Results 1 to 10 of about 78,947 (114)
Gongye shui chuli, 2023 在厌氧折流板反应器（ABR）中探究厌氧氨氧化菌和异养反硝化菌的分步培养，以及进水氮负荷波动对系统性能的影响。结果表明，维持C/N为0.65，逐步提升总氮负荷（NLR），50 d左右可实现厌氧氨氧化与反硝化协同脱氮，总氮去除率可达95.8%。NLR波动值低于1.04 kg/（m3·d）时，对工艺脱氮性能无显著影响。负荷变化幅度越大，厌氧氨氧化菌活性受抑制越显著，对反硝化菌基本无影响，负荷波动值达到2.10 kg/（m3·d）时厌氧氨氧化对氮的去除贡献（CA）下降至54.8 ...
王弄潮 +3 more
doaj +2 more sources
Gongye shui chuli, 2003 针对南方特有的低浓度生活污水,研究了在低曝气条件下,气水比、水力负荷、进水有机负荷、碳氮比、填料层高度等因素对曝气生物滤池容积负荷的影响。结果表明,在气水比为3～1,碳氮比为3～4,水力负荷为1.1m3/(m2·h)条件下,CODCr和氨氮的去除率分别为97.37%和82.28%,出水有机物和氨氮质量浓度分别为3.4mg/L和6.94mg/L。碳氮比对反应器CODCr容积负荷的影响较对氨氮容积负荷的影响更为明显;氨氮的去除率受水力负荷的变化影响较小。
王立立, 刘焕彬, 胡勇有, 周勤
doaj +2 more sources
Gongye shui chuli, 2010 针对化肥企业氨氮废水排放量大、污染物浓度高的特点,采用高效串联-改进式曝气生物滤池(BAF)对化肥氨氮废水进行了处理及耐冲击负荷试验研究。试验结果表明,高效串联-改进式BAF可以将200mg/L左右的进水氨氮处理至出水>5mg/L。同时对突发高氨氮负荷或低氨氮负荷缓冲能力较强,对高氨氮、高COD负荷进水,通过补充高效菌种,可以达到较高去除率。
赵慧 +6 more
doaj +2 more sources
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT Engineering of the catalyst interface and modulation of transition–metal d–band play critical roles in the electrocatalytic hydrogen evolution reaction (HER). Herein, a synthetic strategy is developed to fabricate nitrogen‐doped carbon nanotubes (N–CNTs)–supported Ni3Se4–CeO2 heterojunction catalysts through a facile chemical vapor deposition (
Zhiqiang Sun +10 more
wiley +1 more source
Gongye shui chuli, 2015 以SDC型生物膜载体作为反硝化生物滤池(DNBF)的填料,研究不同水力负荷下DNBF的脱氮效果。结果表明:小试时改变水力负荷对反应器脱氮效果的影响较显著。综合考虑滤池对硝态氮、亚硝态氮、总氮的去除效果及水力停留时间,确定其最佳水力负荷为0.015 m3/(m2·h),此时DNBF出水硝态氮平均为0.56 mg/L(平均去除率为96.94%)。
敬双怡 +5 more
doaj +2 more sources
Rare Metals, Volume 45, Issue 6, June 2026.ABSTRACT The development of structurally stable anodes with high capacities and long cycle lives is essential for the development of potassium–ion batteries. Conversion‐type anodes have attracted considerable attention in potassium–ion batteries (PIBs) due to their high theoretical capacities.
Jeong Ho Na +7 more
wiley +1 more source
Shuitu Baochi Xuebao, 2020 为研究土地利用和农业管理对流域非点源氮污染的影响，选择南水北调中线的重要水源地丹江流域作为研究区，应用SWAT模型模拟了流域地表水硝酸盐氮和氨氮负荷，揭示了土地利用变化和不同施肥灌溉措施对氮污染负荷的贡献。结果表明：（1）流域内全年氮污染分布不均，硝酸盐氮和氨氮污染较为严重的时段集中在每年7—9月，输出量分别为734.32，735.36 t，占全年硝酸盐氮和氨氮输出量的50%以上；（2） 硝酸盐氮和氨氮的输出量具有较大的空间差异，自上游至下游逐渐加重，污染较为严重的子流域主要集中在丹凤县和商南县；（3）
毕直磊 +4 more
doaj
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Driven by global energy transition and sustainability, sodium‐ion batteries (SIBs) have emerged as key alternatives to lithium‐ion batteries for low‐to‐medium energy storage, because of abundant sodium resources and low cost. However, their commercialization is hindered by the lack of anodes with high capacity, fast kinetics, and long‐term ...
Shuang‐Lin Cai +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Cost‐effective and efficient non‐noble‐metal catalysts for selective lignin hydrogenolysis remain elusive, representing a significant challenge in biorefinery. Here, we prepared a nitrogen‐doped carbon supported CoNi bimetallic catalyst, which was successfully derived from zeolitic imidazolate framework (ZIF) via high‐temperature pyrolysis ...
Xingwei Luo +3 more
wiley +1 more source
Gongye shui chuli, 2017 采用单级自养脱氮EGSB反应器处理质量浓度约为100 mg/L的低氨氮废水，考察了氮负荷和上升流速对反应器脱氮性能的影响。结果表明，逐步缩短HRT至2.0 h，且同步提高污泥区DO至0.32~0.36 mg/L，成功将反应器的氮负荷从100 mg/（L·d）提升至1 200 mg/（L·d），NH4+-N、TN平均去除率分别为93.0%和76.6%。反应器适宜的DO随氮负荷的提升而升高，对曝气量和上升流速的调控可实现对污泥区DO的精准控制。此外，EGSB较高的上升流速有利于保有较高生物量 ...
刘勇 +5 more
doaj +2 more sources