Shim Soomin, Reza Arif, Kim Seungsoo, Ahmed Naveed, Won Seunggun, Ra Changsix
Department of Animal Industry Convergence, College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea.
Department of Environmental Science, College of Agricultural Sciences, IUBAT-International University of Business Agriculture and Technology, Dhaka 1230, Bangladesh.
Animals (Basel). 2020 May 12;10(5):835. doi: 10.3390/ani10050835.
In this study, a novel treatment approach combining biological treatment, struvite crystallization, and electrochemical treatment was developed and its efficiency for the simultaneous removal of pollutants and recovery of nutrients from high strength swine wastewater (SWW) was verified. For all the parameters, maximum removal efficiencies in the lab-scale test were obtained in the range of 93.0-98.7% except for total solids (TS) (79.4%). Farm-scale process showed overall removal efficiencies for total nitrogen (TN), total phosphorus (TP), soluble total organic carbon (sTOC), and color as 94.5%, 67.0%, 96.1%, and 98.9%, respectively, while TS, suspended solids (SS), ammonium nitrogen (NH-N), and ortho-phosphate (O-P) concentrations were reduced by 91.5%, 99.6%, 98.6%, and 91.9%, respectively. Moreover, the struvite recovered from SWW showed heavy metal concentrations within the range of the Korean standard for fertilizers and feedstocks and thus, suggesting its potential application as fertilizer and in animal feed production. Using the proposed process, the SWW was converted to liquid compost as a quick-acting fertilizer, struvite as a slow-release fertilizer, and the decolorized and disinfected effluent after electrochemical treatment was safe for discharge according to Korean standard. Therefore, the novel integrated treatment process used in this study can be considered as a solution for SWW management and for the simultaneous removal and recycling of nutrients (N and P).
在本研究中，开发了一种将生物处理、鸟粪石结晶和电化学处理相结合的新型处理方法，并验证了其从高强度猪废水（SWW）中同时去除污染物和回收养分的效率。对于所有参数，实验室规模试验中的最大去除效率在93.0 - 98.7%范围内，除了总固体（TS）（79.4%）。农场规模的工艺对总氮（TN）、总磷（TP）、可溶性总有机碳（sTOC）和色度的总体去除效率分别为94.5%、67.0%、96.1%和98.9%，而TS、悬浮固体（SS）、铵氮（NH-N）和正磷酸盐（O-P）浓度分别降低了91.5%、99.6%、98.6%和91.9%。此外，从SWW中回收的鸟粪石显示重金属浓度在韩国肥料和原料标准范围内，因此表明其在肥料和动物饲料生产中的潜在应用。使用所提出的工艺，SWW被转化为速效肥料液体堆肥、缓释肥料鸟粪石，并且电化学处理后的脱色和消毒废水根据韩国标准可安全排放。因此，本研究中使用的新型综合处理工艺可被视为SWW管理以及同时去除和回收养分（N和P）的一种解决方案。
