Trial Running Debuging And On-site Experimental Study In Binchuan No.2 Waterworks Of Western Small Towns

Binchuan No.2 waterworks project is a demonstration project of the FTEI project, trial running and experimental study of the waterworks will ensure to provide safe, reliable, high-quality drinking water when the project completed for the region, and it also provide material and technical support and guarantee for the latter achievements diffusion of the project FTEI.During trial running debugging and experimental, after completing the structures water filling test and related equipment and instrument debugging of the waterworks, according the process called for to execute the PAC on-site experiment, and collected the experimental data of on-site to establish a PAC automatic dosage mathematical model, and investigated its effect, complete the pre-oxidation KMnO4 on-site experiment during the period of the relatively poor quality of raw water. Debugging and experimental study was also on the chlorination system, grid flocculation - inclined tube sedimentation tank and discharge mud system. Finally, analyzed and discussed the on-site costs, operating costs, power consumption and drug consumption of Binchuan No. 2 waterworks.PAC dosage mathematical model of Binchuan No. 2 waterworks: M=K(7×10-6T 3 -2.6×10-3T 2+0.3255T +5.2221) R 2=0.9816, the on-site shown that the model is verified with actual on-site, the effect is stable. PAC on-site continuous running shown that: the turbidity removal rate is 80.8% ~ 96.6%, with an average of 91.1%; CODMn removal is between 14.3%and 32.3%, and the average removal rate was 22.7%; NH4+-N removal rate in the range of 12.5% to 27.3%, with an average removal rate of 18.9%, although the CODMn and NH4+-N removal rate is a little low, but the quality of the raw water is well, the water can generally up to standard GB-5749.KMnO4 pre-oxidation treatment has well removal efficiency on CODMn, UV254, NH4+-N, algae and manganese. On the conditions of on-site continuous running, the raw water CODMn is 2.56 to 3.31mg/L, NH4+-N 0.13 to 0.20mg/L, after KMnO4 pre-oxidation, the effluent water CODMn is 1.44 to 1.97mg/L, with an average removal rate of 43.8%, NH4+-N 0.08 to 0.12mg/L, with an average removal rate of 39.8%.After waterworks normally running, when the turbidity of the water is about 25 NTU, discharge mud one time a day for flocculation-sedimentation tanks, when the raw water turbidity is more than 50NTU, discharge mud two times a day for flocculation - sedimentation tanks, and the turbidity of sedimentation tank effluent is about 2NTU, and the water quality is stable. The discharge mud times should accord to the actual situation, when the raw water turbidity and water flow change suddenly. The time is about 20s for every mud valve.Chlorine dosing is 1.2mg/L to1.4mg/L, after supplying water normally, the effluent water turbidity is 0.1NTU~0.5NTU, with an average of 0.3NTU, and the color is an average of 2(Pb-Co), average pH value is 7.5, and the average residual chlorine is 0.35mg/L, the total number of bacteria from is 0 to 10CFU/mL, with an average of 2CFU/mL, coliform is 0, the other water-quality index meet "drinking water health standards "(GB5749-2006).In Binchuan No.2 waterworks, the unit on-site cost is 1.13Yuan/m3, unit operating costs is 0.76Yuan/m3, and the chemical consumption unit is 0.07Yuan/m3, unit power consumption is 0.03Yuan/m3. Therefore, the process has certain economic advantages of the western region of small towns and it has good usability.