Institute of Urban Environment,Chinese Academy of Sciences
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Organic amendments impact the availability of heavy metal(loid)s in mine-impacted soil and their phytoremediation by?Penisitum americanum?and?Sorghum bicolor
一种废水磷肥生产组合装置
本实用新型公开一种低成本废水磷肥生产组合装置,主要由一级吹脱池、一级沉淀池、二级吹脱反应池、二级沉淀池、pH值控制系统和曝气机组成。其特征在于:一级吹脱池上部设有废水进水管,下部设置曝气头;一级沉淀池顶部安装pH计电极探头,通过监测pH值控制一级吹脱池的曝气机启动和停止;一级吹脱池和一级沉淀池共有污泥区,其斜边与水平角度为20°- 60°;二级吹脱反应池上部设有碱液进管、镁盐溶液进管,下部设有曝气头;二级沉淀池顶部设pH计电极探头,通过监测pH值变化控制二级吹脱反应池内的加碱量;二级沉淀池与二级吹脱反应池共有磷肥收集区,其斜边与水平角度为20°- 60°,底部设磷肥收集管。此装置结构简单紧凑,占地面积小,操作简便,可极大减少废水磷酸铵镁生产时投加的碱量,降低磷肥中杂质含量,实现从畜禽养殖废水沼液、污泥厌氧上清液、消化污泥脱水滤液等磷含量较高的废水中回收高品质的磷肥
一种矢量化流通式采样器
本实用新型涉及一种矢量化流通式采样器,包括用于采样大气污染物的采样管,所述采样管安装于流体管内,所述流体管底部安装有转动轴承,所述转动轴承内连接有用于支撑流体管的支架,所述支架顶部设有转动感应装置,所述采样管的两端设有筛网,所述采样管和采样管两端的筛网形成的空间内设有采样介质,所述流体管内设有内部风速测定装置,所述流体管外设有外部环境风速风向测定装置。本实用新型利用风力驱动空气流经采样介质,大幅度提高采样速率,缩短采样时间;同时根据同步的风速、风向和指向数据对采样体积计量进行矢量化,从而估算各个方向来源对采样位点目标物的贡献度;融合了主动采样的采样流量稳定的优点和被动采样的无电驱动力的优点,采样迅速且采样体积计量精度高,并且无需电能作为采样动力
Soil nitrogen availability alters rhizodeposition carbon flux into the soil microbial community
Effects of antibiotics on characteristics and microbial resistance of aerobic granules in sequencing batch reactors
The response of characteristics and microbial resistance of aerobic granules to sulfamethazine, oxytetracycline and ciprofloxacin at ppb level in swine wastewater was investigated in this study. Results showed that no significant changes in physical strength, average granules size and settling property of aerobic granules were observed with target antibiotics exposure (P > 0.05). However, compared to the control group, the protein/polysaccharide ratio and zeta potential of aerobic granules in t
Long-term field application of sewage sludge increases the abundance of antibiotic resistance genes in soil
废水磷回收前处理工艺
一种废水磷回收前处理工艺,属于水污染控制与资源再生领域,它包括以下工序:首先含磷废水在吹脱池(塔)中进行CO2吹脱;吹脱后的废水以自流形式进入沉淀池;废水在沉淀池内进行悬浮有机物、胶体和部分沉淀产物的去除;沉淀池出水再通过磷酸铵镁或磷酸钙结晶反应进行磷回收。本发明所提供的废水磷回收前处理的工艺,可极大减少磷回收时投加的碱量,降低磷回收产品中杂质的含量,同时有效解决水泵、管配件等设施结垢的问题