| 第 52 卷第 3 期 |  | Vol. 52 No. 3 | | 2022 年 6 月 | Jun 2022 |
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所屬欄目：安全與環(huán)保
雙堿軟化和電催化氧化處理頁(yè)巖氣采出水研究 |
| 李 明，唐益洲
（廣東海瑞環(huán)�？萍加邢薰�，廣東 東莞 523808） |
| 摘 要：針對頁(yè)巖氣采出水水質(zhì)特點(diǎn)，對其進(jìn)行了雙堿軟化和電催化氧化工藝處理研究，對比了堿一Ca（OH）2和NaOH的軟化效果，同時(shí)考察了堿二NaCO3投加量、電催化氧化pH、電流密度、極板間距等關(guān)鍵參數對處理效果的影響。結果表明，NaOH的軟化效果明顯優(yōu)于Ca（OH）2，當pH為11.0，Na2CO3投加量2000 mg/L，經(jīng)雙堿軟化處理后，CODCr從757.68 mg/L降至478.14 mg/L，去除率為36.89%，硬度從2400 mg/L降至110 mg/L。電催化氧化的優(yōu)化參數為：pH為8、電流密度15 mA/cm2、極板間距2 cm，反應30 min，出水CODCr為25.16 mg/L，去除率達94.74%，反應過(guò)程電流效率和能耗分別為79.94%和15.92 kW·h/kgCODCr。最終出水水質(zhì)優(yōu)于《城鎮污水處理廠(chǎng)污染物排放標準》（GB 18918—2002）一級A排放標準。 |
| 關(guān)鍵詞：頁(yè)巖氣采出水；硬度；化學(xué)需氧量；雙堿軟化；電催化氧化 |
| 中圖分類(lèi)號：X7 文獻標識碼：A 文章編號：1009-9212（2022）03-0041-05 |
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| Study on the Treatment of Water from Shale Gas Production by Double Alkali Softening and Electrocatalytic Oxidation |
| LI Ming, TANG Yi-zhou
(Guangdong Hai Rui Environmental Protection Technology Co., Ltd., Dongguan 523808, China) |
| Abstract：According to the characteristics of water from shale gas production, a combined process of double alkali softening and electrocatalytic oxidation was used to treat this wastewater. The softening effects of Ca(OH)2 and NaOH were compared, the effects of NaCO3 dosage, pH of electrocatalytic oxidation, current density and electrode distance were also investigated. The results showed that the softening effect of NaOH was obviously better than that of Ca(OH)2, and the suitable parameter was to adjust the pH of 11.0, the optimum dosage of Na2CO3 was 2000 mg/L, after double alkali softening treatment, the CODCr decreased from 757.68 mg/L to 478.14 mg/L, the removal rate was 36.89%, and the hardness also decreased from 2400 mg/L to 110 mg/L. The optimal parameters of electrocatalytic oxidation were as the followings: constant pH was 8; current density was 15 mA/cm2 and electrode distance was 2 cm. Under the above conditions, after 30 minutes, the effluent CODCr was 25.16 mg/L, the removal rate reached 94.74%，the current efficiency and energy consumption of the reaction process were 79.94% and 15.92 kW·h/kg CODCr，respectively. The final effluent quality was better than the first A standard of “Discharge standard of pollutants for municipal wastewater treatment plant” (GB 18918—2002)． |
| Key words：shale gas produced water; hardness; CODCr; double alkali softening; electrocatalytic oxidation |
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作者簡(jiǎn)介：李 明（1987—），男，湖南常德人，工程師，博士，研究方向：廢水處理與水資源循環(huán)利用技術(shù)（E-mail：lm6313@163.com）。
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收稿日期：2022-03-11
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