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首页> 外文OA文献 >Performance of a Pilot-Scale Air Sparged Continuous Flow Reactor and Hydrocyclone for Struvite Precipitation and Removal from Liquid Swine Manure
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Performance of a Pilot-Scale Air Sparged Continuous Flow Reactor and Hydrocyclone for Struvite Precipitation and Removal from Liquid Swine Manure

机译：规模化空气喷射连续流反应器和水力旋流器用于鸟粪石沉淀和从猪粪中去除的性能

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The objective of this research was to test a pilot-scale air sparged tank reactor (ASTR) and the ASTR in combination with a hydrocyclone (called the pilot-scale ASTR-hydrocyclone system) on two swine manure slurries for struvite-based (MgNH4PO4-6H2O) phosphorus removal and recovery. The pilot-scale ASTR system operated at flow rates of 80 to 115 L/min and was based on the bench-scale design from Shepherd et al. (2007). The ASTR effluent was processed using a hydrocyclone separator for struvite separation and total phosphorus (TP) recovery. The pilot-scale ASTR-hydrocyclone system provided a 92% reduction of dissolved reactive phosphorus (DRP) in manure slurry from a swine finishing facility concrete storage tank and a 91% reduction of DRP in manure slurry collected from a swine finishing facility deep-pit under floor collection system. The pilot-scale ASTR-hydrocyclone system removed 18% of TP in swine manure from a concrete storage tank and 9% to 14% of TP in swine manure slurry from a deep-pit under floor collection system. The low TP recovery was attributed to the hydrocyclones inability to provide effective struvite separation as operated. Full-scale economics and implementation of the tested struvite-based phosphorus removal is discussed. A case study of a typical Iowa deep-pit swine production facility (10,000 head/year) indicated that the annual cost of struvite-based phosphorus removal using this system would be approximately $8.88/finished pig or $0.035/L manure slurry treated ($ 0.134/gal). This cost often exceeds produceru27s profit margins; this indicates that struvite-based phosphorus removal using this ASTR-hydrocyclone system in swine finisher manure slurries is not currently economically viable.
机译：这项研究的目的是在两种鸟粪石基（MgNH4PO4- 6H2O）除磷和回收。中试规模的ASTR系统以80至115 L / min的流量运行，并基于Shepherd等人的试验台规模设计。 （2007）。使用水力旋流器分离器处理ASTR废水，用于鸟粪石分离和总磷（TP）回收。中试规模的ASTR-水力旋流器系统使来自猪场设施混凝土储罐的粪肥中的溶解性活性磷（DRP）降低了92％，从猪场设施深坑收集的粪肥中的DRP降低了91％地板下收集系统。中试规模的ASTR水力旋流器系统从混凝土储罐中去除了猪粪中TP的18％，并从地板收集系统下的深坑中去除了猪粪浆中TP的9％至14％。 TP回收率低归因于水力旋流器无法在运行时提供有效的鸟粪石分离。讨论了基于鸟粪石的除磷技术的全面经济性和实施方法。对一个典型的爱荷华州深坑猪生产设施进行的案例研究（10,000头/年）表明，使用该系统去除鸟粪石基除磷的年成本约为每头肥猪8.88美元或每处理一头粪肥0.035美元（0.134美元）。 / gal）。此成本通常超过生产者的利润率；这表明在猪肥牛粪便中使用这种ASTR-水力旋流器系统基于鸟粪石的除磷目前在经济上不可行。

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