Treatment of Train Laundry Wastewater for Recycling

Abstract

A new process has been developed in treating train laundry wastewater for recycling. In the work, the process of coagulation-sedimentation and SBR has been researched, the results has shown that the characters of the wastewater was great improved by coagulation-sedimentation under the conditions of 80mg/L of PAC as coagulant and 30mg/L of APAM as coagulant aid, and then by SBR under the conditions of 2.0h of anaerobic time, the effluent concentration could achieve the reuse standard of GBT18920-2002, and it could be applied for miscellaneous use.

Treatment of the railway freight wagon wash effluents by coagulation methods on accelator reactor

“…This way of mass transportation is most often associated with a permanent change in transported cargos during the time and a significant change in a type and amount of residues on surfaces contaminated by transported goods [8][9][10][11]. Intensive use of transport fleets is inseparably connected with the necessity of cleaning dirty wagon surfaces and generation of wastewater loaded with the composition of pollutants as a function of the characteristics of transported materials [12][13][14][15][16][17][18][19][20]. An optimal organizational solution is a group cleaning of the transport fleet in a form of collective wagon washes to eliminate dispersed sources of wastewater and other wastes from the ones generated in the processes of wagon cleaning [21][22][23][24][25][26][27][28].…”

“…Then, the generated wastewater will mostly be characterized by significant differences in composition and concentration of TSS, T a , mainly caused by the presence of colloidal systems, the content of the sum of soluble mineral and/or organic substances TDS, as well as TC (total conductivity). COD & BOD 5 and occasional color, as well as traces of oil, fat and/or oil derivatives included in the FOG (fats, oils & grease) index [8][9][10][11][19][20][21][22][23] are also of less significance. Values of these parameters depend on the physical state, chemical composition, fragmentation, moisture content, heterophasic scale, packaging methods and tightness of packaging, as well as long-term repeatability of the category of transported materials [9,11].…”

The Influence and Application of Slag, Fly Ash, and Limestone Flour on Compressive Strength of Concrete Based on the Concrete Compressive Strength Development over Time (CCSDOT) Model

“…Adding limestone flour into concrete as a partial cement replacement has been a research hotspot over the past two decades. One of the most common utilizations for limestone flour, cited in the open literature, is as a mineral admixture to improve workability of concrete [5,18,19]. Moreover, limestone flour works well in reducing the expansion associated with sulfate attacks [20] and decreases the cumulative amount of heat produced during hydration [21].…”