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三唑磷農(nóng)藥廢水處理工藝設(shè)計(jì)
摘 要：三唑磷因?yàn)槠涞投?，高效，廣譜殺菌性而在農(nóng)業(yè)生產(chǎn)中廣泛應(yīng)用，但是在生產(chǎn)過程中，會(huì)產(chǎn)生大量的廢水，這些廢水含有高濃度的有機(jī)物質(zhì)。廢水中含有的農(nóng)藥中間產(chǎn)物化學(xué)性質(zhì)穩(wěn)定，可生化性差，難分解,具有很強(qiáng)的毒性，很高的色度，還會(huì)散發(fā)刺激性氣味。這些都嚴(yán)重的污染了環(huán)境。這種廢水的處理已經(jīng)成為廢水處理工程的瓶頸，一般的方法是將廢水稀釋之后再進(jìn)行生化處理。當(dāng)前已具規(guī)模的處理方法有生化法，吸附法和焚燒法。
采用預(yù)氧化－ClO2催化氧化—SBR法對(duì)農(nóng)藥廢水進(jìn)行處理。在預(yù)氧化過程中，pH為1.38，停留時(shí)間為1h，COD去除率為10%；在催化氧化過程中，pH為6-7，ClO2投加量為1mg/L，停留時(shí)間為1h；最后用SBR生化法進(jìn)行處理，出水達(dá)到《污水綜合排放》（GB 8978-1996）一級(jí)排放標(biāo)準(zhǔn)。
關(guān)鍵詞：三唑磷 催化氧化 SBR生化法 農(nóng)藥廢水
Process Design of Pesticide Triazophos Wastewater Treatment
Abstract：Triazophos is widely used in agriculture because of its low-toxic, high-effective and broad-spectrum, but in the process of its production, large volume of wastewater need to be deal with. The wastewater contain high concentration of organic substance, the stable intermediates are hard to remove and degraded. Their serious toxicity, black color and odorous smell pollute the environment seriously. The treatment of the waste now is a bottleneck in the engineering. The normal method to treat the waste is to dilute it first and then treat it by biodegradation. Now the treatment in industry scale is biodegradation, absorption and burning.
The preoxidation/chlorine dioxide catalytic oxidation/SBR biodegradation process was used to treat the wastewater from production of triazophos. In the preoxidation process, the pH was 1.38 and reaction time was 1 hour, the removal rates of COD was 10%; In the catalytic oxidation, the pH was 6-7, chlorine dioxide dosage 1.0g/L and reaction time is 1 hour; After biodegradation process, the effluent is acceptable to meet the requirement of class I in The national wastewater discharge standard(GB 8978-96).
Key words：Triazophos catalytic oxidation SBR biodegradation pesticide wastewater
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