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Title / Manage, monitor, and optimise lagoon processes in wastewater treatment
Level / 5 / Credits / 3
Purpose / People credited with this unit standard are able to manage, monitor, and optimise, lagoon processes in wastewater treatment.
Classification / Water Industry > Wastewater Treatment
Available grade / Achieved
Explanatory notes
Definitions
Critical points – points in a process or in equipment where failure to function correctly can lead to adverse affects which may affect the treatment process or other processes in the treatment plant.
Lagoon – an anaerobic or aerobic detention and treatment basin holding one or more days’ wastewater flow.
Optimise – adjusting plant input variables to make the process as effective as possible to achieve the desired output, taking into account the constraints of cost, human input, effluent quality, and resource consent requirements.
Organisational procedures – instructions to staff, and procedures which are documented in memo or manual format and are available in the workplace. These requirements include but are not limited to – site specific requirements, manufacturers’ specifications, product quality specifications, and legislative or regulatory requirements.
Wastewater includes stormwater and sewage systems.
Outcomes and evidence requirements
Outcome 1
Manage lagoon processes in wastewater treatment.
Evidence requirements
1.1Lagoon loading rate and diurnal biological activity are optimised in terms of detention times and timing of discharge in accordance with organisational procedures.
1.2Lagoon performance is managed in terms of flow variations.
1.3Lagoon performance is managed in terms of sensory observation in accordance with organisational procedures.
Rangesensory observation – sight, smell;
observation of – lagoon sludge, hydrogen sulphide, ammonia, frothing.
Outcome 2
Monitor lagoon processes in wastewater treatment.
Rangeincludes but is not limited to – indicator organisms, inflow, outflow, Suspended Solids (SS), Biochemical Oxygen Demand (BOD), Dissolved Oxygen (DO).
Evidence requirements
2.1Samples are taken for analysis in accordance with lagoon processes and organisational procedures.
2.2Data is collected and interpreted in accordance with lagoon processes and organisational procedures.
Outcome 3
Optimise lagoon processes in wastewater treatment.
Evidence requirements
3.1The lagoon process variables and operating factors are adjusted in accordance with the results of monitoring.
3.2The critical points in lagoon processes are managed in accordance with organisational procedures.
Replacement information / This unit standard and unit standard 24937 were replaced by unit standard 29941.This unit standard is expiring. Assessment against the standard must take place by the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process / Version / Date / Last Date for AssessmentRegistration / 1 / 19 September 2008 / 31 December 2018
Review / 2 / 16 March 2017 / 31 December 2018
Consent and Moderation Requirements (CMR) reference / 0101
This CMR can be accessed at
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.
Infrastructure ITOSSB Code 101813 / New Zealand Qualifications Authority 2019 / / New Zealand Qualifications Aut