Analysis of Production and Operation Costs of Wastewater Treatment Plants in Dry Season Based on Fishbone Diagram
This paper took Dongguan's wastewater treatment plants(WWTPs)during the dry season as the research object,and analyzed their inflow volume,water quality,and production and operation costs.Results showed that the average monthly load of 8 WWTPs in January was only 64.32%,of which 4 had a load below 60%;The inlet water quality could be good biochemical and met the requirements of biological phosphorus removal.However,only one WWTP had an influent BOD5/TN value greater than 4,indicating that most WWTPs were facing the problem of insufficient influent carbon source.In addition,the direct cost per ton of water(tap water fee,electricity fee,raw material drug consumption,and sludge disposal fee)of 8 WWTPs was relatively high,at 0.59 yuan/m3.Through the fish bone analysis method,it could be intuitively demonstrated that the main reasons for the cost increase of WWTPs in January were the increase in electricity consumption,carbon sources,phosphorus removal agents,and dry mud medicine consumption.In order to reduce the direct per ton water cost of WWTPs during the dry season,in response to the problems of high power consumption,large dosage of water treatment chemicals,and high consumption of dry sludge chemicals analyzed by the fishbone diagram,measures were proposed from the aspects of aeration,dosage,operation process,and equipment facilities,while ensuring the normal and stable operation of wastewater treatment facilities.It provides new ideas for energy saving and consumption reduction of other low load rate WWTPs.
wastewater treatment plant(WWTP)dry seasonfishbone diagramproduction and operation costsenergy saving and consumption reduction
国家科技期刊平台
NSTL
万方数据
维普
