Results 1 to 10 of about 16,123 (46)
Gongye shui chuli, 2006 中国饮用水源水污染日益严重，传统净水工艺面临新问题。通过对中国微污染水源水处理技术的分析，探讨了预处理技术、强化混凝处理技术、膜法深度处理技术、氧化偶合絮凝处理新技术的作用效果与机理，阐述了微污染水源水处理的重要性，展望了我国饮用水源水处理发展趋势。
潘碌亭
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Shuitu Baochi Xuebao, 2007 为了研究水分胁迫处理对水稻生长及产量的影响,采用盆栽试验方法,在水稻分蘖期、孕穗期、开花期和灌浆期进行水分胁迫处理,设3个处理水平,处理H 1土壤水势为0（土壤饱和含水量90%-100%）,处理H2土壤水势-30 kPa,处理H3土壤水势-50 kPa,保水层作对照（CK）。结果表明,分蘖期水分胁迫影响水稻分蘖数、LA I和株高,导致单位面积有效穗数不足而严重影响产量,处理平均产量比对照低29.5%;孕穗期水分胁迫影响水稻库容的建立,穗小、穗粒数少、千粒重低而严重影响产量,处理平均有效穗数比对照少26 ...
邵玺文 +5 more
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Gongye shui chuli, 2006 基于聚醚多元醇(PPG)废水的生化特性及处理试验，在工程设计中采用预处理+生化处理+混合生化处理的新工艺处理聚醚多元醇废水。工程运行结果表明，聚醚多元醇废水经过水质分流，将高浓度PPG废水单独处理后，再与低浓度生活污水等混合处理，综合排水达到GB8978—1996的二级标准。本工程为此类废水的处理开拓了一种新的思路。
李品娟, 杨建琪, 谭中侠
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Genomics‐informed management of ex situ populations
Conservation Biology, EarlyView.Abstract The European Association of Zoos and Aquariums (EAZA) manages insurance populations for hundreds of species through its EAZA ex situ programs (EEPs). EEPs help safeguard against extinction in the wild and provide source populations for genetic rescue programs.
Cock van Oosterhout +8 more
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Gongye shui chuli, 2015 以晋江市仙石污水处理厂改造工程为例, 对污水处理厂改造工程的设计进行了分析, 保留已建工程的初级处理及二级处理单元, 增设深度处理单元及旁路除磷单元, 并对污泥处理系统进行升级。深度处理采用滤布滤池工艺, 污泥处理工艺采用浓缩脱水工艺并增设旁路化学除磷。污水处理厂改造完成后, 其尾水水质满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。
钟启俊
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World Food Policy, Volume 12, Issue 2, November 2026.ABSTRACT Agricultural development initiatives in sub‐Saharan Africa have emphasized improved crop varieties as a pathway to food security, resilience, and rural poverty reduction. However, empirical evidence often focuses narrowly on plot‐level outcomes and overlooks whole‐farm effects and the substantial heterogeneity in farmers' management practices,
Kodjo Kondo +4 more
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Gongye shui chuli, 2004 东辛油田辛一污水处理站因污水处理设施老化，所加药剂与水质的配伍性较差，使回注于地层的污水水质不达标。作者较详细地介绍了辛一污水处理站通过改造污水处理流程，利用流程中沉降、过滤技术，优选污水处理剂，使处理后的污水水质有明显的改善，回注污水水质达标。
黄敏 +4 more
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World Water Policy, Volume 12, Issue 4, November 2026.ABSTRACT Biochemical oxygen demand (BOD) remains a core indicator of organic pollution in freshwater monitoring, but its role in water policy and practice is changing as water‐quality assessment moves toward predictive, integrative, and decision‐support approaches.
Isadora Favero Roque Cenci +5 more
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Gongye shui chuli, 2020 介绍了某煤制天然气项目废水处理工艺现状、存在问题及优化改造建议。该项目废水中难降解有机污染物浓度高，处置困难，当前采用的处理工艺包括主生化、深度处理和回用工艺。深度处理系统出水水质差和膜装置处理能力不足是制约当前系统运行效果的重要因素。建议通过新增臭氧催化氧化工艺改善深度处理段出水水质，同时对膜装置扩容提升废水处理能力，通过以上措施可有效地从水质和水量角度改善当前废水处理系统的处理效果。
程瀚洋 +5 more
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Policy Studies Journal, Volume 54, Issue 4, November 2026.ABSTRACT This paper examines how governments navigate policy legitimacy during crises through three distinct discursive processes: legitimization, delegitimization, and blame avoidance. Using a sequential mixed‐methods design, the study analyzes Denmark's decision to cull all mink during the COVID‐19 pandemic. The quantitative analysis of 947 newspaper
Olivier Rubin +3 more
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