瓶装糟烧酒沉淀原因及处理

糟烧酒，香又醇，历来深受消费者欢迎，近年来，包装上已逐步从坛装转为瓶装，包装上了档次，价格上扬，但它并非简单将散装酒灌入瓶中就了事，实质上是给酒的稳定性提出了更高技术要求，坛装酒有酒脚等消费者看不见，但换了瓶装酒，酒一旦产生混浊或沉淀，消费者就不愿接...

选购农药“四看”法

一看出厂日期。一般有机磷类农药,有效期为2年,粉剂3年以上,水剂1年左右。农友在购买农药时,要问清农药的出厂日期,在有效期内才能购买,切忌购买过期失效的农药。二看结块状况。不失效的粉剂农药,一般呈粉状,不结块。失效粉剂农药,多结块成果粒状或大团块。三看乳化程度。水剂农药可取数滴放入水中,搅拌均匀,如果立即呈乳色,无结絮又无沉淀,表明乳化较稳定,该药有效;如果变为其它颜色,结絮漂浮、沉淀,说明该药已过期失效。

Coagulation-flocculation process for combined sewage in Shanghai

The effects of the coagulation-flocculation process using polyaluminium chloride (PAC) and its aids on the removal of organics and nutrient in the combined sewage from Shanghai Zhuyuan First Municipal Wastewater Treatment Plant are studied. The coagulant aids include cationic polyacrylamide (PAM), polyvinyl alcohol (PVA), activated silica (AS) and a kind of polyelectrolyte called AN prepared by the authors. The coagulating solution was added to the glass jar holding 1 L wastewater and stirred to a uniform mixture which was stilled to let the supernatant turn out. The supernatant was analyzed to see the removal efficiencies of suspended solid (SS), chemical oxygen demand (COD), soluble chemical oxygen demand (S-COD), total phosphorus (TP) and orthophosphate (PO4 -P). It is found that PAC is efficient in reducing those five matters, PAM, PVA and 3? AN each faciliates the reduction of TP, SS, COD and S-COD and has little contribution to the removal of ammonia nitrigen and orthophosphate, and AS is noneffective at all. The coagulation-flocculation process with PAC has demonstrated applicable to the treatment of combined sewage in Shanghai, and it involves mainly the sweep coagulation mechanism and maybe some more complicated mechanism as well.

谈谈锥形不锈钢高位箱的使用

高位箱是浆料输送过程中的重要装置,对稳定浆料的速度,控制浆料的流量起着关键的作用。 今年我厂对2＃、5＃、6＃系统进行了全面改造,由原来的长网双缸纸机改为长网六缸纸机,增加表面施胶及压光装置,生产高级书写纸,并对浆料的净化及输送系统进行了大规模的改造,淘汰了整个流程中的铁质管道,全部改为不锈钢管道、不锈钢除砂器、不锈钢高位箱。

鉴别失效农药的几种方法

一、观察法 粉刺或可湿性粉剂,如果外表显现受潮性特征,药粉呈团结块,或压一压表现湿气重甚至结块者,药效已丧失。液剂如静置浑浊不清或有絮结沉淀,这说明已失效变质。乳剂如静置后出现油水分层,或发生絮结及沉淀,也是失效变质的表现。 二、悬浮法 对可湿性粉剂,可取药50毫升,倒入瓶中,加少量水调成糊状,再加清水搅拌均匀。