Energy self-sufficient Semi-central Supply and Treatment Centre

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1 Energy Water Scarcity self-sufficient and Urbanisation Semi-central in China Supply and Treatment Centre Example Challenges Qingdao and possible Solutions Energy self-sufficient Semi-central Supply and Treatment Centre Referent: Dipl.-Ing. Michael Leinhos 1

2 Experience in China Consulting: Since 1995, e.g.sewage Disposal Project Chamdo / Tibet (KfW) Training: Sino-German WWTP Training Programme (KfW) 2

3 Research: Cooperative Project TP2A: Semi-centralized supply and disposal systems for urban areas in China Sponsoring Agency: Project Partner: 3

4 Schematic diagramm 4

5 Assumptions for Process Calculation Basic data - water, wastewater total water amount 109 l/(c*d) greywater 41 l/(c*d) blackwater 68 l/(c*d) reuse of treated greywater 33 l/(c*d) specific maximum loads( blackwater and waste) COD 100 g/(c*d) BOD 50 g/(c*d) SS 56 g/(c*d) N 16 g/(c*d) P 2,1 g/(c*d) 5

6 Overview of Concept Toilet Flushing Greywater Storage Tank Pretreatment MBR UV, CL Desinfection Storage Tank Reuse Disposal Excess Sludge Blackwater Mechanical Treatment SBR UV Desinfection Discharge Disposal Process Water Filtrate Primary Sludge Excess Sludge LKW Waste Waste/ Sludge Treatment Heat Electrical Energy Digestate Recovery/ Disposal 6

7 Effluent Standards 1) Effluent Standard Greywater (GB ) BSB5 10,0 mg/l NH4-N 10,0 mg/l Turbidity 30,0 NTU 2) Effluent Standard Blackwater (1A of GB ) BSB5 10,0 mg/l COD 50,0 mg/l NH4-N 5,0 (8,0) mg/l Pges 0,5 mg/l 7

8 Assumptions for cost - benefit calculation 1) Size of systems Semi-centralized WWTP: PE Extension of Centralized WWTP PE distance to Centralized WWTP 10 km 2) exchange rate 1 = 9,0 RMB 3) costs for land Semi-centralized system - land for residential areas 270 Y/m2 centralized system - land for industrial use 600 Y/m2 4) energy costs electrical energy: 0,74 Y/kWh 8

9 Assumptions for cost - benefit calculation 5) costs for drinking water current water price: 2,5 y/m3 6) maintenance costs civil maintenance: 0,3% of the civil investment costs /a M & E maintenance: 1% of M& E investment costs /a 7) labour costs 400 /employee/month 9

10 Assumptions for cost - benefit calculation 8) Financial factors real interest rate: 2% duration: 25 a reinvestment M & E-equipment: 50% of M& E investment costs after 12,5 a 9) Transport distance to dumping area: 20 km truck capacity : 8 t/truck (truck with standard container) truck costs: 0,6 /km 10)New landfill disposal costs: 20 /t 10

11 Economy Net Present Value 11

12 Economy 12

13 Self Sufficency of the Treatment Centre Electrical Energy Demand 6500 KWh/d Electrical Energy Production 8500 KWh/d Surplus 2000 KWh/d 13

14 Feasibility: View 14

15 Schematic diagramm 15

16 Component: Grey Water Treatment 16

17 Component: Black Water System 17

18 Component: Bio Waste Pre-Treatment 18

19 Component: Sludge Treatment 19

20 Odour treatment 20

21 Schematic diagramm 22

22 Further Information For further information please visit our website: Issued: February

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Water Recycling in action in South Australia: a review of agricultural and municipal reuse schemes and innovation. S. Rinck-Pfeiffer * Veolia Water/United Water, Parkside, GPO Box 1875, Adelaide, South