共查询到18条相似文献,搜索用时 406 毫秒
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依据番茄的营养特点及需肥量确定基本配方,以寿光大棚土壤供肥力、有机肥施用水平、施肥方法及造纸污泥对土壤养分的作用等为主要校正因素,制定大棚番茄专用肥最佳养分配比以及利用造纸污泥生产番茄专用肥的原料配伍、处理方法及工艺技术要点。造纸污泥大棚番茄专用肥在大棚番茄上的肥效试验表明:造纸污泥大棚番茄专用肥产量较同含量复合肥提高8.29%,施用后,土壤容重降低,有机质以及速效氮磷养分都有不同程度的提高。利用造纸污泥堆肥制成针对性强、养分全面均衡、有效养分利用率高的增产效果明显的作物专用肥料产品,可提升造纸污泥农业资源化利用价值。 相似文献
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随着废纸纤维原料短缺以及环保压力增大,利用废水处理的污泥替代纤维作为造纸原料成为很多企业的一种选择,不仅能降低污泥的排放量从而减轻环保压力,又能极大的降低生产成本。但污泥含有大量的无机颗粒和细小纤维,它的回用会给造纸生产带来很多负面问题,比如留着率低、脱水困难、纸张强度低等。本试验尝试通过对污泥进行预处理,从而解决因污泥回用对造纸生产带来的负面影响。 相似文献
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造纸污泥好氧堆肥处理技术研究 总被引:23,自引:3,他引:23
造纸污泥是一种生物固体废弃物,通过调节水分与C/N比,在强制通风与定期翻堆情况下,由于微生物作用,有机质发生降解,C/N比在不断下降,经过2个月左右高温堆肥,可以转化为高效的有机肥料。从堆肥过程的物理、化学及生物学指标变化可以看出,添加富含纤维素降解菌的发酵料,可以加速造纸污泥的腐熟,堆肥的阳离子交换量(CEC)与盆栽玉米增产率之间具有较好的相关性,CEC值可以作为造纸污泥堆肥腐熟程度的控制指标,CEC值≥80mmol/100g时,认为造纸污泥堆肥已经腐熟。 相似文献
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造纸污泥堆肥应用中重金属的累积行为 总被引:2,自引:0,他引:2
造纸污泥经过交替好氧厌氧堆肥处理后施加到菜园土中,进行了盆栽实验.实验结果表明,造纸污泥堆肥作为农业肥料,可以增加作物的生物量,提高土壤的养分含量,有效改良土壤的物理性状:土壤中的重金属在作物中的累积行为呈现不同的规律,但最后均趋于一个极值;重金属生物累积的峰值均低于国家蔬菜重金属含量标准. 相似文献
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氮营养水平对植烟土壤养分含量及土壤酶活性的影响 总被引:9,自引:0,他引:9
田间试验研究了植烟土壤不同土层养分含量及土壤酶活性的变化规律。结果表明:在同一氮水平条件下,随着土层深度的增加,土壤有机质、全氮、速效氮、速效磷、速效钾以及土壤脲酶,蛋白酶,转化酶活性均呈降低趋势,通过方差分析可知,各处理间差异达到5%显著水平;0~40 cm土层范围内,随着施氮量的增加,土壤有机质、全氮、速效氮含量也增加,土壤脲酶活性增加,而蛋白酶活性呈降低趋势,转化酶活性呈先增加后降低的趋势,且在该土层范围内,酶与土壤养分之间存在显著或极显著的相关关系;60~80 cm土层范围内,氮对土壤养分及土壤酶的影响能力相对降低。以上说明在植烟土壤-土壤养分-土壤酶相互作用的系统中,土壤养分含量和土壤酶活性明显受氮营养水平和土层深度的共同影响。 相似文献
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The use of sludge fermentative short-chain fatty acids (SCFA) as an additional carbon source of biological nutrient removal (BNR) has drawn much attention recently as it can reuse sludge organics, reduce waste activated sludge production, and improve BNR performance. Our previous laboratory study had shown that the SCFA production was significantly enhanced by controlling sludge fermentation at pH 10 with NaOH. This paper focused on a pilot-scale study of alkaline fermentation of waste activated sludge, separation of the fermentation liquid from the alkaline fermentation system, and application of the fermentation liquid to improve municipal biological nitrogen and phosphorus removal. NaOH and Ca(OH)(2) were used respectively to adjust the alkaline fermentation pH, and their effects on sludge fermentation and fermentation liquid separation were compared. The results showed that the use of Ca(OH)(2) had almost the same effect on SCFA production improvement and sludge volatile suspended solids reduction as that of NaOH, but it exhibited better sludge dewatering, lower chemical costs, and higher fermentation liquid recovery efficiency. When the fermentation liquids, adjusted with Ca(OH)(2) and NaOH respectively, were added continuously to an anaerobic-anoxic-aerobic municipal wastewater BNR system, both the nitrogen and phosphorus removals, compared with the control, were improved to the same levels. This was attributed to the increase of not only influent COD but also denitrifying phosphorus removal capability. It seems that the use of Ca(OH)(2) to control sludge fermentation at pH 10 for efficiently producing a carbon source for BNR is feasible. 相似文献
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该文以泸州老窖股份有限公司产生的污泥和酒糟为原料,研究高温发酵生产有机肥技术及对高粱的肥效。结果表明,污泥、酒糟、腐熟剂按不同比例混合堆肥,历经升温期,高温期和降温期,水分含量持续降低,氮、磷、钾和腐殖酸含量逐渐增加,堆肥物料由黄褐色变为褐色、黑褐色或黑色。其中,酒糟与污泥按2∶1(C∶N≈25∶1,水分质量分数为65%,pH 6.5)混合腐熟最快,肥质最佳,符合NY525—2012有机肥质量标准。50%有机肥与50%的化肥配施(以氮计),高粱产量、籽粒含氮量和植株磷钾吸收量分别比单施等养分的化肥增加12.55%、36.70%、22.22%和29.20%;土壤有效氮,磷酸酶、脲酶和脱氢酶活性也显著提高。因此,污泥和酒糟适量混合,添加菌剂,经高温发酵生产的有机肥符合国家标准,与化肥适量配施显著增加高粱产量,改善植物营养,提高土壤酶活。 相似文献
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研究了海滨中度盐土条件下海滨锦葵的干物质积累、养分吸收与产量的关系。结果表明,海滨锦葵各生育期的干物质积累量大小依次为灌浆期〉成熟期〉开花期〉现蕾期〉苗期。氮磷钾的吸收量在整个生育期遵循"慢-快-慢"的规律,吸收速率呈现先升后降的趋势,最高峰出现在灌浆期。整个生育期海滨锦葵对氮、磷的吸收量是果〉叶〉茎,对钾的吸收量是果〉茎〉叶。在海滨盐土中等盐分土壤(0.4%~0.5%)上种植海滨锦葵,每生产100kg籽粒需氮8.5kg、磷1.0kg、钾5.3kg,氮磷钾吸肥比例为1∶0.1∶0.6。 相似文献
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Using sludge fermentation liquid to improve wastewater short-cut nitrification-denitrification and denitrifying phosphorus removal via nitrite 总被引:4,自引:0,他引:4
Wastewater biological nutrient removal (BNR) by short-cut nitrification-denitrification (SCND) and denitrifying phosphorus removal via nitrite (DPRN) has several advantages, such as organic carbon source saving. In this paper, a new method, i.e., by using waste activated sludge alkaline fermentation liquid as BNR carbon source, for simultaneously improving SCND and DPRN was reported. First, the performance of SCND and DPRN with sludge fermentation liquid as carbon source was compared with acetic acid, which was commonly used in literatures. Sludge fermentation liquid showed much higher nitrite accumulation during aerobic nitrification than acetic acid (81.8% versus 40.9%), and the former had significant anoxic denitrification and phosphorus uptake. The soluble phosphorus and total nitrogen removal efficiencies with sludge fermentation liquid were much higher than with acetic acid (97.6% against 73.4% and 98.7% versus 79.2%). Then the mechanisms for sludge fermentation liquid showed higher SCND and DPRN than acetic acid were investigated from the aspects of wastewater composition, microorganisms assayed by 16S rRNA gene clone library, and fluorescence in situ hybridization. More NO(2)(-)-N accumulated by the use of sludge fermentation liquid was attributed to be more humic acids in the influent, which inhibited nitrite oxidizing bacteria (NOB) more serious than ammonia oxidizing bacteria (AOB), and more AOB but less NOB were observed in the BNR system. The reasons for sludge fermentation liquid BNR system exhibiting greater short-cut denitrifying phosphorus removal were that there were less glycogen accumulating organisms and more phosphorus accumulating organisms and anoxic denitrifying phosphorus removal bacteria with higher nitrite reductase activity. 相似文献
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为了解中粮长城葡萄酒(宁夏)有限公司基地葡萄园的养分动态变化情况,以便提供更加科学的田间施肥措施,主要针对其土壤的酸碱度,有效氮磷钾、有机质、中量及微量元素等土壤养分状况进行调查。结果显示:该园区土壤呈现碱性,随着种植年限的增加,各大量元素养分均出现不同程度的变化,氮呈增加趋势,磷和钾呈递减趋势;微量元素中除铁和硼比较缺乏外,其他元素基本不缺。因此,在栽培中应增施有机肥,减少氮肥的施用,提高磷、钾肥的施用。在8月可追施少量磷、钾肥;在9月葡萄采收后,可少量追施氮肥,建议通过叶面喷施微量元素补充铁、硼等元素的含量。 相似文献