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Sewage Treatment Operating Cost Calculator

Date: 2025-11-12
Hangzhou AquaSust Water Technology Co., Ltd.
            Head ofice: #2808, Baiyue Center, Linping, Hangzhou, Zhejiang, China
               M:+86 152 6746 2807 Email: [email protected] website: www.nihaowater.com  www.chinambbr.com
www.aquasust.com www.aquasustfactory.com
Paper Wastewater Operating Cost Calculator
Blue block is the design datameter: be filled in
Brown:calculate process data
Red:last result for your process
I.Basic data:
Designed Water Quantity 35000.00  m³/d
Project COD(mg/l) BOD(mg/l) ammonia nitrogen(mg/l) SS(mg/l) total phosphorus(mg/l)
nlet water quality 1000.00  500.00  100.00  500.00  20.00 
Efluent water quality 50.00  10.00  5.00  10.00 
II.Calculations:
1. Calculation of  labor costs
Total number of people 10.00  people payroll 2000.00  Yuan/month Cost of tonnes of water 0.019  Yuan/Ton
2. Calculation of electricity costs
Running power 1273.00  KW Unit electricity costs 0.50  Yuan/KW.h Cost of tonnes of water 0.436  Yuan/Ton
3. Pre-treatment chemicals cost
PAC addition amount 100.00  ppm unit cost 1350.00  Yuan/Ton Cost of tonnes of water 0.135  Yuan/Ton
Amount of PAM added 12.00  ppm unit cost 15500.00  Yuan/Ton Cost of tonnes of water 0.186  Yuan/Ton
4. Biochemical treatment chemicals
Design Data
Oxidation ditch influent BOD 690.00  mg/l ammonia nitrogen 1.00  mg/l total phosphorus 1.000  mg/l
Required carbon, nitrogen, and phosphorus ratio 100.00  5.00  1.000 
Actual amount of nutrients needed nitrogen source 33.50  mg/l quantity of phosphorus source 5.900  mg/
When phosphorus source is(NH2)2HPO4 Nitrogen content 0.22  phosphorus content 0.24 
(NH2)2HPO4 addition amount 24.58  mg/l unit cost 2300.00  Yuan/Ton Cost of tonnes of water 0.057  Yuan/Ton
When nitrogen source is CO(NH2)2 Nitrogen content 0.43 
CO(NH2)2 additionamount 65.63  mg/l unit cost 1660.00  Yuan/Ton Cost of tonnes of water 0.109  Yuan/Ton
When the phosphorus source is Na3PO4 Purity 0.98  phosphorus content 0.08 
Amount of Na3PO4 added 75.26  mg/l unit cost 2990.00  Yuan/Ton Cost of tonnes of water 0.225  Yuan/Ton
Addition of CO(NH2)2 78.27  mg/l unit cost 1660.00  Yuan/Ton Cost of tonnes of water 0.130  Yuan/Ton
5. Cost of deep treatment chemicals
PAC additive amount 360.00  mg/l unit cost 1350.00  Yuan/Ton Cost of tonnes of water 0.486  Yuan/Ton
Amount of PAM added 2.00  mg/l unit cost 15500.00  Yuan/Ton Cost of tonnes of water 0.031  Yuan/Ton
Addition of ferrous chemicals 600.00  mg/l unit cost 400.00  Yuan/Ton Cost of tonnes of water 0.240  Yuan/Ton
Additive amount of oxidizer 400.00  mg/l unit cost 1000.00  Yuan/Ton Cost of tonnes of water 0.400  Yuan/Ton
Amount of sulfuric acid added 0.00  mg/l unit cost 800.00  Yuan/Ton Cost of tonnes of water 0.000  Yuan/Ton
NaOH additive 0.00  mg/l unit cost 1850.00  Yuan/Ton Cost of tonnes of water 0.000  Yuan/Ton
6. Sludge dewatering chemicals
Ⅰ. Calculationof sludge volume of primary sedimentation tank
Calculation formua W1=Q×(SS removal)-1000÷1000(SS removal mainly refers to the diference between the SS inand ou of the primary sedimertation tank)
Primary dust influent SS 1000.00  mg/ First Dust Out of Water SS 500.00  mg/l sludge quantity 17.500  tons/day
Ⅱ. Calculation of biochemical sludge volume
Calculation formua W2=Q×(BOD removal)×0.3+1000÷1000(BOD removal mainly refers to the diference between the BOD into the oxidation ditch
and the BOD out of the secondary sedimentation tank)
Biochemical tank influent BOD 1000.00  mg/ Secondary Settling Tank Effluent BOD 500.00  mg/l sludge quantity 5.250  tons/day
Ⅲ.The amount of air flotation slag calculation
Calculation formua flotation=△COD*Q*0.6+△SS*Q+PAC*Q*0.46+PAM*Q
nlet water for air flotation COD 0.00  mg/ Air Floatation Efluent COD 0.00  mg/l
Air floatation feed water SS 0.00  mg/l Air foatationefluent SS 0.00  mg/l
Addition of PAC 0.00  mg/l Addition of PAM 0.00  mg/l sludge quantity 0.000  tons/day
Ⅳ.Calculation of chemical sludge volume
Calculation Chemical sludge volume=Q÷10000×(4000~7000) Sludge volume 17.500  tons/day
When Fenton Chemical sludge volume=Q÷10000×6000 Sludge volume 21.000  tons/day
When it is catalytic oxidation Chemical sludge volume=Q÷10000×6000×(0.3~0.4) Sludge Volume 6.300  tons/day
Ⅴ.Total amount of sludge Total sludge volume 67.550  tons/day
PAC addition amount 10.00  kg/per tonof sludge unit cost 1350.00  tons/day Cost per ton of water 0.026  tons/day
Amount of PAM added 3.00  kg/per ton of sludge unit cost 1350.00  tons/day Cost of ton of water 0.008  tons/day
7.Water charges
Total PAC 16.10  tons/day Configuration Concentration 10.00  % Water consumption 161.000  tons/day
Total amount of PAM 0.49  tons/day Configuration Concentration 0.10  % Water consumption 493.000  tons/day
Total amount of oxidizer 14.00  tons/day Configuration Concentration 30.00  % Water consumption 46.667  tons/day
(NH2)2HPO4 addition amount 0.86  tons/day Configuration Concentration 50.00  % Water Consumption 1.721  tons/day
Amount of Na3PO4 added 2.63  tons/day Configuration Concentration 50.00  % Water Consumption 5.268  tons/day
Amount of urea added when the
phosphorus source is(NH2)2HPO4
230  tons/day Configuration Concentration 50.00  % Water Consumption 4.594  tons/day
Amount of urea added when the
phosphorus source is Na3PO4
2.74  tons/day Configuration Concentration 50.00  % Water Consumption 5.479  tons/day
Total water volume
(whenphosphorus source is(NH2)2HPO4)
36.38  tons/day Price of tons of water 3.67  Yuan/per ton of water Cost of tons of water 0.004  Yuan/ton of water
Total water volume
(whenphosphorus source is Na3PO4)
36.83  tons/day Price of tons of water 3.67  Yuan/per ton of water Cost of tonof water 0.004  Yuan/ton of water
8.Anaerobic treatment chemicals
Design Data
Anaerobic influent BOD 5000.00  mg/l Ammonia Nitrogen 50.00  mg/l Total Phosphorus 1.000  mg/l
Required Carbon,Nitrogenand
Phosphorus Ratio
300.00  5.00  1.000 
Actual amount of nutrients needed Nitrogen source 33.33  mg/l Phosphorus Source Volume 15.667  mgl
When the phosphorus source is(NH2)2HPO4 Nitrogen content 0.22  phosphorus content 0.24 
( NH2)2HPO4 additive quantity 65.28  mg/l unit cost 2300.00  Yuan/Ton Cost per ton of water 0.150  Yuanton of water
Whenthe nitrogen source is CO(NH2)2 Nitrogen content 0.43 
CO(NH2)2 additive quantity 44.33  mg/l unit cost 1660.00  YuanTon Ton of water cost 0.074  Yuan/ton of water
When the phosphorus source is Na3PO4 Purity 0.98  phosphorus content 0.08 
Na3PO4 additive quantity 199.83  mg/l unit cost 2990.00  Yuan/Ton Ton of water cost 0.597  Yuan/ton of water
CO(NH2)2 additive quantity 77.88  mg/l unit cost 1660.00  YuanTon Ton of water cost 0.129  Yuan/ton ofwater
Backwash air volume strength
Water flushing strength

Indicators of water consumption per ton Daily consumption Cost(Yuan/tonne of water)
1abor cost 10.00  human 666.67  Yuan 0.019 
Electricity consumption 0.87  kwh 30552.00  kwh 0.436 
Consumption of pre-
treatment chemicals
PAC 0.10  kg 3500.00  kg 0.135 
PAM 0.01  kg 420.00  kg 0.186 
Anaerobic nutrient salt
consumption
(NH2)2HPO4 0.07  kg 2284.72  kg 0.150 
CO(NH) 0.04  kg 1551.47  kg 0.074 
Na3P04 0.20  kg 6994.05  kg 0.597 
CO(NH)2 0.08  kg 2725.86  kg 0.129 
Oxidation ditch nutrient
salt consumption
(NH2)2HPO4 0.02  kg 860.42  kg 0.057 
CO(NH)2 0.07  kg 2297.22  kg 0.109 
Na3PO4 0.08  kg 2633.93  kg 0.225 
CO(NH)2 0.08  kg 2739.49  kg 0.130 
Deep treatment drug
consumption
PAC 0.36  kg 12600.00  kg 0.486 
PAM 0.00  kg 70.00  kg 0.031 
hydrogen peroxide(H202) 0.40  kg 14000.00  kg 0.400 
Ferrous salts 0.60  kg 21000.00  kg 0.240 
Sludge Dewatering PAM Consuption 3-5 kg/ton dry sludge 3.00  kg 0.008 
Sludge dewatering PAC consumption 10-15 kg/ton dry sludge 10.00  kg 0.026 
Total 3.438 

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