In 2003 Palmerston North City Council (PNCC) was granted consent to discharge treated wastewater to the Manawatū River for a period of 25 years. To meet consent standards a $16m plant upgrade was undertaken to reduce dissolved reactive phosphorus (DRP) in the discharge to limit the growth of periphyton and impact on macroinvertebrates in the river. A significant improvement to river water quality and ecology resulted.
This paper will examine the elements of control and telemetry systems and the consequences of failure of various components of these systems. There will be a focus on isolating failures so that the rest of the system functions correctly, and maintaining a level of functionality system-wide in cases of major breakdowns.
Service connections are the neglected cousins of utility services. But while failure of an individual service connection may cause little more than an isolated inconvenience, the sheer number of service connections and their importance in connecting service users to the main system means that a seismic event has potential to cause widespread service disruption that has an immediate impact on the public, on service users and on service providers.
The paper will look at examples of CCC infrastructure that proved to be resilient during the earthquakes, along with examples of failures and the lessons learned.
This paper highlights the key issues and describes the lessons learnt from both the installation of the flow control valves and the completion of structural strengthening works at each of the reservoirs.
In most catchments trade waste forms a significant fraction of the total mass load which waste water treatment plants (WWTPs) are required to process.
This year we take the journey a step further to look at a country with many more similarities to New Zealand, the proud nation of Scotland. Like New Zealand, Scotland is a small country with a low population and an abundant water resource having similar populations and GDP.
The Jump Platform on Wellington Waterfront is a public facility which is installed above an open section of Taranaki Wharf. It consists of an elevated platform some 8 m above the water level, with stairs for access. The area is popular with swimmers and spectators and has created a focal point at the waterfront.
This paper provides recommendations for policy makers and potential improvements to existing bioretention technology, based on the results of the study, in addition to wider applicability for bioretention utilisation in New Zealand.
The paper provides an overview of the process that were undertaken from start to finish which commenced with a risk mitigation options assessment that considered not only the “do nothing”, but also options involving an improved public awareness campaign, application of both dry and wet scrubber technology and also conversion of the disinfection system from a gas to a hypochlorite-based solution.
The paper will show how one low cost technological solution has helped UK Water companies to optimise the value of their operational efforts, introducing efficiency to the wastewater network and reducing on-going maintenance expenditure. The technology also avoids the need to incorporate the use of precious potable water resources, using the wastewater itself to cleanse the network.
In May 2015 Kapiti Coast District Council (KCDC) completed the first stage of the Kapiti Water Supply Project (KWSP) to ensure that the water demands of the Waikanae, Paraparaumu, and Raumati (WPR) communities are met for the next fifty years.
This paper outlines some of the unique problems faced on Digester 8 through the design, procurement, construction and commissioning phases and the lessons learnt by the collective team in resolving these issues.
This paper addresses the importance of preplanning and budgeting for a monitoring programme and the subsequent collection, management, QA and presentation of the influent and effluent data.
This paper outlines the Waikato District Council experience in modernising the collection and management of data for operations and compliance reporting.
This paper aims to identify the key barriers to achieving chemical compliance in the water industry and highlight some tools that make understanding and applying chemical compliance requirements easier.
In January 2014, Fonterra Ltd made the decision to install a new milk powder dryer at its Lichfield Dairy Manufacturing site, to more than double the site’s milk processing capacity. A resource consent application for the site’s process wastewater irrigation was lodged with Waikato Regional Council in June 2014, and the consent was granted in December 2014 without a hearing being required.
The Gisborne District Council (GDC) has identified long term water availability in the Poverty Bay area as being a potentially limiting factor in future regional development. A substantial proportion of the water used for irrigation across the Poverty Bay Flats is derived from groundwater, with most of the abstraction being from the confined Makauri Aquifer.
This paper documents the transformation and convergence of the electronic control systems, which manage the bulk of the assets since 2012 until 2015. It also provides some incite of the roadmap going forward for merging with the GWRC Bulk Water systems. It highlights the benefits of moving to a regional approach in being able to do more with the resources (Staff), shows how Standardisation in different areas of work build upon each other to provide a more efficient system providing easier access to regional, solid data for the decisions of the future.