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Tank Cleaning, a necessary evil?

In the public opinion tank cleaning is a dangerous, dirty and polluting business. However, most of the tanks cleaning installations utilise very sophisticated waste water treatment plants, to overcome these issues. A second aspect of tankcleaning is the fact that dedicated transport can be avoided. Dedicated means that the same product is transported in a tank and assumes an empty return to the loading place after unloading.

The calculations below make the difference between an average tankcleaning consuming 2m³ hot water with 250 km of empty kilometers of a truck to drive additionally in case of dedicated transport. The CO2 emissions are calculated with the CO2 meter of the Belgian authorities. Finally the total CO2 emission saved per year is calculated for all tank cleanings in Europe assuming to be at least 2.000.000 each year.

General data

 
Efficiency heating (%) 90%
Heating value of fuel (%) 85%
Efficiency HP pump 80%
Average water consumption / tank cleaning (m³) 2
kW pump (100 ltr/min, 100 bar) 19,4
Electricity consumption WWT / m³ (kWh) 4,81
Delta T water (°C) 75

 

CO2 Production

Source: CO2-meter LNE (Belgian authorities)
 
Electricity (kg CO2/kWh) Gas (kg CO2/kWh) Gasoline(kg CO2/l)
0,76         0,18            2,64
 
Per tank cleaning  Consumption Production of CO2   (kg)
Energy consumption for heating tank cleaning water (kWh)      228,04           41,82
Electricity consumption HP Pump (kWh)         8,08             6,14
Electricity consumption WWT (kWh)         9,62             7,31
Waterconsumption (m³)         2,00             0
TOTAL / TANK CLEANING                55,28
 
Dedicated Transport (1 trip)   Production CO2 (kg)
Dieselconsumption truck (l / 100 km)           30  
Average amount of empty kilometers         250         198
EXTRA CO2 EMISSION DEDICATED TRANSPORT             143
 
 Tankcleaning in Europe (2.000.000 tank cleanings per year estimated)      Extra km Production of CO2 (kg) 
Tank Cleaning        110 553 851
Dedicated transport  500 000 000      396 000 000 
CO2 EMISSION SAVED BY TANK CLEANING:        285 446 149