SBIR Phase I: Membrane Hydrogen Dissolution for Bioremediation of High Strength Nitrate Waste

* 9761250 Nemser 这是一个小企业创新研究第一阶段的建议。 某些补救设施产生含有高浓度亚硝酸盐和氯化脂肪烃的废物流。 这些可以用溶解的氢气作为电子供体进行生物破坏。 在脱氮和还原脱卤中，氢提供了优于其他有机电子供体的几个经济和操作优势。 限制氢气使用的因素是其低溶解度，即现有的商业气体溶解技术不能以安全、成本有效的方式溶解足够的氢气。 基于膜的气体溶解技术可以潜在地提供这些过程安全所需的氢气，但是适用于无气泡气体溶解的市售膜具有较差的性能、生物污染或两者兼而有之。 Compact Membrane Systems，Inc.开发了一种用于微孔膜的高透气性全氟聚合物涂层。 全氟聚合物涂层的光滑、无孔性质对生物污染具有高度抵抗性，尤其是与微孔疏水膜相比。 这种涂层可以消除性能、污垢和成本障碍，这些障碍妨碍在连续生物过程中使用基于膜的气体溶解技术。 拟议的研究将证明使用全氟聚合物涂层膜装置作为高浓度硝酸盐和亚硝酸盐的生物脱氮的氢源的技术可行性。 除了去除硝酸盐、亚硝酸盐和氯化烃外，这些全氟膜还可用于将许多其他气体转移到水中或从水中转移出来。 示例包括：生物反应器充氧以促进细胞生长、水产养殖充氧、废水充氧、饮用水臭氧化以提高质量和安全。 这一广泛的利用基础将带来商业成功的高可能性和大的销售基础，从而在补救市场上降低价格。 ***

*** 9761250 Nemser This is a Small Business Innovation Research Phase I proposal. Certain remediation facilities generate waste streams containing high concentrations of nitrite and chlorinated aliphatic hydrocarbons. These can be destroyed biologically using dissolved hydrogen gas as the electron donor. Hydrogen offers several economic and operational advantages over other organic electron donors in denitrification and in reductive dehalogenation. The factor limiting hydrogen use is its low solubility, i.e. existing commercial gas-dissolution technologies cannot dissolve sufficient hydrogen in a safe, cost effective manner. Membrane-based gas-dissolution technologies can potentially supply the hydrogen required for these processes safety, but commercially available membrane suitable for bubble-free gas-dissolution have poor performance, biological fouling, or both. Compact Membrane Systems, Inc., has developed a highly gas permeable perfluoropolymer coating for microporous membranes. The smooth, non-porous nature of the perfluoropolymer coating is highly resistant to biological fouling, especially compared to microporous hydrophobic membranes. This coating could remove the performance, fouling, and cost barriers that preclude the use of membrane-based gas dissolution technologies in continuous biological processes. The proposed study will demonstrate the technical feasibility of using perfluoropolymer-coated membrane devices as the hydrogen source for biological denitrification of high concentrations of nitrate and nitrite. In addition to nitrate, nitrite and chlorinated hydrocarbon removal, these perfluoromembranes can be used to transfer many other gases into or out of water. Examples include: oxygenation of bioreactors for enhanced cell growth, oxygenation of aquaculture, oxygenation of wastewater, ozonation of drinking water for enhanced quality and safety. This broad base of utilization should lead to both high probability of commercial success plus a large sales base to allow for lower pricing in remediation markets. ***