Pollutant removal from swine wastewater and kinetics in constructed rapid infiltration system (CRI system). Issue 11 (12th May 2023)

• Record Type: Journal Article
• Authors: Jian, Yue; Zhu, Jiaming; Zeng, Yaqiong; Long, Dingbiao; Wang, Hao; Liu, Zuohua; Pu, Shihua
• Is Part Of: Environmental technology. Volume 44:Issue 11(2023)
• Page Start: 1642
• Page End: 1652
• Publication Date: 2023-05-12
• Subjects: Constructed rapid infiltration system -- swine wastewater -- hydraulic loading rate -- removal kinetics -- pollutants removal performance; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2021.2010130
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: The purpose of this paper is centred on the kinetics of removal of main pollutants in wastewater and to compared different hydraulic loading conditions of the constructed rapid infiltration system (CRI system) in terms of removal efficiencies, effluent concentrations, mass removal rate (MRR), and the first-order removal rate coefficient (k) of COD, TOC, NH4 + -N, TN, and TP. The results showed that the higher the hydraulic loading, the higher the effluent concentration. The results that synthesized hydraulic loading, effluent concentrations, removal efficiencies, and other conditions showed that the best hydraulic loading was 40 cm/d. When the hydraulic load was 40 cm/d, the effluent average concentrations of COD, TOC, NH4 + -N, TN, TP, Cu 2+ and the removal efficiencies were 27.31 ± 16.40 mg/L, 86.11%, 10.55 ± 5.25 mg/L, 84.64%, 0.59 ± 0.87 mg/L, 99.60%, 143.31 ± 14.77 mg/L, 7.04%, 5.64 ± 1.38 mg/L, 79.20%, and 0.13 ± 0.47 mg/L, 97.51%, respectively. According to a kinetic study of the primary pollutants, the MRR increased with an increase in the hydraulic loading, except for ammonia nitrogen. CRI-3, CRI-4 were high significant correlated with ammonia nitrogen (with R 2 = 93.65% and R 2 = 95.03%, respectively), while CRI-2, CRI-3, and CRI-4 were high significant correlated with total nitrogen (with R 2 = 94.56%, R 2 = 96.70% and R 2 = 96.56% respectively). GRAPHICAL ABSTRACT: UF0001