 2015

16 Authorisation Background The Tongaat Central WWTW is an existing waste water treatment works. It is in possession of a water use permit, permit number 2128B in terms of the Water Act, 1956 (Act 54 of 1956). The permit authorises the discharge of cubic meters per annum (30 Ml/day) of treated effluent to the Tongaat River. According the Department of Water and Sanitation (DWS), this permit expired in 2006 and ethekwini Water and Sanitation (EWS) therefore requires a Water Use Licence (WUL) for the Tongaat Central Waste Water Treatment Works (WWTW).

17 Regional Setting and Location of Activity The Tongaat Central WWTW is located in the town of Tongaat, situated along the Northern Coast of Kwa-Zulu Natal. It is situated in U30D quaternary catchment. It is situated in Erf 463 FU Portion 0 (remaining extent), portion 1 and Erf 462 portion 0.

18 Locality Map of the Tongaat Central WWTW

19 Catchment Map of the Tongaat Central WWTW

20 Property Map of the Tongaat Central WWTW

21 Water Uses Map for Tongaat Central WWTW

22 Description of the Activity for Tongaat Central WWTW The current operation at the Tongaat WWTW consists of pre-treatment, primary treatment, secondary treatment and tertiary treatment. Below is the main liquid stream treatment process and sludge handling facility. October 15,

23 Preliminary treatment: Description of the Activity for Tongaat Central WWTW Cont. Mechanical screening and vortex grit removal at Head of Works. A screw pump station lifts the pre-treated wastewater to a splitter box before it enters the mainstream treatment process at the aeration tanks. Sludge aeration: The treated sludge is aerated in a stirred anoxic basin. The activated sludge inflow is separated into two streams with varying numbers of lanes and cells per stream. No drying beds are used on site.

24 Description of the Activity for Tongaat Central WWTW Cont. Secondary clarification: Activated sludge solids separation process is performed in two secondary clarifiers. The dewatered sludge is discharged into skips for transport to an offsite disposal facility (Agricultural purposes). The secondary effluent is disinfected before discharge to the adjacent uthongati River.

25 Format of Report The report is presented in line with the following guideline documents: Department of Water and Sanitation s (DWS) Operational Guideline: Integrated Water and Waste Management Plan, First Edition: February 2010 Aide Memoire for Sewage Treatment Works Operational Guideline U2.1. Focus will be on sections of the guideline documents that are relevant to the protection of natural water resources and that ensure prevention of pollution to the surface water and groundwater resource. The report is not intended to be an exhaustive description of the project, rather a document containing sufficient information on the environmental surroundings, the disposal method and the likely impacts and how they are managed.

26 Key Topics Covered in the Report The report will cover the following: Introduction to the project Contextualisation of the activity Regulatory water and waste management framework Present Environmental Situation Analyses and characterisation of the activity

27 Key Topics Covered in the Report Cont. The report will cover the following: Monitoring and Control Risk Management and assessment Water and waste management philosophy, strategies, key performance objectives and action plan Section 27 Motivation

28 Applied Water Uses for Tongaat Central WWTW Section 21 (c) & (i) for: Proximity of site to wetland (within 500m buffer zone) and within 100m of the 1:100 year floodline; and Discharge pipeline impeding the flow of water in the River. Section 21 (f) for the discharge of treated sewage effluent into the uthongathi River. Section 21 (g) for the Waste Water Treatment Works itself.

29 Operational and design parameters Description Value 2012 annual average flow (Ml/d) June/July flow (ADWF) (Ml/d) 7.47 Population equivalent Harmon peak factor 2.03 Design capacity (Ml/d) 10 Current flow (Ml/d) 9 Expansion capacity (Ml/d) 20 with class 1 nutrient removal * Ultimate capacity (Ml/d) 140 with class 1 nutrient removal * based on estimated catchment flow * Class 1 nutrient level standard refers to the treatment based on conventional technologies for a final total nitrogen level of 8mg/l and phosphorus of 1mg/l

30 Section 27 Motivation In terms of Section 27 of the NWA, the report provides for how ethekwini will provide for the requirements. The table summarises the Section 27 motivation Section Content Description of issues 27(1)(a) Existing lawful water use There are no ELWU. Unlawful use The water uses associated with the operation of the WWTW is currently not authorised and therefore the site is currently unlawful. New use October 15, EWS is currently applying to the DWS for the following WULs: Section 21(c) & (i): WWTW within 500 m from the wetland buffer zone and within 100 m from the uthongati River floodline; Section 21(c) & (i): Discharge pipeline crossing the 100 m floodline and 500 m wetland buffer zone; Section 21(f): Discharge from the WWTW into the uthongati; and Section 21(g): Authorisation for the WWTW.

31 Section 27 Motivation Cont. Section Content Description of issues 27(1)(b) Need to redress the results of past racial and gender discrimination The WWTW services the entire Tongaat and surrounding community which includes all races within the community. The Works also employs people from previously disadvantaged backgrounds and EWS and well and the entire ethekwini Municipality has a high employment equity score. 27(1) (c) Efficient and beneficial use of water in public interest The Works provides a service that ensures health, hygiene and sanitation for the community. The Works attempts to comply to discharge standards with regards to the processing and discharge of final effluent into the water resource. 27(1)(d) (i) Socio-economic impact of the water uses if authorised The current Tongaat WWTW and proposed expansion aims to reduce the risk of overloading and associated problems at the works to a minimum. This will allow for the provision of safe and sanitary sewage facilities to all residents in the Tongaat area.

32 Section 27 Motivation Cont. Section Content Description of issues 27(1)(d) (ii) Socio-economic impact of failure to authorise water use or uses Failure to authorise the water use can result in stoppage of operation. The sewage treatment needs of the community can therefore not be catered for which will result in sanitation and hygiene issues. There may be a negative impact on the environment as citizens and industry may choose alternate unsanitary or unacceptable means of sewage disposal.

33 Section 27 Motivation Cont. Section Content 27(1)(g) Likely effect of the water use on the class and resource quality objectives 27(1)(h) Investments already made and to be made by the water users in respect of the water use Description of issues The Reserve Determination is currently being drafted by the DWS. EWS has already invested to upgrade the works to allow for the expanding population. Additional investment is planned to be made for the further expansion to 140 Ml/d. 27(1)(i) Strategic importance of the water use to be authorised Strategically the service provided by the Tongaat WWTW is a key service to the public and to the nation as a whole. The works allows for a proper living standard for citizens.

34 Section 27 Motivation Cont. Section Content Description of issues 27(1)(j) Quality and quantity of the water in the water resource which may be required for the Reserve and for meeting international obligations Currently no Resource Quality Objectives (RQO) has been set. The DWS is currently busy with a study to classify the Reserve. 27(1)(k) The probable duration of any undertaking for which a water use is to be authorised The Works is intended to service the community for the foreseeable future. The future expansion is planned to cater for expansions for the next 50 years. The DWS is requested to issue the licence for the maximum period possible.

35 Overview of WULA Regulatory Process

36 Water Use Licence Application Forms Form number DW757 DW901 DW902 DW763 DW768 DW781/775. DW766 DW903 DW767 DW904 and DW905 Description Registration form: Water Service Provider form Supplementary water use information property where water use occurs Supplementary water use information details of property owner Section 21 (c) Impeding or diverting the flow of water in a watercourse Section 21 (i) Altering the beds, banks, course or characteristics of a watercourse Supplementary water use information for Section 21(c) and (i) water uses Section 21 (f) Discharging waste or water containing waste into a water resource Supplementary water use information for Section 21(f) water uses Section 21 (g) Disposing of waste in a manner which may detrimentally impact on a water resource Supplementary water use information for Section 21(g) water uses

37 Thank you Contact details for Golder Associates Africa (Pty) Ltd: P.O. Box 13776, Hatfield, Pretoria, 0028 Tel. (012) Fax. (012)

38 Discussion Questions for clarity Comments welcome

39 Comments Written comments to Rose Owen at Comment Period 60 days 30 November 2015

40 Closure Goodnight