New Zealand Projects

Tauranga City Council

Project Description: Te Maunga Waste Water Treatment Plant, Mt Maunganui - Upgrade 2016

In 2016 Reaman Industries were contracted by the Tauranga City Council to replace the diffusers in the reactors of their existing waste water treatment plan in Mt Maunganui.

Tauranga City Council

Project Description: Te Maunga Waste Water Treatment Plant, Mt Maunganui - Upgrade 2005

The Te Maunga Waste Water Treatment Plant (WWTP) provides wastewater treatment for the domestic, commercial and industrial communities from the Mount Maunganui and Papamoa catchments. The WWTP is located south of Tauranga and was commissioned during 1996. The first upgrade took place in the year 2000, which entailed modifications to the aeration control and distribution system and the installation of additional diffusers. The plant was designed as an extended aeration activated sludge system, utilising an oxidation ditch configuration.

The modifications to the bioreactor and the provision of additional aeration capacities resulted in doubling the organic and hydraulic capacity of the existing plant (from 8,000 m3/d to 16,000 m3/d) and controlling nitrogen removal more effectively.

The design of the aeration system was critical to ensure that minimal disruptions and downtime occurred during the removal of the existing ceramic diffusers and the installation of new banks of diffusers. Divers were used to install brackets on the tank floor. Tube type silicon membrane diffusers were installed in all the aeration zones. The banks of diffusers are removable and can be lifted out of the tanks using a 50-tonne crane.

The removal of the existing diffusers, the installation of the new banks of diffusers and the connection and extension of the existing pipe header had to be carried out progressively, to ensure continued treatment of the incoming wastewater.

This project was completed on time and under budget including:

• 20% overall site power saving, which equates to at least 30% power saving on the aeration system as reflected in lower airflow requirements
• Lower utilisation of blowers which means longer life expectancy
• Doubling the treatment capacity from 32,000 EP to 64,000 EP

Contract Value:  $875,000 

Contract Period:  4 months

Te Maunga WWTP Stage 2 upgrade

Carterton District Council

Project Description: Kaipatangata Water Supply

Reaman Industries designed, supplied and installed a 200m3/hour Multi Layer Filtration/Bag Filter System, including pipework and valves, programmable logic controller and motor control centre including testing and commissioning the system.

This was the first of its type in New Zealand and was designed by Water & Waste Treatment NZ Limited in a joint venture with Reaman Industries to provide not only water of a quality to exceed the drinking water standard of New Zealand, but to ensure the removal of water born protozoa including giardia lamblia and cryptosporidium cysts.

It is considered by leading world authorities on water treatment, that the removal of giardia from drinking water only requires the removal of particles greater than 5 micron and for the removal of cryptosporidium particles 2 micron and greater. However, this system includes a 2-stage filtration process to ensure the removal of 99.9% of all particles 1 micron in size and larger (the naked eye detects particles greater than 80 microns).

As a result of the filtration process, the water leaving the plant will not only be free of parasites but will be close to bottle water quality. The computer-driven plant is close to being fully automatic and requires little operation attention. The free chlorine residual and the pH is automatically maintained and the turbidity of the water is measured both on entry to the plant and after treatment. Flow is continuously measured and totalised.

This system utilises Bruner multi-layered filters with a 10 micron particle retention followed by bag filters with 1 micron absolute retention to ensure the removal of all water born protozoan cysts including giardia and cryptosporidium. Disinfection and pH is fully automated with the latest chlorination and monitoring equipment from Capital Control Co Inc of USA and the plant operation is controlled by Allen Bradley PLC.

Contract Value: $840,000 

Construction Period: 8 Months

Te Aute College, Central Hawke’s Bay

Project Description: Water Treatment Plant

Reaman Industries supplied a 20m3/hr water treatment plant to produce potable water to the School’s spring water supply. The water is filtered to 5 micron and softened through industrial water softeners at the end of this process. The treated water passes through taste and odour treatment processes prior to entering the school’s reticulation system.

Contract Value: $150,000 

Construction: 3 Months

Village of Luggate, near Wanaka

Project Description: Rotating Biological Contactors Waste Water Treatment Plant

In 2003 Reaman Industries supplied and installed a 110m3 waste water treatment plant in the Village of Luggate which is adjacent to the township of Wanaka.  This project was completed to time and budget.

After discussions with the consulting engineer MWH, an S&P subsurface RBC complete with primary treatment tanks, filtration and disinfection processes were supplied and installed.  The treated effluent is discharged to deep bed disposal trenches which are rotated on a regular basis.

Contract Value: $265,000 

Construction Period: 4 Months

BP Service Station, Silverdale, Auckland

Project Description: New Waste Water Treatment Plant

In association with URS Consulting Engineers, Reaman Industries Limited secured a contract to design, supply and install a Waste Water Treatment Plant for BP Oil New Zealand Limited.

Located just north of Albany, Auckland, the plant was required to process all the waste water generated from the motorway service station. High effluent quality was also imperative for the required Resource Consent.

After reviewing all available options, Reaman Industries designed and supplied a cutting edge system called the SEBAS® Sequencing Batch Reactor (SBR). The SBR process enables the optional removal of nutrients (nitrogen/phosphorus) simply by incorporating anoxic/anaerobic mixing during FILL and cycling (on/off) of aeration blowers during FILL and REACT phases.

The essential features of the SEBAS® SBR are the plug-flow initial reaction conditions and complete-mix reactor basin. Each SEBAS® reactor basin is divided by baffle walls into three sections (Zone 1: Selector, Zone 2: Secondary Aeration Aeration, Zone 3: Main Aeration). Sludge biomass is continuously recycled from Zone 3 to the Zone 1 selector to remove the readily degradable soluble substrate and favour the growth of the floc-forming microorganisms. System design is such that the sludge return rate causes an approximate daily cycling of biomass in the main aeration zone through the selector zon. The mechanisms of Zone 1 and the internal sludge recycle eliminate the requirement for separate fill-ratio selectivity, anoxic, and anaerobic mixing periods.

The selector is self-regulating for any load condition and operates under anoxic conditions during aerobic periods and anaerobic reaction conditions during non-aerated periods. Polishing denitrification and enzymatic transfer of available substrate during enhanced biological phosphorus removal is also achieved in the selector zone. The complete-mix nature of the main reactor provides flow and load balancing and a tolerance to shock of toxic loadings, and the process prevents solids washout during peak or wet weather hydraulic surges.

Effectively, the SEBAS® SBR enables the BP Dairy Flat plant to process high strength waste at 60m³/day and still produce high effluent quality. At present 80% of Nitrogen is removed from the effluent.

Part of the overall design by Reaman Industries called for easy maintenance and plant operation. This has been achieved by making the plant operation and control automated. Separate flow and load balancing are not required ensuring that the process is not fixed in the physical design of the plant.

Contract Value: $890,000 

Construction Period: 8 Months

Bay of Many Coves, Marlborough Sounds

Project Description: Waste Water Treatment Plant, Filtration, Chlorination, Ultra Violet Sterilization and Irrigation System

To supply and Install a 20M3/day System S&P RBS Waste Water Treatment Plant, Filtration, Chlorination, Ultra Violet Sterilization and Irrigation System. 

Contract Value: $190,000 

Construction Period: 4 Months

South Wairarapa District Council

Project Description: Potable Water Supply and Storage Facilities 

Design, Supply, Installation of Control and manufacture of Telemetry (Datran-Radio-Based) System for Martinborough, Potable Water Supply and Storage Facilities.

Contract Value: $130,000

Construction Period: 2 Months

Wellington Regional Council

Project Description: Potable Water Pumps, Pipework, Valves, Electrical Services

Supply, Installation and Commissioning of Potable Water Pumps, Pipework, Valves, Electrical Services Datran Radion Based Control and Monitoring System.

Contract Value: $220,000 

Construction Period: 4 months

Central Hawkes Bay District Council

Project Description: Telemetry System for Storm Water and Sewage Sites

Design, supply and install Telemetry (Qtech Radio Based) System to both storm water and sewage sites. 

Contract Value: $125,000 

Construction Period: 2 Months

Chatham Island Council

Project Description: Waitangi Waste Water Treatment Plant

To design, supply and install a 65m3/day RBC Waste Water Treatment Plant for the community of Waitangi.  The plant includes flow balancing, tertiary filtration and Ultra Violet Disinfectant. 

Contract Value: $460,000 

Construction Period: 2 Months

Manawatu District Council

Project Description: Water Supply Pump Station

New Town Water Supply Pump Station.  Design, Manufacture, Supply and Installation of 5 x 30kw Bore Pump, Pipework, Instrumentation, Motor Control Centres, Variable Speed Drive Unit, Testing and Commission.

Contract Value: $510,000 

Construction Period: 6 Months

Westport Water Treatment

Project Description: Water Treatment Plan Aeration System

To design and Install the aeration system and air supply Pipework from the Blower.

Contract Value: $450,000 

Construction Period: 5 Months

Te Mata Estate Winery, Hawke's Bay

Project Description: Activated Sludge Treatment Plant

Design and Build an Activated Sludge Treatment Plant and Tertiary Filtration. 

Contract Value: $150,000 

Construction Period: 3 Months 

J Wattie Foods, Hastings

Project Description: High Pressure ‘Clean In Place’ Cold Water Cleaning System

Design, Supply and Commission of High Pressure ‘Clean In Place’ Cold Water Cleaning System. System based on a Roto Jet (37Kw) High Pressure Pump, Pipework and valves, Water storage and Filtration of Reclaimed Water. A stainless steel ringmain through the factory with 32 outlets.  Each outlets includes isolator valve, Detergent injector and Quick Release Coupling, Auto Rewind Hose Reels, Quick connect High Pressure Lances, etc. 

Contract Value: $340,000 

Construction Period: 3 Months

Affco (NZ) Ltd, New Zealand

Project Description: Sulphuric Acid Dosing System

Design, manufacture and Installation of a Sulphuric Acid Dosing System for pH Control of soft offal for various freezing works around New Zealand. 

Contract Value: $95,000 

Construction Period: 1 Month 

Anchor Products Ltd

Project Description: Low Pressure Foaming Unit and Remote Stations

To design and Manufacture a Low Pressure Foaming Unit and Remote Stations plus a High Pressure Cleaning System, Test and Commission System, to the cheese Manufacturing Hall. 

Contract Value: $125,000 

Construction Period: 2 Months 

Sea Lord Products Ltd, Nelson

Project Description: High Pressure Pumps

Supply and Commissioning of two Roto Jet (55kw) High Pressure Pumps for Factory Wharfside High Pressure Cleaning Unit. 

Contract Value: $220,000 

Construction Period: 3 Months