soil biotechnology
DESCRIPTION
The presentation talks about the technology used at SBTTRANSCRIPT
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Prof H.S.Shankar - [email protected]
Department of Chemical Engineering IIT-Bombay
Tel No 91-22-25767239,25768239
SOIL BIOTECHNOLOGY OF IIT, BOMBAY
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CONTENTS
• PRINCIPLES
• WATER PURIFICATION
• PROCESSING OF SOLID RESIDUES
• AGRICULTURE
• SUMMING UP
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A natural water bodyA natural water body
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A river system once a life line now in distress due to nutrient overload from agriculture
A river system once a life line now in distress due to nutrient overload from agriculture
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A natural water body in the process of decay A natural water body in the process of decay
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A natural water body converted to land due to nutrient overload
A natural water body converted to land due to nutrient overload
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Global Carbon Cycle (Meilli, 1995)Source: Encyclopedia of Environmental Biology, Vol.1, Academy press, 1995, pp.235-248
Global Carbon Cycle (Meilli, 1995)Source: Encyclopedia of Environmental Biology, Vol.1, Academy press, 1995, pp.235-248
Fossil Fuels 4,000
Plants500
CO2 Dissolved 4,000
Live 1-5
Dead Organics Reserve in Soil
1,576Quantities in 1015g
Photosynthesis
Dead Organics in Soil
6110
50
90
50 - 6550 18
CO2 in the Atmosphere
750
Respiration
Animals100-150
(50 y) (2 y)
(300 y)
(1 y)
(0.2 y)
(1- 10 y)
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1. Water 500 kJ/g live C. yr
2. Land 3 kJ/g live C. yr
ENERGY CONSUMPTION IN DIFFERENT HABITATS
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Discharge (vf )
Reactor
Feed (vf )
C2
Recycle (vr )
C1
1.Raw water
2.Raw Water slurry
3. Air scrubbing
4. Leachates of solids
5. Waste water
SCHEMATIC OF WATER RENOVATION
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T1 R1 T2 R2 T3 T4R3
T1
R1
T2
R2
T3 T4
R3
SCHEMATIC OF MULTISTAGE PURIFICATION
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LARGE SCALE FACILITY FOR SEWAGE RENOVATION
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Respiration(CH2ONxPySzKyQ)n + nO2 + nH2O + Micro-organisms =
nCO2 + 2nH2O + Mineral (N, P, S, K,Q) + Energy
PhotosynthesisnCO2 + 2nH2O + Minerals (N,P, S,K,Q) + Sunlight =
[CH2ONxPySzKyQ]n + nO2 + nH2O
Chemical Mineral weatheringCO2 + H2O = HCO3
- + H+
Primary mineral + CO2 + H2O = M+n + n HCO3 - + soil/sand/clay
MAJOR CHEMICAL REACTIONS AT WORK
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Crop Mineral
% DM N
% DM Water
ton / ton DMYield
ton DM / haSubabul 0.5 – 0.8 Small 50 20
Sugarcane 1.5 – 2.0 Small 400 18 Corn 5.0 – 6.0 0.3 – 0.5 200 14
Wheat 9 – 11 0.3 – 0.5 600 12 paddy 18 - 20 0.3 – 0.5 1000 9
* * DM – Dry Matter Yield is total biomass-grain, straw etc.
BIOMASS YIELD, MINERAL CONTENT, NITROGEN CONTENT, WATER CONSUMPTION FOR SOME CROPS
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CHEMISTRY OF SBTRespiration(CH2ONxPySzKy)n + nO2 + nH2O = nCO2 + 2nH2O + Mineral (N, P, S, K) + Energy (1)
PhotosynthesisnCO2 + 2nH2O + Minerals (N,P, S,K) + Sunlight =
[CH2ONxPySzKy]n + nO2 + nH2O (Photosynthesis) (2)Nitrogen FixationN2 + 2H2O + Energy = NH3 + O2 ( in soil) (3)N2 + 2H2O + Light = NH3 + O2 (in water) (4)
Acidogenesis4C3H7O2NS + 8H20 = 4CH3COOH + 4CO2 + 4NH3 + 4H2S + 8H+ + 8e- (5)
Methanogenesis8H+ + 8e- + 3CH3COOH + CO2 = 4CH4 + 3CO2 + 2H2O (6)
Adding 5 and 6 give overall biomethanation chemistry4C3H7O2NS + 6H20 = CH3COOH + 6CO2 + 4CH4 + 4NH3 + 4H2S (7)
Mineral weatheringCO2 + H2O = HCO3
- + H+ (8)Primary mineral + CO2 + H2O = M+n + n HCO3
- + soil/clay/sand (9)
NitrificationNH3 + CO2 + 1.5O2 = Nitrosomonas + NO2
- + H2O + H+ (10) NO2
-+ CO2 + 0.5O2 = Nitrobacter + NO3- (11)
Denitrification4NO3
- + 2H2O + energy = 2N2 + 5O2 + 4OH - (12a)NO2
- + NH4+ = N2 + H2O + energy (12b)
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The trinity – showing importance of combining organics, inorganics & suitable life forms to derive
value from wastes
The trinity – showing importance of combining organics, inorganics & suitable life forms to derive
value from wastes
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Energy Input M k cal / ha
Crop
Fossil Labour Total
Yield kg / ha
OutputM cal / ha
Efficiency(-)
Wheat(USA) 3.77 0.002 3.772 2284 7.5 2.2
Wheat(India) 0.256 0.1845 0.4405 821 2.7 6.25
Rice(USA) 15.536 0.009 15.545 5796 21.0 1.35
Rice(Phil) 0.582 0.1728 0.754 1655 6.0 7.69
Potato(USA) 8.90 0.018 8.92 26208 20.2 2.27
Cassava(Tanga) 0.016 0.385 0.401 5824 (Dry) 19.2 50.0
Source: Energy in agriculture, Lockeritz (ed.) International Congress energy in agriculture Missouri, 1975-76
ENERGY CONSUMPTION FOR FOOD CROPS
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0
1
2
3
4
5
6
7
8
9
10
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Yield , Ton/ha
0
10
20
30
40
50
60E
nerg
y ef
ficie
ncy Wheat,USA
Rice,USAPotato,USAWheat,IndiaRice,PhillipinesCassava,Tanga
Direction of
Increasing biological potential
Yield -Efficiency correlation for some cropsYield -Efficiency correlation for some crops
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Organics and rock particles
Bioprocessing by the two types of organismsSource: Bhawalkar (1996)
Bioprocessing by the two types of organismsSource: Bhawalkar (1996)
Organics
Residual organics
Gut residence time: about 5 h
Anaerobic processing
Aerobic processing
Gut residence time: about 1 h
Pump is organism as mobile bioreactor
Refeeding
Single-pass Bioreactor
Loop Bioreactor
(Say Red worm) (Say Earthworm)
Biosoil incubation
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ECO-ENERGETICS OF AN EARTHWORM (Lavell, 1974)
Fresh Weight mg/individual 1025
Ingestion (J/g.d) 1570
Assimilation (J/g.d) 140
Production (J/g.d) 10
Respiration (J/g.d) 130
Egestion (J/g.d) 1430
EXPONENTIAL GROWTH OF BACTERIA IN EARTHWORM GUT
(no. in million) (Parle, 1959)
Forgut Midgut Hindgut
All Bacteria 475 32900 440900Actinomycetes 26 358 15000
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1
3
5
7
9
20 40 60 80 100
Rats, ants
Termite Cockroach
Earthworm
11
Fly Larvae
Potworm
Redworm
Fly
Mosquito
Optimum
Optimum
Moisture (%)
pH
Niches of Earthworms and Pests (Bhawalkar, 1996)
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A picture of red worms – r selected organisms in waste environment
A picture of red worms – r selected organisms in waste environment
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EXPERIMENT SET -UP
E(theta) vs theta
0
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
0 1 2 3
theta
E(th
eta)
Concentration vs Time Plot
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TWO CHANNEL MODEL
α = fraction of holdup in the macrochannel
β = fraction of tracer that enters the macrochannel
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TWO CHANNEL MODEL
( ) ( )( )
⎟⎟⎟⎟⎟
⎠
⎞
⎜⎜⎜⎜⎜
⎝
⎛⎟⎟⎠
⎞⎜⎜⎝
⎛−−
−−
−−
+
⎟⎟⎟⎟⎟
⎠
⎞
⎜⎜⎜⎜⎜
⎝
⎛⎟⎠⎞
⎜⎝⎛ −
−=
2
2
2
2
2
2
2
1
1
21
1
1
2
4)1(
)1(1exp
2
11
14
1exp
2
1
PePePePe
E θαθβ
πθαβ
θαβθ
πθαβθ
( )( )τβ
ατ−−
=11
2
PePeαβ
=1
( )( ) PePe
αβ
−−
=11
2
11
tθτ
= 22
tθτ
=τβατ =1
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i
io
zFRTD
λ2=
33gW
Qρμδ =
DuLPe =
= 1.9 * 10-5 cm/s2
= 0.1 mm
= 6 - 14
Diffusivity
Film Thickness
Peclet Number
THEORETICALLY CALCULATED PARAMETERS
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RTD Plot of normalized concentration (C/Co) vs. Time for 2m soil filter showing fit to Dispersion model equation (8) for Run 2a (22.3 cm/h)
with fitted parameters α=0.67, β=0.9, Pe=9
RTD Plot of normalized concentration (C/Co) vs. Time for 2m soil filter showing fit to Dispersion model equation (8) for Run 2a (22.3 cm/h)
with fitted parameters α=0.67, β=0.9, Pe=9
0 0.5 1 1.5 2 2.5 30
0.2
0.4
0.6
0.8
1
1.2
1.4
theta
C(t
heta
)
C (theta) versus theta
ExpModel
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EXPERIMENT AND THEORETICAL PARAMETERS
Run No
Q(ml/min)
τ(min)
δ(mm)
H(lit)
A(m2)
u(m/s)
Pe
I 95 155 0.06 14.72 245 6.46 ×10-9 6.1
II 100 153 0.06 15.3 255 6.53 ×10-9 6.2
V 125 133 0.07 16.62 237 8.79 ×10-9 8.4
III 155 102 0.07 15.81 226 11.4 ×10-9 10
VI 182 91 0.08 16.56 207 14.6 ×10-9 13.9
IV 200 90 0.08 18 225 14.8 ×10-9 14.1
Run No Q(ml/min)
τ(min)
α Pe
I 95 155 0.73 12.1
II 100 153 0.69 18.3
V 125 133 0.63 9.7
III 155 102 0.75 10.1
VI 182 91 0.68 12.3
IV 200 90 0.68 11.5
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RTD Plot of normalized concentration (C/Co) vs. Time for soil filter showing fit to Dispersion model equation (8) for Run 2a (22.3 cm/h)
with fitted parameters α=0.25, β=0.68, Pe=0.83
RTD Plot of normalized concentration (C/Co) vs. Time for soil filter showing fit to Dispersion model equation (8) for Run 2a (22.3 cm/h)
with fitted parameters α=0.25, β=0.68, Pe=0.83
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Plot of normalized concentration (C/Co) and RTD function E (t) vs. Time for soil filter showing fit to Dispersion model equation (8) for Run 1a (7.2 cm/h) with fitted parameters α=0.09, β=0.40, Pe=0.89
Plot of normalized concentration (C/Co) and RTD function E (t) vs. Time for soil filter showing fit to Dispersion model equation (8) for Run 1a (7.2 cm/h) with fitted parameters α=0.09, β=0.40, Pe=0.89
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-500
0
500
1000
050 100 150 200
Time,h
OR
P, m
ilivo
lt
ORP data (Probe 9, Depth:-2.5cm)
Fit to model Eqn 3.6.13 & 3.6.14
Equipment : Pheretima BiofilterIntial loading on bed =24.4gmCOD/LRestoration rate constant I stage =0.2 /h Restoration rate constant II stage =0.11/h
ORP (Reference calomel electrode+244 mV) restoration profile showing fit to model Pattanaik, B.R. (2000)
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120
Dis
solv
ed O
2, m
g/L
.
Variation of outlet O2 concentration with time as per single cell model Pattanaik.,(2000)
Variation of outlet O2 concentration with time as per single cell model Pattanaik.,(2000)Pattanaik.,(2000)
0 20 40 60 80 100Time, min
0
1
2
3
4
5
6
7
Experimental data
Fit to model
Pheretima biofilterT = 30.2 Cvs = 7.2 cm/hCI = 1.8mg/LCe = 6.8 mg/L Run : OTR 14
PHYSICAL MASS TRANSFER
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PHYSICAL MASS TRANSFER
0
2
4
6
8
0 20 40 60 80
Time (Mins)
DO (m
g/L)
120 ml/min250 ml/min
Variation of outlet O2 concentration with time, Sathyamoorthy(2006)(2006)
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0
100
200
300
400
500
600
0 2 4 6 8 10
Time (hr)
CO
D (m
g/l)
150 ml/min
COD concentration with Time Kadam.(2005).(2005)
COD REMOVAL
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COMPARISON OF AIR TO WATER OXYGEN TRANSFER COEFFICIENTS
Agitated & sparged vessels 10-3 to 10-2 /sec
This work 5 x 10-3/sec
Quiescent fluids 10-5/sec
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1. Continuity Equation
2. Momentum balance
From Darcy’s Law
Rate equations for substrates 3. Species Transport Equation
4. conc. balance in holding tank
vFαμ
−=
( ) ( ) 0RCD.Cvt
Ciim,ii
i =−∇∇+⋅∇+∂∂
)t(S)t(Sdt
dS21
2h −=τ
0)v(t
=ρ⋅∇+∂ρ∂
( ) Fgp)vv(tv
+ρ+−∇=ρ⋅∇+∂ρ∂
Substrate Description Rate Equation
COD Mass Transfer Kac(C1-C1*)COD Oxidation KcCs
NH4+-N Mass Transfer Kan(C2-C2*)
NH4+-N Nitrification KNN s
GOVERNING EQUATIONS
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Effect of hydraulic loading on distribution of liquid on biofilterEffect of hydraulic loading on distribution of liquid on biofilter
0
0.2
0.4
0.6
0.8
1
1.2
0 1 2 3 4 5 6 7 8
Time,hr
C2/C
20
C2/C20 fit to Eq.3.4.7, Run 2bExptl data, C2/C20, Run 2bC2/C20 fit to Eq. 3.4.7, Run 3bExptl. Data, C2/C20, Run 3b
Run Hyd. Loading rate ka(m3/m2.hr ) (hr-1)
2b 0.6 0.223b 0.8 0.53
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CFD MODEL VALIDATION: COMPARISON WITH EXPERIMENTAL DATA
0 1 2 3 4 5 620
40
60
80
100
120
140
160
180
200
Time (h)
CO
D (
mg/
L )
0 1 2 3 4 5 60
1
2
3
4
5
6
Time (h)N
H4+−
N c
onc.
(m
g/L
)
0 1 2 3 4 5 60
1
2
3
4
5
6
Time (h)N
H4+−
N c
onc.
(m
g/L
)
Vb =13 L, Vl = 30 L, vr = 5x 10-5 m3/m2hkac = 2.7 h-1, kC = 0.05 h-1, kan = 11 h-1, kN =1.5 h-1,
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Model Parameters: Vb =13 L, Vl = 30 L, vr = 5.1 m3/m2 h α = 0.32, β = 0.81, εd = 0.25,
Pe = 0.18, kac = 1.5 h-1, kan = 11 h-1,
0
10
20
30
40
50
60
70
80
90
0 2 4 6 8Time (h)
CO
D (
g /
L )
Model Eq. 9 & 10
Experimental
0
10
20
30
40
50
60
70
80
90
0 2 4 6 8Time (h)
CO
D (
g /
L )
Model Eq. 9 & 10
Experimental
0
1
2
3
4
5
6
7
8
0 1 2 3 4 5 6 7Time ( h)
NH
4+ -
N (
mg/
L)
Model Eq. 9 & 10
Experimental
0
1
2
3
4
5
6
7
8
0 1 2 3 4 5 6 7Time ( h)
NH
4+ -
N (
mg/
L)
Model Eq. 9 & 10
Experimental
Comparison between Dispersion model prediction and reactor performance data for sewage
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Before SBT Processing
COD: 12,160mg/L
After SBT Processing
COD: 64 mg/L
DISTILLERY SPENT WASH
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COLI FORM REMOVAL
Coliform removal
1.0E+01
1.0E+02
1.0E+03
1.0E+04
1.0E+05
1.0E+06
1.0E+07
1.0E+08
1.0E+09
Inf luent E0 E1 E2 E3 E4 E5 E6 E7
Re c y c l i ng ( hr )
Col
iform
(CFU
/100
ml)
Total coliformfecal coliform
Effect of recycling on micro-organism removal; E0: Effluent 0 hr, E1: Effluent 1 hr etc Kadam., (2005)., (2005)
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ARSENIC REMOVAL BY SOIL FILTER
• As(III) oxidation and removal As(V) via precipitation as ion complex with Fe(III).
• These results show that <10 ppb As are attained via natural oxidation and chemical precipitation revealing typically 0.3 mg As (III)/lit.hr.
• These natural rates of removal sustain via the natural aeration of the
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PrecipitationFe3+ + As Filter
As Sludge30 % %Complex
Soil Filter
As (III) water As (V) Fe3++ As
PROCESS DIAGRAM FOR ARSENIC REMOVAL FROM
WATER
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Initial As(III)=500 μg/l; Filter bed volume=17 lit; Flow rate = 60ml/min, Total volume of water passed per day = 30 lit, which constitute one run.
Expt. Run No Initial Arsenic Conc. μg/l
Residual Arsenic μg/l
1 500 8
2 500 8
3 500 8
4 500 8
5 500 8
6 500 8
7 500 3
8 500 6
9 500 5
10 500 4
11 500 4
12 500 4
13 500 4
ARSENIC REMOVAL IN SOIL FILTER SYSTEM
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COMPARISON OF ARSENIC REMOVAL RATES
• Zero Valent iron 0.85 mg As/lit.hr( Leupinet al., 2005)
• Iron coated sand 0.75 mg As/lit.hr (Joshi and Chaudhari, 2004)
• Activated Alumina 0.15 mg As/lit.hr (Pant and Singh, 2005)Soil filter process 0.30 mg As/lit.hr
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LAY OUT OF SBT MEDIA
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Effect of Feed Distribution arrangementon Fluid distribution
Contours of Velocity Magnitude (m/s)
Fig 4a: Feed From Top surface onlyFig 4b: Feed From Top & Slopes vr = 0.15 m3/m2h
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SBT PLANTTOP VIEW
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PLANT ELEVATION
500 m3/day BPGC Plant for wastewater treatment
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3MLD Sewage purification in Corporation Of Bombay
SBT PLANT
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PARAMETERS INFLUENT EFFLUENTTemp. (0C) 31.4 31.3pH 6.91 8.26Conductivity (micro S/cm) 2160 987DO (mg/l) 0.85 7.01Turbidity (NTU) 145 5.32COD (mg/L) 352 64BOD 211 7.04Ammonia (mg/L) 33.4 0.010Phosphate-P (mg/L) 0.474 0.0016SS(mg/l) 293.3 16Alkalinity(mg/L) 212 148Fecal coliform(cfu/100ml) 145*105 55Total coliform(cfu/100ml) 150*108 110
WATER QUALITY ANALYSIS OF SBT PLANT
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PROCESS FEATURES
• Very low energy use intensity due to high Natural oxygen transfer in process. (0.06 kWh/kL sewage).
• Very low space intensity of 0.8-1.0 sqm/kLper day sewage.
• An engineered evergreen natural process with no moving parts except for pumps.
• No sludge due to ecology at work.• Very high bacteria, BOD, COD, suspended
solids, colour, odour, ammonia removal.• Practically maintenance free.
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SBT PLANT
3MLD Sewage purification in Corporation Of Bombay
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SBT PLANT
3MLD Sewage purification in Corporation Of Bombay
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SBT PLANT
3MLD Sewage purification in Corporation Of Bombay
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Renovation of colony sewage for irrigation in sports complex
Renovation of colony sewage for irrigation in sports complex
SBT PLANT
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REUSABLE WATER FROM WASTEWATER
Wastewater Treated Wastewater
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Colony sewage treatment showing untreated &
treated water
Colony sewage treatment showing untreated &
treated water
SBT PLANT
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Renovation of septic tank waste water for irrigation in a Research Center
Renovation of septic tank waste water for irrigation in a Research Center
SBT PLANT
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Retrofitting of idle activated sludge plantRetrofitting of idle activated sludge plant
SBT PLANT
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Item Features
Organic loading 150-200 g / sqm.d
Hydraulic loading 0.05 - 0.25 cum/sqm.h
Oxygen transfer 150-200 g / sqm.d
Heat generation 600-800 k.cal / sqm.d
Conversion As required
Shear rate 0.01 – 0.1 per sec.
SUMMARY OF SBT PROCESS FEATURES FOR SEWAGE TREATMENT
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OPERATING FACILITIES
• Bombay Presidency Golf Club• Naval Housing Colony, Bombay• Vazir Sultan Tobacco, Hyderabad• Jindal Steel, Delhi• Taj Kiran, Gwalior• IIT Bombay• Beru Ashram Badlapur• Delhi Travel Tourism Dev Corporation• Bombay Municipal Corporation (in progress)• University of Hyderabad (in progress).
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Close up of solid waste processingClose up of solid waste processing
SBT PLANT
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Schematic of organic residue processing. Schematic of organic residue processing.
ROAD2
Loading Rows4
6
3839
ROAD
100 m
10 m
300 mRO
AD
RO
AD
10 m 5 m
5 mRaw organics
Underdrain
1 m
A
Semi-processed organics
ORGANIC RESIDUEPROCESSING
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Restoration of municipal dumping groundsRestoration of municipal dumping grounds
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Processing chicken offalsProcessing chicken offals
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Item Features
Organic loading 150-200 g / sq.m.d
Product Yield 0.375 – 0.500 kg / kg
Oxygen transfer 150-200 g / sq.m.d
Heat generation 600-800 k.cal / sq.m.d
Conversion 20-30%
Products fertilizer/culture/soil
SUMMARY OF PROCESS FEATURES FOR
ORGANIC SOLID CONVERSION
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Chickoo plant affected by fungal diseaseChickoo plant affected by fungal disease
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Chickoo plant after restoration of soilChickoo plant after restoration of soil
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ECONOMICS FOR SEWAGE TREATMENT
Capacity (m3 / d) Item Unit 5 50 100 200 500 3,000 10,000
1. Space m2 40 250 400 600 1500 3500 10000 2.Civil, mech., Elec. Rs. Mil 0.10 0.5 0.9 1.0 1.5 12 25 3.Bioreactor Rs. Mil 015 0.6 1.0 1.5 2.5 17 50 Total (2 + 3) Rs. Mil 0.25 1.1 1.9 2.5 4.0 29 75 4. Power Rs./d 10 100 200 400 800 1200 4000 5. Additives Rs./d 20 100 250 500 1250 5000 15000 6. Staff Rs./d 250 250 500 500 1000 2500 5000 7. Miscellaneous Rs./d 10 50 50 150 200 300 500 Total (5 to 7) Rs./d 340 600 1000 1550 3250 9000 24500 US $ = Rs. 47.00; Power Rs. 4 per kWh ; Mil – Million; additives – Rs. 5 / kg
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ECONOMICS FOR MUNICIPAL ORGANIC SOLIDSItem Unit Features
Capacity Ton/day 1 10 20 100
Space Sq.m 2000 15000 20000 50000
Civil, mech., elec. Rs. mil 0.5 2.5 4.5 15
bioreactor Rs. mil 0.2 1.0 1.5 5.0
Total (3+4) Rs. mil 0.7 3.5 6.0 20
production Ton/year 150 1500 3000 15000
Labour Rs./day 450 3500 5000 10000
Power fuel Rs./day - - 1000 5000
Additives Rs./day 400 4000 8000 20000
Misc. Rs./day 50 200 500 1000
Total (6-8) Rs./day 850 7500 15500 36000
mil. – millionmech. – mechanicalelec. – electrical Rs. – Rupees (1US$ = Rs.47)
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APPLICATIONS
• Rain water harvesting via storm water conservation• Primary purification of drinking water• Primary purification of swimming pool water
• Sewage treatment for reuse in construction, cleaning & gardening, ground water recharge, make up water for swimming pools & industries etc
• Industrial wastewater treatment, • Industrial air purification
• Organic solid waste conversion • Municipal solid waste processing • Commercial production of Soil• Animal House waste processing • Hospital waste disposal
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SUMMING UP
Engineered natural oxygen supply
Evergreen Environment
No moving parts
No biosludge
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THANK YOU !
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0
200
400
600
800
1000
1200
1400
0 20 40 60 80 100
Angle
Inte
nsity
Murram
Partially weathered Rock (Murram)
XRD ANALYSIS
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0
200
400
600
800
1000
0 20 40 60 80 100
Angle
Inte
nsity
Black soil
Artificially weathered Rock (Black soil)
XRD ANALYSIS
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0
200
400
600
800
1000
1200
1400
0 20 40 60 80 100
Angle
Inte
nsity Blacksoil
Murram
Comparison of Artificially weathered Rock (Black soil) with Murram (partially weathered Rock)
XRD ANALYSIS
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0100200300400500600700800900
0 20 40 60 80 100
Angle
Inte
nsity
Rock Powder
Primary mineral (Rock powder)
XRD ANALYSIS
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0
200
400
600
800
1000
1200
0 20 40 60 80 100
Angle
Inte
nsity
Redsoil
Naturally weathered Rock (Red soil)
XRD ANALYSIS
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0
200
400
600
800
1000
1200
1400
0 20 40 60 80 100
Angle
Inte
nsity Rock-Powder
Murram
Comparison of Primary Mineral (Rock powder) with Murram (Partially weathered Rock)
XRD ANALYSIS
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0
200
400
600
800
1000
1200
1400
0 20 40 60 80 100
Angle
Inte
nsity REDSOIL
Murram
Comparison of Naturally weathered Rock (Red soil) with Murram (partially weathered Rock)
XRD ANALYSIS
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XRD ANALYSIS
AW-1
450
550
650
750
850
950
1050
1150
1250
1350
25 30 35 40 45 50 55 60 65
Angle
Inte
nsity
Artificially weathered Rock - 1
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XRD ANALYSIS
AW-2
500
600
700
800
900
1000
1100
1200
1300
25 30 35 40 45 50 55 60 65Angle
Inte
nsity
Artificially Weathered Rock - 1
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XRD ANALYSIS
AW-3
500
600
700
800
900
1000
1100
1200
1300
25 30 35 40 45 50 55 60 65
Angle
Inte
nsity
Artificially Weathered Rock - 2
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XRD ANALYSIS
AW-4
500
600
700
800
900
1000
1100
1200
25 35 45 55 65Angle
Inte
nsity
Artificially Weathered Rock - 2
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XRD ANALYSIS
Worli pad-5
400
600
800
1000
1200
1400
1600
25 30 35 40 45 50 55 60 65
Angle
Inte
nsity
Artificially Weathered Rock
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XRD ANALYSIS
Garden Soil
600
700
800
900
1000
1100
1200
1300
1400
1500
25 30 35 40 45 50 55 60 65Angle
Inte
nsity
Artificially Weathered Rock
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PATENTS AND PUBLICATIONS
1. US Patent No: 6890438 " Process for treatment of organic wastes"H.S.Shankar, B.R.Patnaik, U.S.Bhawalkar, issued 10 May 2005
2. "Process for treatment of Organic residues" India Patent Application MUM/384/26 April 2002, H.S.Shankar, B.R.Patnaik,U.S.Bhawalkar
3. " Process for treatment of waste water" India Patent Application MUM/383/26 April 2002, H.S.Shankar,B.R.Patnaik,U.S.Bhawalkar
4. Patnaik, B.R., Bhawalkar, U.S., Gupta, A., Shankar, H.S., “Residence Time Distribution model for Soil Filters, Water Environment Research, 76(2), 168-174,2004
5. Patnaik, B.R., Bhawalkar, V.S., Shankar, H.S., “Waste Processing in Engineered Ecosystems”, 4th World Congress on Chemical Engineering, 23-27, September 2001, Melbourne, Australia
6. Patnaik, B.R., Bhawalkar, U.S., Kadam, A, Shankar, H.S., “Soil Biotechnology for Waste Water Treatment and utilization”, 13th ASPAC 2003, International Water Works Association Conference 13-18, October, 2003, Quezon City, Philippines
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PATENTS AND PUBLICATIONS
7. Kadam,AM,Ojha,Goldie., Shankar,H.S Soil Biotechnology for Processing of waste waters, 9 th International conference, Indian Water Works Association, Bombay 26-27 Nov2005
8. Yeole,U.R., Patnaik,B.R.,Shankar,H.S.," Soil Biotechnology process simulation using computational fluid dynamics" Session Advanced Computations for Environmental Applications II" AIChE Annual Meeting, 7-12 Nov 2005,Austin Texas, USA
9. Pattanaik., B.R.(2000),” Processing of Wastewater in Soil Filters”, Ph.D. Dissertation, Dept of Chemical Engg., IIT Bombay
10. Yeole,Umesh Prabhakar"Soil Biotechnology Process Simulation using Computational Fluid dynamics" 2004
11. Bhuddhiraju,Sudheendra., "Soil Biotechnology Process simulation using Computational Fluid dynamics" 2005
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MEDIA AND CULTUREUS Patent: Process for treatment of organic wastes; US
Patent no: 6890438, www.uspto.gov; Issue date: 10 May 2005 ;
Underdrain:- Stone rubble of various sizes ranging upto Gravel (200.0-2.0 mm), Very coarse sand (1.0-2.0 mm), Coarse sand (0.5-1.0 mm), Medium sand (0.25-0.5 mm), Fine sand (0.1-0.25 mm)
Media:- Formulated from soil as required and primary minerals of suitable particle size and composition
Culture:- Geophagus (Soil living) worm Pheretima elongata and bacterial culture from natural sources containing bacteria capable of processing cellulose, lignin, starch, protein, also nitrifying and denitrifying organisms. Anaerobic organisms for methanogenesis. For industrial wastes, development of appropriate culture required
Additives:- Formulated from natural materials of suitable particle size andcomposition to provide sites for respiration, CO2 capture
Bioindicators:- Green plants particularly with tap root system
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Current sanitation solutions contribute, either directly or indirectly, to many of the problems faced by society today: water pollution, scarcity of fresh water, food insecurity, destruction and loss of soil fertility, global warming, and poor man health as well as loss of life.
In summary, we divert excreta away from land, consuming a limited resource – fresh water, into receiving water bodies causing water pollution. We then try to treat the water we drink. Both processes create health hazards. By diverting nutrients away from land, artificial fertilizers are added to land, creating even more water pollution, which is difficult and expensive to treat.
We must find another way. We have to design and build new systems, which promote waste as a resource and envisage local solutions and cultural attitudes and contribute to the solving society’s most pressing problems.
Source: Esrey, S. & Anderson, I., Vision 21- Environmental Sanitation Ecosystems Approach, report published by Water Supply and Sanitation Collaborative Council ( WSSCC) World Health Organization, United Nations, 1993
EXTRACT FROM VISION 21 DOCUMENT OF WHOEXTRACT FROM VISION 21 DOCUMENT OF WHO
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As(III) conversion to As(V) in Soil Filter
Precipitation of FeCl3
As(V)µg/l
ResidualAs(III)µg/l
Residual Total As
µg/l0 995.50 150.00 640.00 18.530 986.67 636.67 350.00 15.6560 1020.00 783.33 236.67 13.3490 1003.33 826.67 176.67 11.25120 1000.00 926.67 73.33 7.75150 1026.67 973.33 53.33 5.85180 1016.67 983.33 33.33 7.00210 1013.33 950.00 63.33 7.42240 1016.67 933.33 83.33 7.40
Timeminute
Total Asµg/l
AS (III) TO AS (V) CONVERSION IN SOIL FILTER SYSTEM
As(III) =1000 µg/l As(III); Flow rate= 130 ml/minute; Filter bed volume = 17 lit; Precipitation with Fe(III); (FeCl3 ) dose as Fe added 55 mg/l.