水质污染

The discharges from separate storm sewer systems in the dry weather do great harm to receiving water in Shanghai.

分流制雨水系统旱流放江严重污染了上海市河道水质。

The location of the subdistrict is favorable and special. In order to protect the water source and tourism resources in the scenic spots, Beizhai had to abandon many opportunities to develop and many industries were restricted for that for a long time.

长期以来，为保护生活饮用水源地的水质不受污染，保护风景名胜区不可再生的自然资源，北宅各方面发展受到极大的限制，放弃了很多发展机会，导致经济发展严重落后于周边区、市。

The product can be used safely since the product itself is nonpoisonous and nonchemically polluted at the same time. 2.the septic tank maintainer can easily biodegrade waste materials, albumin, starch, oils, and fats. the product can eliminate 90% of the odor, decrease polluted materials, surrounding files, and improve the quality of water and environment.

当加入化粪池中以后，在压氧情况下的微生物分解能力大大提升分解排泄物中所含蛋白质淀粉油脂，可清除恶臭味达90%，减少污染泥累积延长抽水肥时间改善排放水质，减少周边的蚊蝇蟑螂等，改善环境卫生。

According to results of investigation on water quality and pollutant source and research with concerned document in Xiamen Tongan Bay,COD was taken as index of organic pollutant; a model of carrying capacity based budget was established.

根据同安湾水质、污染源调查数据及相关研究结果，以COD为污染因子，建立收支养殖容量模型，并从同安湾污染物容纳量的角度对同安湾的牡蛎养殖容量进行综合估算。

The emergence of tubifex in the raw water is a new problem in drinking water treatment.It is easy for tubifex to get through the filter bed and reach the water tank.

水源污染及水质恶化导致水体中生物群结构发生改变，部分水生物大量繁殖，由于目前不能被有效去除，致使在水厂乃至入户水中时有出现，这是给水处理中出现的一个新问题。

The leachate has high concentration of the pollutants and great changes in quality and quantity, which can pollute the surrounding environment. So it's necessary to make the leachate unharmful.

垃圾渗滤液污染物浓度高，水质水量变化大，会对周围环境造成严重污染，因此对渗滤液的处理显得十分重要。

The country used to suffer much from epidemic diseases, which ere largely caused by the wretchedly bad water which the natives obtained from stagnant pools and contaminated streams.

这个地方曾经为流行性的疾病所苦，其主要原因乃是当地居民从停滞的水池和污染的河川中，摄取恶劣的水质所致。

Although the range of all metals studied in water samples did not exceed the National Water Quality Standard for Fisheries (GB 11607－89), relatively obvious contamination of Pb, and in particular Zn and As were found by the range in the samples of sediments and Anodonta woodiana.

虽然水样中各重金属均未超过国家渔业水质标准（GB1160789），但底泥和背角无齿蚌的结果显示出Pb，特别是Zn、As的污染比较明显。

The treatment enclosures with E.crassipes and S.natans had the better effect on sewage purification and nutrients removal.It may relate to their ability of absorption and assi milationthe nitrogen and phosphorus fromsewages as well as the action of microorganismaround plant root.

凤眼莲和槐叶萍处理围区的水质净化效果较好，这与植物自身吸收同化污染水体中氮素、磷素的能力大小及植物根系微生物的作用都有关。

City rivers are severely polluted. Raw water maintains high quality besauce of long-distance water transfer and water intake position shift. Part of water suppy comes from underground water.

城市河道受到比较严重的污染，但由于采取了远距离调水、取水口迁移等措施，城市供水的原水水质得到了较好的保证。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。