Recent Projects

CANTERBURY SPINNERS 

Waste Water Heat Recovery

ANDAR assisted Canterbury Spinners Ltd to identify several options for modifying its Dye House Wastewater System to reduce costs and improve the environmental performance.  The recommendations made by ANDAR consultants were implemented using heat exchangers, a rotary screen and storage tanks.  Designed and installed by ANDAR the heat recovery system will lead to considerable savings in energy and water.  

BARHILL CHERTSEY IRRIGATION SCHEME 

Intake & Diversion Gates

ANDAR supplied the intake gates for the new irrigation scheme serving mid-Canterbury.  This involved intake gates and fish by-pass gate at TrustPower's Highbank Power Station on the Rakaia River and 3 diversion/by-pass gates on the RDR at Methven.  The scheme takes up to 8-cumecs of water from the Rakaia back into the RDR for diversion into the Ashburton Lyndhurst Irrigation Scheme as a swap to supply the five BCI holding ponds.  ANDAR manufactured both sluice gates and lay-flat gates for the scheme.  

CEREBOS GREGGS 

Waste Water Treatment Plant 

The plant is designed to buffer and correct the pH levels in the trade wastewater from Cerebos Greggs Coffee Factory in Dunedin.  First the rotary screen removes the coffee solids from the water, depending on pH the water is then directed into oneof 30m3 tanks.  By splitting the flow water is then blended together before discharging to achieve the required pH.  This will minimise usage and cost of chemical pH correction.  The entire system was designed and manufactured inhouse with ANDAR's team of experts.

DIDYMO SCREENS

Didymo can enter water race intakes and block downstream equipment such as pumps and spray nozzles, taking considerable time and effort for farmers to clear.  Aqwell have developed an innovative screening system for the removal of didymo and other debris from irrigation water intakes. We have installed a number of screens on irrigation water intakes throughout Canterbury and Otago. Screens feature a stainless steel screen element sized to handle flows from 200 to over 2,000L/sec and a conveyor and brush automatic cleaning system run off a timer.

ROCK FERRY WINES

This small scale plant is ideal for small to medium wineries and crushing facilities and includes a sump, Aqwell rotary wedgewire screen, settling tank, balance tank with aeration and an irrigation system.

CLOUDY BAY WINES

This large scale plant is run as a Sequencing Batch Reactor (SBR), which results in advanced treatment of the winery waste water. It includes a sump, a large Aqwell rotary wedgewire screen, several settling tanks, a large (500m3) balance tank with aeration and an irrigation system as well as an advanced process control system with pH neutralisation, DO control and an irrigation control system. All pipe work is stainless steel.