摘要:
Due to high TP of bean-processing wastewater, the traditional calcium method for removing phosphorus was improved. Effect of adding amount and ratio of different calcium ion reagents on phosphorus content and pH value of treated wastewater was investigated. In modified calcium method (using Ca(OH)2and CaCO3together), by changing the ratio of two calcium ion reagents, the process parameters that can make the pH value of treated wastewater meet the emission requirement and improve the settling performance were determined as follows: for bean-processing wastewater with 51.21 mg/L TP and initial pH =6.5, 0.5 mL Ca(OH)2solution with concentration of 5% was added, the reaction time was 10 min, and then 2.5 mL saturated solution of CaCO3was added, the reaction time was also 10 min, finally mixed flocculant was added, the phosphorus removal rate after static settlement reached 99.01%, the final pH was 8.43.%針對(duì)豆制品廢水磷含量高的特點(diǎn),提出對(duì)傳統(tǒng)鈣法的改良.實(shí)驗(yàn)探討了不同含鈣離子試劑的投加量和投加比,對(duì)處理出水磷含量和pH值的影響.改良鈣法(即聯(lián)合Ca(OH)2和CaCO3),通過(guò)控制兩種試劑的投加比等試驗(yàn)找到使得豆制品廢水的出水 pH 值在允許的排放范圍內(nèi)、改善沉降性能的工藝參數(shù):在 pH 值為6.5且磷度為15.21 mg/L的豆制品廢水情況下,投加0.5 mL 濃度為5%石灰溶液投,反應(yīng)10 min后,再投加2.5 mL 飽和碳酸鈣溶液,反應(yīng)10 min.添加混絮凝劑,靜置沉淀后上清液的磷去除率可達(dá)99.01%,此時(shí)出水pH值為8.43,符合排放標(biāo)準(zhǔn).
摘要:
以蛋白質(zhì)回收率、總糖透過(guò)率、異黃酮透過(guò)率和超濾膜通量為評(píng)價(jià)指標(biāo),采用絮凝-超濾聯(lián)用的技術(shù)初步分離廢水中的蛋白質(zhì)、低聚糖和異黃酮.最佳試驗(yàn)條件為用0.3 mg/mL殼聚糖對(duì)廢水進(jìn)行絮凝處理,并用10 kDa的聚醚砜膜進(jìn)行超濾處理.蛋白質(zhì)回收率達(dá)到76.1%,總糖透過(guò)率達(dá)到76.0%,異黃酮透過(guò)率達(dá)到77.2%,平均膜通量18.9~20.0 L/(m2·h).絮凝-超濾后蛋白質(zhì)含量為50.7%.%With protein recovery rate, total sugar transmission rate, soybean isoflavone transmission rate and ultrafiltration membrane flux as evaluation indexes, flocculation and ultrafi ltration were preliminarily used to separate protein, oligosaccharides and isofl avone in bean products wastewater. The optimum conditions were as follows: 0.3 mg/mL chitosan was used in flocculation, while 10 kDa polyether sulfone membrane was used in ultrafiltration. Protein recovery rate reached 76.1%, total sugar transmission rate reached 76.0%, soybean isoflavone transmission rate reached 77.2%, and the average fl ux was 18.9-20.0 L/(m2·h). The purity of the protein after fl occulation and ultrafi ltration was 50.7%.