基于HACCP体系的水厂投加系统的风险管理

Risk Management of WTP Chemical Dosing System Based on HACCP System

水厂投加系统的安全风险严重影响整体的正常运行,是水厂风险管理的重点,若采用事后控制的措施进行风险管控,会对水厂运行带来较大的管理风险。以水厂常规投矾加氯系统为例,通过技术分析手段,简要论述了危害分析和关键控制点(HACCP)体系在水厂投加系统风险管理的具体应用。结果显示,常规水厂的投加系统一般包括7个关键控制点,其中投矾系统要注意铝、浑浊度超标、断药等4个控制点;加氯系统要关注微生物、余氯超标等3个控制点。文中结合技术理论分析和HACCP体系构建制定了投加系统HACCP计划表,总结了通过投加设备PID改造、调整投加工艺和新建消毒池等降低投加系统管理风险的手段,对于提高供水安全保障有一定的借鉴意义。

The safety risk of the water treatment plant(WTP)dosing system seriously affects the overall normal operation and it is the focus of the risk management of WTP.If the risk management and control measures are adopted after the event,it will bring greater management risks to the operation of WTP.With polyaluminium chloride and sodium hypochlorite dosing system as an example,by means of technical analysis,it briefly discussed the hazard analysis and critical control points(HACCP)system in WTP dosing system concrete application of risk management.Results showed that the dosing system of conventional WTP generally included seven key control points,of which the dosing system of polyaluminum chloride should pay attention to four control points such as aluminum,turbidity exceeding the standard,and drug discontinuation and so on;the sodium hypochlorite dosing system needed to pay attention to three control points such as microorganisms,excess chlorine and so on.Combined with technical theoretical analysis and HACCP system construction,the paper formulated the HACCP plan for the dosing system,and summarized the means to reduce the management risk of the dosing system through the PID transformation of the dosing equipment,the adjustment of the dosing process,and the construction of a new disinfection tank.It has certain reference significance for improving the security of water supply.