两段生化法在处理焦化和煤气混合污水中的应用

针对目前焦化污水处理中存在的问题以及焦化污水的特点，提出了强化预处理过程，增加后处理设施，采用两段曝气并延长曝气时间的设计方法，使处理水达标排放     

BAF对再生水处理的中试研究

BAF用于处理沈阳市北部污水处理厂的出水,当水力停留时间(HRT)为2.0 h,水力负荷为2m3/m2·h时,CODcr、NH3-N、SS等的去除率分别为60%、98%、92%,其水质指标完全满足电厂补给水的水质要求,同时具有较高的处理效率和抗冲击负荷能力.     

好氧颗粒污泥稳定性影响因素分析

在内循环气升式间歇反应器对好氧颗粒污泥颗粒化过程进行了研究,从污泥负荷率和碳源特性分析了好氧颗粒污泥的稳定性。以蔗糖为碳源时,反应器在较低的曝气量下生长有大量的丝状真菌,而在较高的曝气量下有利于污泥形成表面光滑的颗粒,但当污泥负荷过低时,光滑的颗粒污泥表面开始迅速生长丝状真菌而导致颗粒污泥不稳定。试验表明以蔗糖为碳源物质形成好氧颗粒污泥速率快,但其操作条件难控制,容易引起丝状真菌的大量生长;以乙酸钠为碳源物质,形成颗粒污泥速度慢,污泥颗粒化程度不高;而以蔗糖与乙酸钠为混合型碳源进行好氧颗粒污泥的培养证明了形成的好氧颗粒污泥表面光滑,没有丝状菌的存在,并且颗粒污泥易于稳定运行。     

采用ICEAS工艺进行瓦房店市污水处理厂设计

在调研的基础上，成功地应用ICEAS（Intermittent Cyclic Extended Activated Sludge)工艺进行瓦房店市污水处理厂设计。实践证明，该工艺占有占地面积小、处理效果好、工艺简单、运行稳定，对污水水质适应性强、耐冲击负荷、污泥龄长、污泥沉降性能好，剩余污泥少等优点。     

Nitrogen and phosphorus removal under intermittent aeration conditions

A practice wastewater treatment plant was operated using intermittent aeration activated sludge process to enhance biological nitrogen and phosphorus removal. When the influent concentrations of CODcr, BOD5, TN, TP, NH3-N, TKN, and SS varied in a range of 207.5-1640 mg/L, 61.8-637 mg/L, 28.5-75.6 mg/L, 4.38-20.2 mg/L, 13.6-31.9 mg/L, 28.5-75.6 mg/L, and 111-1208 mg/L, the effluent means were less than 50 mg/L, 20 mg/L, 5 mg/L, 1.0 mg/L, 5 mg/L, 10 mg/L, and 20 mg/L, respectively. Based on a long time of operating results, this process is very suitable for nutrient biological removal for treating the municipal wastewater those water characteristics are similar as that of the Songjiang Munieitml Waste Water Treatment Plant( SJMWTP).     

膜生物反应器短程硝化脱氮处理生活污水的研究

采用膜生物反应器处理模拟生活污水,研究了短程硝化生物脱氮的效果,试验结果表明:在中温(25～30℃),曝气量为0.15m3/h、pH值为7～8的条件下,COD去除率平均值为89.0%(最高达95.4%),出水氨氮在5.0mg/L以下(平均3.1mg/L),NO2-得到了富集,出水中基本监测不出NO3-,总氮去除率平均为86.2%(最高达94.0%),且系统对有机物与氮源的耐冲击负荷能力较好;曝气量和pH值是短硝化过程的重要影响因素。     

Surface waves and roughness in self-aerated supercritical flow

In high-velocity open channel flows, free-surface aeration is commonly observed. The effects of surface waves on the air–water flow properties are tested herein. The study simulates the air–water flow past a fixed-location phase-detection probe by introducing random fluctuations of the flow depth. The present model yields results that are close to experimental observations in terms of void fraction, bubble count rate and bubble/droplet chord size distributions. The results show that the surface waves have relatively little impact on the void fraction profiles, but that the bubble count rate profiles and the distributions of bubble and chord sizes are affected by the presence of surface waves.     

沉积物充气过程对锌的影响

在缺氧沉积物中,酸可挥发硫（ＡＶＳ）是总硫含量中的一个活性最大的部分。它控制着还原状态沉积物内孔隙水的重金属浓度又通过与重金属形成硫化物,影响着沉积物中重金属的形态。现已证明,ＡＶＳ与重金属反应是重要方面。ＡＶＳ的变化来自人类活动和自然现象。本项研究通过对香港河流和海湾沉积物３２ｄ的连续充气实验,探索硫含量变化对Ｚｎ对影响。     

纯氧曝气高MLSS浓度法的生产性探索

在处理乙烯生产废水的纯氧曝气活性污泥系统中，将曝气池ＭＬＳＳ浓度由５ｇ／Ｌ提高到１０－１５ｇ／Ｌ，从而使生化处理系统于高ＭＬＳＳ、低污泥负荷、低ＳＶＩ的良好运行状态，提高了装置的处理能力和耐负荷冲击能力，克服了污泥膨胀问题，保持了系统的稳定运行。     

FIELD TESTING OF AN ICE-PRESERVING WINTER LAKE AERATION SYSTEM1

ABSTRACT: Artificial aeration is used to prevent winter fish kills due to oxygen depletion in ice-covered lakes. Conventional aeration by air bubble plumes and other techniques usually mixes the water column and produces hazardous open water in the ice cover. A non-mixing winter lake aeration system which creates a fish refuge was designed and field tested to oxygenate the water and maintain water temperature stratification in a lake such that no open water is created. The system uses a cascade aerator and has a design discharge and dissolved oxygen input rate of 85 1/s and 70 kg/d, respectively. Aerated water is discharged near mid-depth with minimum disturbance of the ambient water through a specially designed diffuser. The system was tested in a shallow 3 m deep lake of 17 ha surface area during two winters and was found to perform as expected. Significant photosynthetic production of dissolved oxygen under the ice-cover was also observed during snow-free periods.