NUTRIENT SALTS CONTROL SYSTEM FOR TREATED EFFLUENT

• Main Authors: YAMANOI ICHIRO, SANNOMIYA YUTAKA, NISHIDA YOSHIKI, SUMIKURA MISAKI, KAGEYAMA KOJI, ENBUTSU ICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2024
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide a system for controlling nutrient salts in treated effluent that incorporates a method/process to contribute to increased blue carbon content.SOLUTION: A system includes a wastewater treatment facility that prepares treated wastewater, a concentrated seawater supply facility that prepares concentrated seawater, a mixing mechanism that mixes the treated wastewater and the concentrated seawater to prepare the treated effluent, an operation control device that controls the operation of the wastewater treatment facility and the mixing mechanism, and a controlled water area monitoring device that observes predetermined control items in the controlled water area where the treated effluent flows. The operation control device has a mechanism for acquiring information on the controlled water area to obtain the observation results of the prescribed control items, a mechanism for calculating the discharge concentration of nutrient salts contained in the treated effluent using the observation results of the prescribed control items, and a nutrient salts controlling mechanism that sets a target value for the concentration of nutrient salts in the treated wastewater based on the recommended value for discharge, information on the water quality of the treated wastewater, and information on the water quality of the concentrated seawater.SELECTED DRAWING: Figure 1 【課題】ブルーカーボン量の増加に寄与するための方法／プロセスを組み込んだ処理放流水の栄養塩類制御システムを提供する。【解決手段】システムは、排水処理水を用意する排水処理施設と、濃縮海水を用意する濃縮海水供給施設と、前記排水処理水と前記濃縮海水とを混合して前記処理放流水を用意する混合機構と、前記排水処理施設および前記混合機構の運転を制御する運転制御装置と、前記処理放流水が流達する管理水域において所定の管理項目を観測する管理水域モニター装置と、を有し、運転制御装置は、所定の管理項目の観測結果を取得する管理水域情報取得機構と、所定の管理項目の観測結果を用いて処理放流水に含まれる栄養塩類の放流推奨値を算出する放流濃度算出機構と、放流推奨値、排水処理水の水質情報および濃縮海水の水質情報に基づいて、排水処理水の栄養塩類の濃度の目標値を設定する栄養塩類制御機構と、を有する。【選択図】図１