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Evaluation of chemical polymers as coagulation aids to remove suspended solids from marine finfish recirculating aquaculture system discharge using a geotextile bag
Aquacultural Engineering ( IF 3.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.aquaeng.2020.102065
Tyler F. Gibson , Wade O. Watanabe , Thomas. M. Losordo , Robert F. Whitehead , Patrick M. Carroll

Abstract Traditionally used in the construction and excavation industries to remove solids from runoff, geotextile fabric tube (Geotube) technology has been adopted by freshwater aquaculture facilities as a method of effluent management. The effectiveness of a Geotube is improved by using chemical polymers to bind suspended solids in the effluent for greater retention; however, polymers used in freshwater systems may not be effective in marine systems. Using laboratory jar tests, seven organic polymers of different molecular weights and ionic charges were evaluated at doses ranging from 0 to 50 ppm for solids removal efficiency (SRE) from effluent from a marine (33 ppt) finfish RAS growing black sea bass. Of the seven polymers screened, two cationic high molecular weight polyacrylamide polymers Drewfloc (DF) 2449 and DF 2468 had high SRE of total suspended solids (TSS) (36.1–84.4 %). Further tests using miniature geotextile bags confirmed that DF 2449 at 10 ppm and DF 2468 at 5 ppm had high SRE (73.3–75.9%) compared to the untreated control (43.4 %). When applied to a commercial-scale Geotube, DF 2449 at 10 ppm removed 92.1 % of the TSS in the effluent of the marine finfish RAS growing black sea bass. Rinsing the saline biosolids with freshwater at a rate of 1.63 L per 100 g dry solids reduced the salinity to

中文翻译:

使用土工布袋评估化学聚合物作为凝结助剂去除海水有鳍鱼类循环水产养殖系统排放物中的悬浮固体

摘要 土工织物管(Geotube)技术传统上用于建筑和挖掘行业从径流中去除固体,已被淡水水产养殖设施采用作为污水管理方法。土工管的有效性通过使用化学聚合物来结合流出物中的悬浮固体以提高保留率;然而,淡水系统中使用的聚合物在海洋系统中可能无效。使用实验室广口瓶测试,评估了 0 至 50 ppm 剂量范围内的七种不同分子量和离子电荷的有机聚合物对来自海洋(33 ppt)有鳍鱼类 RAS 生长黑鲈的流出液的固体去除效率 (SRE)。在筛选的七种聚合物中,两种阳离子高分子量聚丙烯酰胺聚合物 Drewfloc (DF) 2449 和 DF 2468 具有高总悬浮固体 (TSS) 的 SRE (36.1–84.4%)。使用微型土工布袋的进一步测试证实,与未处理的对照 (43.4%) 相比,10 ppm 的 DF 2449 和 5 ppm 的 DF 2468 具有高 SRE (73.3-75.9%)。当应用于商业规模的 Geotube 时,浓度为 10 ppm 的 DF 2449 去除了生长黑鲈的海洋有鳍鱼类 RAS 流出物中 92.1% 的 TSS。用淡水以每 100 克干固体 1.63 升的速率冲洗含盐生物固体,可将盐度降低至 10 ppm 的 DF 2449 去除了海洋有鳍鱼类 RAS 生长黑鲈的流出物中 92.1% 的 TSS。用淡水以每 100 克干固体 1.63 升的速率冲洗含盐生物固体,可将盐度降低至 10 ppm 的 DF 2449 去除了海洋有鳍鱼类 RAS 生长黑鲈的流出物中 92.1% 的 TSS。用淡水以每 100 克干固体 1.63 升的速率冲洗含盐生物固体,可将盐度降低至
更新日期:2020-08-01
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