Method for recycling aqueous paint

A method of recycling aqueous paint, comprising:

• in a recycling system having
• (i) a coating booth,
• (ii) a booth circulation water bath,
• (iii) a condensation bath,
• (iv) an ultra-filtration apparatus,
• (v) a paint tank,
• (vi) a setting tank, and
• (vii) a rinse tank,
• spray-coating an article with aqueous paint in said coating booth;
• using a water curtain in said coating booth to collect over-spray paint that does not adhere to said article;
• passing said over-spray paint and water of said water curtain into said booth circulation water bath so as to convey a mixture of said over-spray paint and water into said condensation bath;
• using said ultra-filtration apparatus to separate said mixture into condensed paint and filtrate;
• conveying said condensed paint into said paint tank;
• if necessary, removing said condensed paint from said paint tank for adjustment thereof and using this adjusted condensed paint for aqueous paint to coat an article;
• storing booth circulation water in said settling tank;
• storing a portion of said filtrate in said rinse tank;
• conveying said portion of said filtrate from said rinse tank into said ultra-filtration apparatus so as to rinse said ultra-filtration apparatus;
• and
• controlling to be constant during the spray-coating of said article with said aqueous paint, a sum of Vw+Vx+Vy+Vz+Vs+Vt,
• with Vw being equal to a volume of water in said booth circulation water bath, Vx being equal to a volume of said filtrate not in said rinse tank, Vy being equal to a volume of said mixture of said over-spray paint and water that is within said condensation bath, Vz being equal to a volume of said condensed paint in said paint tank, Vs being equal to said booth circulation water in said settling tank and Vt being equal to a volume of said portion of said filtrate in said rinse tank.