Simultaneous Removal of Pollutants and Recovery of Nutrients from High-Strength Swine Wastewater Using a Novel Integrated Treatment Process

Abstract

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 (NH4-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).

Real-Time Control Technology for a Bio-Liquor Circulation System in a Swine Barn with Slurry Pit: Pilot Scale Study

“…The increasing global population and changes in dietary habits have led to a rise in livestock farming worldwide. In 2018, 781 million hogs were raised globally and 11.2 million hogs were reared in South Korea [ 1 ]. The annual production of swine manure in South Korea exceeds 20.5 million tons, and accounts for 41% of the total domestic annual manure generation [ 2 ].…”

Development of a Real-Time Controlled Bio-Liquor Circulation System for Swine Farms: A Lab-Scale Study

“…Swine manure in Korea must be demarcated to solid and liquid fraction and then composted before application to arable lands, or purified prior to discharge into the environment. Most of the Korean swine farms possess on-farm manure treatment facilities, and more than 50% of the farms use aerobic biological treatment process for liquid composting [33]. In general, the treatment capacity of the cylindrical shaped liquid composters are above 200 tons.…”

Use of anaerobic filters filled with waste from the ceramics industry in swine wastewater treatment

“…Higher color removal values were found in research with other types of treatment: up to 92% removal using SWW electrolysis (CHO; LEE; RA, 2010), up to 98,9% removal combining biological treatment, struvite crystallization, and electrochemical treatment (SHIM et al, 2020), up to 97,8% removal using anaerobically digested swine wastewater using an intermittent cycle extended aeration system (DAN; RENE; LE LUU, 2020).…”