1,740,046 research outputs found
Enhancement of Anaerobic Ammonium Oxidation (Anammox) Process: The use of one-pot synthesized nanoscale zero-valent iron (nZVI)
No full textAnammox process, which is a proven technology for sidestream nitrogen removal, still has a few challenges for mainstream applications in STPs. Different strategies are under evaluation in order to make it applicable for mainstream. One of the strategy that may be implemented is to use of zero-valent iron (ZVI) to enhance the activity of Anammox bacteria. This study aimed to evaluate the effect of ZVI on nitrogen removal and granulation performance of Anammox process. The focus was on nano-scale ZVI (nZVI) instead of its microsized counterpart due to its various benefits. An SBR system was operated for 234 days at various nZVI levels (0.04-500 ppb) and was followed by daily and instant NH4+-N and NO2--N removal rates, instant N2 gas production rates, qPCR analyses, EPS protein analyses and STEM images. The findings demonstrated the net positive effect of nZVI both on Anammox process efficiency and granulation of Anammox species. Copyright © 2017 Water Environment Federation
June 8-12, 1996, Baltimore Convention Center, Baltimore, Maryland, USA
No full text64 pages; available for download at the link below.Watershed '96, held June 8-12, 1996, in Baltimore, Maryland, was a resounding success, fully exemplifying its theme of "Moving Ahead Together". Approximately 2000 people participated in the conference. They came from a variety of backgrounds, including public education, government, state and local groups, researchers, public policy experts, and many others. Also, teleconference downlinks involved thousands of other participants at another 156 remote sites. The theme, "Moving Ahead Together" was realized not just through the number and diversity of participants, but also the range of conference activities and the manner in which conference participants worked together
Guide to Managing Peak Wet-Weather Flows in Municipal Wastewater Collection and Treatment Systems
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Maximum heat recovery and utilization system in a municipal activated sludge Fluidized Bed Incineration (FBI) plant: A case study for Bursa, Turkey
No full textAn innovative application of a heat recovery system (HRS) was introduced for the fluidized bed incineration (FBI) system designed for 400 tons per day dewatered municipal activated sludge in an advanced biological nutrient removal sewage treatment plant in Bursa, Turkey. The planned HRS will provide maximum heat utilization by recovering unused available heat in the flue gas through two different sets of heat exchanging systems. This planning aims to achieve autogenous operational conditions of the incinerators and generate 2.5 MW electricity. The present case study will provide an insight to similar real case applications about integration of a HRS into a conventional FBI plant. The design approach presented has significant impact on the overall operational efficiency and economy of the FBI applications for municipal activated sludge incineration. Copyright ©2016 Water Environment Federation
The use of combined partial nitritation and anammox process for mainstream sewage treatment
No full textApplication of Anammox process for sewage was investigated. A partial nitritation (PN) system and an Anammox (AN) system were started up using a mixed activated sludge seed from a local sewage treatment plant (STP). PN of sewage was studied under different operating conditions. Increasing free ammonia via pH adjustment in combination with limited dissolved oxygen and low sludge retention time was identified as the best operational strategy to obtain sustainable effluent from PN which is appropriate stoichiometrically for Anammox feeding. Optimized PN and enriched AN were operated in series by continuously feeding with grit chamber effluent of a local STP. The limiting step of the whole process was identified as partial nitritation. Anammox proceeded successfully. Denitrification activity simultaneously occurring with Anammox was found heavily dependent on the quality of PN effluent. PN effluent with low organic content resulted almost complete elimination of denitrification activity in AN reactor. Copyright ©2016 Water Environment Federation
Upgrading and Retrofitting Water and Wastewater Treatment Plants
No full textThis detailed manuel, from the Water Environment Federation, outlines procedures that will help water and wastewater treatment plant upgrading and retrofitting projects proceed smoothly and cost efficiently
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