NZQA registered unit standard 26111 version 2 Page 1 of 3 Title Describe and explain the role and treatment of microorganisms in wastewater Level 5 Credits Purpose 3 This unit standard is for people who may or intend to analyse water samples for quality using microbiological techniques in a laboratory. People credited with this unit standard are able to describe and explain: the dynamics of microorganism populations in water; the processes necessary to produce potable water; and treatment processes for water. Classification Science > Microbiology Available grade Achieved Explanatory notes 1 Water standards are specified in Drinking-water Standards for New Zealand 2005 (Revised 2008) Wellington: Ministry of Health. http://www.health.govt.nz/publication/drinking-water-standards-new-zealand-2005revised-2008. 2 Glossary Potable water is water of sufficiently high quality that it can be consumed or used without risk of immediate or long term harm. Outcomes and evidence requirements Outcome 1 Describe and explain the dynamics of microorganism populations in water. Evidence requirements 1.1 The nutritional requirements of microorganisms found in water are described. Range chemolithotrophs, chemoorganotrophs, photolithotrophs, photoorganotrophs, filamentous bacteria. NZQA National Qualifications Services SSB Code 130301 New Zealand Qualifications Authority 2016 NZQA registered unit standard 1.2 26111 version 2 Page 2 of 3 The influences of environmental factors are explained in terms of microorganism populations in water. Range temperature, density of water, pH, pressure, salinity, light, redox potential. Outcome 2 Describe and explain the processes necessary to produce potable water. Evidence requirements 2.1 Suitable water sources are described in terms water standard requirements. 2.2 The effects of treatment processes in the preparation of potable water are explained in terms of microorganism populations. Range sedimentation, coagulation, filtration, disinfection, storage, reticulation. Outcome 3 Describe and explain treatment processes for water. Evidence requirements 3.1 Primary, secondary, and tertiary water treatment processes are described. 3.2 Water treatment processes are explained in terms of microorganism populations. Range anaerobic digestors, activated sludge, trickling filters, oxidation ponds, wetlands, constructed wetlands, infiltration, irrigation, disinfection, cesspools, septic tanks. Replacement information This unit standard and unit standard 26112 replaced unit standard 8039. Planned review date 31 December 2018 Status information and last date for assessment for superseded versions Process Version Date Last Date for Assessment Registration 1 21 May 2010 N/A Rollover 2 27 January 2015 N/A NZQA National Qualifications Services SSB Code 130301 New Zealand Qualifications Authority 2016 NZQA registered unit standard 26111 version 2 Page 3 of 3 Consent and Moderation Requirements (CMR) reference 0152 This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do. Please note Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment. Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards. Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards. Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements. Comments on this unit standard Please contact NZQA National Qualifications Services nqs@nzqa.govt.nz if you wish to suggest changes to the content of this unit standard. NZQA National Qualifications Services SSB Code 130301 New Zealand Qualifications Authority 2016