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Evidence Guide: RTE4519A - Develop a composting recipe

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

RTE4519A - Develop a composting recipe

What evidence can you provide to prove your understanding of each of the following citeria?

Identify and characterise raw materials.

  1. Raw materials are visually identified and categorised against established enterprise criteria.
  2. Raw material characteristics are entered into enterprise compost recipe calculator to achieve a balanced recipe.
  3. Where raw material identity or characteristics are uncertain or unknown, designated personnel are requested to take representative samples of material for laboratory analysis.
  4. Receival and handling requirements for raw materials are determined.
Raw materials are visually identified and categorised against established enterprise criteria.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Raw material characteristics are entered into enterprise compost recipe calculator to achieve a balanced recipe.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Where raw material identity or characteristics are uncertain or unknown, designated personnel are requested to take representative samples of material for laboratory analysis.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Receival and handling requirements for raw materials are determined.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Establish production objectives.

  1. Identified market requirements and priorities are translated into product specifications using product performance data and enterprise records.
  2. Raw material combinations that can potentially meet market requirements are identified.
Identified market requirements and priorities are translated into product specifications using product performance data and enterprise records.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Raw material combinations that can potentially meet market requirements are identified.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculate compost recipe.

  1. Raw material characteristics are recorded in enterprise compost recipe.
  2. Raw material proportions or ratios suitable for composting by the enterprise by a particular technology and method are specified by weight in resulting compost recipe.
  3. Pre-processing requirements of raw materials, feasible volumes of compost upon formation, and compost production plan are determined.
  4. Composting batch management procedures are reviewed and any required variations to standard management procedures are defined and documented as a new procedure.
  5. Compost production schedule is estimated and documented.
  6. Compatibility of resulting compost recipe and production schedule is confirmed against documented customer requirements and priorities.
  7. Density of pre-processed raw materials is quantified, and weight-based recipe is translated into volume-based recipe for production.
  8. Volumetric compost recipe and production procedures are recorded as operational batch or bucket recipe and procedure.
Raw material characteristics are recorded in enterprise compost recipe.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Raw material proportions or ratios suitable for composting by the enterprise by a particular technology and method are specified by weight in resulting compost recipe.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Pre-processing requirements of raw materials, feasible volumes of compost upon formation, and compost production plan are determined.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Composting batch management procedures are reviewed and any required variations to standard management procedures are defined and documented as a new procedure.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compost production schedule is estimated and documented.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compatibility of resulting compost recipe and production schedule is confirmed against documented customer requirements and priorities.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Density of pre-processed raw materials is quantified, and weight-based recipe is translated into volume-based recipe for production.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Volumetric compost recipe and production procedures are recorded as operational batch or bucket recipe and procedure.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Validate compost recipe.

  1. Raw materials are pre-prepared and mixed according to new compost recipe to form feedstock for composting.
  2. Composting batch is managed according to revised enterprise procedure.
  3. Composting process is monitored for efficiency in relation to estimated production schedule and enterprise requirements.
  4. Environmental and occupational health and safety (OHS) aspects and impacts are monitored for compliance with enterprise plan and regulatory requirements.
  5. Faults, variations or problems observed at any stage of process are identified and remedial action is carried out to maintain effective compost production.
  6. Sampling and testing of material during composting is conducted to determine completion of production process.
  7. End product quality is evaluated against established product specifications.
  8. Compost recipe, production schedule and procedures are revised to improve process efficiency and reliability, and product compliance with defined specifications.
Raw materials are pre-prepared and mixed according to new compost recipe to form feedstock for composting.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Composting batch is managed according to revised enterprise procedure.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Composting process is monitored for efficiency in relation to estimated production schedule and enterprise requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Environmental and occupational health and safety (OHS) aspects and impacts are monitored for compliance with enterprise plan and regulatory requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Faults, variations or problems observed at any stage of process are identified and remedial action is carried out to maintain effective compost production.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Sampling and testing of material during composting is conducted to determine completion of production process.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

End product quality is evaluated against established product specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Compost recipe, production schedule and procedures are revised to improve process efficiency and reliability, and product compliance with defined specifications.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Overview of assessment

This unit of competency could be assessed on its own or in combination with other units of competency relevant to the job function such as after:

RTE3512A Prepare raw materials and compost the feedstocks

RTE3513A Prepare value-added compost-based products

RTE3713A Carry out workplace OHS procedures

RTE3714A Maintain and monitor environmental work practices.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

The critical requirements for this unit of competency as a whole are listed below.

Assessment must confirm one's ability to:

calculate a compost recipe that is consistent with the technology and method available from combinations of raw materials

produce a compost recipe that will achieve defined product specifications

document compost production plan consistent with plant capabilities and site constraints.

Context and specific resources for assessment

Assessment for this unit of competency is to be largely practical in nature and must be assessed in a commercial-scale composting facility or in a situation that reproduces and/or simulates operational conditions.

For valid assessment, one should have opportunities to participate in exercises, case studies and other real and simulated practical and knowledge assessments that demonstrate the skills and knowledge specified in this unit.

The candidate should also have access to the following resources:

a range of load-shifting equipment

hand tools and equipment such as temperature probe, oxygen probe, mulch fork, gloves and shovel

personal protective equipment

raw materials for assessment, recognition and preparation

drying oven for testing

electronic balance or scales

batch recording forms and compost recipe forms

water and irrigation system

compost recipe calculators, either manual or electronic

Wilkinson, K et al 2001, Guide to Best Practice - Composting Green Organics, second edition, Department of Natural Resources, Government of Victoria.

Guidance information for assessment

To ensure consistency in one's performance, competency should be demonstrated on more than one occasion over a period of time in order to cover a variety of circumstances, cases and responsibilities and, where possible, over a number of assessment activities.

The skills and knowledge required to demonstrate competency must allow for application in a broad industry context, and should be transferable to a range of work environments, including the ability to deal with unplanned events. For example, this could include work within composting operations of varying scale; processing a range of different raw materials; producing a range of different composts and value-added products to meet the demands of different markets; located in an urban or rural context with varying environmental constraints; and using various equipment, practices, technologies and management systems.

Required Skills and Knowledge

This section describes the essential skills and knowledge and their level, required for this unit.

Required skills include:

documenting procedures in writing

interpreting and applying written procedures and formulas

reading and interpreting laboratory results

reading and interpreting sampling and testing data

using a computer.

Required knowledge includes:

control of hazards in handling raw materials and composting materials

processing duration required for various raw materials

range of commercial compost-based products

raw materials and their characteristics

relationship between key compost recipe variables and compost production

systems, technologies and methods in compost production.

Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording in the performance criteria is detailed below. Add any essential operating conditions that may be present with training and assessment depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts.

Raw materials or compostable organic materials may include:

animal mortalities

biosolids such as sewage sludge

crop residuals

dairy waste

fats and oils

food organics such as:

food waste

kitchen waste

food processing waste

forestry residuals

manures

organic sludges

other organic waste or by-product of processing

paper mill wastes

paper-based materials

plant materials such as:

garden organics

green organics

green waste

yard waste

sawdust and wood shavings

sewage facility grit and screenings

wood and timber (non-treated).

Raw materials can be characterised by their:

physical, chemical or biological properties

point of origin and any associated issues arising such as variability in material qualities.

Compost recipe:

is a mixture of materials that results in characteristics suitable for rapid and reliable biological transformation while minimising potential for negative environmental emissions

compost recipe calculations may involve:

simple calculations that can be carried out by hand or using a computerised spreadsheet

determination of carbon to nitrogen (C:N) ratio with suitable moisture content, structure and porosity for efficient and trouble-free composting for a given site and processing method

key variables in compost recipe that need to be balanced such as:

C:N ratio

moisture content

other nutrients

acidity or alkalinity (pH)

structure and porosity.

Pre-processing of raw materials commonly involves:

immediate incorporation with absorbent raw materials

materials size reduction

moisture adjustment through such things as addition of water

particle size screening

physical contaminant removal.

Compost production plan may include:

additional water required

compost recipe

final product or market specifications to be met

handling and pre-processing requirements for raw materials

maximum size of compost pile for effective management with available machinery

monitoring schedule

processing duration

value adding required.

Environmental aspects and impacts of production may include:

attraction of pests

emissions from vehicle and machinery operations

erosion

fire

leaks

litter

noise

odours

organic dusts

spills

water pollution from run-off or leachate.

OHS hazards may include:

biological hazards associated with raw materials or product

ergonomic hazards associated with manual handling

physical hazards such as:

compressed air and water

dust

hammer mills and grinders

hot or cold weather conditions

noise

shredders

underfoot conditions

vehicles and mobile machinery

sharps or other physical contaminants in materials.

Remedial action may include:

action taken in response to problems identified by self or others or at direction of manager such as:

actions carried out to maintain effective and consistent compost production

adjustments to compost batch management

adjustments to processing technique.