• Korean Architects
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• no.5 s.33
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• pp.21-27
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• 1971

• Bulletin of Korea Environmental Preservation Association
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• v.7 no.19
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• pp.68-73
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• 1985

• The Science & Technology
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• v.34 no.8 s.387
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• pp.69-71
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• 2001

• KSCE Journal of Civil and Environmental Engineering Research
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• v.2 no.1
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• pp.69-80
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• 1982

This study was performed to increase the treatment efficiency of the existing anaerobic digestion facilities of the nightsoil treatment plants. Bench-scale anaerobic digesters were operated to evaluate the effect of the ratio (7:3 and 9:1) of the mixture of nightsoil and septic tank sludge on treatment efficiency. The laboratory experiments have demonstrated that the ratio of the mixture does have an effect on the organic removal efficiency. The nightsoil to septage ratio of 7 to 3 appears to yield a higher efficiency than the ratio of 9 to 1. The percent removals of 7 to 3 ratio are 87 % BOD, 82 % COD, 66 % TS, and 78 %. VS whereas those of 9 to 1 ratio are 80 % BOD, 80 % COD, 63 % TS, and 76 % VS. This study also showed that the mixed treatment of the nightsoil and septic tank sludge will be possible at the nightsoil treatment plant.

• Journal of the Korea Organic Resources Recycling Association
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• v.15 no.4
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• pp.138-146
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• 2007

There are still lots of areas where are covered with combined sewer pipes in Seoul. All buildings within those areas are equipping septic tanks which take part in separating solids from flushing water of chamber pots. Septic tanks legally demand emptying and cleaning the those inner bodies, resulting the generation of sludge which should be purified using the specified treatment plants, as one of environmental infrastructures. Scale of treatment plants for septic tank sludge are affected by sludge volume generated from cleaning, which give emphasis to adequate estimation of sludge volume in the future. This study aimed to define prediction tools for sludge volume. Among various parameters, floor area of building is most reasonable one to estimate the quantity of cleaning sludge, showing increasing gradually up to 13,149kL a day in 2020. Using same parameter also are able to assess the amount of BOD in the cleaning sludge.

• Korean Architects
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• no.4 s.169
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• pp.97-114
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• 1983

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.3 no.1
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• pp.10-12
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• 1974

• Journal of the Korea Organic Resources Recycling Association
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• v.30 no.4
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• pp.123-130
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• 2022

This study was conducted to prepare a plan for the operation and improvement of excretory treatment facilities in Seoul, where the amount of excrement is expected to continue to increase due to the increase in the installation of septic tanks, a private sewage treatment facility. As a result, there are problems due to the lack of treatment capacity and increase in the amount brought in. To improve this, it is necessary to expand the overall excretory treatment facility, adjust the area of some facilities, reduce the amount of excrement through the realization of excretory units, and reduce the amount of excrement due to the change of the type of sewage treatment facility.

• Korean Architects
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• no.4 s.32
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• pp.14-23
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• 1971

• The Korea Swine Journal
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• v.14 no.7 s.155
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• pp.112-113
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• 1992