Marketing Netcoatings for Aquaculture

Unsustainable harvesting of natural fish stocks is driving an ever growing marine aquaculture industry. Part of the aquaculture support industry is net suppliers who provide producers with nets used in confining fish while they are grown to market size. Biofouling must be addressed in marine environments to ensure maximum product growth by maintaining water flow and waste removal through the nets. Biofouling is managed with copper and organic biocide based net coatings. The aquaculture industry provides a case study for business issues related to entry of improved fouling management technology into the marketplace. Several major hurdles hinder entry of improved novel technologies into the market. The first hurdle is due to the structure of business relationships. Net suppliers can actually cut their business profits dramatically by introducing improved technologies. A second major hurdle is financial costs of registration and demonstration of efficacy and quality product with a new technology. Costs of registration are prohibitive if only the net coatings market is involved. Demonstration of quality product requires collaboration and a team approach between formulators, net suppliers and farmers. An alternative solution is a vertically integrated business model in which the support business and product production business are part of the same company.     

Electrochemical and theoretical assessment of the effect of two biocides on the corrosion of petroleum steel in sulfur‐polluted Black Sea water

Although the inhibitory effects of different biocides continue to gain ever‐increasing importance, the corrosion inhibition of petroleum steel in the Black Sea water by such compounds remains largely uncharacterized. Thus, to study the effect of sulfate‐reducing bacteria, corrosion parameters in oxygen‐free medium contaminated with sulfur have been determined. The variation of corrosion rates with the addition of two biocides, glutaraldehyde (GA) and ammonium chloride (AC), has been determined by using Tafel extrapolation and linear polarization methods in sulfur‐polluted seawater, both with and without biocides. Overall, this experimental work, also corroborated by theoretical data, reveals that some concentrations of GA and AC act as effective biocides in sulfur‐polluted medium.     

聚六亚甲基胍杀菌剂的制备及其在海洋油田中的应用

以己二胺和盐酸胍为原料,合成一种聚六亚甲基胍杀菌剂(BHS-49)。与其他主流杀菌剂进行对比,侧重研究其杀菌能力,BHS-49加注质量浓度30mg/L时,SRB含量最低,平均值为25.5个/mL。在海上油田开展现场试验,结果显示,各级检测点细菌含量明显降低,FPSO缓冲罐出口细菌含量降低至6个/mL。同现场在用杀菌剂BHS-29相比,SRB含量降低76%,满足排放要求。与此同时,杀菌剂BHS-49加注期间,现场流程稳定,各监测点出口水质未出现波动。     

Antimicrobial coatings produced by “tethering” biocides to the coating matrix: A comprehensive review

Covalently attached, non-leaching biocidal-moieties are being explored as an environmentally friendly option for replacing antimicrobial coatings that release biocides. This review highlights studies on antimicrobial surface treatments and coatings in which the antimicrobial agent is covalently bound (i.e. tethered) to the surface or coating matrix. In addition, test methods for measuring antimicrobial surface activity are reviewed, and a discussion of advantages and disadvantages of the various methods is provided.     

造纸系统中的微生物控制

从微生物种类和性质、微生物检测方法、造纸系统微生物繁殖状况、微生物控制需注意的问题等角度探讨了怎样更好地对造纸流程中微生物污染问题进行预防和控制。     

TS系列水处理药剂在炼油企业的应用

介绍了TS系列水处理药剂在炼油企业循环水系统长期泄漏条件下的应用情况。实际监测结果表明,杀菌灭藻剂TS-781。缓蚀阻垢剂TS-50911在该条件下具有良好的清洗剥离和缓蚀作用,使企业取得了良好的经济效益。     

冷却水中藻类去除方法的研究进展

藻类污染作为水体污染的一部分,已引起人们的广泛关注。作者对物理法、化学法和生物法去除冷却水中的藻类的国内外现状进行了概述。综述了光磁协同、电化学等物理除藻方法,铜电解、臭氧氧化、化学药剂复配等化学除藻方法,以及利用水网藻和改性海带的生物除藻方法。并对各种方法的除藻机理及应用效果进行了简述。在总结国内外研究的基础上,对未来发展前景进行了评价和展望。     

新型长链脂肪胺非氧化性杀生剂的杀生作用

对新型循环冷却水用杀生剂FA 101杀生性能进行了试验室静态试验,包括不同浓度杀生效果、酸碱度对药效的影响、药效持续时间等试验,并与异噻唑啉酮进行了研究比较,表明FA 101是一种高效杀生剂,有很好的发展前景。     

DBNPA的合成及其抗菌性能研究

二溴次氮基丙酰胺(简称DBNPA)是一种环保型杀菌灭藻剂和水处理剂,通过实验,发现了合成它的最佳方法和反应条件,即在H2O2的作用下,使Br2与氰基乙酰胺(CAA)溶液一起加热回流,可制备高产率的二溴次氮基丙酰胺,其最佳反应条件为:反应温度80～90℃;反应时间20～30min;反应物配比(摩尔比)CAA∶Br2为1∶(1.1～1.3)。采用微生物学检验技术,对其进行了杀菌试验,测试了该物质的杀菌性能。