Advetec Holdings Ltd

Advetec Holdings Ltd

Food and General Waste Hotel & Restaurant England, United Kingdom Case Study

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Courtesy of Advetec Holdings Ltd

The Centurion Best Western is a large resort that incorporates a hotel, restaurant, golf course and spa. The companyrun events including weddings, parties, meetings, and other functions which generate waste, e.g. food waste, tissue, plastic,paper, etc... Before the purpose built XO was installed, 4 individual 1100 litre bins were collected twice a week, incurringa high annual waste disposal cost, which is only increasing year on year

Details

Objectives
The aim for this client is to use the XO reactor to digest the waste created from the resort. This will reduce the waste mass and volume, their carbon footprint, and improve their environmental image in the process. The monitoring of this XO reactor includes measurements for gas emissions, waste input, digestate output, and temperature logs which have all been used to assess and improve the performance. Calculations based on this data reveal what achievements have been accomplished.

Implementation

The XO reactor at this location was installed 06/01/2017 and is a purpose built machine with a capacity of approximately 0.3 tonnes of waste a day, giving a theoretical annual capacity of 109.5 tonnes. The power draw during normal operation is just 3kWh, for 24 hours a day, 365 days a year. The 15 bin bags featured below are from the Centurion. They were reduced to one bag of digestate, shown in the bottom image

Results

The month of June 2017 saw the XO loaded with 1541.29kg of shredded waste, discharging 425.24kg under the normal residency period of 72 hours. This equates to a 72.41% decrease in mass; showing significant waste reduction. During the rst four months, experiments with the residency time were trialled where the time the biomass inhabited the machine was reduced from 72 hours to 24 hours, this gave a slightly lower average reduction rate of 60.25%. The rapid waste reduction is achieved by exothermic reactions from Advetec’s bespoke blend of micro-organisms. The average core temperature inside the machine was measured at 50.26 degrees centigrade. This promotes  high  waste  reduction  rates,  and  based  on  the  current  performance  of  the  Centurion’s  machine,  the  theoretical  monetary savings could exceed 54% when compared to the cost of landll. In addition, the gas measurements from this machine reveal an 87% reduction  in  CO2 levels  compared  to  sending  the  same  mass  of  MSW  to  landll;  this  massively  reduces  the  Centurion’s  carbon footprint.  Since  the  XO’s  installation,  the  Centurion  have  declared  there  are  no  longer  any  ies,  and  there  is  a  reduced  odour  in comparison  to  using  waste  bins.  The  problem  of  unaesthetic  mounds  of  black  bag  waste  has  also  been  solved  using  this  machine. Furthermore, the digestate analysis revealed a high nutrient levels and a caloric content of 18.6MJ/kg, meaning the digestate can be used as a fuel source for biomass burners, or alternatively sold for composting

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