工業區污水處理廠污泥資源化之研究－燒結製磚

Utilitation of Sludge Generated from Wastewater Treatment Plant in Industrial Park－Sintered Brick

鄭淑芬(Shu-Fen Cheng)

指導教授 ： 章裕民

國立臺北科技大學/工程學院/環境工程與管理研究所/碩士(2008年)

摘要

本研究以南部某工業區污水處理廠污泥及經磚窯廠隧道窯焚化後之污泥灰作為燒結製磚之原物料，並利用南部某既設之紅磚製品工廠製程進行燒結資源化試驗，其成形壓力、燒結溫度及燒結時間等操作條件皆已固定，故主要探討原物料組成含量變化對紅磚性質（燒失量、體積收縮、吸水率、抗壓強度、重金屬溶出、重金屬含量、SEM及XRD等）之影響。
實驗過程中以紅磚製品工廠使用之黏土為主原料，工業區污水處理廠污泥為副原料，其取代黏土之比例介於0〜20％，並以5％為增量變化；而另一實驗係以工業區污水處理廠污泥經磚窯廠隧道窯焚化前處理後所得之污泥灰作為燒結副原料，其主原料、污泥灰摻配比例及增量變化之控制皆與污泥燒結製磚實驗相同。
經實驗結果顯示：以工業區污水處理廠污泥與黏土燒結所製得之紅磚，隨著污泥摻配比例之增加，抗壓強度有下降趨勢，吸水率則相反，而紅磚之抗壓強度均可符合普通磚國家標準之一種磚規範；吸水率則可符合三種磚規範，其中添加5%及10%污泥所燒製之紅磚吸水率更是可達二種磚之標準。綜合考量紅磚之吸水率、抗壓強度及重金屬溶出量，在摻配10%污泥與黏土進行燒結，可得到低吸水率高抗壓強度之紅磚，且重金屬溶出可符合法規標準。
以工業區污水處理廠污泥灰與黏土燒結所製得之紅磚，隨著污泥灰摻配比例之增加，抗壓強度與吸水率皆有上升之趨勢，其中紅磚抗壓強度可符合普通磚國家標準之一種磚規範；吸水率則可符合三種磚規範，惟已接近三種磚規範之上限值，因此未來以工業區污水處理廠污泥灰燒結製磚應特別留意。綜合考量紅磚之吸水率、抗壓強度及重金屬溶出量，在摻配15%污泥灰與黏土進行燒結可得到低吸水率高抗壓強度之紅磚，且重金屬溶出亦可符合法規標準。

關鍵字

工業區污水處理廠 ； 污泥 ； 燒結 ； 抗壓強度 ； 吸水率 ； 紅磚 ； 隧道窯

並列摘要

The raw materials used for brick sintering for this research came from sludge of wastewater treatment plant in industrial park in southern Taiwan. The sludge was incinerated with ash in a tunnel kiln of brick factory. The operation variables include molding pressure, sintering temperature and time were fixed. This research will then focus on the influence of raw material content change on the properties (including loss on ignition, volumes shrinkage, water adsorption, compressive strength, heavy metal TCLP, content of heavy metal, SEM and XRD) of bricks.
The primary raw materials used for both experiments are clay applied in brick factory. The auxilary raw materials for each experiment are sludge of wastewater treatment plant in industrial park, and the sludge ash after incineration. The substitution rate of clay is from 0 ~ 20%. And the change of substitution rate is 5%.
According to the experiment results, the compressive strength of brick sintered from mixture of sludge and clay will decrease with the increase of sustitution rate, but the water adsorption will increase. The compressive strength of sludge brick can meet the CNS standard of first class bricks of common bricks. The water adsorption can meet the CNS standard of third class bricks of common bricks. Especially, with the substitution of 5% and 10% sludge in bricks, the water adsorption can meet the CNS standard of second class bricks of common bricks. With the overall consideration of water adsorption, compressive strength and heavy metal TCLP, the 10 % sludge added brick has lower water adsorption, higher compressive strength, and meets the regulation of heavy metal TCLP.
The compressive strength and water adsorption of brick sintered from mixture of sludge ash and clay increase a little with the increase of sludge ash sustitution rate. The compressive strength of sludge ash brick can meet the CNS standard of first class bricks of common bricks. The water adsorption can meet the CNS standard of third class bricks of common bricks but almost reach the upper limit. It is recommended to pay more attention to sludge ash brick. With the overall consideration of water adsorption, compressive strength and heavy metal TCLP, the 15 % sludge ash added brick has lower water adsorption, higher compressive strength, and meets the regulation of heavy metal TCLP.

並列關鍵字

wastewater treatment plant in industrial park ； sludge ； sintering ； compressive strength ； water adsorption ； brick ； tunnel kiln

參考文獻

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