以薄膜蒸餾法處理含鉻廢水之研究

TREATMENT OF CHROMIUM FROM WASTEWATER BY AIR GAP MEMBRANE DISTILLATION

游芮雅(Aulia Nur Febrianti)

指導教授 ： 游勝傑

共同指導教授 ： 王雅玢(Wang Ya-Fen)

中原大學/工學院/環境工程學系/碩士(2021年)

https://doi.org/10.6840/cycu202100826

摘要

鉻金屬是工業廢水中主要的污染物之一，其不僅對環境有害，亦對我們人體的健康以及安全帶來危害。鉻金屬在吸入或於局部應用具有強烈的毒性，會導致肺炎、對鼻子帶來刺激性、鼻潰瘍以及過敏反應等，如接觸性皮膚炎以及哮喘。環保署規定水體中鉻金屬的標準值是 0.05 毫克/升，而工業廢水檢測到的鉻金屬濃度可能高於 19000 毫克/升。本研究應用空間隙式薄膜蒸餾系統(Air Gap Membrane Distillation, AGMD)技術進行實驗，並利用實驗設計法，找尋去除工業廢水中鉻金屬的最佳
操作參數。研究使用之薄膜孔徑大小為 0.2µm，並以 Plackett-Burman 設計法以及反應曲面法（Response surface methodology, RSM）進行實驗設計，結果顯示，影響去除鉻金屬效率的主要因子為廢水中的鉻金屬濃度和氯化物濃度。此外，研究結果顯示，AGMD在實際工業廢水中測試的最佳參數為進料流量4 L/min，冷卻水流量 2 L/min 以及進料溫度 70℃，可達到鉻金屬的去除率 98%以上，且產水通量達 12kg/m2-h。

關鍵字

間隙式薄膜蒸 ； 鉻金屬去除 ； 水回收 ； 滲透通量 ； 工業廢水

並列摘要

Chromium is one of the pollutant contaminations in industrial wastewater. It generally known as heavy metal that can be harsh for the health and safety of environment. Chromium is extremely toxic when inhaled or applied topically, causing lung cancer, nasal irritation, nasal ulcers, and hypersensitivity reactions such as contact dermatitis and asthma. The EPA rules limited amount that allowed for chromium in waterbody is 0.05 mg/L. The industrial wastewater detected chromium concentration approximately more than 19000 mg/L.
This study purpose to find the optimum parameter of air gap membrane distillation in chromium removal from industrial wastewater. The membrane distillation used membrane which has pore size 0.2 µm. The experiment arranges by design of experiment statistical method Placket Burman and Response surface model.
Based on the statistical design of experiment results that the main effect in this research are chromium concentration and chloride concentration. It represents as P Value of chromium concentration and chloride concentration which less than 0.05.
The main effect of removal chromium is chromium concentration and chloride concentration. The removal efficiency of chromium removal achieved to more than 98% and the permeate flux of the water product is up to 12 kg/m2-h. Furthermore, the optimum parameter for Air Gap Membrane Distillation (AGMD) application in real industrial wastewater is feed flowrate 4 L/min, cooling water flowrate 2 L/min, feed temperature 70ºC.

並列關鍵字

Air Gap Membrane Distillation ； Chromium removal ； Industrial wastewater ； Water recovery ； Permeate flux

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