ABSTRACT

The aim of the work was to assess the efficiency of ozonation and ozonation in combination with H₂O₂ in jet loop reactor to increase biotreatability of persistent veterinary antibiotic Tiamulin. The efficiency of oxidative processes was monitored by combined approach based on determination of efficiency of wastewater treatment and impact to waste sludge stabilization. Degradation of Tiamulin in model wastewater (100 mg L⁻¹) during oxidation was followed by COD and DOC measurements while changes in biodegradability were determined by respirometric measurements. Biogas production potential was also determined to identify problems related to anaerobic digestion of waste sludge resulted in treatment of Tiamulin-contaminated wastewater. At ozone dose of 69 g_ozone g_COD ⁻¹ and 220 g_ozone g_DOC ⁻¹removal for COD and DOC was 26% and 17%, respectively. Better biotreatability was confirmed by respirometric testing. H₂O₂ addition did not improve removal efficiency (11–13%). The second stage of nitrification was suppressed by the addition of Tiamulin and ozonation again recovered $\mathrm{N}\text{-}{\mathrm{NO}}_3^{-}$ formation. O₃/H₂O₂ treated sample reduced the nitrification, especially formation of $\mathrm{N}\text{-}{\mathrm{NO}}_2^{-}$ in the first phase of the process. Simultaneously, quadratic model was developed to describe the relationship between oxygen uptake rate and changes in ammonium nitrogen concentration due to the oxidative treatment. The positive impact of ozone was also confirmed by ozonation of Tiamulin-contaminated (400 mg L⁻¹) waste sludge where biogas production potential was increased for 6-times. Combination of approaches confirmed, that O₃ effectively increase the treatability of Tiamulin in wastewater and sludge while addition of the hydrogen peroxide generally did not improve the performance of the processes.

摘要

这项工作的目的是评估喷射回路反应器中臭氧化和臭氧化与H ₂ O ₂结合的效率，以增加持久性兽用抗生素Tiamulin的生物处理能力。通过确定废水处理效率和对污泥稳定化的影响，通过组合方法监测氧化过程的效率。氧化期间，模型废水（100 mg L ^-1）中的Tiamulin降解，然后进行COD和DOC测量，同时通过呼吸测定法确定生物降解能力的变化。还确定了沼气的生产潜力，以确定与厌氧消化废污泥有关的问题，这些问题导致了处理钛木林污染的废水的处理。臭氧剂量为69克时_臭氧克_COD ^-1和220克_臭氧克_DOC ^-1的去除量分别为26％和17％。呼吸测试证实了更好的生物治疗性。加入H ₂ O ₂不能提高去除效率（11-13％）。加入Tiamulin抑制了硝化的第二阶段，并再次恢复了臭氧作用$\mathrm{ñ}\text{--}{\mathrm{没有}}_3^{-}$编队。O ₃ / H ₂ O ₂处理的样品减少了硝化作用，尤其是$\mathrm{ñ}\text{--}{\mathrm{没有}}_2^{-}$在过程的第一阶段。同时，建立了二次模型来描述氧吸收率与氧化处理引起的铵态氮浓度变化之间的关系。臭氧的积极影响还通过对Tiamulin污染（400 mg L ^-1）的废泥进行臭氧处理而得到证实，其中沼气的生产潜力提高了6倍。多种方法的组合证实，O ₃有效地提高了Tiamulin在废水和污泥中的可处理性，而添加过氧化氢通常不会改善该过程的性能。