Combined enhanced treatment process for low-turbidity high-alga raw water

• Main Authors: FAN YUZHU, XU JIAJIONG, JIN XIAOYUN, LEI TING, WU YIJUN, ZHENG ZHIMIN, ZHENG GUOXING
• Format: Patent
• Language: Chinese; English
• Published: 19.09.2012
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a combined enhanced treatment process for low-turbidity high-alga raw water. The treatment process is characterized in that according to raw water, the turbidity in winter is about 5NTU, and temperature less than 5 DEG C, or one liter of raw water contains more than one million algae in summer, and the treatment process comprises the following steps of: settling under the conventional condition by using a flocculation horizontal sedimentation tank or a high-efficiency sedimentation tank, performing air floatation by using an air floatation tank to remove algae, allowing outlet water to flow through an ultra filter membrane further to reduce turbidity and remove algae, adjusting storage by using a clear water tank, and feeding into a water distribution network by using a water feeding pump house. According to the low-turbidity and high-alga characteristics of the water quality of the raw water, the conventional coagulating sedimentation, air floatation, filter and ultra filtration proce