Progress 10/01/03 to 09/30/06
Outputs
This project has successfully tested MSL(Multi-Soil-Layer) Systems for their capability to remediate effluent from dairy lagoons. Dairy lagoons are a serious problem to the dairy industry in Hawaii and Island nations. The development of a technology that will assist in the remediation of effluents by processing them in a way that reduces their toxicity and pathogenicity would be very helpful. In addition, MSL systems have promise as a means to treat wastewater of many types, including domestic waste water and sewage water. Two improvements to the MSL system were developed during the course of a Ms student's thesis work -- one which increases the removal of P and one which increases the removal of N. These to improvements substantially advance MSL systems effectiveness. An International Patent has been applied for to secure these improvements and to permit widespread use in Hawaii and Island nations.
Impacts
We expect that the impact of this technology to be just beginning. We expect to improve the system performance more such that many types of agricultural and domestic waste water can be process for reuse as R1 water.
Publications
- 1. Pattnaik, Rosalin 2006 Soil processes to remediate dairy effluent using MSL (Multi-Soil-Layer) Systems. MS Thesis.
- 2. Pattnaik, Rosalin. October 18, 2006. Final MS Thesis Defense. Soil Processes to remediate dairy effluent using MSL(Multi-Soil-Layer) systems.
- 3. R. Pattnaik , R. S. Yost , G. Porter , T. Masunaga , and T. Attanandana, 2006 Removing the N and P in Dairy effluent using a Multi-Soil-Layer system. In review by The Journal of Applied Engineering
- 4. Pattnaik, R., R. S. Yost, G. Porter. 2006 Soil Processes to remediate dairy effluent using MSL (Multi-Soil-Layer) Systems. Poster presented at the American Society of Agronomy Annual Meetings, Indianapolis, Indiana, Nov. 12-16,2006.
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Progress 10/01/04 to 09/30/05
Outputs
The MSL technology has been implemented at a dairy effluent site and shows very good promise to remove N and P from effluent water to an extent that the water can be used for irrigation. The reduction in nitrate is to less than 10 mg nitrate / liter and the reduction in phosphate is to levels less than .2 mg/L. Some problems remain to resolve, including the observation that a lack of consistent application of liquid results in sharply lower removal efficiency. Some new results are that the inclusion of some of the soils of Hawaii -- that have strong structure may provide a more effective option in removal of P from the solutions than the original Japanese technology. This option has not been available until our research here in Hawaii. The patent application will be submitted in December, 2005.
Impacts
The impact of this technology remains very high. It is not clear what limitations there are on the application of the technology in Hawaii conditions. We are focusing on agricultural water wastes but the technology has potential for domestic sewage water processing as well.
Publications
- No publications reported this period
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Progress 10/01/03 to 09/30/04
Outputs
The Project Objective is To adapt and modify the MSL system to Hawaii and Tropical Island conditions. This includes optimizing three factors: 1) Identify the most efficient/effective local soil material. 2) Determine which locally available organic materials are the most suitable. 3) Determine functional combinations of loading rate and aeration. Our current results suggest that the use of local soil materials such as the Leilehua soil series leads to very high efficiency in removal of P and seems also to provide an excellent aerobic layer -- possibly replacing the use of perlite and zeolite. We have learned that wood shavings do not appear to be very effective in providing the necessary amounts of C necessary for efficient system operation. New systems have been constructed using much finer wood material such as sawdust and the results have been quite effective. Our experience with three types of systems suggests that the adjustment of flow and aeration continue to
be major factors in determining system efficiency in removal of contaminants. This result was also noted in Japan. Our other objectives of testing different effluents is not implemented at the present time. We do anticipate testing the systems for swine effluent cleanup later this year. Lastly, we have built three prototype systems and are currently testing them at one of the largest dairies on the island. Our newest prototype system is performing very well and is achieving a high degree of efficiency in removal of the contaminants nitrogen, phosphorus, and coliform bacteria.
Impacts
The MSL system approach that is being tested at a Waianae Dairy holds promise to be a revolutionary approach to treat wastes produced by a variety of agricultural operations. So far we are only testing on animal waste effluent cleanup and the results are extremely promising. A patent process has begun and we have also attracted investors to support the patent application.
Publications
- Porter, G., Pattnaik, R. and Zhou, Z. 2004. Use of a Multi-layering system for clean-up of animal waste effluent. Poster given at the American Society of Agronomy Meetings. Oct. 2004. Seattle, Washington.
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Progress 10/01/02 to 09/30/03
Outputs
No progress to report. This project was initiated on October 1, 2003.
Impacts
No impact to report. This project was initiated on October 1, 2003.
Publications
- No publications reported this period
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