Suppr超能文献

评估凝血预处理对溶解空气浮选处理家禽加工废水中的效果。

Evaluating coagulation pretreatment on poultry processing wastewater for dissolved air flotation.

机构信息

Department of Biological and Agricultural Engineering, Louisiana State University & LSU AgCenter, Baton Rouge, Louisiana 70803, USA.

出版信息

J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(13):2069-76. doi: 10.1080/10934529.2012.695946.

Abstract

Eleven metal coagulants and one polyelectrolyte were assessed for their suitability in assisting a dissolved air flotation (DAF) system aimed at treating poultry processing wastewater. Preliminary jar tests determined that a combination of 800 mg/L of FeCl(3) (ferric chloride) and 900 mg/L of Floccin 1115 would provide the best treatment by removing at least 98% of the total suspended solids (TSS) and 97% of the volatile suspended solids (VSS), while providing a 97% increase in water clarity. Final flotation tests suggested that the flocculated particles could be carried to the surface with 40% recycle ratio of the DAF. The resulting supernatant indicated 94.7% increase in clarity (± 1.4%), 97.3% reduction in TSS (± 0.5%), 96.6% reduction in VSS (±1.1%), 91% reduction in chemical oxygen demand (COD), and nearly 100% removal of fats, oils, and greases (FOGs). Despite the high removal efficiencies, flotation was found not to be critically necessary for treatment because the high concentration of coagulants caused settling of the flocs to occur just as rapidly. Potential coagulant overdosing is suspected at the higher end of the tested coagulant concentrations due to limited alkalinity in the wastewater. However, lack of residual metal (coagulant) ions in water may be linked to reactions leading to phosphate precipitation. The exact effect of the competing phosphate reaction on treatment efficiency is not clearly evident from this present study.

摘要

评估了 11 种金属混凝剂和 1 种聚电解质,以确定它们是否适合用于辅助溶气浮选 (DAF) 系统,该系统旨在处理家禽加工废水。初步的搅拌试验确定,组合使用 800mg/L 的 FeCl3(三氯化铁)和 900mg/L 的 Floccin 1115 可以通过去除至少 98%的总悬浮固体 (TSS) 和 97%的挥发性悬浮固体 (VSS) 来提供最佳的处理效果,同时将水的清澈度提高 97%。最后的浮选试验表明,浮选过程中,40%的 DAF 循环比可以将絮体带到表面。结果表明,上清液的清澈度增加了 94.7%(±1.4%),TSS 减少了 97.3%(±0.5%),VSS 减少了 96.6%(±1.1%),化学需氧量 (COD) 减少了 91%,油脂去除率接近 100%。尽管去除效率很高,但浮选并不是处理所必需的,因为高浓度的混凝剂会导致絮体迅速沉淀。由于废水中的碱度有限,在测试的混凝剂浓度范围内,可能存在潜在的混凝剂超剂量问题。然而,水中残留的金属(混凝剂)离子缺乏可能与导致磷酸盐沉淀的反应有关。从本研究来看,竞争磷酸盐反应对处理效率的确切影响尚不清楚。

文献检索

告别复杂PubMed语法,用中文像聊天一样搜索,搜遍4000万医学文献。AI智能推荐,让科研检索更轻松。

立即免费搜索

文件翻译

保留排版,准确专业,支持PDF/Word/PPT等文件格式,支持 12+语言互译。

免费翻译文档

深度研究

AI帮你快速写综述,25分钟生成高质量综述,智能提取关键信息,辅助科研写作。

立即免费体验