【摘 要】
：
As water reuse development has increased,biological stability issues associated with reclaimed water have gained attention.This study evaluated assimilable organic carbon (AOC) in effluents from a full-scale membrane biological reactor (MBR) plant and fou
【机 构】
：
Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protec
论文部分内容阅读
As water reuse development has increased,biological stability issues associated with reclaimed water have gained attention.This study evaluated assimilable organic carbon (AOC) in effluents from a full-scale membrane biological reactor (MBR) plant and found that they were generally stable over one year (125-216 μg/L),with slight increases in warmer seasons.After additional tertiary treatments,the largest increases in absolute and specific AOCs were detected during ozonation,followed by coagulation-ozonation and coagulation.Moreover,UV254 absorbance is known to be an effective surrogate to predict the AOC changes during ozonation.Applying coagulation prior to ozonation of MBR effluents for removal of large molecules was found to reduce the AOC formation compared with ozonation treatment alone.Finally,the results revealed that attention should be paid to seasonal variations in influent and organic fraction changes during treatment to enable sustainable water reuse.
其他文献
针对歙县中心城区长期以来保证水位缺乏的实际,基于“2020.7.7”特大暴雨洪水歙县中心城区淹没影响,采用水面线、居住地高程最短距离投影对比的方法,以“分河流评价、短板取值”原则,确定歙县中心城区保证水位为115.50 m.
旬径流受多种因素影响,变化规律复杂,单一的径流预报模型往往不能反映流域来水特点.基于此,提出了一种基于水雨情信息分类的旬径流预报方法,将预报时刻面临的水雨情分6种情况,针对不同的情况提出不同的预报方案,并对2000-2010年的8个典型旬进行了预报效果检验.计算结果表明,基于水雨情信息分类的旬径流预报方法预报效果较好,能够用于指导浑江桓仁水库日常调度.
摘要：随着我国经济的飞速发展，对于建筑的需求量以及要求都在不斷的提高。相对于普通混凝土结构来说，大体积混凝土具有非常多的优点，但同时由于其体积较大，施工较为复杂等缺点，需要通过一定的技术手段进行控制。本文就大体积混凝土裂缝进行阐述，并通过相应的施工技术进行控制，以供参考。 关键词：大体积混凝土；特点；裂缝；施工技术 中图分类号： TV331 文献标识码： A 一、定义 大体积混凝土是指最小
The abatements of 89 pharmaceuticals in secondary effluent by ozonation and the electro-peroxone (E-peroxone) process were investigated.Based on the results,a quantitative structure-activity relationship(QSAR) model was developed to explore relationship b
Antibiotic contamination of the water environment has attracted much attention from researchers because of their potential hazards to humans and ecosystems.In this study,a multi-template molecularly imprinted polymer (MIP) modified mesoporous silica coate
凉水河既是北京市“南分洪”重要排洪河道,又是重要的景观河道.随着水生态环境改善和居民亲水需求增长,凉水河功能逐渐由单一的防洪排涝向“防洪、生态、景观、休闲”等多功能综合利用转变.基于MIKE11模型,以不淹没两岸服务通道及壅水不影响上游闸坝调度为原则,经模拟计算提出了主要闸坝非汛期控制运用水位要求,并进行了蓄水效益分析.分析结果表明,洋桥橡胶坝、大红门闸、马驹桥闸、新河闸、张家湾闸非汛期推荐的控制运用水位分别为35.22 m、32.25 m、23.85 m、18.96 m和17.05 m;与敞泄运行相比,
为提高大清河流域拒马河水系紫荆关流域山洪模拟及预报的准确性,推求紫荆关流域临界雨量,以期为流域山洪预报预警提供参考.基于紫荆关流域实测场次暴雨洪水数据及流域下垫面资料,构建了紫荆关流域HEC-HMS水文模型,以不同缩放比例的典型降雨过程为输入,通过大量模型运行计算,推算了流域不同土壤湿度条件下的临界雨量.研究结果表明,构建的流域HEC-HMS模型率定期及验证期的模拟洪峰及洪量的相对误差均在20％以内,能够满足精度要求,HEC-HMS模型可用于紫荆关流域洪水模拟与洪水预警.流域前期土壤湿度条件为影响临界雨量
受气候变化影响,近年来甘肃省疏勒河流域极端天气频次增多,暴雨特性发生变化,暴雨洪水显现新的特点.采用流域4个站点1958-2018年逐日降水和不同历时暴雨资料,分析了年降水量、最大24 h降水量的时空特征,结果表明,流域年降水量从上游向下游迅速衰减,历史降水量呈明显增加趋势,各历时暴雨均呈现明显增多增强趋势,进入21世纪以来,极端暴雨呈现频次增多、发生时间段更集中的新特点.
In this paper,the machine learning (ML) model is built for slope stability evaluation and meets the high precision and rapidity requirements in slope engineering.Different ML methods for the factor of safety (FOS) prediction are studied and compared hopin
Seven-degree-of-freedom redundant manipu-lators with link offset have many advantages,including obvious geometric significance and suitability for configu-ration control.Their configuration is similar to that of the experimental module manipulator (EMM) i