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Search Results: 1 - 10 of 17 matches for " 方士 "
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高氨氮味精废水的亚硝化/反亚硝化脱氮研究
方士,李筱焕
环境科学学报 , 2001,
Abstract: 两段SBR法处理经稀释的味精废水有良好的有机质降解和脱氮效果.整个生物处理过程可分为碳氧化阶段和三个亚硝化/反亚硝化阶段.碳氧化阶段主要是有机质的降解和曝气吹脱除氮,随后通过亚硝化/反亚硝化反应实现生物脱氮和有机物的降解.SBRⅠ碳氧化阶段废水中有机质浓度较高,在降解过程中消耗废水中的溶解氧,竞争性抑制了亚硝化反应的发生.而亚硝化/反亚硝化反应的形成是由于游离氨(FA)对硝酸细菌的抑制而形成的.
管道厌氧消化器反应过程模型的研究
方士,徐向阳,冯孝善
生物工程学报 , 1987,
Abstract: 管道厌氧消化器是一种由若干管节横向串联组装而成的新型厌氧消化工艺。本文在分析管道厌氧消化器的流动状态和基质降解动力学的基础上,建立了管道厌氧消化器反应过程模型——离散模型。用实验值作了模型参数估值。模型模拟管道厌氧消化器过程结果表明,模型计算值与实验值拟合良好,误差为7%左右,模型用作预测,其结果是可信的。
泥炭生物滤塔处理低浓度H2S气体的试验研究
殷峻,方士,陈英旭
环境科学学报 , 2003,
Abstract: 研究了泥炭生物滤塔处理含低浓度H2S恶臭气体的技术.实验考察并研究了气体停留时间和H2S进气负荷对H2S去除率的影响,生物滤塔的抗冲击负荷能力以及生物降解宏观动力学.结果表明,当停留时间为25—30s时,进气浓度为3—70mg/m3,去除率达到99%以上,且具有较强的抗冲击负荷.
管道厌氧消化器反应过程模型的研究
方士 徐向阳 冯孝善
生物工程学报 , 1987,
Abstract: 管道厌氧消化器是一种由若干管节横向串联组装而成的新型厌氧消化工艺。本文在分析管道厌氧消化器的流动状态和基质降解动力学的基础上,建立了管道厌氧消化器反应过程模型——离散模型。用实验值作了模型参数估值。模型模拟管道厌氧消化器过程结果表明,模型计算值与实验值拟合良好,误差为7%左右,模型用作预测,其结果是可信的。
生物塔外曝气法去除沼气中H2S的研究
方士,陈国喜,吴玉祥,冯孝善
浙江大学学报(农业与生命科学版) , 2000,
Abstract: 研究了利用反应塔外暴气、介质循环供氧处理沼气中的H2S的新方法,结果表明:一定成份的硫代硫酸钠培养液可以富集培养出效果良好的脱硫污泥,在反应器中脱硫污泥可以高产地去除H2S,当进气H2S浓度为1.1g/m^3,进气量为0.34L/min时,去除率可达98.6%,H2S最大负荷为15.9mmol.L^-1.d^-1,系统运行的最佳酸度为PH1.9-2.0,尾气中残留氧的浓度不超过0.56g/m^3。
A study on treatment of MG wastewater with process of adsorption and flocculation and two-stage SBR
吸附混凝-两段SBR法工艺处理味精废水的研究

FANG Si,LI Xiaohuan,
方士
,李筱焕

浙江大学学报(农业与生命科学版) , 2001,
Abstract: A pilot study on Monosodium Glutamate (MG) wastewater treatmentwas conducted using adsorption and flocculation followed by two-stage Sequencing Batch Reactor (SBR). In pretreatment of MG wastewater, best removal efficiency was reached by adding bentonite (1.6 g/L) as adsorbent and sodium polyacrylate (100 mg/kg) as coagulant. the removal rates were 55%-65% for CODcr and 85%-94% for SS under the condition of 40 ℃,pH 3.0. The removal efficiency of CODcr and SS were 94%-96% and 82%-93% respectively by using two-stage SBR in steady stage.
A study on removing nitrogen from highly nitrogenous MG wastewater with process of shortened nitrification/denitrification
高氨氮味精废水的亚硝化/反亚硝化脱氮研究

FANG Shi,LI Xiaohuan,
方士
,李筱焕

环境科学学报 , 2001,
Abstract: The dilute N rich monosodium glutamate(MG)wastewater was treated by two stage SBR process.The process can be divided into carbon oxidation stage and three shortened nitrification/denitrification stages.The pathway of nitrogen removal from N rich MG wastewater was proved to be via stripping with carbon oxidation stage and shortened nitrification/denitrification subsequently.In the carbon oxidation stage,DO was consumed by high concentrations of organic compound so that nitrification was repressed,Inhibition of nitrite oxidation by free ammonia(FA)resulted in the formation of shortened nitrification/denitrification process.
基于正则化网络-遗传算法的属性筛选及其在化学模式识别中的应用
束志恒,方士,陈德钊,陈亚秋
分析化学 , 2003,
Abstract: 采用贝叶斯正则化方法训练,以得到推广性优良的神经网络,并提出启发性的遗传算法.通过灵敏度分析对正则化网络实施剪枝,从而在高维模式中筛选出能代表其分类特性的最小最优属性特征子集.此方法应用于高维留兰香模式的属性筛选与模式分类,效果良好,明显优于其它方法.
厌氧附着膜膨胀床(AAFEB)反应器处理啤酒糖化废水的研究
郑平,俞秀娥,方士,冯孝善
环境科学 , 1989,
Abstract: 从模拟废水研究证明,厌氧附着膜膨胀床(AAFEB)工艺是一种效率高、适用性广的新型有机废水处理工艺,但要付诸应用,还需试验其处理实际有机废水的效能。
Research of treatment of landfill leachate thro ugh two-stage SBRs following absorption and coagulation with PAC
两级SBR-PAC吸附混凝法处理垃圾渗滤液的研究

FANG Si,LU Hang,LAN Xue chun,
方士
,卢航,蓝雪春

浙江大学学报(农业与生命科学版) , 2002,
Abstract: Treatment of landfill leachate is a focus of researcher's attention as well as a difficult problem in field of wastewater treatment. The landfill leachate(COD Cr 1500 4500 mg/L,NH 4 + N 795 1550 mg/L,pH 8.0 9.0) from a garbage landfill disposal plant in Hangzhou was handled by recycle and two stage SBR with absorption and coagulation of PAC as a post treatment. The effluent COD Cr concentration was less than 300 mg/L and NH 4 + N concentration was less than 20 mg/L.
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