不同改性剂改善填埋污泥臭度的实验研究

未经生物稳定化的污泥处置于填埋场时存在着恶臭污染的问题,从废物利用、以废治废的宗旨出发,选用粉煤灰、矿化垃圾和建筑垃圾三种改性剂并以泥土为对照,与污泥混合,可有效地降低污泥的臭度,对污泥臭度的改善能力由强到弱的顺序是粉煤灰、矿化垃圾、建筑垃圾和泥土.其中矿化垃圾具有易于就地取材,数量充足,不额外占用填埋空间的优点,将污泥处置于已有垃圾填埋场时,可优先考虑矿化垃圾与污泥混合填埋的方法,矿化垃圾混合比例的增大,有利于改性污泥的臭度降低,但污泥臭气中硫化氢浓度的降低幅度越来越小,添加量为7:10时,硫化氢的去除率达96%,按满足填埋强度要求的最低混合比例添加四种改性剂后,污泥的臭度降低到三级以下,符合填埋场恶臭污染物排放标准.     

不同改性剂改善填埋污泥臭度的实验研究

未经生物稳定化的污泥处置于填埋场时存在着恶臭污染的问题,从废物利用、以废治废的宗旨出发,选用粉煤灰、矿化垃圾和建筑垃圾三种改性剂并以泥土为对照,与污泥混合,可有效地降低污泥的臭度,对污泥臭度的改善能力由强到弱的顺序是粉煤灰、矿化垃圾、建筑垃圾和泥土。其中矿化垃圾具有易于就地取材,数量充足,不额外占用填埋空间的优点,将污泥处置于已有垃圾填埋场时,可优先考虑矿化垃圾与污泥混合填埋的方法,矿化垃圾混合比例的增大,有利于改性污泥的臭度降低,但污泥臭气中硫化氢浓度的降低幅度越来越小,添加量为7:10时,硫化氢的去除率达96%,按满足填埋强度要求的最低混合比例添加四种改性剂后,污泥的臭度降低到三级以下,符合填埋场恶臭污染物排放标准。     

城市污泥处理处置技术研究

通过对几种污泥处理处置技术的经济效益等作比较,并结合我国国情指出:污泥卫生填埋技术以其投资较少、容量大、见效快等优点应作为当前我国污泥处理处置的首选;而经济、高效的污泥改性剂的研发也为污泥卫生填埋技术的使用和推广奠定了基础、提供了条件;并进一步指出:由于污泥卫生填埋场常有大量填埋气产生,为避免安全事故的发生,在兼顾环境和经济效益条件下,对污泥填埋气收集系统进行优化设计应作为今后污泥卫生填埋研究的一个重要研究课题。     

矿化垃圾作用下餐厨垃圾厌氧发酵产氢试验研究

采用添加填埋10年的矿化垃圾对餐厨垃圾厌氧发酵产氢过程的影响进行了两批试验。第一批试验主要初步探讨矿化垃圾接种量对餐厨垃圾产氢影响，此批试验结果表明：添加矿化垃圾可以提高餐厨垃圾产氢浓度（由24％提高到30％）；第二批试验是研究矿化垃圾和污泥联合作用对餐厨垃圾厌氧发酵产氢的影响，实验结果表明：添加矿化垃圾后餐厨垃圾厌氧产氢的比氢气产率升高，从60mL／gVS提高到102mL／gVS，最大氢气浓度从33％提高到37％。     

矿化垃圾作用下餐厨垃圾厌氧发酵产氢试验研究

采用添加填埋10年的矿化垃圾对餐厨垃圾厌氧发酵产氢过程的影响进行了两批试验。第一批试验主要初步探讨矿化垃圾接种量对餐厨垃圾产氢影响,此批试验结果表明:添加矿化垃圾可以提高餐厨垃圾产氢浓度(由24%提高到30%);第二批试验是研究矿化垃圾和污泥联合作用对餐厨垃圾厌氧发酵产氢的影响,实验结果表明:添加矿化垃圾后餐厨垃圾厌氧产氢的比氢气产率升高,从60mL/gVS提高到102mL/gVS,最大氢气浓度从33%提高到37%。     

矿化垃圾作用下餐厨垃圾厌氧发酵产氢试验研究

采用添加填埋10年的矿化垃圾对餐厨垃圾厌氧发酵产氢过程的影响进行了两批试验.第一批试验主要初步探讨矿化垃圾接种量对餐厨垃圾产氢影响,此批试验结果表明:添加矿化垃圾可以提高餐厨垃圾产氢浓度(由24%提高到30%);第二批试验是研究矿化垃圾和污泥联合作用对餐厨垃圾厌氧发酵产氢的影响,实验结果表明:添加矿化垃圾后餐厨垃圾厌氧产氢的比氢气产率升高,从60mL/gVS提高到102mL/gVS,最大氢气浓度从33%提高到37%.     

强化准好氧填埋自然通风的原理及新途径研究

基于自然通风和准好氧填埋的基本理论，提出了几种强化准好氧填埋中自然通风效果的途径。实验结果表明，应用了吸风罩和风帽的改良型准好氧填埋可将填埋龄为2a的垃圾生物降解度（BDM）在200d左右的时间里由填埋初期的15．27％降到4．42％，衰减率为71．05％，大大缩短了垃圾降解的时间，加快了填埋场的稳定化进程。此外还发现，风速对改良型准好氧填埋方法的进风量影响显著，风速越大，甲烷的排放浓度降低幅度越大。     

危险废物焚烧项目烟气脱酸经济与技术分析

以江苏省某危废焚烧处置项目为例,对比分析危险废物焚烧后产生的烟气采用"干法小苏打+湿法脱酸"和"干法消石灰+湿法脱酸"的运行总成本.经济与技术分析结果表明:消石灰脱酸产生的飞灰进刚性填埋场填埋时,"干法小苏打+湿法脱酸"的总运行成本低;而消石灰脱酸产生的飞灰进柔性填埋场填埋时,"干法消石灰+湿法脱酸"的总运行成本低.     

含油污泥研究现状及发展方向

作为一种典型的危废,含油污泥的处理处置较为困难。对其性质分析发现:油田和炼油厂含油污泥的性质差异较大,其选择的工艺也有较大的不同。油田含油污泥需先高效回收油,其中调制-机械分离、溶剂萃取、热化学洗涤等较为成熟,除油率达90%以上,但后续需配套卫生填埋或焚烧等安全处置,而超临界水、水热液化等则能实现油水分离及污染物的最终矿化,但实际应用中需深入研究。而炼油污泥则需在废油回收的基础上,实现源头减量化。     

罗河简易生活垃圾填埋场封场设计

罗河简易生活垃圾填埋场封场设计，分别对封场总体方案设计中终场覆盖、垃圾防护主坝、排洪设施、填埋气导排及处理系统的结构选择进行了探讨，并结合具体情况进行了优化设计，最大限度地减少垃圾填埋场对周围环境的影响，节省投资。     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.