wastewater effluent dechlorination Articles

  • Factors Affecting Cyanide Generation in Chlorinated Wastewater Effluent Matrix

    ABSTRACTFalse positives for cyanide analysis in wastewaters have been reported. We examined the effects of storage time at high pH and of pH adjustments on the cyanide levels. Cyanide levels changed within the holding time allowed by Standard Methods. We also studied the difference in cyanide levels using two disinfection conditions -- breakpoint chlorination and chloramination. Glycine was used ...

  • Frances Kelsey secondary school advanced wastewater treatment constructed wetland and effluent irrigation

    Location: Mill Bay, B.C. Owner: School District No. 65 Description: Site constraints necessitated a 75.6 m3/d treatment and disposal system to serve 1,200 students. The system includes septic tank, equalization tanks, advanced activated sludge treatment plant with nitrogen and phosphorous removal, constructed wetland, storage tank, ...


    By NovaTec Consultants Inc.

  • The natural way to clean wastewater

    John Todd founded Ocean Arks International in the 1980s, where he started to experiment with processes that mimic natural ways to purify wastewater. He built a greenhouse and ran sewage through a series of tanks, with plants suspended in the flowing waters, and constructed marshes made of sand and gravel. No chemicals were added, but plenty of aquatic creatures from snails to small fish were ...


    By BioCycle Magazine

  • Home, Sweet Wastewater Building

    How can a wastewater treatment plant embedded into a neighborhood not use much landmass and be environmentally friendly and user-friendly all at the same time? One system aims to do all of the above. Why should a wastewater treatment plant always have to look like, well, a wastewater treatment plant?  A visual trip through project files of Aqueonics Inc., based in Greenville, SC, reveals photos ...


    By Aqueonics, Inc.

  • TDS and Sludge Generation Impacts from Use of Chemicals in Wastewater Treatment

    ABSTRACTThe paper analyses theoretically expected TDS changes resulting from use of typical chemicals and from biological treatment. This is compared with the experimental data from full-scale facilities and from bench tests. Sludge generation effects are also discussed with supporting data. INTRODUCTIONWith progressively more stringent limits and expanding list of controlled parameters ...

  • Meat Packing Wastewater Disinfection Difficulties Leads to a State of the Art Control System and Consistent Regulatory Compliance

    ABSTRACTJohn Morrell & Co. is a meat packing plant located in Sioux Falls, South Dakota. The facility also maintains a tertiary wastewater treatment facility with a direct discharge following treatment. The treatment facility had good effluent compliance history until the spring of 2001, when sporadic elevated levels of fecal coliform and infrequent spikes in chlorine residual were ...

  • Peracetic Acid – is it an Environmentally Friendly Alternative to Chlorine?

     ABSTRACT Concerns with chlorine disinfection have led to investigation of alternative disinfectants for use in the environmental arena. Are there environmentally safe alternatives to chlorine? Is peracetic acid one among these? Peracetic acid is one among several chemicals that have been touted as a replacement in recent years. Peracetic acid is very effective in killing bacteria, ...

  • Ravensview Water Pollution Control Plant - City of Kingston, ON, Canada

    THE CUSTOMERThe Ravensview Water Pollution Control Plant (WPCP) currently provides primary level treatment for wastewaterfromthe City of Kingston (including Pittsburgh Township and the Canadian Armed Forces Base located in Kingston). The existing process at Ravensview WPCP includes: mechanical screening for pre-treatment, primary treatment with chemical enhancement, sodium hypochlorite ...

  • A sustainable system to Weather all seasons - Case Study

    Aerator upgrades help wastewater treatment plant survive cold Vermont winters More than two decades ago, cold Vermont winters brought a small Wastewater Treatment Facility to a halt with brush rotor icing problems. A major upgrade that included the Aire-O2® aspirator aeration system ...

  • On Line Control Strategies for Disinfection Systems: Success and Failure

    ABSTRACTThere are many levels of automation for control of chlorination systems. To select the best control approach for a facility, both control strategies and chlorination chemistry must be understood. Permit conditions including organism concentrations and operating data must also be fully identified. Many States require compliance with organism concentrations, as well as residual chlorine and ...

  • The Light at the End of the Tunnel - How to Successfully Operate a UV Disinfection System

    ABSTRACTOver the past ten years, ultraviolet (UV) technology has become a commonly applied method of disinfecting of wastewater effluent. UV disinfection involves passing wastewater effluent through a confined chamber with rows of underwater lamps emitting UV energy. Viruses and bacteria become inactivated upon exposure to dosages of UV energy, thereby disinfecting the wastewater. The UV system ...

  • UV, a bright future for the water industry

    The use of Ultra Violet (UV) light has now become standard practice in most municipal waste water treatment processes.  Effluent is now starting to be recognised as a valuable resource, not a problem that needs to be dumped. Many waste water facilities are being renamed as water reclamation facilities, and whether the waste water is being discharged into a river, being used to irrigate ...


    By atg UV Technology

  • UV set to dominate the municipal industry

    The use of Ultra Violet (UV) light has now become standard practice in most municipal waste water treatment processes. Effluent is now starting to be recognised as a valuable resource, not a problem that needs to be dumped.  Many waste water facilities are being renamed as water reclamation facilities, and whether the waste water is being discharged into a river, being used to irrigate ...


    By atg UV Technology

  • Manufacturer of Water Treatment Chemicals and Water Additives

    Water treatment is a process for treating sewage or modern wastewater and converting it into more acceptable form for a specific end-use. The end utilization of this treated water might be drinking, mechanical water supply, water system, waterway stream support, water diversion or numerous different uses, including being securely returned to nature. Water treatment expels ...


    By Water Chemicals

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