Institute of Environment and Ecology, Faculty of Forest and Ecology, Vytautas Magnus University, Agriculture Academy, Kaunas, Lithuania.
Institute of Hydraulic Engineering, Faculty of Water and Land Management, Vytautas Magnus University, Agriculture Academy, Kaunas, Lithuania.
Environ Sci Pollut Res Int. 2019 Jun;26(18):18752-18765. doi: 10.1007/s11356-019-04665-6. Epub 2019 May 4.
The most common source of pollution is wastewater that comes from the industrial, agricultural, and household sectors. The aim of this work is to evaluate the impact of a new innovative wastewater treatment technology on the water quality of the Leite River, Lithuania. The Leite River basin receives wastewater from the Leitgiriai agglomeration; it is then released into a channel, which is 73 m away from the river. During the implementation of the BSR Interreg project "Water emissions and their reduction in village communities in the Baltic Sea Region as pilots (VillageWater)," the ineffective Leitgiriai wastewater treatment plant (WWTP) was reconstructed in September and October of 2017. Water samples from Leite River were collected in 2010-2018 in three locations: near the Kulynai, Leitgiriai, and Sausgalviai villages in Lithuania. The results show that the wastewater treatment efficiency is statistically higher than that before the reconstruction of the WWTP. The treated wastewater (before and after reconstruction) is released from the Leitgiriai WWTP into the surface water (channel), which flows into the Leite River. The highest concentrations (according to all examined indicators) have been observed in the channel and in the Leite River 500 m after the release point before the reconstruction. All differences are statistically significant (p < 0.05). According to the 2018 values, the water quality of the Leite River did comply with the good ecological status/potential class indicators near the Leitgiriai village. After the Leitgiriai WWTP reconstruction, the wastewater treatment efficiency increased two times on average. Therefore, the Leite River water quality near Leitgiriai improved.
最常见的污染源是来自工业、农业和家庭部门的废水。本工作的目的是评估一种新型创新废水处理技术对立陶宛莱特河水质的影响。莱特河流域接收 Leitgiriai 集水区的废水；然后将其排放到一条距离河流 73 米的渠道中。在执行 BSR 跨区域项目“波罗的海地区村庄社区的水排放及其减少（VillageWater）”期间，2017 年 9 月和 10 月对效率低下的 Leitgiriai 废水处理厂（WWTP）进行了重建。2010 年至 2018 年期间，在立陶宛的 Kulynai、Leitgiriai 和 Sausgalviai 三个村庄附近的莱特河收集了水样。结果表明，废水处理效率在 WWTP 重建后具有统计学上的显著提高。处理后的废水（重建前后）从 Leitgiriai WWTP 排入地表水（渠道），然后流入莱特河。在重建前，在渠道和莱特河距排放点 500 米处观察到最高浓度（根据所有检查指标）。所有差异均具有统计学意义（p < 0.05）。根据 2018 年的值，Leitgiriai 村附近的莱特河水质符合良好生态状况/潜力类别指标。 Leitgiriai WWTP 重建后，废水处理效率平均提高了两倍。因此，Leitgiriai 附近的莱特河水质得到了改善。
