Residents

The residents of the Netherlands aren't aware of the water scarcity. Dutch residents think that there is plentiful drinking water, this emerged from a study by Vitens. Dutch people think that they use an average of 60 liters each day, but in truth, it is 120 liters each day. Three out of four residents find water-saving important, but from a survey approx 50% don’t want to shower shorter. And one out of three don't use the water-saving button on the toilets.

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Acceptance

[/vc_column_text][vc_empty_space height=”50px”][vc_column_text]The plan is to re-use used Drinkwater and rainwater. If this plan is possible and succeeds the residents must accept the mindset of re-using Drinkwater en rainwater. The residents are therefore central in the CAWN-concept. The residents must assess the CAWN-concept is an option. The CAWN-concept has three minimum requirements to be met. The three requirements are acceptance, behaviour and cost.    

 

The first important step of the acceptance of residents is the name of the re-used water. For example, the name re-used wastewater. Re-used wastewater sounds a little bit like dirty water, an attractive name is therefore important. Today in the Netherlands, it is not usual to re-use drinking water and rainwater. Because of that, it is difficult to chance the Dutch mindset. The thoughts about re-using drink water are, that you used the wastewater of your neighbour’s showers, washing machine, and sink. With the CAWN-concept has re-using water become a new way to use used drink- and rainwater. Because it’s a pilot project it is not an easy way to introduce reusing projects at residents. There is not just reference information of Dutch projects about re-using water. The target of the concept ‘re-using water’ is to search for it is possible and whether there is a further in it. With the new information, there can come maybe more research about re-using water.    

 

In addition to acceptance, behaviour is also an important requirement. The behaviour can be divided into two parts, unavoidable and desired. Unavoidable behaviours are vandalism and incorrect use of food waste points, recirculation showers, water-saving toilets, shared laundry and shared carwash. Because it’s all-new for the residents, they maybe don’t know how it works. For this problem, there is a solution to make instructional videos for residents. The second behaviour point is desired. The term ‘desiredrefers to whether residents use biodegradable detergents and cleaning agents and where residents can walk with their dog(s).  

 

The last requirement is the cost for residents. Does the closed water cycle have an impact on the accounts of residents? This question needs to be answered. It concerns the water bill, municipal tax energy bill, water board and purification tax. The cost also includes GFT waste and the use of detergents and cleaning products 

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Recirculation shower

[/vc_column_text][vc_separator type=”normal”][vc_column_text]Recirculation showers use 2,5 litre per minute. The average shower time is 8,1 minutes, that comes out on a result of 20,3 litre each shower turn. The normal water using a shower turn is 70,5 litres. 

In the tree experiment houses comes the recirculation shower. In the apartments and the houses, there are coming water-saving showers. Water-saving showers use 55,9 litre each average shower turn. The water-saving showers must ensure that the water demand decrease of drink water.    

The shower behaviour of the residents with the recirculation shower is tested. The elements that are tested are, for example, the duration of showering, changing showerheads and maintenance. The results are compared with the water-saving and energy consumption
Besides, the residents must also assess the recirculation shower. It is exciting whether a recirculation shower is accepted by people in the Netherlands.  

In the other houses, water-saving showers are installed. It remains to be seen what the effect of the water-saving showers will be. The water-saving showers may have a rebound effect on residents. Because the shower consumes less heat and water, people may think about taking a long shower. [/vc_column_text][/vc_column][vc_column width=”2/12″][/vc_column][vc_column width=”5/12″][vc_column_text]

Water-saving toilets

[/vc_column_text][vc_separator type=”normal”][vc_column_text]Water-saving toilets use only 1 litre each flush, instead of 7 litres per flush. The intention is to decrease the drink water demand with water-saving toilets
Next to the water-saving, the water-saving toilet has a smaller pipeline, there isn’t ventilation required, a lower opportunity of blockage and lower risk of pathogens than a usual toilet.   

The discharge of the water-saving toilets calls we black water. What the black water opportunities are can be read in the play of black water.  

A new kind of toilet is, of course, getting used to something else than we know. People know the water-saving toilets of the aeroplanes, but the water-saving toilets in the apartments and houses are silent water-saving toilets. If one uses these toilets often, it becomes normal. [/vc_column_text][/vc_column][/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column][vc_empty_space height=”150px”][/vc_column][/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” css=”.vc_custom_1575991963785{border-top-width: 30px !important;border-right-width: 30px !important;border-bottom-width: 30px !important;border-left-width: 30px !important;padding-top: 50px !important;padding-right: 50px !important;padding-bottom: 50px !important;padding-left: 50px !important;background-color: #ffffff !important;}” z_index=””][vc_column width=”5/12″][vc_column_text]

Food waste points

[/vc_column_text][vc_separator type=”normal”][vc_column_text]The experiment houses and the ground-level houses will be given a food waste point in the house. For the apartments, there are common food waste points. Each floor will have a food waste point in the stairwell. The two different variants can be compared with each other. It is possible to look at the behaviour of residents and their use. At the food waste points, the behaviour of the residents is important. Residents must not throw incorrect objects or substances and the food waste point must be properly maintained.
In addition to looking at how residents react to food waste points, we also look at technical points. The technical points include the number of blockages and breakdowns, purchase and maintenance costs, energy and raw material recovery, and savings in the management of vegetable, fruit and garden waste.  

The crushes system relates to the vacuum sewer. The sink must be 1,5 times bigger because of the crushes system. The food waste points are easy to remove from the kitchen after the test.   

The discharge of the food waste point calls we black water. What the black water opportunities are can be read in the play of black water. [/vc_column_text][/vc_column][vc_column width=”2/12″][/vc_column][vc_column width=”5/12″][vc_column_text]

Shared laundry and carwash

[/vc_column_text][vc_separator type=”normal”][vc_column_text]Why should we use drink water for laundry and carwash?  The water demand peak can be flattened with re-using drink water and filter it to wash water. With the shared laundry and carwash function there are fewer laundries needed and lesser wash water. More connections to one network mean that fewer pipes are needed. The comment launderette does not require residents to purchase their own washing machine. If residents do want to, this is possible.  

The aim of shared laundry and car wash is to reduce drinking water consumption and to use a new water source. The new water source must become grey water. 

The behaviour of the residents about the shared laundry can be opposite in the beginning. It is a strange idea to wash your clothes in re-used water of your neighbours.  [/vc_column_text][/vc_column][/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column][vc_empty_space height=”150px”][/vc_column][/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” css=”.vc_custom_1575991990553{border-top-width: 30px !important;border-right-width: 30px !important;border-bottom-width: 30px !important;border-left-width: 30px !important;padding-top: 50px !important;padding-right: 50px !important;padding-bottom: 50px !important;padding-left: 50px !important;background-color: #ffffff !important;}” z_index=””][vc_column width=”5/12″][vc_column_text]

Smart water meters

[/vc_column_text][vc_separator type=”normal”][vc_column_text]The minimum requirement that has been set is, that the water pipeline of the ground-bound houses and the pipeline of the apartment building has a smart water meter. With the smart water meters, the water demand can be mapped of different types of houses. Every house has a water meter.  Each of the three experimental houses will have a smart water meter to monitor the water-saving techniques. Only the pilot houses will get a smart water meter because it is very expensive to install it everywhere.  The minimum requirement is to install one smart water meter on the pipeline to the ground-level house and one smart water meter on the pipeline to the flat.    

The smart water meters must map the consumption of water. This should show how much water is saved and whether different types of homes result in different water consumption. In addition to the water consumption in the houses and apartments, water is also used in communal areas.  

A smart water meter is also placed in the supply pipe of the communal facilities. The water behaviour of residents can be measured here. [/vc_column_text][/vc_column][vc_column width=”2/12″][/vc_column][vc_column width=”5/12″][vc_column_text]

Experiment houses

[/vc_column_text][vc_separator type=”normal”][vc_column_text]The CAWN-project has three experiment houses. The test houses are there for more details and results about the household techniques. Standard water-saving toilets, recirculation showers and water-saving food grinders are installed in the experimental houses. The recirculation showers are only used in the experimental houses. For more details about the water consumption per different household techniques, there will be a smart water meter in each experiment house.   [/vc_column_text][/vc_column][/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column][vc_empty_space height=”150px”][/vc_column][/vc_row]