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Phytorid for bio-remediation of lakes


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Presentation made by Hydrocreatives at the 15 lake meeting on the WIPRO campus

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Phytorid for bio-remediation of lakes

  1. 1. PHYTORID system for treatment of domestic wastewater (Sewage) Petrichor Emerging Technologies India Pvt Ltd CSIR-National Environmental Engineering Research Institute Nagpur,India himanshu@ Ph# +91-9818003337 Ph# +91-9999787562 November 25, 2014 At Center of India: Nagpur
  2. 2. Methods, Issues, solutions Conventional STP Energy/ Consumables Advanced (Membrane etc.) Domestic Sewage Soakpits Septic Tanks Energy/ Consumables Disposal to water bodies Possible GWR/ reuse RT/ Area Wastewater Stabilization Ponds Constructed wetlands (Phytorid) Septic Tanks reuse/disposal to water bodies Reuse/ Recycle Size specific High Energy Minimum Energy
  3. 3. Energy Minimization though Decentralized treatment • Improve reachability, reduce the need for sewage transportation system • Allowing use of the treated water in-situ • Minimizing pumping, transportation, thus energy efficient • Treatment where it is needed
  4. 4. Challenges in conventional treatment Conventional Treatment Remove: TSS Treats: Bio-oxidation NO N, P removal mechanism Eutrophication due to N, P • High maintenance in terms of cost and energy • Can not down-scale • Failure due to aerators • Sludge disposal • Skilled manpower Sewage
  5. 5. Phytorid: Paradigm Shift in Technological Solution Command and Control Ecosystem Based Trade-off between space and energy
  6. 6. NEERI’s PHYTORID A Constructed Wetland System • Based on 5 years of intense R&D in lab, pilot • Now more than 9 years of field experience of plants • Innovation based on: – Our climate – Our needs – Our cost issues – O&M practices • International Patents: – Australian Patent – European Patent – Indian Patent
  7. 7. Components of PHYTORID system Processes Sedimentation Bacterial action Filtration Adsorption Decomposition Nutrient uptake Vegetation system Phytorid bed Treated water storage Sewage collection tank Settler/screen
  8. 8. Phytorid Details Mechanism 1)Biochemical Oxidation of organics 2)Nitrification/denitrifi cation 3)Phosphate uptake 4)Anaerobic treatment zones at bottom • BOD reduction : O2 diffusion in liquid is limiting factor in any STP, No matter how it is supplied • Improved surface area helps Mass Transfer
  9. 9. Integrated approach for the treatment Phytorid system Streams from small Sewage villages/towns Treated Water River Sewage Treated Water Basin Approach •Reducing pollution load from sewage •Decentralised treatment system at villages and town levels •Nallah-in-situ treatment
  10. 10. Nallah In-situ Treatment Central treatment system Bank of nallah
  11. 11. Possible Environmental Intervention using NEERI’s Phytorid Technology Phytorid technology •Engineered constructed Wetland •No alteration of existing sewage line equired •Can be built in river bed near to sewage outlets or in near by gardens •Will not obstruct water flow during monsoon nor any Location: Ramdaspeth Earlier Proposed Phytorid plan to NMC by NEERI mosquito/odour nuisance
  12. 12. River Projects under consideration • Godavari, Nasik • Panchganga, Kolhapur • Nag River, Nagpur, • Narmada Basin, MP • Kaveri-Kambini, Mysore
  13. 13. Under Consideration T. Nasripura, Mysure
  14. 14. Phytorid Treating Nag River Water: Pilot Project Raw sewage in nallah Treated water Phytorid System Plant at Agricultural college, PKV Nagpur Plant Capacity 100 m3/day
  15. 15. Performance of PHYTORID for Sewage typical results Parameter Inlet sewage quality Treated water quality Standards for inland surface water Standards Land Irrigation pH 7.1 to 7.5 7.2 5.5-9.0 5.5-9.0 Biochemical Oxygen 40 to 130 <5 30 100 Demand (mg/L) Chemical Oxygen Demand (mg/L) 130 to 350 < 12-18 250 Not Specified Total Suspended solids (mg/L) 80 to 90 < 15 100 200 Fecal Coli Farm (MNP/100ml) 106 to 107 <20 --- --- Nitrogen (mg/L) 10 to 50 4-5 5 Not Specified Phosphate (mg/L) 10 to 50 1-4 5 Not Specified
  16. 16. Drain Cleaning • Drain trash cleaning is important • Possibility to use existing hardwares
  17. 17. Lake Treatment Peripheral Phytorid FloatingPhytorid Contaminated Treated
  18. 18. Lonar Lake, Maharashtra Lake Area: 3 hectare Capacity: 500 KLD
  19. 19. Telibandha Lake, Raipur Lake Area: 11 Hectare Phytorid Capacity 2 MLD Proposed to develop 3 plant at periphery
  20. 20. Kot Lake Brahmapuri, Maharashtra Phytorid Capacity 450KLD Project Approved
  21. 21. Shahadara Lake Project (Under tendering Process)
  22. 22. Design Approach • Operating windows for sewage, parameters • Source based selection of unit operations • Space availability and levels • Proximity of end use of treated water • Quality of water required • Soil strata • Design of plant, conceptual, structural and asthetics
  23. 23. Typical Performance Characteristics for Various Treatment Methods Sr. Items Conventional activated sludge UASB Extended Aeration Facultative Aerated Lagoons PhytoRid Technology 1 Performance BOD Removal % 85-92 75-78 95-98 75-85 80-95 2. Sludge First digest then dry on beds or use mech devices Directly dry on beds or use mech devices No digestion dry on sand beds or use mech devices Mech. Desludging once in 5- 10 years Negligible 3. Equipment Requirement (excluding screening and grit removal common to all processes) Aerators, recycle pumps, scrappers, thickeners, digesters, dryers gas equipment Nil except gas collection and flaring gas conversion to elect is optional Aerations, recycle pumps sludge, scrappers for large settlers Aerators only None, all flows by gravity 4. Operational Characteristics Skilled operation reqd. Simpler than ASP Simpler than ASP Simple Unskilled operator 5. Special features Considerable equipment and skilled operation reqd specially when gas collection and usage considered Minimal to negligible power reqd. makes it economical at even if gas revenue is neglected BOD removal highest effluent nitrified high power reqd. Favoured for small and medium plants Power reqd. similar to ASP operation simpler Plant species and odour less operations
  24. 24. Various Plant Types Forage Kochia Kochia spp Poplar Trees Populus spp Willow Trees Salix spp Alfalfa Medicago sativa Cattail Typha latifolia Coontail Ceratophyllum demersvm L Bullrush Scirpus spp Reed Phragmites spp. American pondweed Potamogeton nodosus Common Arrowhead Sagittaria latifolia
  25. 25. ADVANTAGES • Cost-effective • Operation and maintenance expenses are negligible. • Minimum electricity requirement, nearly fossil energy free • Smaller footprint (Retention time: Typically less than 24 hrs.) • Facilitates recycle and reuse of water • No foul odor and No Mosquito Nuisance. • Tolerates fluctuations in operating conditions such as flow, temperature and pH
  26. 26. PHYTORID system is useful for treatment of waste water in following applications ▪ Domestic wastewater (including decentralized Municipal waste water treatment) ➢Colonies, Airports, Commercial complexes, Hotels ➢Open drainage ➢Cleaning of nallah water ▪ Agricultural wastewater ▪ Dairy waste ▪ Slaughter House Waste ▪ Fish pond discharges ▪ Pre treated industrial wastewater, Sugar Industries ▪ Municipal Landfill leachates ▪ Several other applications
  27. 27. Clear Water !!!
  28. 28. Phytorid 1.2MLD
  29. 29. Operation and Maintenance Periods in Months 1 2 3 4 5 6 7 8 9 10 11 12 Maintenance Item Replantation (partial if О О needed) Water Quality analysis О О О О О О О Cleaning of Screening Chamber [ this could be every week, in case load of floating matter is high] О О О О О О О О О О О О Harvesting of overgrown plants and roots О О О О Hydraulics/ water level Checks О О Cleaning of Settling chamber О Pump maintenance (if pump is installed) О О О О
  30. 30. Technology in Field • More than 35 plants already working (Maharashtra, Goa, UP, Uttarakhand, Delhi…) • Government Interest (MoUs, Dialogues) – Municipal Corporation Delhi, – Trans Yamuna Development Board & CM Delhi – Govt of Maharashtra (through ULBs, MJP) – State Planning Commission UP – CG, Water Supply and Sanitation – Greater Hyderabad Municipal Corporation (for Parks & Gardens) – Karnataka Urban Infrastructural Financial Development Council • Under construction about 50 plants • In active consideration more than 100
  31. 31. Comparison PARTICULARS NAME OF TECHNOLOGY ASP MBBR SBR UASB+EA MBR WSP PHYTORI D AREA REQ . SQMT/MLD 1000 550 550 1100 450 6100 580-1000 CAPITAL COST 108 108 115 108 300 63 110 CIVIL COST (% OF CAPITAL COST) 60 40 30 65 20 90 80 Biomedia/Plantation - - - - - - 19 E&M WORK (%OF TOTAL CAPITAL COST) 40 60 70 35 80 10 1 OPERATION& MAINTANEOUS COST YEARLY POWER COST (LACS/MLD) 4.07 4.9 3.37 2.75 6.65 0.5 0.5 ANNUAL REPAIR COST (LACS/MLD) 2.38 1.94 1.84 2.48 1.76 0.1 CHEMICAL COST LACS/MLD 5.3 5.3 3.3 6.3 7.2 0 MANPOWER COST LACS/P.A. 12 12 12 12 12 12 2.5 TOTAL O& M COST PER YEAR 23.75 24.14 20.51 23.53 18.65 21.45 3.1 Refe:- Report Code: - 003_GBP_IIT_EQP_S&R_02Ver1_Dec 2010 ASP: -ACTIVATED SLUDGE PROCESS MBBR:-MOVING BED BIOLOGICAL REACTOR SBR:- SEQUINTIAL BATCH REACTOR WSP:- WAST STABILIZATION POND MBR:- MEMBRANE BIO REACTOR UASB+EA:-UPFLOW ANAEROBIC SLUDGE BLANKET+EXTENDED AREATION
  32. 32. Comparison of Conventional Reed Bed and Phytorid Conventional Reed Bed Phytorid Technology Either vertical or horizontal flow Better hydraulics with mixed flow, advantage for better oxygen mixing Only reed species are used for uptake of nutrients and treatment Combinations of several plant species makes it tailor made wastewater treatment. Also the plant species are local ones Root mass is detached after full growth and spoils the water quality after deterioration No such root mass detachment and hence no fouling May require larger area as shallow beds Can be designed for smaller area
  33. 33. Implementation Mechanism • Technological intervention from CSIR-NEERI – Conceptual Design (vetting of design) – Overall supervision – Commissioning and water quality analysis • Authorized Licensee – Actual implementation in the field – Maintenance • Local Government – Resolution to adopt Phytorid – Space availability – Fund application
  34. 34. Conclusions • Constructed wetland is the needed innovative technology: Ecologically benign • Nearly free of fossil based energy therefore sustainable and doable • Cost effective in terms of O&M is most important factor
  35. 35. Thank You