In simplest terms soil sterilization consist in getting
rid of the organisms harmful to plant growth or
atleast, in reducing their numbers to a point where
they are no longer of consequence without permanently eliminating or disturbing the balance of those organisms essenstial for fertility.
Soil sterilization is indispensable to modern practice, not only
because it ensures clean soil but because it provides better
nutrition; indeed, it is the basis of the best nutrition.
Basically it is treatment of soil of glasshouses , greenhouse and other horticultural soils in order to kill weed, seeds, plant disease organisms, and pests.
Sterilisation is distinct from disinfection, sanitization and pasteurization in that sterilization kills, deactivates, or eliminates all forms of life and other biological agents.
Example: Molya disease of wheat caused by Heterodera avenae White tip disease of rice caused by Aphelenchoides besseyi . Soil borne pathogens like Fusarium, Rhizoctonia, Sclerotia can be controlled by this.
In simplest terms soil sterilization consist in getting
rid of the organisms harmful to plant growth or
atleast, in reducing their numbers to a point where
they are no longer of consequence without permanently eliminating or disturbing the balance of those organisms essenstial for fertility.
Soil sterilization is indispensable to modern practice, not only
because it ensures clean soil but because it provides better
nutrition; indeed, it is the basis of the best nutrition.
Basically it is treatment of soil of glasshouses , greenhouse and other horticultural soils in order to kill weed, seeds, plant disease organisms, and pests.
Sterilisation is distinct from disinfection, sanitization and pasteurization in that sterilization kills, deactivates, or eliminates all forms of life and other biological agents.
Example: Molya disease of wheat caused by Heterodera avenae White tip disease of rice caused by Aphelenchoides besseyi . Soil borne pathogens like Fusarium, Rhizoctonia, Sclerotia can be controlled by this.
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botany of mango, mango products. mango production process, mango breeding strategies.in this agricultural crop mango.what you know about mango. short description about mango
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Weed competition is a major limiting factor for the productivity of crops. Weed control is one of the main concerns in organic farming. Weed depletes nutrient, water and light their by reducing crops yields drastically. The chemical intervention is not permitted for weed control purpose in organic farming system. Apprehension regarding the consequence of managing weeds without the use of herbicides is a major factor limiting the adoption of organic farming by conventional growers. As wide spread application of herbicides has led to concern about contamination of environment, residues problems in soil and water, toxicity to animals and appearance to resistant weeds. The elements to consider in controlling weed problems are only the non chemical methods of weed control. These include physical /mechanical, cultural and biological methods of weed control.
botany of mango, mango products. mango production process, mango breeding strategies.in this agricultural crop mango.what you know about mango. short description about mango
Comparison of Open-Pile and In-Vessel Composting Systems by GMTgreenmtn
This presentation can help you determine whether you should compost with an Open-Pile or In-Vessel Composting System. Courtesy of Green Mountain Technologies, Inc.
Aerobic composting process, methods and technology and brief description on the conversion stages from mature compost into granule organic fertilizers. This article was presented before a steering committee in Jakarta in August 2012 on a MSW project.
Here I would like to introduce the house fly term paper presentation in sequel to my old term papers. I hope it will enhance your understanding on the urban pest House fly
Composting is nature's process of recycling decomposed organic materials into a rich soil known as compost. Anything that was once living will decompose
Simple,inexpensive and rugged,parts are easy to dismentle and sterilize, safe to use.
Delivers the right gas mixture
Allows all methods of ventilation in all age groups
Resistence low at flows in practice
Compression and compliance loss is less.
Sturdy, small and light
Allows easy removal of waste gases
Easy to maintain with low running costs
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Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
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Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Embracing GenAI - A Strategic ImperativePeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
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Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Safalta Digital marketing institute in Noida, provide complete applications that encompass a huge range of virtual advertising and marketing additives, which includes search engine optimization, virtual communication advertising, pay-per-click on marketing, content material advertising, internet analytics, and greater. These university courses are designed for students who possess a comprehensive understanding of virtual marketing strategies and attributes.Safalta Digital Marketing Institute in Noida is a first choice for young individuals or students who are looking to start their careers in the field of digital advertising. The institute gives specialized courses designed and certification.
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Lessons learned in Aerated Static Pile Composting
1. M I C H A E L B R Y A N - B R O W N , G R E E N M O U N T A I N
T E C H N O L O G I E S , B A I N B R I D G E I S L A N D , W A
J E F F G A G E , C O M P O S T D E S I G N S E R V I C E S , O L Y M P I A , W A
Lessons Learned in Aerated
Static Pile (ASP) Composting
2. ASP Lessons Learned Overview
ASP History (Beltsville Method) and definition
Pile porosity, moisture and height must be consistent
Within a large compost pile the moisture loss =
energy loss = total decomposition
Air flow direction as a tool to manage moisture
Air duct sizes and blowers must match feedstock
volatility (one size does not fit all)
Turning and rewetting systems must be considered
for energetic feedstock mixtures
3. Definitions
Aerated Static Piles are
forced aeration
composting systems for
carefully constructed and
blended piles of organic
residuals.
They provide adequate
oxygen and control of
pile temperature by
adjusting the amount
and direction of airflow
Control of air flow is done
by using:
Suction and/or pressure
blowers; and
On/off timers; and/or
Temperature feedback
Zone dampers; and/or
Bidirectional dampers
What is an ASP?
4. Desired Role Process Consequence
Contain and treat initial
odorants (VOC’s) during
the first 7 to 10 days
Provide temperature
control to meet
sanitation requirements
Significantly reduce
oxygen demand for any
following processes
Media dries as energy is
released as water vapor
Compost process slows as
moisture is lost
Settling can reduce pile
porosity and limit airflow
Surface precipitation can
create veins of saturation
Odors can develop in
saturated areas
The Role of ASP’s in a Compost Process
6. Aeration direction Consequences
Positive (pressure)
aeration
Negative (suction)
aeration
Less power and leachate,
but dries out pile quickly
Large temperature
gradients within the pile
Requires a biofilter surface
layer or membrane cover
1/3rd more power for the
same air flow rate,
More leachate and
condensate
Less temperature gradients
Requires fixed biofilter
Different Approaches to ASP Systems
7. Alternating positive and
negative aeration 4 Way Rotary Damper
Retains moisture
Controls temperature
gradients with
high/low sensors
Requires both surface
biofilter layer and fixed
biofilter on exhaust
Auto-Reversing Air Flow
GMT facility in Chenango, NY
8. Positive w/Biofilter layer
Perforated trench covers at 7” pressure
Negative with Biofilter
Pulled from pile at 10” suction
Alternating Direction ASP
Lenz Enterprises, Stanwood,
Washington
9. Carefully & Completely
Mix
Bulking Agents
Dry, fine and coarse
materials must be added
to wet, dense feedstocks
Up to 2/3rds of the mix
might be bulking agents
Bulk density below 800
lbs./cubic yard is best
Higher initial moisture
levels are targeted 60%
to 65%
Blended thoroughly
Proper Pile Mixture & Preparation
Vision Recycling, Santa Cruz, CA
11. Over head watering prior
to turning
Conveyor spray bars
Moisture Additions and Replacement
12. High Tech or
Low Tech?
Whether in-vessel or
in-open pile, aerated
static piles can be
expensive or cheap,
but either needs to be
filled carefully and
evenly to reduce short
circuiting of air flow.
Consistent porosity -
Consistent moisture -
No packing in or
driving on pile edges -
West
Yellowstone
Compost
Facility
Cold Creek Compost, Ukiah, CA
13. Pipes, trenches, spargers, cavities
Spargers in concrete, Land
Recovery, Puyallup, Washington
Above ground
perforated pipes
Trenches with
perforated covers
Spargers up through
concrete from pipe
manifolds
Under-pile cavity
forming system
ASP Air Distribution Systems
Cavity under pile, Silver Springs
Organics, Tenino, Washington
14. Covers used in the first weeks of composting
reduce compost emissions
Lifecycle VOC emissions from green waste
composting in windrows were measured at less than
one pound of VOCs per ton of compost feedstock
70-80% of the generation of VOC from Green Waste
Windrows occurred in the first 2 weeks
VOC emissions doubled by adding Food Waste
Using compost as a cover reduced emissions by 75%
compared to uncovered pile
San Diego State University - pseudo compost covers report
http://www.ciwmb.ca. gov/publications/organics/44207009.pdf
15. Primary Types of Compost Covers
Impermiable
Microporous Membrane
Spun or open weave
fabrics
Covers can help control
moisture levels
16. Covering piles
Covering piles
reduced the
temperature
variability
Condensate forms in
the top layer just
below the cover
Oxygen levels stayed
high and drying still
occurred through the
rest of the pile
Lenz Enterprises covered
piles trials
17. Large volumes of air are needed to maximize
Volatile Solids (VS) reduction!
Determining the Degree of
Aerobiosis of Composting
Materials
Maintaining oxygen
concentrations above 13% as
air left the pile reduced
anaerobic pockets
Oxygen consumption rates of
over 4.5 to 8.4 mg O2/g
vs*hr were observed and
these batches reduced VS at
a significantly higher rate
than those below 13%
Klauss, Papadimitriu in
ORBIT Bioprocessing of
Solid waste and sludge Vol 2
No.1, 2002
Air flow rates for a 3 meter
high pile should be 35-40
m³/hr/m² of floor area
during the high oxygen
demand period of
composting over the first 3
to 5 days. This provides
adequate cooling to <65° C
and keeps oxygen levels
above 13% for a green
waste/food waste blend.
This will then maximize VS
reduction and dry the pile.
18. Not enough air
flow?
Assisting
trench covers
Drill out larger holes in
plates, or add more
holes
Decrease mix bulk
density or pile height
Place coarse woody
material over the trench
covers
Or design the system
for higher pressures
and more air flow.
Port
Angeles
WWTP
WA
Lenz
Enterprises,
Stanwood
WA
19. Assisting
Above Ground
Pipe Systems
Similar techniques as
trench aeration
Positive air flow
during pile loading
reduces clogging
Notice darker
material on surface –
finished coarse
compost as a biofilter
layer
Dedicated smaller
single blowers per
pile can improve
efficiency
Positive Aeration
North Mason Fiber,
Silverdale WA
20. Assisting
Above Ground
Pipe Systems
Keep pile pipe lengths
relative to diameter or
hole spacing engineered
for even flow, pre-
perforated pipe does
not work for long pipe
runs
Step down manifold
diameters to maintain
air velocity
Keep pipe velocity
below 15 m/s
Seals are important for
zone dampers
Negatively aerated
ASP @ Washington
State University
21. Probe
locations
Where you monitor
oxygen or
temperature is
important to the
control of air flow
Multiple sensors on a
probe allow for
determining when to
reverse airflow
Checking the
representation of
probe placement is
important as well
22. Lowering pile
height
Temperature control
is easier the lower
you get
A single direction air
flow can reach
process temperature
extremes (>65°C) in
1.2 meters (4 feet)
Reversing air flow
allows for a 2.5
meter (8 feet) pile to
be effectively cooled
23. Turning and
rewetting
It is essential to allow
adequate moisture to
be replaced to
continue rapid
decomposition
Rewetting during
turning is the best
way to provide
uniform rewetting
Spray bar at end of discharge
conveyor, fed by a hose reel, Land
Recovery, Puyallup WA
24. Turned
windrow pile
stabilization
After well controlled
ASP for 10 to 14
days, biological
oxygen demand is
reduced enough to
allow compost to be
placed into a
windrow system.
Turning at least
every week for 2-4
weeks maintains
enough porosity and
speeds the
stabilization process. Lenz Enterprises finished material
heading to screener after 45 days
25. Extended Pile
Stabilization
This works even for
extended trapezoidal
pile systems. The air
flow continues
through large
particle
redistribution. Even
without forced
aeration
Lenz Enterprises' turned extended stabilization bed
achieved 340 tons per day capacity on less than 3
acres after 7 -10 days of ASP
26. Extended Pile
Stabilization
However, further use
of forced aeration
provides significantly
more drying and
cooling making
stable material in 21
days ready for curing
Compost Factory, Land Recovery
27. Finished Compost - Stable and cured in 34 days
Compost Factory, Land Recovery
28. ASP Lessons Learned when handling food wastes
Intensively manage the mixing, moisture and porosity in the
first few hours after receipt of organic wastes.
Place the mix in an ASP and cover it with a biofiltration layer
(or selective membrane) immediately, and aerate at a very
high rate of air flow for the first 3 to 5 days alternating air flow
direction to keep pile temps below 45 degrees C to assure pH
levels rise above 6.5
Then control the pile temperatures between 55 degrees C and
below 65 degrees C throughout the pile using alternating air
flow during the 3 day sanitation period and lower it again to
around 45 degrees
After 10 to 14 days, tear the ASP down, re-water and turn
using windrow turners to further stabilize and homogenize
the pile.
29. Suggested Reading
Sundberg, C. & Jönsson, H. 2008. Higher pH and
faster decomposition in biowaste composting by
increased aeration. Waste Management, 28(3): 518-
526.
Beck-Friis, Smårs, S., Jönsson, H., Eklind, Y. &
Kirchmann, H. 2003. Composting of source-
separated organic household waste at different
oxygen levels: Gaining an understanding of the
emission dynamics. Compost Science & Utilization,
11(1): 41-50.