Study of Total Dissolved Solids (TDS) Concentrations Factor of SWCC Al-Khobar Plant Seawater Intakes

This study presents a significant contribution to the field of water quality assessment and sustainable water management practices. By evaluating the levels of total dissolved solids (TDS) in seawater intakes within Al-Khobar desalination production system, the study addresses a crucial aspect of water treatment and environmental impact assessment. The findings provide valuable insights into the variations and trends of TDS levels across different phases of the system, highlighting the importance of monitoring and management strategies. The study provided both gravimetric total dissolved solids (TDS) and electrical conductivity (EC) measurements to analyze TDS calculation factor and evaluate measurement accuracy. Results revealed significant variations in TDS levels across the sampling locations, with phase-2 exhibiting higher levels and greater fluctuations. Phase-3 displayed similar trends but with lower TDS levels, while phase-4 showed slightly different behavior with higher average TDS levels. EC measurements demonstrated a strong correlation with TDS, providing a reliable estimation. However, additional methods such as gravimetric analysis should be employed to confirm TDS measurements. The findings contribute to understanding water quality in the Al-Khobar desalination system, aiding in monitoring, management, and decision-making processes for water treatment and environmental impact assessment. The study enhances the credibility of water quality assessments and supports sustainable water management practices.

TDS智能干选系统在哈尔乌素选煤厂的应用实践

为解决浅槽分选机入选量大、后续煤泥水系统负荷较大等问题,准能哈尔乌素选煤厂采用TDS智能干选机分选200~(70)50 mm块煤。生产实践表明,TDS智能干选机运行平稳,矸中带煤率2.42%、中煤发热量9.21 MJ/kg、精煤发热量22.00 MJ/kg;减少了浅槽分选机的处理量,降低了煤泥水系统负荷;增加了全厂销售收入,降低了生产成本,提高了经济效益。

TDS智能干选机的优化改造应用

TDS智能干选机作为关键设备在矿山和冶金工业中扮演着重要角色。优化改造其功能和性能对提高生产效率、减少能源消耗和降低成本具有重要意义。本篇文章将探讨TDS智能干选机优化改造的重要性、存在的问题,并提出相应的改造方案,以期为相关行业提供更有效的技术支持和改进方案。

Impacts of Climate Change on Seawater Temperature and Total Dissolved Solids: Challenges and Sustainable Solutions for Reverse Osmosis Desalination in the Arabian Gulf Region

This article examines the influence of seawater temperature and total dissolved solids (TDS) on reverse osmosis (RO) desalination in the Arabian Gulf region, with a focus on the impact of climate change. The study highlights the changes in seawater temperature and TDS levels over the years and discusses their effects on the efficiency and productivity of RO desalination plants. It emphasizes the importance of monitoring TDS levels and controlling seawater temperature to optimize water production. The article also suggests various solutions, including intensive pre-treatment, development of high-performance membranes, exploration of alternative water sources, and regulation of discharges into the Gulf, to ensure sustainable water supply in the face of rising TDS levels and seawater temperature. Further research and comprehensive monitoring are recommended to understand the implications of these findings and develop effective strategies for the management of marine resources in the Arabian Gulf.

基于Copula函数的人民胜利渠灌区地下水埋深与TDS联合分布分析

为了查明不同埋深区域地下水溶解性总固体(TDS)变化规律,选择人民胜利渠灌区为研究区,根据地下水TDS值将灌区划分为高值区域、过渡区域和低值区域,采用AIC准则筛选出最优Copula函数,采用最优Copula函数构建不同区域地下水埋深与TDS之间的联合分布,对两者的关系进行分析。结果表明:不同区域地下水埋深与TDS之间均具有较强的正相关关系,高值区域地下水埋深和TDS最优边缘分布均为Gamma分布,过渡区域和低值区域地下水埋深最优边缘分布均为Weibull分布、TDS最优边缘分布均为Gamma分布。各典型观测井埋深-TDS最优联合分布函数均为Frank Copula函数。根据联合概率等值线可得当地下水埋深与TDS增大时,联合概率值也增大;当联合概率值一定时,TDS随着地下水埋深的增大而降低,并趋于稳定;联合概率等值线也可以反映任意埋深下TDS所发生的概率,以及同一概率下不同埋深与TDS之间可能出现的组合。

Biological Treatability of Low Total Dissolved Solids (LTDS) Using SBR as a Pre-Treatment for Reverse Osmosis

Huge quantity of effluents is generated from pharmaceutical industries attributed to their wide array of manufacturing and maintenance processes. Wastewaters from pharmaceuticals are characterized by the presence of solids, pH, temperature, biodegradable organic compounds, unusual turbidity, hardness and conductivity. Wastewater from pharmaceutical industry arising from various units is categorised as low total dissolved solids (LTDS) and high total dissolved solids (HTDS) based on the concentration of total dissolved solids. The present study focuses on treatment of LTDS using a combination of biological treatment followed by membrane process, reverse osmosis. This research presents the results from the pilot-scale studies focussed on biological treatment using SBR as pre-treatment for RO towards the removal of LTDS effluent. Three-month data on a daily basis is presented. The efficiency of the process was tested with a reduction in parameters like total dissolved solids and chemical oxygen demand. SBR tested for its suitability as a preliminary treatment for the Reverse Osmosis process during the months of August-October. The highest and lowest TDS reduction was recorded as 9.72% and ?4.67% in the month of August. The highest and least COD reduction was recorded as 87.28% and 80.66% in the same month. The highest and lowest TDS reduction was recorded as 0.84% and ?7.92% in the month of September. The highest and least COD reduction was recorded as 87.07% and 83.28% in the same month. The performance of RO tested for its efficiency in removing the TDS and COD after SBR as pre-treatment. The highest and lowest TDS reduction was recorded as 94.93% and 93.27% in the month of August. The highest and least COD reduction was recorded as 96.84% and 90.19% in the same month. The highest and lowest TDS reduction was recorded at 96.53% and 91.25% in the month of October. The highest and least COD reduction was recorded as 94.31% and 72.57% in the same month. SBR has proved to be a promising solution for pre-treatment removing all substances that might result in membrane fouling. Hence, the present study concludes that a combination of SBR and RO will be a promising solution for effective removal of TDS and COD from pharmaceutical wastewaters.

TDS与高校合作背景下学前教育见习生保教能力提升策略——以湖州S幼儿园为例

浙江省自2017年发布《教师发展学校建设标准》以来,TDS(教师发展学校)在教育行政部门、高校和幼儿园三方协同机制的作用下,在培养学前教育人才方面通过有效的优势互补使,使人才质量总体得到提升。但是,在本地TDS幼儿园和地方高校的合作实践中,发现见习生保教能力方面存在集中活动的组织不到位、缺乏批判性思维的问题,同时高校方面的指导亦存在不足。对此,本研究提出了相应的解决策略。

东曲选煤厂TDS智能干选机供风系统改进

为解决东曲选煤厂TDS智能干选机供风质量及供风环境差,影响分选效果的问题,对供风系统进行了改进。采用PLC及变频器改进了空压机启停方式;对供风系统配套的冷干机、储气罐排污方式进行升级改造,并对其老旧供风管路进行更新。改进后,设备供风环境的稳定性得到了保障,降低了配套设备、设施及配件的损耗,提高了TDS智能干选机的工作效率。

Non-symmetric distributions of solids deposition for solid-water stratified flow in deviated tubing strings

Dynamic performance on solids flow with water in deviated tubing is essential for the reliability of pump and normal operation of horizontal and directional wells.Compared with coal-water flow in vertical tubing and sand-oil flow with high production in deviated tubing,solids deposition with water shows obvious non-symmetric distributions in deviated tubing from simulations and experiments.The mathematical model of two phase flow was developed under coupling conditions of deviated tubing,low flow rate and viscosity based on the kinetic theory of granular flow and first-order discrete scheme.The results show that solid-water stratified flow in deviated tubing can be divided into two zones of suspension bed and the moving bed throughout the flow field.The solid flowing velocity with water is negative and particles slide down at the bottom of moving bed zone.The process of solids flow with water in deviated tubing will produce pressure loss and consume the kinetic energy.The thickness of deposited layer and the flowing velocity of solids flow downward with water at the moving bed zone enhance with the decreased inlet flow rate and the increased particle size,tubing inside diameter(ID)and inclination angle.Solids are easier into suspension from the upper part of moving bed zone to suspension bed zone and more solid particles flow with water towards the tubing outlet with the increase of inlet flowing velocity.The decision is made to reduce the screen width,tubing ID and inclination angle to maintain to be greater than critical deposition velocity in order to prevent solids settling.And it provides the theoretical basis and technical reserves for solid control and offers an effective approach to enhance tubing cleaning in deviated strings.

井下TDS智能矸选系统巷道及硐室群布置设计

为了实现矿井矸石不上井、提高主井净提升能力,设计将TDS智能矸选系统布置在井下,分析了TDS智能矸选系统的运行规律,研究其矸选巷道及硐室群布置形式,并对其平面布置、竖向布置进行详细论述,给出了TDS智能矸选巷道及硐室群支护方式和支护参数。在此基础上,结合三河口矿井生产系统实际情况,对井下TDS智能矸选系统巷道及硐室群布置进行了设计,为类似矿井井下TDS智能矸选系统设计提供参考。

Recent progress in self-repairing coatings for corrosion protection on magnesium alloys and perspective of porous solids as novel carrier and barrier

Featuring low density and high specific strength, magnesium(Mg) alloys have attracted wide interests in the fields of portable devices and automotive industry. However, the active chemical and electrochemical properties make them susceptible to corrosion in humid, seawater, soil,and chemical medium. Various strategies have revealed certain merits of protecting Mg alloys. Therein, engineering self-repairing coatings is considered as an effective strategy, because they can enable the timely repair for damaged areas, which brings about long-term protection for Mg alloys. In this review, self-repairing coatings on Mg alloys are summarized from two aspects, namely shape restoring coatings and function restoring coatings. Shape restoring coatings benefit for swelling, shrinking, or reassociating reversible chemical bonds to return to the original state and morphology when coatings broken;function self-repairing coatings depend on the release of inhibitors to generate new passive layers on the damaged areas. With the advancement of coating research and to fulfill the demanding requirements of applications, it is an inevitable trend to develop coatings that can integrate multiple functions(such as stimulus response, self-repairing, corrosion warning,and so on). As a novel carrier and barrier, porous solids, especially covalent organic frameworks(COFs), have been respected as the future development of self-repairing coatings on Mg alloys, due to their unique, diverse structures and adjustable functions.

井下TDS智能分选系统在田陈煤矿中的应用

为了降低手选劳动强度,提高分选效率与煤质,增加销售收入,田陈煤矿通过引入TDS智能干选机对50~200mm块原煤进行井下预排矸作业,以替代传统的手选作业。实践证明,TDS智能分选系统成效显著,TDS设备排矸率达到90%以上,矸中带煤率在3%以下。有效提升了矿井选煤能力,增加了煤炭产量,提高了企业的生产效益。

TDS智能干法分选机在汾西矿业原煤准备系统的应用分析

介绍了汾西原煤准备车间及分选系统基本情况,以及TDS智能干法分选机在汾西矿业原煤准备系统中的应用效果。实践应用表明,TDS智能干选机在汾西各洗煤厂应用效果较好。

The dissolution of total suspended solids and treatment strategy of tailwater in a Litopenaeus vannamei recirculating aquaculture system

In recirculating aquaculture systems(RASs),the effective treatment of aquaculture tailwater is essential to maintain the health of the RAS.This study investigated the optimal time and method for tailwater treatment during three periods of the aquaculture of the Litopenaeus vannamei:nursery(0–26 d),middle(27–57 d),and later(57–104 d).The variation of several water parameters during the dissolution of total suspended solid(TSS)in tailwater,applied with the effects of ozone on the microorganism and water quality parameters were investigated.Results showed that the TSS concentrations in tailwater decreased with time,although not significantly(P>0.05),whereas total ammonia nitrogen(TAN),nitrite(NO-2-N),and nitrate(NO_(3)^(-)-N)increased significantly(P<0.05).Therefore,TSS should be removed from the tailwater as early as possible,being most optimal within 4 h.Ozone removed 38.24%–48.95%of TSS,17.78%–90.14%of TAN,and 87.50%–98.90%of NO-2-N after 4 h of treatment.However,it resulted in the significant accumulation of NO_(3)^(-)-N.Moreover,the total number of Vibrio and bacterial counts in aquaculture tailwater was reduced completely by ozone within 4 h.Thus,these results provided technical details and data support for the effective treatment of tailwater from shrimp RAS.

不同TDS值的水配制抗原修复液对免疫组化结果的影响

在临床病理诊断中,免疫组化技术是病理诊断的重要辅助手段之一。在日常工作中,如果免疫组化结果出现异常,临床上会复盘回顾整个免疫组化操作流程及各种影响因素,通常会考虑修复方式,修复时间,孵育时间等因素,不会考虑配制修复液的纯水离子浓度。2022年10月科室免疫组化结果出现定位不准确,阳性细胞数明显减少以及阳性强度不够,甚至假阴性结果,排除实验中操作流程及试剂效价对免疫组化结果的影响后,检测发现抗原修复液离子浓度(TDS值)偏高,遂溯源,发现纯水TDS偏高,纯水中硝酸盐、硫酸盐、氯化物偏高。采用TDS=0的纯水配制抗原修复液后效果显著改善,现将实验过程做一个回顾性分析。

官地矿TDS智能选矸及充填开采应用情况

针对官地煤矿矸石排放治理难题,在对井下煤矸分选工艺分析选择、井下充填工艺分析选择、井下矸石智能分选位置的分析基础上,选择了TDS智能干选系统,配合架后综合机械化充填技术,实现了井下矸石回填不外排,解决了制约矿井发展的矸石排放问题,具有良好的经济和社会效益。

锦源煤矿TDS智能干选机的应用实践

与浅槽、动筛等传统的水洗工艺相比,TDS无需水、介质和无煤泥水处理环节。因此,TDS在井下应用,有得天独厚的优势。锦源煤矿通过使用TDS智能干选机,不仅可以解决矸石和环境等问题,还可以通过增加充填系统为开采村下压煤做准备。

绿色复合还原剂在靛蓝染色中的应用

靛蓝是纺织工业中最重要的还原染料之一,靛蓝染色时,必须在还原剂作用下转化为水溶性隐色体形式。该研究旨在寻找一种复合绿色还原剂,以替代靛蓝染色中使用的对环境不利的连二亚硫酸钠(sodium dithionite,SD)。首先,比较了三种还原剂,SD、二氧化硫脲(thiourea dioxide,TD)和葡萄糖(glucose,GS)的稳定性。采用TD作还原剂剧烈搅拌2h仍能保持靛蓝染色所需还原电位,而SD和GS剧烈搅拌1h达不到靛蓝染色所需的还原电位,靛蓝染色性能下降。鉴于GS的环境友好性,选择TD与GS复合物作为靛蓝染色的复合绿色还原剂。其次,分析复合还原剂不同质量比对棉织物靛蓝染色的还原电位、pH值和K/S值的影响。当TD与GS的质量比为7:3,体系具有稳定的还原电位,可获得较好的染色性能。

CBIT联合盐酸硫必利治疗抽动障碍患儿临床效果及其对生活质量的影响

目的 探讨综合行为干预疗法(CBIT)联合盐酸硫必利治疗抽动障碍(TD)患儿的临床效果及其对生活质量的影响。方法 将90例TD患儿按照随机数字表法分为研究组、对照1组、对照2组,每组30例。对照1组患儿给予盐酸硫必利治疗,对照2组患儿给予CBIT训练治疗,研究组患儿给予CBIT训练联合盐酸硫必利治疗。比较三组患儿耶鲁综合抽动严重程度量表(YGTSS)、注意力缺陷多动障碍评定量表(SNAP-IV)、儿童耶鲁-布朗强迫症量表(CY-BOCS)、儿童生活质量量表(PedsQL)、临床总体印象改善量表(CGI-I)评分、临床疗效和不良反应情况。结果研究组患儿治疗总有效率高于对照1组、对照2组(P<0.05)。治疗3个月末,三组患儿YGTSS、SNAP-IV、CY-BOCS评分均较治疗前降低,且研究组低于对照1组、对照2组(P<0.01)。治疗3个月末,三组患儿PedsQL评分均较治疗前升高,且研究组高于对照1组、对照2组(P<0.01)。治疗3个月末,研究组患儿CGI-I评分低于对照1组、2组(P<0.01)。三组患儿不良反应总发生率无明显差异(P>0.05)。结论 CBIT训练联合盐酸硫必利治疗对TD患儿的临床疗效确切,可改善抽动、多动、强迫症状,提高生活质量,改善临床总体印象,且安全性较好。

二硒化钴电催化剂的制备及氧还原性能测试

具有高附加值的绿色环保型氧化剂——过氧化氢(H_(2)O_(2))的需求日益增加,急需发展绿色且安全的H_(2)O_(2)合成新方法。两电子氧还原反应(2e-ORR)是一种制备H_(2)O_(2)的高效方法,其中催化剂的高效率和高选择性是2e-ORR的关键。对二硒化钴(CoSe_(2))电催化剂的制备和性能测试实验进行了探索。首先,通过联氨还原法制备钴纳米粒子;然后,通过简单的固相反应并在不同温度下退火制备CoSe_(2)电催化剂;最后,通过一系列的表征方法对CoSe_(2)电催化剂的表面形貌、晶型、电化学及其稳定性等进行了研究。为2e^(-)ORR电催化剂CoSe_(2)的进一步研究和应用开发提供借鉴。