Method for decolorizing and recycling waste water from xylose production

• Main Authors: ZHANG JIE, HAN XIAOHANG, QIN QUANSHENG, CHENG LIMIN
• Format: Patent
• Language: Chinese; English
• Published: 04.05.2011
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a method for decolorizing and recycling waste water from xylose production, which comprises: adding decolorizing agent into the waste water from xylose production, and quickly stirring for 1 second; delivering the waste water to a floatation tank mixer by a conveying pump, adding coagulant in a static mixer arranged at the outlet of the conveying pump till the coagulant concentration in the waste water reaches 50 to 100mg/l and allowing the coagulant to react in the mixer for about 1 second; adding flocculant till the flocculant concentration in the waste water is 10 to 90mg/l, reacting for about 2 to 3 seconds, and delivering the waste water to the floatation tank; and in the floatation tank in which alumen ustum and microscopic bubble float up together, removing floating mud by using a mud scraper, and discharging clear water from the middle of the floatation tank for recycling. In the method, the design is reasonable, the cost is low, the operation is convenient, and the treatment i