CAJ | 학술논문

马铃薯淀粉废水产生的季节性使得常规生物处理应用起来存在很大困难,采用絮凝剂对废水进行预处理可减轻后续处理负担.文章使用常规化学絮凝剂AlCl_3、Fe_2(SO_4)_3、PAM以及有机和无机之间的相互复配对马铃薯淀粉废水进行絮凝预处理,研究了投药量:废水pH值、助凝剂CaCl2投加量以及沉降时间等因素对絮凝效果的影响,确定了各絮凝剂处理废水的较佳絮凝条件,并在较佳条件下处理废水,通过综合比较处理效率、处理成本、絮凝条件难易程度等方面,确定了马铃薯淀粉废水的较佳絮凝剂为AlCl_3+PAM,其具有废水处理效果好(COD去除率为41.08%,浊度去除率为95.06%,色度去除率为90.63%)、投药量少(2mL AlCl_3+0.3mL PAM)、助凝剂投加量少(1mL CaCl_2)、较佳pH在废水初始pH范围内、处理成本低(11.05元/t废水)、产生污泥量少(649g/t废水)等优点.
마령서정분폐수산생적계절성사득상규생물처리응용기래존재흔대곤난,채용서응제대폐수진행예처리가감경후속처리부담.문장사용상규화학서응제AlCl_3、Fe_2(SO_4)_3、PAM이급유궤화무궤지간적상호복배대마령서정분폐수진행서응예처리,연구료투약량:폐수pH치、조응제CaCl2투가량이급침강시간등인소대서응효과적영향,학정료각서응제처리폐수적교가서응조건,병재교가조건하처리폐수,통과종합비교처리효솔、처리성본、서응조건난역정도등방면,학정료마령서정분폐수적교가서응제위AlCl_3+PAM,기구유폐수처리효과호(COD거제솔위41.08%,탁도거제솔위95.06%,색도거제솔위90.63%)、투약량소(2mL AlCl_3+0.3mL PAM)、조응제투가량소(1mL CaCl_2)、교가pH재폐수초시pH범위내、처리성본저(11.05원/t폐수)、산생오니량소(649g/t폐수)등우점.
Seasonal production of potato starch wastewater makes difficult application of conventional biological treat-ment. The flocculants can be used to wastewater pretreatment to alleviate the burden of later treatment. Conventional chemical flocculants including AlCl_3, Fe_2(SO_4)_3, PAM and remixed between organic and inorganic ones were used to treat potato starch wastewater. Influence of dosage of flocculants, pH, dosage of coagulant aid CaCl_2 and sedimentation time to flocculation efficiency was studied, and the optimum flocculation conditions were determined. Flocculants of AICl_3 +PAM which has a better treatment efficiency with COD removal rate of 41.08%, turbidity removal rote of 95.06% and chroma removal rate of 90.63% with lower dosage of flocculants and CaCl_2 as well as lower cost of 11.05yuan per ton wastewater and sludge of 649g per ton wastewater was determined as the best flocculation treatment conditions according to compari-son of treatment efficiency, cost and flocculation conditions.