The greywater management by treating and reusing is an important issue to provide a new source of water that will not cost as much as using clean water.In general,the water demand in the world is increasing with the i...The greywater management by treating and reusing is an important issue to provide a new source of water that will not cost as much as using clean water.In general,the water demand in the world is increasing with the increased population,thus it can lead to a water crisis.To reduce the effect of this problem,greywater treatment system can be applied.The greywater in schools is gone to waste every single day,so to provide a logical,cheap and effective solution to manage this problem is to treat and reuse greywater in irrigation,since it does not necessarily need clean water.The aim of this manuscript is to manage and reuse the greywater to reduce the water crises,design an economical greywater system that will act as an investment to the school,and decrease the pressure on sewage system.The paper also aims to identify the wastewater characteristics generated from schools.Therefore,three samples of greywater from water basins and three samples from the kitchen were collected to test and analysis.The analysed parameters are BOD(Biochemical Oxygen Demand),COD(Chemical Oxygen Demand),pH,SO4,TDSs(Total Dissolved Solids),Cl,turbidity,Ca,Mg,NO3 and TH(Total Hardness).The results showed that,the samples collected from the basins are in the accepted range,however the samples of the kitchen have a higher concentration in SO4,BOD,turbidity and nitrate,therefore the greywater generated from the kitchen has been excluded from the greywater system.In terms of the cost,the results indicated that the payback cost could be returned in three years.展开更多
文摘The greywater management by treating and reusing is an important issue to provide a new source of water that will not cost as much as using clean water.In general,the water demand in the world is increasing with the increased population,thus it can lead to a water crisis.To reduce the effect of this problem,greywater treatment system can be applied.The greywater in schools is gone to waste every single day,so to provide a logical,cheap and effective solution to manage this problem is to treat and reuse greywater in irrigation,since it does not necessarily need clean water.The aim of this manuscript is to manage and reuse the greywater to reduce the water crises,design an economical greywater system that will act as an investment to the school,and decrease the pressure on sewage system.The paper also aims to identify the wastewater characteristics generated from schools.Therefore,three samples of greywater from water basins and three samples from the kitchen were collected to test and analysis.The analysed parameters are BOD(Biochemical Oxygen Demand),COD(Chemical Oxygen Demand),pH,SO4,TDSs(Total Dissolved Solids),Cl,turbidity,Ca,Mg,NO3 and TH(Total Hardness).The results showed that,the samples collected from the basins are in the accepted range,however the samples of the kitchen have a higher concentration in SO4,BOD,turbidity and nitrate,therefore the greywater generated from the kitchen has been excluded from the greywater system.In terms of the cost,the results indicated that the payback cost could be returned in three years.
