diff --git a/src/main/java/org/matsim/prepare/commercial/DefaultDemandPerDayCalculator.java b/src/main/java/org/matsim/prepare/commercial/DefaultDemandPerDayCalculator.java
index 2840ef5..99770a7 100644
--- a/src/main/java/org/matsim/prepare/commercial/DefaultDemandPerDayCalculator.java
+++ b/src/main/java/org/matsim/prepare/commercial/DefaultDemandPerDayCalculator.java
@@ -53,12 +53,12 @@ public int calculateWasteDemandPerDay(Person freightDemandDataRelation) {
         }
 		//if zone has a waste collection on this day, calculate the demand
         if (zonesWithWasteCollectionsOnThisDay.get(destination).contains(originCell)){
-            int numberOfCollectionsPerWeek = 1;
-            double kilogramsPerDay = 0;
-                double tonsPerYear = CommercialTrafficUtils.getTonsPerYear(freightDemandDataRelation);
-                kilogramsPerDay = tonsPerYear * 1000 / (52 * numberOfCollectionsPerWeek);
-                kilogramsPerDay = Math.floor(kilogramsPerDay + this.rnd.nextDouble());
-            return (int) kilogramsPerDay;
+			int numberOfCollectionsPerWeek = 1;
+			double shareOfPersonalWaste = 0.15; //TODO the current matrix has a wrong demand, because the tons per year are inclusive commercial/construction waste -> the share of personal waste is 0.15
+			double tonsPerYear = CommercialTrafficUtils.getTonsPerYear(freightDemandDataRelation) * shareOfPersonalWaste;
+			double kilogramsPerDay = tonsPerYear * 1000 / (52 * numberOfCollectionsPerWeek);
+			kilogramsPerDay = Math.floor(kilogramsPerDay + this.rnd.nextDouble());
+			return (int) kilogramsPerDay;
         }
         return 0;
     }