垃圾渗滤液微生物循环接种强化堆肥碳素和氮素迁移

以城市生活垃圾为堆肥原料,进行了20d的垃圾渗滤液微生物循环接种强化堆肥试验,堆肥过程中采用时间温度反馈来控制通风量,力图通过测定堆肥体系中碳素以及凯氏氮、氨氮、硝态氮含量的动态分布,分析碳素和氮素的迁移转化规律。试验结果表明:采用垃圾渗出液微生物循环接种强化技术的堆肥体系接种组温度可维持在较高水平,pH可稳定在7.0左右,有机质降解加快,对碳素和氮素的形态分析表明:对照组总有机碳和碳氮比波动较大,而接种组下降趋势更为明显,高温条件下的氨气挥发是导致氮素损失的主要原因。     

垃圾渗滤液微生物循环接种强化堆肥碳素和氮素迁移

以城市生活垃圾为堆肥原料,进行了20d的垃圾渗滤液微生物循环接种强化堆肥试验,堆肥过程中采用时间温度反馈来控制通风量,力图通过测定堆肥体系中碳素以及凯氏氮、氨氮、硝态氮含量的动态分布,分析碳素和氮素的迁移转化规律.试验结果表明:采用垃圾渗出液微生物循环接种强化技术的堆肥体系接种组温度可维持在较高水平,pH可稳定在7.0左右,有机质降解加快,对碳素和氮素的形态分析表明:对照组总有机碳和碳氮比波动较大,而接种组下降趋势更为明显,高温条件下的氨气挥发是导致氮素损失的主要原因.     

接种硝化菌剂降低猪粪堆肥氮素损失的研究

[目的]降低猪粪堆肥中由于NH<,3>释放造成的氮素损失,为堆肥反应确定初始条件、工艺优化提供理论依据.[方法]用猪粪与粉碎的稻草按比例混合堆肥,用接种硝化菌剂方法研究猪粪堆肥的固氮效果.[结果]通过试验,确定最佳工艺条件为:硝化菌剂接种量为3%,初始pH为7.0,初始含水量为65%,前半周期的通气量为150 L/min,后半周期的通气量为100 L/min.[结论]堆肥前期NH<,3>释放量的控制是氮素损失控制的关键.在适宜的工艺条件下,堆肥腐熟后的TN损失率为31.8%,氮素物质损失率降低幅度明显.     

煤灰渣对垃圾堆肥温度影响的研究

煤灰渣对垃圾堆肥温度的影响实验结果表明，煤灰渣的含量对垃圾堆肥过程的温度有明显影响，建议垃圾堆肥原料中煤灰渣的参考量为４０％～６０％。     

污泥堆肥应用于废弃金属矿山表土基质改良的研究

利用城镇污水处理厂污泥好氧堆肥产物与废弃矿山表土进行掺混开展盆栽试验，通过对土壤基本理化性质、植物生长情况、土壤酶活性以及微生物含量的分析，研究了城镇污水厂污泥应用于矿山表土改良的可行性。结果显示，在20%的污泥堆肥掺混比例下，与原废弃矿山表土相比，有机质含量提升了4.4倍，土壤全氮含量提升了9.5倍。因此，污泥堆肥可以显著的提升矿山表土的肥力，有效地改善土壤微生物数量与酶的活性，促进植物的生长和生态恢复。     

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％。     

东乡普通野生稻根际微生物群落特征研究

[目的]研究东乡普通野生稻(Oryza rifipogon Griff.)根际微生物群落特征.[方法]采用氯仿熏蒸浸提法测定根系微生物生物量碳、氮;采用平板稀释培养法测定群落组成;采用最大或然计数法测定微生物生理群.[结果]东乡野生稻根际微生物生物量碳、氮平均值分别为83.02和16.98mg/kg(土),较普通栽培稻低;根际可培养微生物中细菌>放线菌>真菌;氮素生理群中氨化细菌>好氧固氮菌>反硝化细菌>嫌气性固氮菌>硝化细菌>亚硝化细菌.[结论]东乡野生稻根际微生物群落组成与普通栽培稻相比有差异.     

生物垃圾堆肥的影响因素及反应动力学研究

[目的]为有效控制生活垃圾堆肥过程、提高堆肥效率提供理论依据.[方法]利用堆肥反应动力学,以含水率、堆料颗粒大小、压实度、通气量作为研究对象,建立动力学模型,通过堆肥一次发酵试验,研究舍水率、颗粒度、压实度、通风量时生活垃圾堆肥过程中有机物降解及堆肥反应速率的影响.[结果]当含水率为65%,堆料颗粒大小为8 cm,压实度0.247 kg/L,通气量25 m<'3>/(h·t)时堆肥反应速率较大.[结论]生活垃圾堆肥反应符合一级反应动力学.     

正交试验优化发酵中氨气释放条件的研究

[目的]为降低发酵过程中氨气释放及氮素损失,在室内条件下对城市生活垃圾进行好氧发酵研究.[方法]利用正交试验设计研究初始条件对发酵过程中氨气释放的影响,优化发酵过程氨气释放条件.[结果]正交试验结果表明,初始C/N和环境温度对氨气释放影响最为显著;最佳发酵工艺参数组合为:含水率60%,C/N为40:1,pH值7.0, 温度25℃.[结论]该研究为降低发酵过程氮的损失、减少空气污染提供了理论依据.     

陈腐垃圾填埋场腐殖土好氧堆肥-浸提技术工艺研究

以某生活垃圾填埋场腐殖土为研究对象,采用好氧堆肥-浸提技术进行腐殖土中可溶性盐类、有机质、重金属的有效处理,探究不同C/N比、微生物菌液添加量、浸提剂添加比例、浸提时间下腐殖土的处理效果,确定最优的好氧堆肥-浸提技术工艺条件。结果表明:调节腐殖土中C/N为25∶1后,添加45 L微生物菌液,保持好氧堆肥条件后,以1∶1体积比添加浸提剂,浸提8 h,反复两次后,再用清水浸提一次,处理后腐殖土能满足《绿化种植土壤》(CJ/T 340-2016)标准。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

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.