DECOLORATION OF COLORED WASTE WATER

• Main Authors: MORI TATSUMA, SAKIMOTO MICHIO, MORI TADAAKI
• Format: Patent
• Language: English
• Published: 16.06.1998
• Edition: 6
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To obtain an sufficient decoloration effect over a long period by penetrating colored waste water and more preferably, the waste water of livestock farming of a brow color subjected to a purification treatment into andosol which is volcanic soil. SOLUTION: When the chromatic waste water is penetrated into the andosol 5, the soil particles adsorb the coloration components contained in the chromatic waste water and decolor the chromatic waste water. When the penetration rate of the chromatic waste water is limited to <=60ml per 1g andosol at this time, the decoloration rate of the waste water attains >=60% and the decoloration effect sufficient for practicable use is exhibited. The reason why the andosol 5 exhibits the adsorption effect in such a manner is estimated to line in that the andosol contains much allophane and that the adsorption by an anion exchanger is actively effected. The andosol 5 varies in adsorption capability by the areas where the andosol is distributed. The andosol 5 which is distributed particularly in the Sannin district of Japan and contains much humus exhibits the excellent adsorption capability.