The Reuse of Urban and Industrial Waste in Tai-Lin-Pu Reclamation Project,Taiwan

Abstract

This study introduces the principles of KMG's (Kaoshiung Municipal Government) dealing with the non-poisonous urban and industrial waste through reclamation of shore land in reinforcing a sense of coastal protection and land development in Tai-Lin-Pu coastal area, southern Taiwan.

Through a series of experimental studies, we found that substitutes of coarse aggregate with a broad spectrum of integrating slag powder, fly ash, and cementitious material can be obtained with a benefit up to 80% saving of cement. the integrated aggregates from the non-poisonous industrial wastes were subsequently made into armour units and used in the field tests at Tai-Lin-Pu coastal area, where the shorelines are seriously eroded. After being subjected to several severe typhoon advents, the results showed that the waste-made units used as the protection breakwater, together with construction wastes and excavated soil as the filling material, prove to be an effective practice in utilizing recycled urban waste to reclaim erosive shore lands. Moreover, this study also demonstrates that through detailed analysis of the waste characteristics, scrap material could be turned into valuable construction aggregates, and highlights the value of non-poisonous urban and industrial waste as a alternative resource for the shore protection engineering.     

炉渣在锅炉湿法除尘废水处理中的应用

利用燃煤炉渣直接过滤处理锅炉湿法除尘废水 ,可以提高出水水质 ,对废水中 SS、CODcr和HSO4- 有显著去除效果 ,出水可以满足循环回用要求     

Effective removal of phosphorus from high phosphorus steel slag using carbonized rice husk

High phosphorus steel slag and carbonized rice husk are two common wastes characterized by high generation and low secondary use values.Through the reduction of high phosphorus steel slag by biomass,both wastes were fully utilized,thus reducing the negative impact on the environment.In this study,variables such as temperature,time,and amount of reactants were changed to determine the optimal conditions for the reaction of steel slag with carbonized rice husk at high temperatures.The actual amoun...     

Phosphate removal from domestic wastewater using thermally modified steel slag

This study was performed to investigate the removal of phosphate from domestic wastewater using a modified steel slag as the adsorbent. The adsorption effects of alkalinity, salt, water,and thermal modification were investigated. The results showed that thermal activation at 800℃ for 1 hr was the optimum operation to improve the adsorption capacity. The adsorption process of the thermally modified slag was well described by the Elovich kinetic model and the Langmuir isotherm model. The maximum adsorption capacity calculated from the Langmuir model reached 13.62 mg/g. Scanning electron microscopy indicated that the surface of the modified slag was cracked and that the texture became loose after heating. The surface area and pore volume did not change after thermal modification. In the treatment of domestic wastewater, the modified slag bed(35.5 kg) removed phosphate effectively and operated for 158 days until the effluent P rose above the limit concentration of 0.5 mg/L. The phosphate fractionation method, which is often applied in soil research, was used to analyze the phosphate adsorption behavior in the slag bed. The analysis revealed that the total contents of various Ca–P forms accounted for 81.4%–91.1%, i.e., Ca10–P 50.6%–65.1%, Ca8–P 17.8%–25.0%,and Ca2–P 4.66%–9.20%. The forms of Al–P, Fe–P, and O–P accounted for only 8.9%–18.6%. The formation of Ca10–P precipitates was considered to be the main mechanism of phosphate removal in the thermally modified slag bed.     

人工湿地不同填料组合去除典型污染物的研究

选取沸石、火山岩、空心砖、钢渣4种填料,通过对水中典型污染物的等温吸附试验,进行填料组合方式的优化配比.选取优化后的配比组合模拟人工湿地基质系统进行动态试验,进一步考察分析不同填料组合对污染物去除效果的差异.实验结果表明,Langmuir模型能够较好地模拟填料对氮、磷的吸附过程.各填料对NH+4-N的饱和吸附量大小为沸石(2388.92 mg·kg-1)空心砖(618.39 mg·kg-1)火山岩(310.84mg·kg-1);对磷的饱和吸附量大小为空心砖(3051.57 mg·kg-1)钢渣(2863.69 mg·kg-1)火山岩(1102.78 mg·kg-1)沸石(717.15mg·kg-1).在动态试验中,不同的填料组合对污染物具有不同的去除效果.综合考虑各填料组合对污染物的去除,选取效果最优的填料组合为ZH11(沸石与空心砖质量比1∶1混合),其对COD、NH+4-N、NO-3-N、TP的去除率分别达到62.40%、95.54%、59.82%和97.50%.     

高价值综合利用攀钢钛矿渣的途径─－利用提钛后残渣生产复合水泥与少熟料水泥

本文较系统地研究了提钛后的残渣、矿渣、熟料、激化剂等因素对复合水泥与少熟料水泥强度的影响；找出了利用提钛后的残渣生产复合水泥与少熟料水泥生产的最佳条件，并对复合水泥和少熟料水泥的性能进行了初步探索。试验数据表明，利用提钛后残渣可生产５２５￣＃复合水泥和４２５￣＃少熟料水泥，工业废渣利用率可达７０％。     

催化光度法测定中成药中痕量铬

研究了Cr（Ⅵ）催化H2O2氧化溴甲酚红（BR）的反应。在HAc-NaAc介质中，以溴化十六烷基吡啶（CPB）为增敏剂，测定波长为588nm，Cr(Ⅵ）浓度在0－0.06mg/L内与吸光度呈线性关系。该法用于中成药乌鸡白凤丸中铬含量的测定，结果令人满意。     

利用自养煤矸石砖技术治理铬渣初步研究

本研究通过焙烧试验 ,对利用自养煤矸石砖技术治理铬渣进行了初步研究。结果表明 ,在自养煤矸石砖的焙烧过程中 ,其中炭和自身热量能将铬渣中六价铬还原成 (三价铬 )。本研究确定了该铬渣治理方法工艺简单、成本低、解毒彻底、稳定性强 ,具有广泛的应用前景。     

转炉钢渣配烧水泥熟料及其试生产

转炉钢渣配烧水泥熟料,可降低能耗和成本,提高水泥产量和质量,具有显著的经济效益和环境效益.本文介绍了钢渣配烧水泥熟料的理论依据、生料制备、熟料煅烧和熟料分析检验,以及试生产情况.     

碱渣的综合利用发展状况研究

对国内外氨碱法生产的碱渣在建筑工程材料、土壤改良剂和烟气脱硫方面的应用进行了阐述，提出碱渣作为烟气脱硫剂有望成为研究的重点。