4-22SEWAGEDISPOSALANDENVIRONMENTALSANITATION(1978-2014YearLengthSewageSewageVolumeofHarmlessofTreatmentTreatmentRecycledDisposalSewageCapacityRateWaterCapacityofPipes(10000UsedDomesticWaste(km)cu.m/day)(%)(10000cu.m)(ton/day)1978290237.619793092310.21980334239.419813472510.819823652510.919834112510.219845682510.019857062510.0198...