Source: GSS GROUP 'A LIMITED LIABILITY COMPANY' submitted to NRP
INCREASING PRODUCTION CAPACITY OF SMALL-SCALE HYDROPONIC GREENHOUSE FARMERS BY UTILIZING GREENHOUSE "DEAD-SPACE"
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
Reporting Frequency
Annual
Accession No.
1012571
Grant No.
2017-33610-26745
Cumulative Award Amt.
$100,000.00
Proposal No.
2017-00184
Multistate No.
(N/A)
Project Start Date
Jun 15, 2017
Project End Date
Jul 14, 2018
Grant Year
2017
Program Code
[8.12]- Small and Mid-Size Farms
Recipient Organization
GSS GROUP 'A LIMITED LIABILITY COMPANY'
1219 N STORER AVE STE 67
FAYETTEVILLE,AR 72703
Performing Department
(N/A)
Non Technical Summary
Small-scale hydroponic greenhouse farmers rely on current products to maximize their production potential. The highest selling commercial hydroponic systems for leafy green crops andstrawberry production are known as horizontal Nutrient Film Technique (NFT) systems. Though these systems are proven to be efficient and profitable, they limit the grower to a production capacity basedon a 2D plane resulting in "dead-space" along the side-walls of their greenhouses. The Cascading Water Disbursement Tower (CWDT) created by the PI is a unique vertical NFT tower that can be integrated into greenhouse production to utilize the created dead-space when using horizontal hydroponic systems. The product is light, efficient, one-component, and holds up to fifteen plants per tower. The SBIR Phase I will prove the products overall feasibility when integrated with existing horizontal systems. Since the product cannot be made by hand, a 3D printer will be used to produce up to 50 apparatuses to integrate into the research greenhouse at North Arkansas College. The college currently has horizontal NFT systems growingleafy greens making it the perfect scenario to conduct this research. If the product is proven feasible, it could increase existing hydroponic producer's production by up to 30%. This means that a hydroponic producer could have a means to scale up production without further investment into infrastructure resulting in up to $100,000 worth of savings. The apparatus is not limited to the commercial grower, but can be used by anyone who wishes to install a vertical hydroponic tower in an area that gets partial sun. The research conducted will prove its feasibility, perfect the design to become manufacture-friendly, and provide accurate data on its true potential to increase production in greenhouse dead-space.The apparatuses will be 3D printed and installed into constructed wall and ground mounts to hold the towers in place. Once installed, data on harvest dates, plant size, and plant densities will be collected at the time of harvest and throughout the growing process. The results will be used to market the efficiency of the product toward existing hydroponic system producers to gain support in manufacturing the product. GSS Group LLC is looking to patent the design and utility of the product and license it to hydroponic product manufactures.The ultimate goal of this project is to create the first "true" and integrate-ablevertical NFT tower on the market. This product was designed with the current small scale hydroponic farmer in mind. These farmers have made a dedication to producing high quality specialty products with sustainable methods. They should not be limited in product selections due to the competitive nature of current system producers. This product should disrupt the current hydroponic product market and force competitors to invest in further product development to enable small farmers to maximize production potential in greenhouses. Hydroponic systems should be designed to be easily integrate-able with other systems to allow for product diversification within the same grow space. Like the CWDT, they should also be designed for easy cleaning, harvesting, and transplanting.
Animal Health Component
50%
Research Effort Categories
Basic
25%
Applied
50%
Developmental
25%
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
20560303100100%
Knowledge Area
205 - Plant Management Systems;

Subject Of Investigation
6030 - The farm as an enterprise;

Field Of Science
3100 - Management;
Goals / Objectives
One major project goal is to test the feasibility of integrating the Cascading Water Disbursement Tower with existing horizontal hydroponic systems. The goal is to ensure that the apparatus will increase production without hindering plant growth in the existing horizontal systems. The objectives outlined to achieve this goal are: 1) Construct one system along each sidewall of the North Arkansas College research greenhouse adjacent their existing horizontal hydroponic systems. 2) Construct one stand-alone system to host at least ten CWDTs to compare lettuce growth rates and weight with those of the existing horizontal systems. 3) Collect data on plant growth rates and weight of harvested lettuce from all systems. (a) While the apparatuses are being printed, this will allow data to be collected on at least one growth cycle of lettuce grown in the existing horizontal systems before they are integrated with the CWDT system. The weight and growth rates will be compared to the weight and growth rates of the harvested lettuce after integration takes place. The other major project goal is to perfect and test ourvertical system designtohave the same favorable characteristics of current horizontal NFT designs. This project goal also includes testing the feasibility and manufacturability of a "one-component" vertical apparatus that achieves the cascading water disbursement effect.The project objectives outlined to achieve this goal are: 1) Use CAD software to "pre-test" the CWDT design to ensure a clean print. 2) Work with a mechanical engineer (professional) to assess the design's manufacturability. 3) Modify the design if found that amodificationwould provide a more "manufacture-friendly" product. 4) Print up to 50 apparatuses to integrate with the current horizontal systems in the greenhouse located at North Arkansas College.These major project goals are integral to moving forward into a Phase II project. Proving the feasibility of integrating vertical and horizontal systems while moving forward to perfecting a manufacture-friendly "one-component" CWDT will set the foundation when working with a third-party product development company in Phase II. Reaching the major goals outlined in Phase I will allow the Phase II process to progress as smoothly as possible. Due to the major need of a product to increase production of dead-space in greenhouse grow systems, the GSS Group is dedicated to ensuring that the finalized CWDT is feasible to integrate, one-component, and manufacture-friendly to reach a price-point that is attractive to the small-scale commercial grower.
Project Methods
GSS Group LLC's emphasis is on how existing small scale hydroponic growers can increase their production without further investment on infrastructure. After conducting dense research on the current systems available to the market today, the PI found that there was little to no effort put towards integrating systems. Rather, the market was only competitive. Furthermore, the vertical systems available today are either bulky, expensive, or inefficient and not developed for effective commercial production. Evaluating the issues with current vertical systems, GSS Group was able to design a simple, light, and efficient vertical tower. Unlike other competitors, the PI did not want to rush to the patent office and start heavily investing in manufacturing the product. With small-scale farmers in mind, the goal needed to be proving the true efficiency and compatibility of the CWDT with current horizontal systems that currently dominate the commercial market.The hypothesis is that the CWDTs unique water distribution method inside the apparatus makes the CWDT the first "true", one-component, vertical NFT system. To test this hypothesis, GSS Group will 3D print up to 50 full-scale apparatuses and grow multiple harvest cycles of lettuce crops in the systems. The experiment will include integrating the CWDT systems with existing horizontal hydroponic systems within the research greenhouse at North Arkansas College. The experiment will also include constructing a stand-alone system to collect data on lettuce grown within the CWDT system not integrated with existing horizontal systems.Data will be collected on growth rates, and potential problems encountered by picture and written diaries on a weekly basis along with harvest weights of all lettuce grown in all systems. All variables such as temperature, nutrient solution formulas, and pH will also be documented but remain constant and unchanged throughout the grow cycles. The data collection process will be as follows:1) While the apparatuses are printing at least one complete grow cycle will take place on the existing horizontal systems within the research greenhouse. Pictures will be taken of lettuce grown with a measuring stick to re-evaluate the growing process on the horizontal systems before integration with the CWDT system. After the lettuce has matured and is ready for harvest, the weights of each head will be documented. Pictures of the finished product will also be taken.2) After the CWDTs are printed, they will be integrated with the existing horizontal systems in the greenhouse. Once integrated, lettuce will be grown within the systems using the same variables as the horizontal systems. Pictures will be taken of lettuce grown with a measuring stick to re-evaluate the growing process after harvesting from the CWDTs. After the lettuce has matured and is ready for harvest, the weights of each head will be documented.The results will be analyzed by comparing data collected from both the unintegrated systems and integrated systems. Comparing the unintegrated system data including growth rate and harvest weight will show whether or not there is an advantage, disadvantage, or indifference to growing in the CWDT system vs. the horizontal hydroponic system. Data collected on the integrated system harvests including growth rates and harvest weight will be analyzed in comparison to the unintegrated horizontal system data to understand if there is an advantage, disadvantage, or indifference to integrating the CWDT system with existing horizontal hydroponic growing systems to utilize dead-space in the greenhouse.The project will be considered a success if the data collected on the unintegrated systems are either indifferent or if using the CWDT system results in a shorter growth cycle and/or heavier lettuce weight at the time of harvest. The project will be considered a success if the data collected on the integrated horizontal and CWDT system lettuce harvest weight and growth rate is indifferent. The results should conclude that by integrating the CWDTs with the existing systems, lettuce harvested from both systems should be around the same growth rate and harvest weight.Once the conclusion of an overall project success is determined, GSS Group LLC will begin efforts to introduce this knowledge to the target audience through publications and social media. This process will not be done before a non-provisional patent is filed on the utility and design of the apparatus and its water disbursement technology.Upon success of the project, evaluation will include measurable indicators that the use of the CWDT vertical hydroponic system will, in fact, increase overall production in a greenhouse by utilizing the dead-space created by horizontal hydroponic systems. The indicators including that integration of systems results in no hindrance on lettuce growth rate or harvest weight in horizontal systems will provide evidence of the potential impact of manufacturing the CWDT for the public. The success of this project will progress the industry toward creating more sustainable and efficient hydroponic systems that keeps the small-scale commercial hydroponic farmer in mind.

Progress 06/15/17 to 07/14/18

Outputs
Target Audience:GSS Group LLC utilized USDA SBIR Phase I funding to research, develop, and test a prototype of the company's Cascading Water Disbursement Technology or CWDT vertical hydroponic tower. Though the project duration period focused solely on prototyping and testing the apparatus, the project gained much interest and support by audiences in Arkansas. The research was hosted at North Arkansas College in Harrison, Arkansas and was witnessed by attending students. The college was able to incorporate the research into plant course curriculums and spark interest and inspiration of class participants. The company was also able to reach out to active hydroponic farmers to showcase the technology and has secured volunteers to test working prototypes within their current operations. During the project period, GSS Group reached out to a large-scale horticulture product distribution company (GreenhouseMegaStore)to initiate a business relationship in regards to potentially securing the technology's first buyer. Lastly, the company was able to secure additional funding to micro-manufacture complete system prototypes to incorporate into existing farming operations. This will allow the company to finalize any changes required by the customer to achieve maximum competitiveness. Changes/Problems:The company experience some major challenges that resulted in making some changes to the research process. The first major challenge involved the delayed arrival of the most important piece of equipment, the 3D printer. This 3 month delay caused the PI to initiate a no-cost extenstion to the SBIR Phase I program in order to complete the project's major goals. The extention was approved. The second major challenge involved the prototyping process. Units were printed using a g-code that was calculated by the host software. Unfortunately the g-code did not result in a water-tight prototype. This was a major set back because to the naked eye, the prints seemed to hold water. Only after the prototypes were installed (and over 20 printed) did the PI notice water leaking from between the print seams on each apparatus. The PI was forced to remove the units and seal them with a waterproof sealant before they could be re-installed for testing. This resulted in approximately twomonths time lost. This challenge also resulted in the prototypes not able to be re-used. The only sealant strong enough to fill all print seams was considered toxic for human consumption. None of the plants grown within the prototypes could be eaten, therefore, the prototypes are considered useless and must be discarded after the research period. The company was awarded additional funding (state-level funding in the amout of $50,000) to fix the g-code error and print prototypes that can be used by the target audience by the end of 2018. Another major change includedthe CWDT design. Origionaly the company was seeking to create a one-component apparatus. After much debate with manufacturing professionals and engineers, it was decided that due to the design's internal complexity, it would be best to manufacture the CWDT tower as a "stackable" vertical growing apparatus. With this design modification, the company can utilize the benefits of the cascading water disbursement technology along with allowing more flexability to the tower hieght and plant holds. The stackable units are also an ideal size to fit within a dishwater for the addressable market indicated in the proposal. Multiple variables were identified that could potentially result in the measurements collected from the lettuce varieties harvested after the CWDTs were installed in May 2018. It was found that the greenhouse orientation at North Arkansas College is not common to the industry. In most circumstances, commercial greenhouses are orientated so that the front is facing East. This allows the greenhouse glazing to be "south-facing" to achieve minimal shading and maximum usage of sunlight. Though common practice, North Arkansas College was forced to opt-out of this proper placement due to location constraints. Instead, the front of the greenhouse faces North. This caused the greenhouse glazing to be "east-facing" and resulted in an increase of shading once the CWDTs were installed. Another variable includes extreme temperatures. Plants grown before the CWDT systems were installed, were grown in more favorable temperatures (September 2017- May 2018). Although the rented facility was considered a "controlled environment" greenhouse; it only relies on evaporative cooling equipment to reduce the temperature. To effectively cool a greenhouse in the summer months, growers use additional methods, such as shade-cloths, to further reduce the temperature. The North Arkansas College greenhouse did not have access to a shade cloth. Even with the evaporative cooler, crops grown during the summer months were exposed to extreme conditions of temperatures averaging in the 90s to sometimes above 100 degrees (F) (June 2018- August 2018). The 'Sweet Crisp' varieties were most hardy for the extreme heat; thus, the red and green variety was chosen to finish the project. Though hardy, the lettuce may have been stunted in growth. What opportunities for training and professional development has the project provided? Nothing Reported How have the results been disseminated to communities of interest? Nothing Reported What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? Though the company experienced a few challenges that resulted in re-prioritizing some of the original major goals; the USDA SBIR Phase I Project resulted in major accomplishments towards developing a new vertical hydroponic technology for farmers. Challenges with micro-manufacturing (3D printing) the prototypes resulted in a loss of 6 months of time. The team moved forward withestablishing two of the three mounts within the North Arkansas College greenhouse. Both mounts were placed along the sidewalls of the greenhouse and hosted up to ten CWDT towers. Data was collected from over 12 harvests of lettuce grown within the horizontal system before the tower mounts and towers could be installed. Harvest data was then collected from plants grown on the vertical systems and the horizontal systems after installation. The limitations of manufacturing capabilities resulted in the "one-component" concept of the CWDT technology to be re-addressed. Manufacturing professionals and engineers advised the company on certain technical specifications of the CWDT that would not allow the apparatus to be manufactured as one piece. They did, however; advocate for the simplification of vertical hydroponic towers and the company was able to proceed with designing a manufacture-friendly tower. The new design still utilizes the original cascading water disbursement technology while eliminating unnecessary components required to effectively distribute nutrients and water to each plant within the system. The redesign also proved to be more ideal for farmers seeking to increase production capacity within existing growing operations because the redesign height can be manipulated to fit their unique system needs.

Publications