两步厌氧发酵工艺处理浓缩胶乳加工废水的生产性研究

A Study on Treatment of Wastewater from ConcentratedLatex processing in Full scale Using Two-step Anaerobic Svstem

用两步厌氧发酵工艺处理浓缩胶乳加工废水的生产性研究结果表明，这种含有高浓度硫酸盐和氨态氮的酸性废水，在常温条件下，发酵池有机负荷率为１．５７ｋｇＣＯＤ／（ｍ￣３·ｄ），容积产气率达０．６０ｍ￣３／（ｍ￣３·ｄ），ＣＯＤ去除率为７０．３％。每处理１ｍ￣３废水（ＣＯＤ值２５０００ｍｇ／Ｌ）可生产含甲烷６０％以上的沼气８．２ｍ￣３，应用于胶清胶的干燥，可节省干燥所需鱼油的８５～９０％。废水厌氧发酵后经氧化塘进一步好氧处理，出水ＣＯＤ值１６６ｍｇ／Ｌ，ＮＨ＿３－Ｎ ６９ｍｇ／Ｌ，Ｓ￣（２－）３．９ｍｇ／Ｌ。大大减轻了废水对环境的污染，为浓缩胶乳加工废水提供了一种节能的处理方法。

Adopting two steps system of anaerobic fermentation technology to trcat effluent produced in the processingof concentrated latex in full scale indicats that the acid waste contains high content of sulfate and ammonia nitrogen. Atambient temperature the organic loading of the system in the digester is 1.57kg COD/( m￣3.d),the volumetric biogasproduction rate reaches 0. 60m￣3/(m￣3.d)adn the removal rate attains to 70.3%. More than 8.2m￣3 biogas can be obtained attreatment of 1 m￣3 waste water(COD at 25,000mg/L),in which the content of methane in biogas exceed 60%. The biogas isused to dry skim rubber. 85-90%of heavy oil can be saved. After anaerobic fermentation,further treatment are made inaerobic pond,and the COD of the effluent become;166 mg/L,NH_3-N changes into 69 mg/L and S￣(2-) turnS into 3.9mg/L.Through the treatment, the enviromental pollution can be greatly reduced,thus provided an cnergy saving niethod forwastewater disposal in concentracted latex processing factory.