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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Demonstrate knowledge of different methods of achieving disinfection in a water and wastewater effluent environment 
SAQA US ID UNIT STANDARD TITLE
254103  Demonstrate knowledge of different methods of achieving disinfection in a water and wastewater effluent environment 
ORIGINATOR
SGB Water Sector 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 12 - Physical Planning and Construction Civil Engineering Construction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  2 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2026-06-30   2029-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
This unit standard is intended for persons who are responsible for disinfecting water or effluent on water and wastewater effluent treatment works. Learners will be provided with knowledge of the different methods that can be used for disinfection and an understanding of the advantages and disadvantages of the preferred methods of disinfection. This unit standard will provide employment opportunities within the water and related industries.

Learners credited with this unit standard will be able to:
  • Discuss the presence and role of micro-organisms in an environment.
  • Identify the different methods of disinfection.
  • Determine dosages of disinfection.
  • Identify the methods used to measure the effectiveness of the disinfection process. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that learners are already competent in the following:
  • Communication at NQF Level 2.
  • Mathematical literacy at NQF Level 2. 
    		•

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Discuss the presence and role of pathogenic micro-organisms in the water and wastewater effluent environment. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The importance of non-pathogenic micro-organisms is discussed in terms of their role in water and wastewater effluent treatment. 

    ASSESSMENT CRITERION 2 
    Pathogenic micro-organisms are identified according to waterborne related diseases. 
    ASSESSMENT CRITERION RANGE 
    Related waterborne diseases include but are not limited to cholera, typhoid and diarrhoea.
     

    SPECIFIC OUTCOME 2 
    Identify the different methods of disinfection. 
    OUTCOME RANGE 
    Different methods refer to but are not limited to heat, oxidizing chemicals, ultra-violet light and ultra filtration. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The terms disinfection and sterilization are explained in terms of their difference. 

    ASSESSMENT CRITERION 2 
    The application of heat in the disinfection of water is explained with examples. 

    ASSESSMENT CRITERION 3 
    The range of oxidizing chemicals used to disinfect water and wastewater effluent is discussed. 
    ASSESSMENT CRITERION RANGE 
    Oxidising chemicals refer to but are not limited to chlorine, chlorine products, bromine and ozone.
     

    ASSESSMENT CRITERION 4 
    The mechanism of ultra-violet light to disinfect water and wastewater effluent is explained in terms of its effects on cells. 

    ASSESSMENT CRITERION 5 
    The effectiveness of ultra filtration processes as an emerging technology is explained in the context of water and wastewater effluent disinfection. 

    ASSESSMENT CRITERION 6 
    Different methods of disinfection are discussed according to their advantages and disadvantages. 

    SPECIFIC OUTCOME 3 
    Determine dosages of disinfection. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Factors determining the required dosages are discussed in relation to the quality of water and wastewater effluent. 

    ASSESSMENT CRITERION 2 
    The significance of liquid retention time is discussed in relation to concentration or power input. 

    ASSESSMENT CRITERION 3 
    The implications of overdosing and under-dosing are explained in terms quality, cost and effects on environment. 

    SPECIFIC OUTCOME 4 
    Identify the bacteriological tests used to measure the effectiveness of the disinfection process. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Knowledge of bacteriological tests to determine different micro-organisms is demonstrated with examples. 
    ASSESSMENT CRITERION RANGE 
    Bacteriological tests include but are not limited to total plate count, E-Coli, and Total coliforms (Noma).
     

    ASSESSMENT CRITERION 2 
    The result of bacteriological tests are interpreted in terms of the plant requirements and relevant legislation. 
    ASSESSMENT CRITERION RANGE 
    Relevant legislation refers to but is not limited to SANS 241 and National Water Act.
     


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant ETQA according to the ETQA`s policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments at exit points of the qualification, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described both in individual unit standards as well as the integrated competence described in the qualification. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
  • Different technologies of disinfection.
  • Material Safety Data Sheets (MSDS) of disinfecting chemicals.
  • Installation requirements and the operation thereof.
  • Stacking, storage and handling of chemical.
  • Evacuation and emergency procedure in an event of an accident.
  • First aid that should be applied when emissions and accidents take place.
  • Legislation pertaining to disinfection process.
  • Trouble shooting on the installation/s.
  • Reporting of incidents and the actions there after. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify factors contributing to poor disinfection and take corrective action by adjusting the disinfection process. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others such as the laboratory team by collaborating with the team by providing the necessary samples required for bacteriological testing. 

    UNIT STANDARD CCFO ORGANISING 
    Plan, organise and manage oneself and one's activities responsibly and effectively by being aware of the quality of water and wastewater effluent in order to adjust the disinfection process. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and interpret bacteriological test result to determine whether the disinfection process is effective. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation to report disinfection process changes to his supervisors. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation as the lack of effective disinfection could affect community health and the aquatic environment. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Integrated Assessment:

    When conducting assessments, assessors must ensure that they are familiar with the full text of the unit standards being assessed. Assessors must ensure that the assessment covers the specific outcomes, critical cross-field outcomes and essential embedded knowledge by developing assessment activities and tools, which are appropriate to the contexts in which the learners are working. These activities and tools may include self-assessment, peer assessment, formative and summative assessment. It may be more effective and efficient to assess a number of unit standards together in an integrated way, thus reducing the overall number of assessments and ensuring that commonalities that exist between a number of unit standards are captured in a way that makes sense for assessment.

    Assessment Option:

    Learners could be assessed using the following methods:
  • Oral or written questions.
  • Observation.
  • Product sample reports. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  60190   National Certificate: Water and Wastewater Process Control  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  EWSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    1. CHILUTSI TRADING ENTERPRISE 
    2. DR HE MAEPA INSTITUTE 
    3. ERGO MAPHELONG INSTITUTE (PTY) LTD 
    4. ERWAT 
    5. HAZYVIEW WATER SKILLS ACADEMY 
    6. K-BONENG CONSULTING SERVICES (PTY) LTD 
    7. Kelvin Power (Pty) Ltd 
    8. NTANDOKAZI HOLDINGS (PTY) LTD 
    9. SEANEGO INTERGRATED NATURAL RESOURCES MANAGEMENT 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.