| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of car washing water wherein sludge water discharged accompanying production of concrete and rainwater are effectively put to practical use. <P>SOLUTION: This car washing water is manufactured by applying filtering treatment, reducing treatment and adsorption treatment to sludge water, which is a supernatant liquid of a concrete sludge water discharged accompanied by washing a concrete product factory or a ready-mixed concrete mixer vehicle and neutralizing rainwater with the obtained alkali solution. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
