一种有机物污染土壤原位淋洗修复设备

本实用新型涉及土地污染处理技术领域，具体涉及一种有机物污染土壤原位淋洗修复设备。包括筒体，具有一容纳土壤的腔体，筒体壁设有一进土口和一出土口；土壤淋洗单元，包括一加压泵、喷淋管和淋洗喷头，淋洗喷头设置于筒体内的腔体底部，加压泵输出端连接有一进液管，进液管与喷淋管连通，喷淋管与淋洗喷头连通；土壤修复单元，包括一微纳米气泡发生单元和臭氧池，微纳米气泡发生单元与臭氧池进口连通，臭氧池经管道与加压泵连通，三相分离单元，设置于筒体内顶部，包括一集气区和一沉淀区，该沉淀区底部开设有回流缝，沉淀区顶部两侧设有廊道，廊道通过输液管道与臭氧池进液口连通。本实用新型能够避免土壤移动并避免空气二次污染

Draft Genome Sequence of the Bisphenol A-Degrading Bacterium Sphingobium sp. Strain YL23

<em>Sphingobium</em> sp. strain YL23, a novel bacterium isolated from sewage sludge of a domestic wastewater treatment plant, has been shown to completely degrade bisphenol A under aerobic conditions. Here, we describe a 3.8-Mb assembly of its genome sequence and major findings from its annotation

Interaction of silver nanoparticles with pure nitrifying bacteria

In this study, Nitrosomonas europaea ATCC 19718 was exposed to silver nanoparticles (AgNPs) of different particle size (7&nbsp;&plusmn;&nbsp;3 and 40&nbsp;&plusmn;&nbsp;14&nbsp;nm) and different coatings (polyvinyl alcohol and adenosine triphosphate disodium). For all different AgNPs used in the study, large aggregates were gradually formed after addition of AgNPs into the media containing <em>N. europaea</em>. The scanning electron microscopy and energy dispersive X-ray spectroscopy of the microstructures suggested that bacterial cells and electrolytes had significant effects on AgNP aggregation. Size- and coating-dependent inhibition of ammonia oxidation by AgNPs was observed, and our analysis suggested that the inhibition was not only due to the released dissolved silver, but also the dispersity of AgNPs in the culture media. Electron microscopy images showed AgNPs could cause the damage of cell wall of <em>N. europaea</em> and make the nucleoids disintegrated and condensed next to cell membrane. Surface-enhanced Raman scattering signals also implied the damage of cell membrane caused by AgNPs. Further protein expression analysis revealed that AgNPs would inhibit important protein functions, including biosynthesis, gene expression, energy production and nitrification to further cause toxicity to <em>N. europaea</em>. Our findings explain the susceptibility of <em>N. europaea</em> to inhibition by AgNPs and the possible interaction between each other. Future research is needed to characterize these effects in more complex cultures and media such as activated sludge and wastewater

一种新型水压式强化生物化粪池

<p>本发明涉及农村生活污水生物处理及污水资源化利用技术领域，特别是指一种新型水压式强化生物化粪池。其特征是由一个三格式化粪池、两个进料口和一个出水井组成。固体粪便从固体粪便进料口（1）进入第一格化粪池（6）进行发酵，产生的沼气收集于储气室（17），通过输气管道（5）供居民使用。液体粪便进料口（2）进入第二格化粪池（7）。第三格化粪池（8）中设有固定的软性填料（10）。出水井（9）中设有弯管出水口（13），同时出水口（13）亦是溢流口，可提高安全系数。本发明是一种结构合理、产气效果好、无漏气、安全系数高、出水悬浮物浓度低、进化效能高、投资成本低的一种新型水压式强化生物化粪池。</p

离心分离内插管

<p class="th">一种离心分离内插管，口部敞开，底部留有小孔，管内接近底部小孔处有一过滤片。内插管外径尺寸与市售的离心管内径相一致，可以插入普通离心管中后不留空隙。内插管口部边缘向外突出，突出尺寸与普通离心管壁厚度相一致，插入离心管后口部边缘刚好卡住普通离心管口。与普通离心管配合使用，离心时通过过滤片截住团状或块状吸水性载体物质，分离液体。</p

Microbial degradation of steroidal estrogens

Steroidal estrogens, widespread in the environment, are contaminants of potential concern because exposure to these compounds can cause adverse impacts on aquatic life. Intensive research efforts have been undertaken in order to better understand the environmental occurrence of these compounds. In addition to physical/chemical reactions, biological processes &ndash; microbial biodegradation of steroidal estrogens &ndash; play a vital role in determining the fate and transport of these compounds in built and natural environments. This review summarizes the current state of knowledge on the microbiology of estrogen biodegradation. Aerobic and anaerobic estrogen-degrading microorganisms are phylogenetically diverse; they are mainly isolated from soils, activated sludge, dental plaque and intestines. Estrogens can be degraded via growth-linked and non-growth-linked reactions, as well as through abiotic degradation in the presence of selective microorganisms. Current knowledge on estrogen biodegradation kinetics and pathways is limited. Molecular methods are useful in deciphering estrogen-degrading microbial community and tracking the quantity of known degraders in bioreactors with different operating conditions. Future research efforts aimed at bridging knowledge gaps on estrogen biodegradation are also proposed

Removal of silver nanoparticles by coagulation processes

Commercial use of silver nanoparticles (AgNPs) will lead to a potential route for human exposure via potable water. Coagulation followed by sedimentation, as a conventional technique in the drinking water treatment facilities, may become an important barrier to prevent human from AgNP exposures. This study investigated the removal of AgNP suspensions by four regular coagulants. In the aluminum sulfate and ferric chloride coagulation systems, the water parameters slightly affected the AgNP removal. However, in the poly aluminum chloride and polyferric sulfate coagulation systems, the optimal removal efficiencies were achieved at pH 7.5, while higher or lower of pH could reduce the AgNP removal. Besides, the increasing natural organic matter (NOM) would reduce the AgNP removal, while Ca^{<font size="1">2+</font>} and suspended solids concentrations would also affect the AgNP removal. In addition, results from the transmission electron microscopy and X-ray diffraction showed AgNPs or silver-containing nanoparticles were adsorbed onto the flocs. Finally, natural water samples were used to validate AgNP removal by coagulation. This study suggests that in the case of release of AgNPs into the source water, the traditional water treatment process, coagulation/sedimentation, can remove AgNPs and minimize the silver ion concentration under the well-optimized conditions

复合物理环境模拟实验箱

<p>本实用新型涉及一种复合物理环境模拟实验箱，尤其是可模拟单一或复合物理环境的实验箱。本实用新型主要通过对单一或复合的环境物理因子（光、热、低频电磁场、射频电磁场）进行准确调控，在保证实验对象基本生存条件、防止二次污染的前提下，为深入系统地研究环境物理因子对生物、材料等实验对象的影响提供理想的实验平台。本实用新型主要分为外部结构和内部结构，外部结构包括箱体、集成控制面板、变频电源，内部结构包括亥姆霍兹线圈组、线圈支架、射频天线、实验台、紫外-可见灯组、温湿度控制系统。</p

复合物理环境模拟实验箱

<p>本实用新型涉及一种复合物理环境模拟实验箱，尤其是可模拟单一或复合物理环境的实验箱。本实用新型主要通过对单一或复合的环境物理因子（光、热、低频电磁场、射频电磁场）进行准确调控，在保证实验对象基本生存条件、防止二次污染的前提下，为深入系统地研究环境物理因子对生物、材料等实验对象的影响提供理想的实验平台。本实用新型主要分为外部结构和内部结构，外部结构包括箱体、集成控制面板、变频电源，内部结构包括亥姆霍兹线圈组、线圈支架、射频天线、实验台、紫外-可见灯组、温湿度控制系统。</p