This paper will discuss the design optimization process, consenting challenges for untreated washwater discharge and the collaboration of the structural and planning teams with the technology supplier required to develop this design solution.
This paper draws on the authors’ 80 years of combined experience in the design and implementation of water treatment plants to help frame the industry’s thinking about how to cost effectively design water treatment for small supplies, while balancing the risks of non-compliance and waterborne disease outbreaks.
Activated Carbon has long been used as a potable water filtration media for the removal of Dissolved Organic Carbon (DOC) that would otherwise lead to chlorine decay, regrowth in distribution networks and elevated THM levels.
This paper outlines the challenges confronting the development of a feasible treatment solution for PFAS-impacted wastewater, which were identified and demonstrated during the development and testing of a process for two commercially available products in the treatment of PFAS-impacted firefighting training wastewater.
This paper presents the project from inception to operation, including the outcomes of early trials and the key matters and lessons learnt that influenced the design and construction, recognising the increasing importance of effective scum management in WWTP operations.
This paper will summarise the key energy aspects of these six “Water Resource Recovery Facilities”, and will then relate their similarities and differences to a range of New Zealand counterparts to assess whether energy neutrality is a realistic goal for them – or is a dream which will be difficult to achieve.
This project involved the replacement of the previous resource consents for the Omaha Wastewater Treatment Plant (“Omaha WWTP”) treated wastewater discharges. The Omaha WWTP is located ~70km north of Auckland on Jones Road, Omaha Flats. It treats wastewater from Omaha, Point Wells and Matakana.
In this study, the occurrence and removal efficiency of 19 selected pharmaceuticals and Personal care products (PPCPs) was investigated in an urban wastewater treatment plant of New Zealand to evaluate the removal efficiency of the treatment plant which relies on membrane bioreactor (MBR) and Bardenpho process for wastewater treatment.
This paper presents the project from master planning to commissioning, including the outcomes of early operation. A number of considerations and lessons learnt that influenced the design, construction and early operation of this project, which have also been discussed in this paper.
This paper describes a trial investigating diverting cold secondary sludge directly to the mesophilic digesters to provide cooling. The full scale trial was conducted on a single mesophilic digester (Digester 4), to determine the viability of this approach before full implementation.
This paper discusses the site-specific factors that influenced each preferred option. It also presents a multi-criteria decision matrix that was developed to allow for an evaluation of the reticulation options on a holistic basis and to enable the right selection of a reticulation option at an early stage in the project timeline.
This investigation is focused on the current technological limitations in the condition assessment of critical water distribution assets and how they can be overcome with new technologies entering into the market.