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Sewer surveys and research
In the past, we publish the summary of the survey and research on sewerage that our section (including the former affiliation name) announced so far at the national sewerage research presentation and staff work presentation in the bureau. (Unauthorized reproduction and secondary use of the published abstracts are prohibited.)
Last Updated March 19, 2024
FY2023 Survey and Research
- Reduction of Bloy power consumption and impact on public water bodies in Seibu Wastewater Treatment Plant (PDF: 320KB)
- 60-year history of treated water quality in Chubu Wastewater Treatment Plant, Yokohama (PDF: 969KB)
- Efforts to Reduce Greenhouse Gas Emissions in Kohoku Wastewater Treatment Plant (PDF: 1,762KB)
- Implementation of nitrification suppression operation referring to nutritional salt management operation (PDF: 1,259KB)
- Research and development of activated sludge diagnosis technology utilizing AI and image processing (PDF: 3,521KB)
- Investigation into efficient measuring method for microplastics with particle sizes of 300μm or more in the wastewater treatment plant（PDF：1,352KB）
FY2022 Survey and Research
- About human resource development of the staff responsible for water quality management of sewage treatment in Yokohama-shi (PDF: 481KB)
- Changes in sewage treatment capacity at the time of seawater infiltration (PDF: 457KB)
- Examination method of measurement method of Escherichia coli number in sewage and time zone change investigation (PDF: 1,052KB)
- Optimization of burn processing in cooperation with Sakaigawa water system 3 centers (PDF: 915KB)
- Reduction of air flow using ammonia control and impact study on public water bodies (PDF: 1,560KB)
FY2021 Survey and Research
FY2020 Survey and Research
- Changes in water treatment status following the start of network water transmission in Kanagawa Wastewater Treatment Plant (PDF: 583KB)
- Comparison of trends in phosphorus concentration of sludge at the North-South Sludge Recycling Center (PDF: 729KB)
- About grasp of the actual situation of Escherichia coli number in sewage (PDF: 335KB)
- Examination of microplastic measurement methods using microscopic FT-IR (PDF: 415KB)
FY2019 Survey and Research
- Balance between water treatment and energy saving using ammonia meter (PDF: 388KB)
- Examination of pretreatment methods for microplastic measurement (PDF: 380KB)
- Operation management to promote nitrogen removal at Sakae Daiichi Water Reclamation Center (PDF: 364KB)
- Survey of inflow water quality on the Kanazawa Wastewater Treatment Plant Seaside Trunk Line (PDF: 592KB)
- Examination for microplastic measurement in sewage using micro FT-IR (PDF: 444KB)
- Consideration of the effects of NW test water transmission between Kanagawa and Kitani and stable phosphorus treatment (PDF: 514KB)
- Survey of nonylphenols at the Water Reclamation Center (PDF: 398KB)
FY2018 Survey and Research
- Mercury behavior at the Water Reclamation Center adjacent to the Sludge Recycling Center (PDF: 546KB)
- Consideration of the pseudo-AO method operation in Chubu Wastewater Treatment Plant, Yokohama (PDF: 464KB)
- Survey of pharmaceuticals such as antibiotics at the Water Reclamation Center (PDF: 516KB)
- About improvement of water quality knowledge base (PDF: 366KB)
- Energy saving effect and impact on treated water quality by controlling the amount of air blower operation focusing on the number of blowers operated (PDF: 291KB)
- Stabilization of water treatment and energy saving by reviewing the distribution of water to each series in Tsuzuki Wastewater Treatment Plant (PDF: 431KB)
- Improvement of treated water quality in Tsuzuki Wastewater Treatment Plant and its impact on Tsurumi River water quality (PDF: 200KB)
- Example of elimination of nitrite nitrification in Nambu Wastewater Treatment Plant (PDF: 290KB)
FY2017 Survey and Research
- Effective public information (PDF: 554KB) by "walking map around water reclamation center"
- Examining the quantitative management method for the final sedimentation pond (PDF: 417KB)
- Survey of chemical substances used in pharmaceuticals at the Water Reclamation Center (PDF: 736KB)
- Examination of pretreatment methods to obtain a stable recovery rate in arsenic and selenium analysis (PDF: 306KB)
- About human resource development plan development in section and approach of technology succession (PDF: 181KB)
- Examination of measures to prevent the deterioration of phosphorus removal in the pseudo-AO method (PDF: 367KB)
- First, a basic study of sewage treatment methods by adding coagulants in sedimentation pond (PDF: 246KB)
- Status of Kanagawa Wastewater Treatment Plant Advanced Processing System 1 (PDF: 413KB)
- About examination of Escherichia coli number measurement method (PDF: 366KB)
- Status and Issues of Nambu Sewerage Center Separation Liquid Treatment Facility (PDF: 518KB)
FY2016 Survey and Research
- About concentration investigation of straight chain alkylbenzenesulfonic acid in sewage and its salt (PDF: 217KB)
- Verification of the effect of sodium hypochlorite in Balking measures (PDF: 451KB)
- PHA behavior survey in the biological phosphorus removal process of advanced treatment facilities (PDF: 513KB)
- Measures against inflow of abnormality in Kanazawa Wastewater Treatment Plant (PDF: 539KB)
- Age change of SVI in the Northern Daiichi Water Reclamation Center (PDF: 332KB)
- Survey of chemical substances used in pharmaceuticals at the Water Reclamation Center (PDF: 561KB)
- Report on the behavior of mercury at the North-South Recycling Center and the adjacent Water Reclamation Center (PDF: 418KB)
- Verification of cases of deterioration of phosphorus removal at each water reclamation center (PDF: 356KB)
- Removal of phosphorus as seen from surplus sludge (PDF: 199KB)
- About maintenance of PAC additive facilities accompanying review of drainage standard added to Water Pollution Control Law (PDF: 333KB)
- Examining the quantitative management method for the final sedimentation pond (PDF: 540KB)
2015 Survey and Research
- Phosphorus concentration estimation method of sludge using simple paint software (PDF: 247KB)
- About processing situation of 1 system advanced processing facility (AO law) (PDF: 402KB)
- Processing adjustment of water reclamation center using ion chromatograph (PDF: 381KB)
- Behavior survey of nonylphenol-related substances in sewage treatment (PDF: 352KB)
- Verification of the effect of sodium hypochlorite in Balking measures (PDF: 510KB)
- Investigation of the actual status of the activated sludge temporary storage substance PHA and its behavior in activated sludge treatment (PDF: 442KB)
- Verification of processing status by introduction of pseudoanaerobic aerobic method (PDF: 471KB)
- PHA behavior survey at advanced treatment facilities (PDF: 484KB)
- About new approach of public information event for elementary school students (PDF: 328KB)
- Investigation of direct chain alkylbenzenesulfonic acid and its salt at the Water Reclamation Center (PDF: 445KB)
- About water treatment situation after Seya Iida main line water diversion in Seibu Wastewater Treatment Plant (PDF: 351KB)
- Examination of Escherichia coli test method (PDF: 448KB)
- Operation of Tsuzuki Wastewater Treatment Plant Series 5 (PDF: 312KB)
2014 Survey and Research
- About economical phosphorus treatment in Kanazawa Wastewater Treatment Plant (PDF: 382KB)
- About aging of treated water temperature and river water temperature of water reproduction center released into Tsurumi River (PDF: 324KB)
- About processing situation by introduction of pseudoanaerobic aspiration method in Nambu Wastewater Treatment Plant (PDF: 397KB)
- Operation status of Kanazawa Wastewater Treatment Plant Series 1 Advanced Processing Facility (PDF: 328KB)
- Improvement of nitrogen and phosphorus treatment at Nambu Sewerage Center Separation Liquid Treatment Facility (PDF: 488KB)
- Results by Wastewater Quality Control Division's Technology Succession PJ in FY2013 (PDF: 464KB)
- Estimation of the potential phosphorus removal capacity of sludge and its changes (PDF: 388KB)
- To achieve the phosphorus release standard in Hokubu Sewerage Center, Yokohama (PDF: 323KB)
- Efforts to pass on the technology of Yokohama City in water quality management (PDF: 387KB)
Past surveys and research (from 1993)
Research and research themes
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Inquiries to this page
Sewer River Bureau Sewerage Facilities Department Water Quality Section
Telephone: 045-621-4343
Telephone: 045-621-4343
Fax: 045-621-4256
Email address: gk-suishitsu@city.yokohama.lg.jp
Page ID: 804-900-969
