Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, West Bengal, Pin -721 302, India.
School of Civil Engineering, Kalinga Institute of Industrial Technology (KIIT) Deemed to be University, Bhubaneswar, Odisha, Pin - 751 024, India.
J Environ Manage. 2022 Jan 15;302(Pt A):114037. doi: 10.1016/j.jenvman.2021.114037. Epub 2021 Nov 8.
Selection of aerator is a very important aspect in aquaculture operations. The selected aerator must be economically efficient and should be able to fulfil the requirement of oxygen supply in the pond water. In the present study, economic feasibility of nine different types of aerators, namely, perforated pooled circular stepped cascade (PPCSC), pooled circular stepped cascade (PCSC), circular stepped cascade (CSC), paddle wheel (PWA), spiral aerator (SA), propeller-aspirator-pump (PAA), submersible (SUBA), impeller aerator (IA) and air-jet aerator (AJA) was assessed based on capitalization method, a life cycle costing (LCC) approach. The results revealed that the PPCSC aerator can be considered as the most suitable aerator when dissolved oxygen (DO) content in the pond water is less than equal to 3 mg/L, and pond water volume (V) is less than 2100 m. In other situations, mostly when pond water volume is more, IA proves to be the most suitable aerator, followed by PWA, PPCSC, and other available aerators. The sensitivity analysis conducted by using varying stocking density and capital cost also showed the same trend with regard to selection of aerators. This life cycle costing approach for selection of aerator can be implemented for any types of cultured species at any prevailing environmental conditions.
增氧机的选择在水产养殖中是一个非常重要的方面。所选增氧机必须具有经济效益，并且能够满足池塘水中的氧气供应要求。在本研究中，根据资本核算方法（一种生命周期成本（LCC）方法）评估了九种不同类型的增氧机，即穿孔池圆形阶梯式瀑布（PPCSC）、池圆形阶梯式瀑布（PCSC）、圆形阶梯式瀑布（CSC）、桨轮（PWA）、螺旋增氧机（SA）、螺旋桨-吸入泵（PAA）、潜水（SUBA）、叶轮增氧机（IA）和空气射流增氧机（AJA）的经济可行性。结果表明，当池塘水中的溶解氧（DO）含量小于等于 3mg/L 且池塘水体积（V）小于 2100m 时，PPCSC 增氧机可以被认为是最合适的增氧机。在其他情况下，当池塘水体积较大时，IA 被证明是最合适的增氧机，其次是 PWA、PPCSC 和其他可用的增氧机。通过使用不同的放养密度和资本成本进行的敏感性分析也表明了在选择增氧机方面的相同趋势。这种用于选择增氧机的生命周期成本方法可以在任何现行的环境条件下应用于任何类型的养殖物种。
