High Yield Fermentation to Enhance Biological Phosphorus Removal

高产发酵增强生物除磷

• 批准号: 9362161
• 负责人: Thomas Coleman
• 金额: $ 6.5万
• 依托单位: Gray & Osborne Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-03-15 至 1994-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9362161&HistoricalAwards=false
• 关键词: Yield; Fermentation; Enhance; Biological; Phosphorus

9362161 Coleman The objective of this project is to evaluate a biological nutrient removal process that provides an alternative to chemical treatment methods, which produce a residue for disposal. The success and reliability of the biological process depends on the ability to produce a fermentation product from the wastewater; namely acetate and propionate. Primary treatment sludge is fermented to provide additional acetate, but where this has been used, the acetate production has been below theoretical expectations. This may be due to the growth of other sulfate reducing and methane forming organisms that consume the acetate. The process to be evaluated in this project involves a primary sludge fermentation system that uses intermittent oxygenation to inhibit the organisms and thus greatly increase the fermentation yield. Experiments designed to test this concept will also investigate the use of oxidation-reduction potential measurements to control the process. A higher acetate and propionate production will greatly improve the reliability and performance of biological phosphorus removal systems. Experiments are designed to test this innovative concept using primary sludge at the City of Yakima WWTP. Oxygenation frequency, duration and control methods will be studied and the effect on acetate and propionate yield will be followed. This is a Phase I award based on a proposal submitted in response to NSF 93-18, Small Business Innovation Research (SBIR) Program Solicitation. An improved primary sludge fermentation process with a process control system using ORP measurements is expected. This involves process technology, equipment design and a process control system that can be marketed. There is a significant need for improved technology for biological phosphorus removal economically competitive with chemical treatment systems.

9362161科尔曼本项目的目的是评估生物营养物去除过程，提供了一种替代化学处理方法，产生的残留物进行处置。 生物过程的成功和可靠性取决于从废水中产生发酵产物的能力;即乙酸盐和丙酸盐。 一级处理污泥发酵以提供额外的乙酸盐，但在使用这种方法的情况下，乙酸盐产量低于理论预期。 这可能是由于消耗乙酸盐的其他硫酸盐还原和甲烷形成生物体的生长。 本项目拟评价的工艺涉及初沉污泥发酵系统，该系统采用间歇充氧抑制微生物，从而大大提高发酵产率。 旨在测试这一概念的实验也将研究使用氧化还原电位测量来控制这一过程。 较高的乙酸盐和丙酸盐产量将大大提高生物除磷系统的可靠性和性能。 实验旨在测试这一创新的概念，使用初级污泥在城市的亚基马污水处理厂。 将研究加氧频率、持续时间和控制方法，并跟踪对乙酸盐和丙酸盐产量的影响。 这是一个第一阶段的基础上提交的建议，以响应NSF 93-18，小企业创新研究（SBIR）计划征求。 一个改进的初级污泥发酵过程中的过程控制系统，使用氧化还原电位测量是预期的。 这涉及到工艺技术、设备设计和可以销售的过程控制系统。 非常需要与化学处理系统在经济上具有竞争力的生物除磷的改进技术。