Discussion on the operating mode of ozone biological activated carbon process under the high-quality water source
In response to the issue of how to manage the ozone biological activated carbon(O3-BAC)process well and reduce energy consumption in water plant production after introducing high-quality raw water in water plants,under the premise of ensuring treatment water quality safety and reliable equipment and facilities,production experiments were conducted on the O3-BAC for de-commissioning and low flow operation at J and N water plants,with a focus on analyzing the im-pact of stopping O3-BAC on water treatment efficiency,carbon filters,and key equipment.Prelim-inary discussions were also conducted on the operation of O3-BAC at low flow rates.The results indicate that under the condition that the raw water is a high-quality water source,if O3-BAC is stopped,the aluminum content in the treatment water will increase when the conventional treat-ment is used to treat high pH raw water.Within 45 days of deactivation of carbon filter,the micro-bial activity on the filter material sharply decreased,and after 65 days of restart,it only recovered to 64％of the level before deactivation.After the carbon filter is restarted,the ammonia content in effluent(measured as N)shows a increase followed by a decrease,and the growth increases with the extension of stop time,reaching a maximum of 0.7 mg/L,and stable after 24 hours.The downtime is less than 6 months,and there is no significant change in the performance of key equip-ment such as intermediate lifting pumps.If O3-BAC is operated at low flow rate(exceeding water by about 60％),the electricity and oxygen consumption of N water plant have decreased by 8.80％and 28.72％respectively.
High-quality water sourceReduce energy consumptionOperating modeMicrobial activityOperation of O3-BAC at low flow rates
万方数据
维普
