-Outline of the Kobe City Higashinada Sewage Treatment Plant-

広告 (広告募集について)



The Higashinada Sewage Treatment Plant received major damage in the January 1995 Great Hanshin-Awaji Earthquake. Currently, in addition to being successfully reconstructed, it also has received attention from both within Japan and around the world for its ability to produce renewable energy. In 2012, the Higashinada Plant was designated by the Japanese government as a “Water and Environment Solution Hub”. The facility now acts as an information distribution hub, and has the role of disseminating information at home and abroad related to the experiences accumulated by Kobe during the earthquake and recovery.

・運転開始 1962年
・排除方式 分流式(一部、合流式)
・処理人口 約38万人
・処理区域 35km2
・処理能力 241,500m3/日
・処理方式 標準活性汚泥法
・汚泥処理 濃縮、消化、脱水

【Outline of Higashinada Sewage Treatment Plant】
・Began operation in 1962
・Elimination method: Separate sewer system (some portions utilize combined sewer system)
・Population served: Approximately 380,000 people
・Treatment area: 35km2
・Treatment ability: 241,500 m3/day
・Treatment method: Standard activated sludge method
・Sludge treatment: Concentration, digestion, dewatering

阪神・淡路大震災による被害と復旧-Damage and Recovery from the Great Hanshin-Awaji Earthquake-


The Higashinada Sewage Treatment Plant received large-scale damage due to the destruction of reclamation revetments in the quake. In particular, the plant was forced to suspend operation for around 100 days due to the fact that its water processing facilities were submerged in water. During that period, a variety of measures were taken, including temporarily using the canal that intersects the plant as a settling tank. Afterward, the city focused its attention on the recovery of the facilities, and reconstruction was completed at the end of fiscal year 1998.

こうべバイオガス事業-Kobe Biogas Project-


After concentrating the sludge generated by the water treatment process, the concentrated sludge undergoes an anaerobic digestion process for the purposes of volume reduction and stabilization. The digestive gas (composition: approx. 60% methane, approx. 40% carbon dioxide) is then refined to a concentration of 98% methane. Since April of 2008, this gas has been used as an automotive fuel under the name “Kobe Biogas”. Since October of 2010, the gas has been further refined and began to be injected into the city’s gas pipes. Both of these efforts are the first of their kind in Japan.

KOBE グリーン・スイーツプロジェクト-Kobe Green Sweets Project-


Since January of 2012, Kobe has been adding unused local biomass (food waste, ligneous waste) to sewage sludge in an effort to increase the amount of gas produced and improve the effectiveness of sludge processing. These efforts have been undertaken as an innovative technology verification project in sewage systems designated by the Japanese Ministry of Land, Infrastructure, and Transport. Kobe plans to contribute to the creation of a low carbon and recycling-oriented society through efforts like these that are models for the local production and consumption of renewable energy.

KOBEハーベスト(大収穫)プロジェクト-Kobe Harvest Project-


The city will aim for more effective usage of resources by beginning a digestive sludge phosphorus recovery verification project in January 2013.

市民に開かれた処理場を目指して-Aiming for a Treatment Plant Open to Citizens-


Portions of the restored revetments have been redesigned as a walking trail open to citizens. The city had around 70 almond trees planted along the trail, and every year when the almond blossoms are in full bloom around the end of March, the city holds the “Almond Tree and Spring Music Festival” event in partnership with local residents. Around 10,000 people come to the event in one day.