One of the most fertilizing effluents for irrigation are those from fish farms. In drip irrigation systems, emitter clogging is the biggest problem of the effluent application. Therefore, the aim of this paper was to assess the clogging rate of a drip irrigation system using the effluent of a rainbow trout farm. A control treatment with the input fish farm freshwater and two more using fish farm effluent, with and without irrigation lateral drainage, were tested. Pressure compensating emitters Microflapper with nominal discharges of 4 and 8 L/h (M4, M8) and Netafim with discharges of 4, 8, and 12 L/h (N4, N8, and N12) were used. For each treatment, 42 irrigations events were carried out with a total of 336 h over a 4-month period. Each irrigation event lasted 8 h every 3 days. Clogging rate, Christiansen uniformity (CU) and emission uniformity (EU) coefficients were utilized for assessing the hydraulic performance of emitters. There was no emitter completely clogged during the experiment. However, as the clogging rate gradually increased, lateral discharges during the irrigation season decreased to a maximum of 57% of the initial value in some laterals. Evolution of the clogging rate was unstable, especially in the control treatment. N4 emitter show the best performance regardless of the quality of irrigation water. The clogging rates of M4 and N8 emitters were significantly (p < 0.05) higher when effluent was used. The N12 and M8 emitters had the highest sensitivity to clogging, without differences between treatments. Results show the dependence of clogging rate on emitter type and its discharge. The CU as well as EU for all emitters and treatments were higher than the allowable minimum. Lateral drainage had the greatest impact on the N12 and M8 emitters, which had the highest discharge. Moreover, some relationships between CU and clogging rate were obtained. It is generally possible to use the rainbow trout effluent in a drip irrigation system with pressure compensating emitters.

中文翻译：

---

虹鳟鱼养殖场出水灌溉压力补偿滴头的堵塞率

用于灌溉的最能施肥的污水之一是来自养鱼场的污水。在滴灌系统中，滴头堵塞是污水应用的最大问题。因此，本文的目的是评估使用虹鳟鱼养殖场废水的滴灌系统的堵塞率。对输入养鱼场淡水的控制处理和使用养鱼场废水的另外两种处理进行了测试，有和没有灌溉侧向排水。使用了额定流量为 4 和 8 L/h（M4、M8）的压力补偿发射器 Microflapper 和流量为 4、8 和 12 L/h（N4、N8 和 N12）的耐特菲姆。对于每个处理，在 4 个月的时间里进行了 42 次灌溉事件，总共 336 小时。每个灌溉事件每 3 天持续 8 小时。堵塞率，Christiansen 均匀度 (CU) 和排放均匀度 (EU) 系数用于评估灌水器的水力性能。实验过程中没有发射器完全堵塞。然而，随着堵塞率逐渐增加，灌溉季节的侧向流量在一些侧向下降至初始值的57%。堵塞率的演变是不稳定的，特别是在控制处理中。无论灌溉水的质量如何，N4 排放器都表现出最佳性能。当使用流出物时，M4 和 N8 排放器的堵塞率显着（p < 0.05）更高。N12 和 M8 发射器对堵塞的敏感性最高，处理之间没有差异。结果显示了堵塞率对发射器类型及其排放量的依赖性。所有排放源和处理的 CU 和 EU 均高于允许的最小值。横向排水对排放量最高的 N12 和 M8 排放器的影响最大。此外，还获得了 CU 与堵塞率之间的一些关系。通常可以在带有压力补偿发射器的滴灌系统中使用虹鳟鱼流出物。