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Eco-Friendly Smart Farms Based On Nutrient Solution Recirculation
UV sterilization and microbial stability analysis used to recycle nutrient solution; proposed method minimizes the use of fertilizers and water by hydroponic farms
15-JUN-2021
UV sterilization and microbial stability analysis used to recycle nutrient solution; proposed method minimizes the use of fertilizers and water by hydroponic farms
NATIONAL RESEARCH COUNCIL OF SCIENCE & TECHNOLOGY
The development of new urban agriculture technologies, such as vertical and smart farms, has accelerated rapidly in recent years. These technologies are based on hydroponic cultivation in which plants are grown using nutrient-rich solutions rather than soil. Approximately 20-30% of the nutrient solutions used during hydroponic cultivation are discharged without being absorbed by the crops, and because most farmers in South Korea do not treat the discharged solutions, hydroponic farms contribute significantly to environmental pollution.
This problem can be reduced if hydroponic farms use a recirculating hydroponic cultivation method that reuses the nutrient solutions after sterilizing them with ultraviolet (UV) light, instead of discharging them. However, two main issues complicate the implantation of such recirculation systems. First, the potential for diseases and nutrient imbalances to develop owing to microbial growth in the recycled nutrient solutions must be eliminated. Second, the initial investment required to set up a recirculating hydroponic cultivation system is often prohibitive, costing hundreds of millions of Korean won per hectare.
However, a new study conducted by researchers at the Korea Institute of Science and Technology (KIST) proposes a method that can stably manage the microbial population in recirculating hydroponic cultivation systems. The research team, led by Drs. Ju Young Lee and Tae In Ahn of the Smart Farm Research Center, KIST Gangneung Institute of Natural Products, conducted an integrated analysis of the microbial growth characteristics by constructing a model that simulates the flow of water and nutrients, and the inflow, growth, and discharge of microorganisms in recirculating and non-circulating hydroponic cultivation systems. Their simulations revealed that the microbial population in recirculating hydroponic cultivation systems can be controlled by adjusting the UV output and the water supply. On the contrary, in non-circulating hydroponic cultivation, the microbial population fluctuates considerably depending on the amount of water used, increasing sharply if there is too little water.
KIST researchers are experimenting with a circulating hydroponic cultivation system. Credit: Korea Institute of Science and Technology (KIST)
High cost has restricted the use of UV sterilization systems in hydroponic farming in Korea And prompted the research team to develop their own UV sterilization system, with further studies underway to commercialize this system as an economical alternative to imported systems.
The results of the study have already received strong interest: the rights to the operation and management software technology for recirculating hydroponic cultivation has been acquired by Dooinbiotech Co., Ltd. for an advance fee of 80 million won (8.5% of the operating revenue), while an agreement is in place with Shinhan A-Tec Co., Ltd. for the advanced recirculating hydroponic cultivation technology for an advance fee of 200 million won (1.5% of the operating revenue). Commercializing the recirculating hydroponic cultivation system is expected to reduce fertilizer costs by approximately 30~40%, which equates to 30 million won per year based on a 1-hectare farm.
Commenting on the envisaged impacts of the study, Dr. Ju Young Lee said, "The developed system makes the transition to eco-friendly recirculating hydroponic cultivation systems an affordable option for many more farmers." Dr. Tae In Ahn added, "We are also developing software and operation manuals to guide farmers in managing the nutrient balance in the solutions to increase the number of farms using the recirculating hydroponic cultivation system."
Lead photo: THE INTEGRATED MODEL DESCRIPTION. view more
CREDIT: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY(KIST)
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The study was supported by the Ministry of Agriculture, Food, and Rural Affairs (Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry) and the Innovative Smart Farm Technology Development Program of Multi-agency Package. The research results are published in the latest issue of the Journal of Cleaner Production (IF: 7.24, ranked in the top 6.9% by JCR), a highly respected international journal in the field of environmental science.
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VIDEO: Common Mistakes When Setting Up Hydroponics
Even if you have a lot of guidance in setting up your grow space, you may make mistakes in the initial development stages
January 4, 2021 | By Joy King
Starting a hydroponics garden is thrilling. It's an exciting project where you can enjoy the progress your plants make over time. However, producing perfect plants requires some skill and attention to detail that take time to develop. Even if you have a lot of guidance in setting up your grow space, you may make mistakes in the initial development stages.
What is hydroponics?
Wikipedia describes hydroponics as "a type of horticulture as a method of growing plants, usually crops, without soil. It's become popular in vertical and indoor farming. Let's examine some common errors to avoid when setting up a hydroponics grow:
Ignoring plants
New growers may not devote the amount of time necessary to grow hydroponically. Some mistakenly believe that they can check in on plants on the weekend. But, a lot can go wrong if you're not regularly checking on them. Even if your system is fully automated through a grow controller, it's essential to check on your plants daily to ensure that everything is going smoothly.
Check that your automation system isn't clogged or failed in some other way. Once you are a more experienced grower, it will become easier for you to identify failures in your systems and problems with your plants since you're dedicating time to their wellbeing.
Going overboard
More is not always better, particularly in regards to plant growth. Often, problems arise in the grow room from a lack of experience in tending to plants grown hydroponically. It usually takes time to understand how to irrigate and fertilize plants properly. Overwatering is often detrimental to plants, and beginners often do not realize they are overwatering before it is too late. Excessive nutrients, or nutrient burn as it's referred to, is also a common problem for beginners.
Overcrowding plants
It is common for beginners to overestimate how many plants will fit in their grow space. When you first plant them, it may seem that your plants have a lot of room, but once they grow up, they will need that extra space to maintain growth. Be vigilant about removing excess plants and pruning if overcrowding seems like it will be a problem. When in doubt, err on the side of caution and plant fewer plants.
Sudden changes to the environment
You need to give your plants time to adjust when you make changes. One of the most common problems that beginners face is when they suddenly change the grow room's light levels or room temperature. Any sudden increase in light may cause leaf bleaching and burning. It's better that you make changes gradually, giving your plants time to adjust.
Final thoughts
There are many scholarly books on starting hydroponics grow room or space. Do your research and enjoy your hydroponic garden! It's a rewarding way to grow food, cannabis, or flowers.
Source: Growlink
Tags: Hydroponics, Nutrient Dosing System, Wireless Automation, Automated Grow System, Customer Service, Automated Grow Systems, Nutrient Delivery System, nutrients, automation
Hydroponic Nutrient Solution: A Must-Read Essential Beginner’s Guide
This article will teach you about hydroponic nutrient solutions and how to use them so you can hydroponically grow your own plants without worry
Many gardeners use hydroponics as their preferred way to grow plants because using a hydroponic nutrient solution ensures optimal plant growth. Using a hydroponic nutrient solution ensures that your plant’s roots get the nutrients they need from the water so they can grow with ease. This article will teach you about hydroponic nutrient solutions and how to use them so you can hydroponically grow your own plants without worry.
Macronutrients
Plants need macronutrients to be able to thrive and grow. The macronutrients that plants need are nitrogen, phosphorus, and potassium.
Nitrogen (N) - allows the plant to grow its leaves, its leaves’ colors, and provides amino acids, proteins, nucleic acid, and chlorophyll synthesis. When a plant is lacking in nitrogen, its leaves are typically a faded color and the plant grows at a slower rate.
Phosphorous (P) - is necessary for the synthesis of the plant’s DNA and RNA. It is also responsible for developing the plant’s stems, roots, flowers, and seeds. A deficiency in this nutrient leads to weak stems and leaves, and it causes root growth to slow.
Potassium (K) - synthesizes the proteins and carbohydrates of the plant. It helps develop the flowers, roots, and stems but not as much as compared to phosphorus.
Micronutrients
Alongside the macronutrients, plants also need micronutrients to grow. The nine micronutrients that a plant needs include:
● Boron: Works with calcium to help form cell walls by synthesizing the cell membrane’s structure and functions.
● Calcium: Works with boron to form cell walls
● Copper: activates enzymes and helps with respiration and photosynthesis.
● Iron: Forms chlorophyll, used in photosynthesis, and helps provide energy provision.
● Magnesium: catalyzes the growth process and helps makes oxygen during photosynthesis
● Sulfur: A component of two of the 21 amino acids that synthesize protein.
● Zinc: Helps form chlorophyll and assists with plant respiration and nitrogen metabolism
How to Form a Hydroponic Nutrient Solution
You can find a quality hydroponic nutrient solution at your local store, or you can create your own solution. It’s recommended for beginners to use store-bought solutions first, and once they get a hang of the hydroponic growing process then learning how to create your own hydroponic nutrient solution can be the next step.
Hydroponic nutrient solutions come in powder and liquid forms, which liquid forms being more popular to use. Since these liquid solutions are more concentrated, do not spill any on yourself or your plant. These typically come with pH buffers so you can test the water. You can mix the solution in the water, and it’s ready to go!
Make sure to choose a solution that is specifically made for hydroponic growing and not the all-purpose packages. Soil-grown plants have different needs than hydroponically grown plants. Try to purchase a 2 or 3 part hydroponic nutrient solution as well. This way you can mix in the solution depending on the needs of the plant at its specific life cycle. The 2 to 3-part solutions will contain separate packaging for macronutrients, a growing solution, and micronutrient solution depending on which one you get.
Want to Know More?
Now that you understand the basics of hydroponic nutrient solutions, you may want to learn more about hydroponic growing or growing plants at home! We at the Nick Greens Grow Team work diligently to provide the necessary research and information that covers everything from microgreen growing to hydroponics to way more!
Sign up for our new weekly microgreens class, which is held every Friday at 4:30 pm CST. Can’t make the class? Subscribe to our blog and YouTube channel for weekly updates about farming methods.
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This Month's Cafe Will Be Our "BACK to BASICS" Series."Hydroponic Nutrient Management Basics" - Sept 22, 2020 - 11 AM EST
Indoor Ag Science Cafe is an open discussion forum, organized by Chieri Kubota (OSU), Erik Runkle (MSU), and Cary Mitchell (Purdue U.) supported by USDA SCRI grants
September Indoor Science Cafe
September 22nd Tuesday 11 AM EST
Please Sign Up!
This Month's Cafe Will Be Our "BACK to BASICS"
Series
"Hydroponic Nutrient Management Basics"
by Dan Gillespie (JR Peters Inc)
Please sign up so that you will receive Zoom link info.
Indoor Ag Science Cafe is an open discussion forum, organized by Chieri Kubota (OSU), Erik Runkle (MSU), and Cary Mitchell (Purdue U.) supported by USDA SCRI grants.