Trickling filter

About: Trickling filter is a research topic. Over the lifetime, 1098 publications have been published within this topic receiving 20219 citations.

Biological removal of ammonia and nitrate from metal processing wastewater

Abstract: Although several nitrification / denitrification processes are established for the removal of ammonia and nitrate from municipal and industrial wastewaters, there are few reported results on the removal of these ions from metal processing and finishing wastewaters. Sources of ammonia and nitrate in the wastewater include the use of ammonium-nitrate-fuel oil as a blasting agent, and the use of other nitrogen-containing reagents during processing. Unlike municipal wastewater, there is very little organic content in metal processing wastewaters. The objective of this work was to develop a biological process for the removal of nitrogenous compounds from metal processing wastewater. The system comprised an aerobic continuously stirred tank reactor (CSTR) followed by an anaerobic packed column and was run using real wastewater from a metal processing operation. The system was inoculated using humus sludge from a municipal trickling filter and a period of approximately 4 weeks was required for a denitrifying biofilm to develop. Results showed that ammonia removal occurred readily in the CSTR while nitrite oxidation was slower to develop. The CSTR was found to be suitable for ammonia oxidation. The gravel-packed column reactor was found to be unsuitable for the removal of nitrate in the configuration used. An effluent that is low in nitrogen can be obtained with this system with additional carbon introduced after the CSTR. The critical parameters for denitrification are nitrate concentration, temperature, influent flow rate and mean cell retention time. By employing an integrated process comprising nitrification and denitrification, high nitrogen removal efficiencies can be obtained.

Take rotation spray device's bio -trickling filter

Abstract: The utility model discloses a take rotation spray device's bio -trickling filter, it includes bio -trickling filter body (14), installs filler (10) in bio -trickling filter body (14), install respectively in rotation spray device (11) and the backward flow pond (7) of bio -trickling filter body (14) upper portion and bottom, with consecutive mixed dashpot (5), evaporation tank (4) in backward flow pond (7) one side, and air compressor (1), with backward flow pond (7) continuous nutrition liquid bath (8) of opposite side, with hydraulic pump (9) that nutrition liquid bath (8) links to each other, hydraulic pump (9) link to each other with rotation spray device (11). The utility model provides a take rotation spray device's bio -trickling filter, structural design is reasonable, and convenient operation can evenly spray, the convenient scope of spraying of adjusting, the practicality is strong, and the range of application is extensive.

Treatment of Simulated Textile Wastewater Containing Reactive Azo Dyes Using Laboratory Scale Trickling Filter

Abstract: The present study was conducted to evaluate the potential applicability of biological trickling filter system for the treatment of simulated textile wastewater containing reactive azo dyes with bacterial consortium under non-sterile conditions. The percentage decolorization for the treatment of wastewater containing structurally different dyes was found to be higher than 95% in all trials. The stable bacterial count of the biofilm on stone media of the trickling filter during the treatment confirmed the presence, proliferation, dominance and involvement of the added microbial consortium in the treatment of textile wastewater. Results of physicochemical parameters revealed the reduction in chemical oxygen demand (58.5-75.1%), sulphates (18.9-36.5%), and phosphates (63.6-73.0%). UV-Visible and FTIR spectroscopy confirmed decolorization of dye containing wastewater was ultimate consequence of biodegradation. Toxicological studies revealed the nontoxic nature of degradative metabolites. Keywords—Biodegradation, textile dyes, waste water, trickling filters.