Afrasia Bank Sustainability Award
Sustainability award

RHT Bus Services is a proud recipient of an AfrAsia Bank Sustainability Award, which was presented to the company during the AfrAsia Bank Sustainability Summit 2019, held on 14-15 October 2019, at the Caudan Arts Centre. A premiere in Mauritius. These awards seek to reward local organisations or businesses which have made of sustainability an integral part of their business practices.

Fleet Age and Carbon Footprint

The RHT Bus Services Ltd (RHT BUS) fleet consisted of 80 vehicles at end-June 2019 with a mix of 45 high chassis buses, 34 semi-low floor buses and one low floor bus, the only double-decker on the island. The average flet age is 6.25 years with vehicles classified according to Euro emission standards below:

  • 47.5 % are Euro 0
  • 31.25 % are Euro II
  • 1.25 % are Euro III
  • 17.5% % are Euro IV and
  • 2.5 % are zero-emission buses (ZEB)

 

 

 

 

Euro bus
Milestone On The Path Towards Sustainability
Zero-emission bus

RHT operates two ZEB which are fully electric buses with a range of 200-250km after a full night’s charge. They consume an average of 250kWh daily and yield a consumption of 75kWh per km operated.

The 13kWp solar power plant connected to the grid produces an average 36.5kWh daily. These ZEB further ensure lower operating costs and decrease the disposal of waste like used oil and wear-and-tear materials to the extent that 30 litres of engine oil are saved for every 10,000km cycle.
There is also a reduction in consumables related to wear-and-tear parts like clutch discs and clutch booster kits.

The new Euro IV vehicles are also equipped with automatic Voith transmission, which enhances comfort and decreases fatigue among drivers, who stay more alert on the road.

Moving Towards Sustainable Energy

RHT Bus Services Ltd (RHT BS) is currently working on two projects:

  1. Lining bus roofs with around 7sqm of PV film to roughly produce 1.5kW of sustainable energy to power the lead-acid batteries and further reduce the electricity consumption of auxiliaries; and
  2. Conducting research work on introducing a horizontal-axis wind turbine (HAWT) or a vertical-axis wind turbine (VAWT) to produce sustainable energy for operating bus air conditioning systems and powering auxiliaries.

 

 

 

 

 

Wind Turbine
Contribution To Preserving Water Tables
Water recycle

The use of sealed maintenance-free batteries for the past year has contributed to decreasing the rate of battery failures and cracked battery casings, thus eliminating damage caused to water tables through the release of electrolyte to the soil.

Cleaning activities are carried out in a designated area to ensure that there is no water table contamination. Monthly effluent analyses show no deviation from standards prescribed by the Wastewater Management Authority. In the below table providing monthly effluent analysis results, all standards are met except for BOD.

Furthermore, RHT Bus Services Ltd will be equipped with an automatic bus washing machine where all the water used, will be recycled and used again. The amount of potable water will again drop to almost 80% of the 128m³ used monthly.

The recycled water will be channelled through different pipelines to toilet flush and urinal systems, again reducing dependency on potable water.

Waste Recycling

Batteries reaching the end of service life, used oil maintained in steel tanks along with PET bottles are disposed of with the approved service provider.

Rainwater Harvesting

All rainwater from the workshop’s covered sheds is channelled to 5,000 and 15,000 litre water tanks to contribute to reducing the use of potable water.

Energy Consumption

RHT Bus Services Ltd (RHT BS) closely monitors the monthly electricity consumption, which is on a downward trend with the use of highly efficient LED lights, among others. Maximum daily power consumption of 37kW was recently recorded at the RHT Depot.