Massé D I, Croteau F, Masse L
Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Lennoxville, QC, Canada J1M 1Z3.
Bioresour Technol. 2007 Nov;98(15):2819-23. doi: 10.1016/j.biortech.2006.07.040. Epub 2007 Apr 2.
The objectives of the study were to measure the levels of manure nutrients retained in psychrophilic anaerobic sequencing batch reactors (PASBRs) digesting swine manure, and to determine the distribution of nutrients in the sludge and supernatant zones of settled bioreactor effluent. Anaerobic digestion reduced the total solids (TS) concentration and the soluble chemical oxygen demand (SCOD) of manure by 71.4% and 79.9%, respectively. The nitrogen, potassium, and sodium fed with the manure to the PASBRs were recovered in the effluent. The bioreactors retained on average 25.5% of the P, 8.7% of the Ca, 41.5% of the Cu, 18.4% of the Zn, and 67.7% of the S fed to the PASBRs. The natural settling of bioreactor effluent allowed further nutrient separation. The supernatant fraction, which represented 71.4% of effluent volume, contained 61.8% of the total N, 67.1% of the NH4-N, and 73.3% of the Na. The settled sludge fraction, which represented 28.6% of the volume, contained 57.6% of the solids, 62.3% of the P, 71.6% of the Ca, 89.6% of the Mg, 76.1% of the Al, 90.0% of the Cu, 74.2% of the Zn, and 52.2% of the S. The N/P ratio was increased from 3.9 in the raw manure to 5.2 in the bioreactor effluent and 9.2 in the supernatant fraction of the settled effluent. The PASBR technology will then substantially decrease the manure management costs of swine operations producing excess phosphorus, by reducing the volume of manure to export outside the farm. The separation of nutrients will also allow land spreading strategies that increase the agronomic value of manure by matching more closely the crop nutrient requirements.
本研究的目的是测量在消化猪粪的嗜冷厌氧序批式反应器（PASBRs）中保留的粪便养分水平，并确定沉淀后的生物反应器流出物的污泥和上清液区域中养分的分布。厌氧消化分别使粪便的总固体（TS）浓度和可溶性化学需氧量（SCOD）降低了71.4%和79.9%。随粪便进入PASBRs的氮、钾和钠在流出物中得以回收。生物反应器平均保留了进入PASBRs的磷的25.5%、钙的8.7%、铜的41.5%、锌的18.4%和硫的67.7%。生物反应器流出物的自然沉降实现了进一步的养分分离。占流出物体积71.4%的上清液部分含有总氮的61.8%、铵态氮的67.1%和钠的73.3%。占体积28.6%的沉淀污泥部分含有57.6%的固体、62.3%的磷、71.6%的钙、89.6%的镁、76.1%的铝、90.0%的铜、74.2%的锌和52.2%的硫。氮磷比从原粪便中的3.9增加到生物反应器流出物中的5.2以及沉淀流出物上清液部分中的9.2。PASBR技术将通过减少农场外需输出的粪便量，大幅降低产生过量磷的养猪场的粪便管理成本。养分的分离还将使土地施肥策略能够更紧密地匹配作物养分需求，从而提高粪便的农学价值。
