应用活性污泥表面曝气法处理制浆污水

介绍了南平造纸厂采用活性污泥表面曝气法处理制浆污水四年以来的运行状况,除COD_(cr)一项指标外,BOD_5、SS、pH均达到国家一级排放标准.指出了运行中存在和需改进的问题.     

Preparation of floating BiOCl0.6I0.4/ZnO photocatalyst and its inactivation of Microcystis aeruginosa under visible light

Frequent occurrence of harmful algal blooms has already threatened aquatic life and human health. In the present study, floating BiOCl_0.6I_0.4/ZnO photocatalyst was synthesized in situ by water bath method, and and applied in inactivation of Microcystis aeruginosa under visible light. The composition, morphology, chemical states, optical properties of the photocatalyst were also characterized. The results showed that BiOCl_0.6I_0.4 exhibited laminated nanosheet structure with regular shape, and the light response range of the composite BZ/EP-3 (BiOCl_0.6I_0.4/ZnO/EP-3) was tuned from 582 to 638 nm. The results of photocatalytic experiments indicated that BZ/EP-3 composite had stronger photocatalytic activity than a single BiOCl_0.6I_0.4 and ZnO, and the removal rate of chlorophyll a was 89.28% after 6 hr of photocatalytic reaction. The photosynthetic system was destroyed and cell membrane of algae ruptured under photocatalysis, resulting in the decrease of phycobiliprotein components and the release of a large number of ions (K⁺, Ca²⁺ and Mg²⁺). Furthermore, active species trapping experiment determined that holes (h⁺) and superoxide radicals (·O₂⁻) were the main active substance for the inactivation of algae, and the p-n mechanism of photocatalyst was proposed. Overall, BZ/EP-3 showed excellent algal removal ability under visible light, providing fundamental theories for practical algae pollution control.     

微絮凝-纤维过滤法去除二级出水中磷的试验研究

采用微絮凝纤维过滤法对二级出水进行深度处理,对影响磷去除效率的几种因素作了分析。研究结果表明,采用微絮凝-纤维过滤可对磷进行有效去除,能够满城市污水再生高级回用对磷指标的要求。     

浅谈SBR污水处理技术的进展

综述了SBR法曝气、脱氮除磷的研究进展，归纳了经典及新型SBR工艺的特点，SBR法的发展前途。     

焚烧炉气相燃烧工况条件优化的分析与计算

对固体废弃物焚烧过程进行了简要分析，认为设计好气相燃烧工况，使挥发性组分完全燃烧，是控制主要有害有机组分的破坏去除率的关键。计算了（１）在动力控制条件下，不同温度时的多种有机物ＤＲＥ达９９．９９％所需的时间；（２）在扩散控制条件下，不同粒径固体废弃物的不同分析量挥发性组分完全燃烧所需的时间。讨论了炉内温度，气体在炉内停留时间，氧浓度等因素至ＤＲＥ的影响。     

矿区含氡深井水作饮用水氡污染治理的试验研究

矿区含氡深井水通过实验室小规模除氡试验。结果表明：敞口贮存，曝气和活性炭吸附是除氡的三种有效方法。本文对试验各种过程和结果进行分析讨论。     

间歇式活性污泥除磷的试验研究

间歇式活性污泥法除磷的试验研究表明，生物除磷需要一定的厌氧条件，且须在厌氧阶段后进行充足的曝气。间歇式活性污泥法的灵活性非常适合生物除磷的环境条件。厌氧与好氧相结合，能够提高磷的去除率或降低出水磷的浓度     

垃圾焚烧烟气中氯化氢的干法去除研究

采用干态固定床实验装置系统，研究去除垃圾焚烧炉烟气中HCl气体的主要影响因素及其规律。结果表明：选择适当的摩尔比α和颗粒度较细小的吸收剂，吸收效率和吸收剂利用率会提高；温度对净化效率影响不大；HCl气体浓度（ρHCl）对吸收剂的吸收效率（ηHCl）显著影响，ρHCl升高，则ηHCl增大；含有少量杂质的工业碱性废渣的利用率要大于纯化学试剂吸收剂；HCl气体排放标准在75mg／m^3时，可采用干法去除垃圾焚烧炉烟气中的HCl气体。     

Study of control strategy and simulation in anoxic-oxic nitrogen removal process

The control strategy and simulation of external carbon addition were specially studied in an anoxic-oxic(A/O) process with low carbon: nitrogen(C/N) domestic wastewater. The control strategy aimed to adjust the flow rate of external carbon dosage to the anoxic zone, thus the concentration of nitrate plus nitrite(NOx^- -N) in the anoxic zone was kept closed to the set point. The relationship was studied between the NOx^- -N concentration in the anoxic zone(SNo) and the dosage of external carbon, and the results showed that the removal efficiency of the total nitrogen(TN) could not be largely improved by double dosage of carbon source when SNO reached about 2 mg/L. Through keeping SNO at the level of about 2 mg/L, the demand of effluent quality could be met and the carbon dosage could be optimized. Based on the Activated Sludge Model No. 1 (ASM No. 1), a simplified mathematical model of external carbon dosage was developed, Simulation results showed that PI controller and feed-forward PI controller both had good dynamic response and steady precision. And feed-forward PI controller had better control effects due to its consideration of influent disturbances.     

膜-生物反应器处理高浓度生活污水的中试研究

通过对膜 生物反应器处理高浓度生活污水的中试试验进行了系统的研究 ,测定了试验条件下的膜 生物反应器对生活污水中各种污染物的去除效果