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摘要
印染廢水在我國工業(yè)廢水總量占有很大比例，而且具有堿性強(qiáng)，色度高，有機(jī)濃度高，生物降解性差等特點(diǎn)，如不治理，必然會(huì)對(duì)受納水體造成嚴(yán)重污染，破壞水體生態(tài)系統(tǒng)。
實(shí)踐證明，對(duì)于印染廢水，物化生化法是一種有效的處理工藝，但常規(guī)處理方法的效率較低，必須對(duì)其進(jìn)行強(qiáng)化。本設(shè)計(jì)要求處理水量為5000 m3/d的印染廢水。通過對(duì)印染廢水排放狀況進(jìn)行研究，根據(jù)印染廢水的特點(diǎn)及在廢水處理中取得的成功經(jīng)驗(yàn)，選擇了工藝成熟、穩(wěn)定、節(jié)能、占地少、效率高的水解酸化—接觸氧化法，使出水水質(zhì)達(dá)到廣東省印染廢水污染物排放標(biāo)準(zhǔn)的要求。
關(guān)鍵詞：印染廢水 水解酸化 接觸氧化 混凝沉淀
Abstract
Dyeing and finishing wastewater is an important part of industry wastewater in our country, which is characterized by high level of alkali, color, organics and poor biodegradability. It will make severe pollution to water system and deteriorate the aquatic ecosystem if discharged into waterbody without treatment.
It has been proved that the physicochemical treatment is one of the feasible methods in treating dyeing and finishing wastewater, but the treatment efficiency of conventional processes are not very high and should be enhanced. This design treated the dyeing and finishing wastewater measured 5000 m3/d. With the study of dyeing and finishing wastewater processes，especially the successful experience of dyeing and finishing wastewater treatment, we select the hydrolytic acidification and biological contact oxidation processes to treat the dyeing and finishing wastewater. This way is proven to be ripe, stead, effective and compact. As a result, the discharged water can meet the emission limits of dyeing and finishing wastewater.
Keywords： dyeing and finishing wastewater hydrolytic acidification contact oxidation coagulation sediment