phytorid wastewater treatment technology- decentralised & ecosystem based approach
TRANSCRIPT
Phytorid Technology
Decentralised & Ecosystem Based approach
By-Nitin KumarBatch C22013UCE1333
To-Dr. A.B. GuptaProf. MNIT Jaipur
Schematic representation of centralised, combined and decentralised
wastewater management system
Paradigm Shift in Technological Solution
Command & Control approach Ecosystem Based approach
Challenges in conventional treatment
Conventional TreatmentRemove: TSS
Treats: Bio-oxidationNO 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
PHYTORID TECHNOLOGYRe-engineered advanced wetland technology
Subsurface mixed flow constructed wetland system (SSFCW)
Combines physical, biological and chemical processes
Developed by NEERI (National Environmental Engineering Research Institute)
Internationally patented technology
Included in National Environmental Policy
Proposed for smart cities
Components of PHYTORID system
ProcessesSedimentation Bacterial action Filtration Adsorption Decomposition Nutrient uptake Vegetation system
Phytorid bed
Treated water storage
Sewage collection tank
Settler/screen
Various Plant Types Used
•The system is based on the specific plants such as Elephant grass (Pennisetum purpurem), Cattails (Typha spp.), Reeds (Phragmites spp.), Cannas pp., Yellow flag iris (Iris pseudocorus) normally found in natural wetlands with filtration and treatment capability.
•Ornamental as well as flowering plants species such a Golden Dhuranda, Bamboo, Nerium, Colosia, etc. can also be used for treatment as well as landscaping purposes.
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
Performance of PHYTORID for urban waste Pollutant
Parameter Performance (% removal)1. Total suspended solids 85 – 952. Biochemical oxygen demand 80 – 903. Chemical oxygen demand 80 – 954. Total nitrogen 60 – 805. Phosphate 60 – 806. Fecal coliform >99
Treated water quality meets the specifiednorms of CPCB for water reuse
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 5.5-9.0Biochemical Oxygen Demand (mg/L)
40 to 130 <5 30 100
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
Performance of PHYTORID for Sewage typical results
Cost ComparisonPARTICULARS NAME OF TECHNOLOGY
ASP MBBR SBR UASB+EA MBR WSP PHYTORID
AREA REQ . SQMT/MLD 1000 550 550 1100 450 6100 580-1000CAPITAL COST 108 108 115 108 300 63 110CIVIL COST (% OF CAPITAL COST) 60 40 30 65 20 90 80Biomedia/Plantation - - - - - - 19E&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 0.1CHEMICAL COST LACS/MLD 5.3 5.3 3.3 6.3 7.2 0MANPOWER 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
ASP: -ACTIVATED SLUDGE PROCESSMBBR:-MOVING BED BIOLOGICAL REACTORSBR:- SEQUINTIAL BATCH REACTORWSP:- WAST STABILIZATION PONDMBR:- MEMBRANE BIO REACTORUASB+EA:-UPFLOW ANAEROBIC SLUDGE BLANKET+EXTENDED AREATION
ADVANTAGES• Cost-effective• O&M expenses are negligible• Self sustainable unit• Facilitates recycle and reuse of water
• (reuse of grey water upto 95%)• No foul odor and no mosquito nuisance• Aesthetically designed• Easy to maintain & skilled manpower not required• Also suitable for rural areas• Tolerates fluctuations in operating conditions such as flow,
temperature and pH
Phytorid system is useful for treatment of waste water in following:
▪ 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▪ Pre treated industrial wastewater, Sugar Industries▪ Lake restoration
Applications
PHYTORID system in dwellings
Clear Water !!!
Phytorid system: 1.2MLD
Lake Treatment
Peripheral Phytorid
FloatingPhytorid
Contaminated
Treated
Phytorid for nallah water treatment
PHYTORID for nallah water treatment
References:
• Rajesh B. Biniwale, ‘Decentralised wastewater treatment including reuse and recycle – role of constructed wetlands’ NEERI- Mumbai
• Sanjay Murlidhar Karodpati, Alka Sunil Kote, ‘Energy-efficient and cost-effective sewage treatment using Phytorid Technology’ ISSN: 2231 –5721, Volume-2, Issue-1, 2013
• Decentralised Wastewater Treatment and Reuse : Centre for Science and Environment, March 2014
• Technological Options for Solid and Liquid Waste Management in Rural Areas: Ministry of Drinking Water and Sanitation Swachh Bharat Mission (Gramin) Govt. of India, April 2015