Anaerobic digesters continue to be a focus for processing wastewater solids to produce a renewable fuel source, digester gas. Effective mixing of the digester contents is important for process stability, maximizing gas production, minimizing scum and foam formation, and preventing solids deposition in the digester. Mixing requires electrical power which is often generated by coal-fired power plants. With the concern regarding electrical power cost and the interest in reducing greenhouse gas emissions, there is a renewed focus on reducing the power required for digester mixing. This paper reports the test results of a new mixing system called the Vertical Linear Motion Mixer (VLMM) manufactured by Enersave Fluid Mixer, Inc which was shown to have comparable performance to other more conventional mixing systems (impeller draft tube mixers) with substantially less electrical power needed. The test results represent testing conducted at the Ina Road Wastewater Reclamation Facility (WRF), located in Tucson, Arizona. One new mixer was retrofitted to a conventional "pancake" digester and compared to an identical digester using five impeller draft tube mixers.

High spin states in the odd proton nucleus 129La have been investigated wing the techniques of in-beam y-ray spectroscopy. Nine rotational bands have been observed in '''La. seven for the first time. Various band crossings were observed at rotational frequencies in the range hw = 0.28-0.57 MeV. The data are mainly discussed within the frameworlt of the cranked shell model. The rotational bands are assigned quasiparticle configurations originating from zh,,lz, r g r l z . r(hlllz)2 @ r g 7 1 2 and rhlI/z @ v(hll/zgT/2) states, respectively. Four of the band crossinp are thought to be associated with the rotational alignments of the first pair of hI1/2 neutmns or protons.

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National Technical l nformation Service U.S. Department of Commerce any of their employees, contractors, subcontractors. or their employees, makes any r nprbaents that ita use by such third party would ORNLITM-6610 Distribution Category UC-77 Contract No. W-7405-eng-26 Metals and Ceramics Division Engineering Technology Division HTGR Fuel Recycle Development Program (189a OH0451 Fuel Refabrication-Task 500 DESIGN AND EVALUATION OF A NONDESTRUCTIVE FISSILE ASSAY DEVICE FOR HTGR

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