Purification・・・Sewage treatment Why do'nt any bulking phenomena occur in sewage treatment works with added WK? ・ 　WK functions as a biocatalyst; the activation of effective microorganisms is caused owing to WK's synergetic effect. Activated microorganisms are believed to be related to each other in a food chain similar to those in natural eco-systems. Both water purification and decomposition of organics are accomplished simultaneously. Even though MLSS values are increased a lot in WK-based treatment processes, it should be noted that no bulking phenomenon takes place. ・ 　The increase in MLSS value in WK- based facilities results in an decrease in T-N value. ・ 　There are no adverse effects on existing activated sludge treatment facilities by the addition of WK. In fact, there have been no adverse effects for these 3 years in an activated sludge treatment facility in Japan. ・ 　WK Technology provides both complete prevention of“bulking phenomenon”even under high MLSS conditions and complete decomposition of sludge.　 　1） The 5th Sewage Treatment Works of Kunming City, China 　Landscape of The 5th Sewage Treatment Works of Kunming City 　based on the latest treatment technology from Germany 　Maximum treatment capacity 80,000 ton/day 　Currently, ca. 50,000 ton/day and average amount of dry sludge 60 ton/day generated 　WK addition started on April 9, 2005. 　Regarding water qualities, amount of sluge, 　MLSS, etc., please refer to attached PDF water qualities of The 5th Sewage Treatment Works, Kunming City 　2） Sewage Treatment Facility of the villa gromd, China Reservoir of influent very bad odor Reservoir of influent 20 days after WK addition Odor components decomposed Level of odor 0 Under no addition of WK, amount of excess sludge: 18ton/month → With WK addition, complete decomposition of sludge and no excess sludge Only purified water discharges. Measurements of coliform Influent reservoir 33,000,000/100mL Rotary disk bio-film 180,000/100mL treatment facility Aeration tank Negative/100mL ＊ The reduction of coliform by negative catalysis of WK has been confirmed. 　3） Sewage Treatment Facility of Quanzhou Hotel Time course of purification in a thickening tank (in an existing facility) Before WK addition(Nov. 4, 2004 ) *WK addition starts on Nov. 10, 2004. Situation: Sludge floated unpleasant odor One week after WK addition (Nov. 17, 2004) Situation: Decomposition of sedimentary sludge, Floatation of a lot of sludge,and Odorless 8 weeks after WK addition(Jan. 5, 2005) Situation: Almost completedecomposition of floated　 sludge Note: ・Before WK addition, COD 39.6 and BOD 21.4　in the effluent　After WK addition, reduction of COD　 26.3 and BOD 9.89 in the effluent 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 ・Before WK addition, coliform value 8 in the effluent in the effluent　After addition, coliform not detected in the effluent Results 　　　　　・Definite effect on water purification by the addition of WK 　　　　　　 ・Due to complete decomposition of excess sludge, no need of the disposal cost and the facility construction cost 　　　　　　 ・40 to 50% reduction of electricity (running) cost General estimation: 　　Improvement of water quality and complete decomposition of excess sludge are accomplished, and subsequently reduction of running cost is accomplished. Further additional effects can be expected. 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 　　　　　　　to top ｜home｜technology｜rivers｜sewage｜effluents｜energy saving ｜ Minaki Advance Inc. (Postal Code 731-5124) 12-301, 1-ban, 4-chome, Minaga, Saeki-ku, Hiroshima-city, Japan Note: Any transfer of all contents in the present home page is forbidden.　　　　　　contact us Copyright(c) 2001-2005 Minaki Advance Inc. All Rights Reserved