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Advisory Board

The Australian & New Zealand Biosolids Partnership, or ANZBP has been created to promote and support the sustainable management of biosolids in Australia and New Zealand.

The Australian Water Association (AWA) is facilitator and administrator for the ANZBP, using a subscription model to raise the necessary funds. The key stakeholders are the water utilities in Australia and New Zealand which produce and have to manage biosolids, practitioners (consultants and contractors), the agencies responsible for regulating the management and use of biosolids and research houses.

ANZBP members are from organisations around Australia and New Zealand.

The ANZBP is guided by an Advisory Board comprising of a cross-section of stakeholders, which reports to the AWA Board. Members of the Advisory Board are:

Mr Paul Darvodelsky (Chair)


Paul is a chemical engineer with nearly 30 years experience in the water industry. He specialises process design and strategy with a specific focus on biosolids management. Paul is one of the most experienced biosolids management technologists in the region having completed over 30 major biosolids management strategies involving a total of over 20 million people. He has also been involved in the design, construction, procurement, commissioning and operation of over 100 solids handling facilities throughout Europe and Australasia. Paul has developed an extensive, strategic biosolids management model over the past 13 years which is designed to build multi-process biosolids management options for single or multiple plants. This model includes process sizing modules for thickening, dewatering, stabilisation, storage and odour control. Paul also has a keen interest in sustainability and greenhouse gas emission issues and has worked on a range of projects involving energy and nutrient recovery from biosolids.

Dr Nirmala Dinesh

SA Water

Nirmala is an Environmental engineer with a ph.D and over 15 years’ experience in the wastewater treatment and reuse industry. She has extensive experience in all aspects of wastewater treatment planning, including investigations into process optimisation; pilot plant design and testing; concept and detailed design of treatment plants; options investigations & feasibility studies, commissioning services and energy optimisation. She is the biosolids discipline leader in SA Water and provides advice on bisolids handling in WWTPs including all phases of planning, treatment and management of Biosolids . She has been instrumental in the development and promotion of composting of biosolids from Metro and Country WWTPs in SA as an additional disposal and reuse route.

Dr Jacqui Horswell

ESR New Zealand

Jacqui is an Environmental Microbiologist at ESR and leads the Biowastes research programme. After obtaining her PhD from Aberdeen University Jacqui moved to New Zealand where she has delivered relevant research through engagement with the NZ waste and land management sectors for over 15 years. Jacqui’s research interests include biosensors and pathogen survival and mobility and more recently how mixtures of contaminants interact and impact soil biological processes.

Mr Peter Marczan

Office of Environment and Heritage, NSW Government

Peter has over 20 years experience in water pollution, urban water management and water quality. He is a chemical engineer and has spent most of his career working in environmental regulation. Peter is currently Manager of Water Quality Management at the NSW Office of Environment and Heritage and develops and implements strategies for improving environmental water quality including providing expert advice to the NSW EPA on technical and strategic issues related to water pollution, including biosolids regulation. He was previously responsible for implementation of the NSW Biosolids Guidelines.

Mrs Kelly Hopewell

City of Gold Coast

Kelly Hopewell is the Coordinator of Process Engineering at the City of Gold Coast, and has been in the water industry for over 15 years.  Starting out in drinking water quality while working as a research assistant at Griffith University, she had a steep learning curve in the field of wastewater treatment once moving the Gold Coast Water in 2005.  Kelly and her team are responsible for working with the operators to optimise the Gold Coast’s four sewage treatment plants, endeavouring to reduce chemical, electricity and biosolids haulage costs, while maintaining a high quality effluent. Kelly has a passion for biosolids and finding innovative ways to manage this potential resource.

Derek Van Rys

Sydney Water

Derek is currently Wastewater & Residuals Improvement Manager within the Treatment business in Sydney Water. He has a small team that look to introducing new technology and driving improvements in the wastewater and biosolids processes at Sydney Water. Prior to that he was the Residuals Manager that looked after Biosolids reuse contracts.

After joining Sydney Water over 20 years ago he has worked in operations at many of the treatment plants in Sydney Water. He has been a plant manger at four plants before moving into the technical roles mentioned above. He was a AWA Biosolids Committee member from 2012 till 2014.

He has an BE in Chemical Engineering and a MEngSc in Industrial Management both from UNSW.

Dr Bill Wood


Bill has an early background in agriculture, he has a Doctorate in Marine Science and has spent over 30 years in marine research, industrial management, and in consultancy. Bill joined the Tasmanian Water Corporation in 2009 and currently is responsible for the development of the State biosolids strategy and management program. Bill is interested in applying innovative approaches to all aspects of biosolids management, in particular lagoon processes, biosolids recovery and handling and in the marketing and the beneficial end use of this valuable by-product of the wastewater industry.