Digester operation and making the most of the digestate: WASTES

Date to be confirmed in January 2020, The Studio, Leeds

Times:   9:30 AM – 4:30 PM

Fee:       1 day £395 + VAT  (includes slides presented)

Course Overview

There are around 500 plants digesting a range of feedstocks including food, crops and manures.  The biogas produced is a renewable energy source and can be used to generate electricity and heat or converted into biomethane for grid injection, whilst the biosolids produced are largely applied to land as whole digestate.

Operators and managers are faced with the challenges of balancing gate fees with increasing energy production whilst minimising the costs associated with digestate disposal/recycling.  There are many factors that influence the financial balance and this course provides operators, managers, designers and engineers with real life examples of digestion of different materials, successes and failures.

This course is aimed at operators, optimisers and managers, farm managers and agronomists involved in waste digestion.

Course Aim

Each tonne of waste (on a dry, not fresh weight basis) contains 4-10 MWh of energy, depending upon its composition.  The quantity recovered is a function of the digestion process, asset condition and quality of feedstock.  The digestate produced is both a cost to handle and an opportunity to recover nutrients and produce a quality product.

This course is designed to help attendees understand and act upon the factors that influence biogas production, sludge dewaterability, compliance, cost and revenue generation.

Learning is delivered through a combination of lectures, case studies and worked examples.

Course Programme

Digester Operation

  • The different phases of AD & key terms
  • Metrics for digester operation including VFA: alkalinity, hydraulic retention time, organic loading rate and rate of volatile solids destruction
  • Feedstocks for AD – food waste, green waste, agricultural waste
  • Trace elements and other additives
  • Commissioning digesters and takeover testing
  • Dry AD configuration and operation
  • Common operational problems & solutions including foaming and inhibition

Making the most of the digestate

  • Quality, regulations and assurance: including BCS, PAS110 and ADQP
  • Hazard & Critical Control Point Planning (HACCP) and its role in digestate quality management
  • Options for dewatering digestate, handling the liquor produced and nutrient recovery
  • Agricultural uses of digestate and future options

(A 1-day course, tailored your requirements, is a popular choice by water companies or contractors to have delivered on their sites to operational staff.  Contact if you’d like to discuss this option)

Trainer Profiles

Dr David Tompkins BSc, MISoilSci  
Head of Knowledge Exchange & Innovation

David is a soil scientist with almost two decade’s experience in biowaste treatment through aerobic and anaerobic routes.  He heads the Knowledge Exchange team at Aqua Enviro, providing technical support across a number of sector-leading conferences, as well as delivering technical consultancy on biosolids, biowaste and bioresource management – with a particular focus on product quality, safety and acceptability.  David routinely presents at industry-facing conferences and is a member of several CIWM and ADBA committees – as well as the Biosolids Assurance Scheme stakeholder committee.  Recent projects include: PAS110 support for AD facilities; hazard assessment and management in wastewater treatment; strategic bioresources’ management; development of novel decentralized, sustainable wastewater treatments.

Dr Maryam Kabir   
Senior Anaerobic Digestion Specialist

Maryam obtained her PhD in the field of Anaerobic Digestion. Her focus was the use of novel feedstocks and their pre-treatment techniques. Prior to joining Aqua Enviro, Maryam gained hands-on experience working on a commercial food waste AD plant near Leeds, UK.  Her role included commissioning, feedstock management, operation and process optimization of the AD plant, as well as provision of analytical tests for other AD plants on a commercial basis. Maryam’s expertise is in the provision of operational support, process control and feedstock optimization for food waste and farm fed AD plants.

Matthew Smyth  BSc, MRes, MBA, MCIWEM CSci CWEM Matthew Smyth
Technical Director

Matt has been in wastewater and sludge for twenty years and works with water companies, industry and waste producers to develop and implement solutions.  He has delivered this course (and variants) for ten years to over 300 staff from the Environment Agency, multiple water company staff and in this format, which is open to all.

Date to be confirmed. Please email to register your interest.

For more information about how Aqua Enviro
can help you, contact us...

Clare Hunter

Event and Communications Planner

01924 257891

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