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 processes are optimized and combined, and the utilization of geothermal resources of
plant areas is fully considered, so that an enhanced
conventional treatment system is formed. The combined process has the advantages that used land can be saved, the process can be optimized, the geothermal resources can be fully utilized, the production management can be simplified, and the
water quality of the outlet water has obvious advantages.