技术领域technical field
本发明涉及废弃物处理技术领域，尤其涉及一种使用多类药剂联合调理污泥的方法。The invention relates to the technical field of waste treatment, in particular to a method for jointly conditioning sludge by using multiple types of chemicals.
背景技术Background technique
随着社会经济和城市化的发展，城镇污水处理领域的产生量在不断的增长。截止2015年9月，我国污泥总量已经突破3000万吨/年，处置率仅56％。污泥中水分含量达到95％～99％，脱水缩小体积才便于进一步处置。但污泥的成分、结构复杂，污泥直接进行脱水处理往往达不到预期的处理效果，因此，一般在脱水前需对污泥进行调理(也称为污泥的预处理)，以改善其脱水性能、过滤性能、沉淀性能等，从而实现经济有效的处置污泥。With the development of social economy and urbanization, the output of urban sewage treatment is constantly increasing. As of September 2015, the total amount of sludge in my country has exceeded 30 million tons per year, and the disposal rate is only 56%. The moisture content in the sludge reaches 95% to 99%, and the dehydration reduces the volume to facilitate further disposal. However, the composition and structure of sludge are complex, and the direct dehydration treatment of sludge often fails to achieve the expected treatment effect. Therefore, it is generally necessary to condition the sludge before dehydration (also called sludge pretreatment) to improve its Dewatering performance, filtration performance, sedimentation performance, etc., so as to achieve economical and effective sludge disposal.
污泥调理技术可按作用介质分类为物理法、化学法、生物法。物理法的应用局限性相对较为明显，生物法的研究起源较晚，化学法是目前污水处理厂中应用最为广泛的污泥调理技术。Sludge conditioning technology can be classified into physical method, chemical method and biological method according to the action medium. The limitations of the application of the physical method are relatively obvious, the research on the biological method originated relatively late, and the chemical method is currently the most widely used sludge conditioning technology in sewage treatment plants.
随着污泥处理规模的扩大，为了追求更理想的调理效果，逐渐开始尝试多种调理药剂的联合使用，以得到更好的调理污泥的效果。关于联合调理药剂的研究，目前主要选取某一种调理剂围绕着与聚丙烯酰胺(PAM)、聚合氯化铝等合成高分子调理剂联合使用进行研究较多，如Huang Peng等研究PAM联合蒙脱土，将处理后的蒙脱石通过原位嵌入与PAM聚合成复合材料，再作用于改善废水污泥的脱水性能，取得不错的效果，但其重点在于探究两种药剂的复合过程的条件优化；Li Xiaoxiao等研究PAC联合聚二甲基二烯丙基氯化铵(PDMDAAC)进行污泥调理，同时使用PAC和两者复合调理剂作用污泥，然后比较两个工艺的污泥的体积，固体含量，ζ电位和脱水能力，复合调理剂全面占优且真空过滤污泥后的滤饼的水含量可以实现至80％。With the expansion of the scale of sludge treatment, in order to pursue a more ideal conditioning effect, we gradually began to try the combined use of various conditioning agents to obtain a better sludge conditioning effect. Regarding the research on combined conditioning agents, at present, a certain conditioning agent is mainly selected to be used in combination with synthetic polymer conditioning agents such as polyacrylamide (PAM) and polyaluminum chloride. For example, Huang Peng et al. studied the combination of PAM and Mongolia. For desoiling, the treated montmorillonite is in-situ embedded and polymerized with PAM to form a composite material, and then used to improve the dewatering performance of wastewater sludge, and achieved good results, but the focus is to explore the conditions of the compound process of the two agents Optimization; Li Xiaoxiao et al. studied PAC combined with polydimethyldiallyl ammonium chloride (PDMDAAC) for sludge conditioning, and used PAC and the two composite conditioners to act on sludge at the same time, and then compared the volume of sludge in the two processes , solid content, ζ potential and dehydration ability, the composite conditioner is fully dominant and the water content of the filter cake after vacuum filtering the sludge can reach 80%.
但有机合成高分子调理药剂大多具有生物毒性，且难以被生物降解，因此天然、无毒、易生物降解的壳聚糖(CTS)替代有机合成高分子调理剂的研究已得到人们较多的关注。壳聚糖又名脱乙酰甲壳质、甲壳胺、可溶性甲壳质，是甲壳素脱乙酰基的产物，在天然高分子多糖中是唯一的碱性氨基物质。目前壳聚糖调理污泥的研究集中在单独调理方面，未见有关于其联合调理污泥的研究报道。However, most of the organic synthetic polymer conditioning agents are biologically toxic and difficult to be biodegraded. Therefore, the research of natural, non-toxic and easily biodegradable chitosan (CTS) to replace organic synthetic polymer conditioning agents has attracted more attention. . Chitosan, also known as deacetylated chitin, chitosan, and soluble chitin, is the product of chitin deacetylation and is the only basic amino substance in natural polymer polysaccharides. At present, the research on chitosan conditioning sludge is concentrated on the single conditioning, and there is no research report on the joint conditioning of chitosan.
本发明即通过使用壳聚糖与硅藻土(DE)及过硫酸盐(SPS)三者联合调理污泥，探究不同因素对调理效果的影响，改善污泥综合脱水性能，为生产实际提供调理污泥更优的方法。The present invention uses chitosan, diatomaceous earth (DE) and persulfate (SPS) to jointly condition sludge, explores the influence of different factors on the conditioning effect, improves the comprehensive dehydration performance of sludge, and provides conditioning for actual production. A better way to sludge.
发明内容Contents of the invention
基于背景技术存在的技术问题，本发明目的是提高现有技术中调理剂单一调理污泥时的脱水性能，提供一种使用多类药剂联合调理污泥的方法。Based on the technical problems existing in the background technology, the purpose of the present invention is to improve the dewatering performance of the prior art when a single conditioner is used to condition sludge, and to provide a method for jointly conditioning sludge using multiple types of agents.
本发明的技术方案如下：Technical scheme of the present invention is as follows:
一种使用多类药剂联合调理污泥的方法，包括以下步骤：将污水处理产生的剩余污泥不经储存浓缩，直接送入调理反应器中，经氧化剂/天然高分子絮凝剂/天然吸附材料联合作用，通过一定时间的搅拌混合后，最终得到调理后的污泥，再进行后续脱水及其他处置。A method for jointly conditioning sludge using multiple types of agents, comprising the following steps: sending the excess sludge generated from sewage treatment directly into a conditioning reactor without storing and concentrating, and passing through oxidant/natural polymer flocculant/natural adsorption material Combined effect, after a certain period of stirring and mixing, the conditioned sludge is finally obtained, and then subsequent dehydration and other disposals are carried out.
优选的，所述的剩余污泥(TS)不经储存浓缩指的是：污泥体系浓度、温度、pH值均不处理，也不经储存浓缩。Preferably, the said excess sludge (TS) without storage and concentration refers to: the sludge system concentration, temperature, and pH value are not treated, nor stored and concentrated.
优选的，所述的氧化剂为过硫酸盐(SPS)并用亚铁离子(Fe2+)催化激活；所述的天然高分子絮凝剂为脱乙酰度在80％以上的壳聚糖(CTS)；所述的天然吸附材料为硅藻土(DE)。Preferably, the oxidant is persulfate (SPS) and is activated by ferrous ions (Fe2+ ); the natural polymer flocculant is chitosan (CTS) with a degree of deacetylation above 80%; The natural adsorption material is diatomaceous earth (DE).
优选的，所述的过硫酸盐在污泥中的加入量为0.05-2.0mmol/g；所述的亚铁离子在污泥中的加入量为0.05-2.0mmol/g；所述的壳聚糖在污泥中的加入量为0.1-1.5mg/g；所述的硅藻土在污泥中的加入量为0.1-1.0g/g。Preferably, the added amount of the persulfate in the sludge is 0.05-2.0mmol/g; the added amount of the ferrous ion in the sludge is 0.05-2.0mmol/g; the chitosan The amount of sugar added to the sludge is 0.1-1.5 mg/g; the amount of diatomaceous earth added to the sludge is 0.1-1.0 g/g.
优选的，所述的搅拌时间控制在1-120min。Preferably, the stirring time is controlled within 1-120min.
优选的，所述的搅拌混合的搅拌转速控制在10-400r/min。Preferably, the stirring speed of the stirring and mixing is controlled at 10-400r/min.
本发明的有益之处在于：本发明的氧化剂/天然高分子絮凝剂/天然吸附材料联合调理污泥方法，主要是通过氧化剂打碎污水处理后剩余污泥中微生物的菌胶团结构，并使部分微生物细胞壁破碎，使细胞内物质进入水中，最终使污泥中溶解性有机物增多；并通过天然吸附材料对污泥的吸附作用，对原污泥体系难脱水的稳定性打乱破坏；同时通过天然高分子絮凝剂与污泥体系进行静电中和使得污泥颗粒脱稳，释放水分子，再形成吸附架桥作用使污泥凝聚成更大的絮体，从而使污泥的综合脱水性能改善，使得后续脱水变得更容易进而降低处置污泥的成本。氧化剂、天然吸附材料和天然高分子絮凝剂在污泥调理过程中既分别对污泥直接作用，三者之间又相互创造有利条件进而强化作用。The benefits of the present invention are: the oxidant/natural macromolecule flocculant/natural adsorption material joint conditioning sludge method of the present invention mainly breaks the bacterial micelle structure of microorganisms in the remaining sludge after sewage treatment through the oxidant, and makes Part of the microbial cell wall is broken, allowing the intracellular substances to enter the water, and finally increasing the dissolved organic matter in the sludge; and through the adsorption of the natural adsorption material to the sludge, the stability of the original sludge system that is difficult to dehydrate is disrupted; at the same time, through The electrostatic neutralization of the natural polymer flocculant and the sludge system destabilizes the sludge particles, releases water molecules, and then forms an adsorption bridging effect to make the sludge aggregate into larger flocs, thereby improving the comprehensive dewatering performance of the sludge , making subsequent dewatering easier and reducing the cost of sludge disposal. Oxidants, natural adsorption materials and natural polymer flocculants not only act directly on the sludge in the process of sludge conditioning, but also create favorable conditions for each other to strengthen the action.
由上述对本发明的描述可知，和现有技术相比，本发明将氧化剂/天然高分子絮凝剂/天然吸附材料三者联合用于污泥调理，改善污泥综合脱水性能，使后续脱水变得更容易进而降低处置污泥的成本。与采用单一调理剂(氧化剂或天然高分子絮凝剂或天然吸附材料)调理污泥相比，污泥比阻分别下降了50-70％、30-60％和70-85％，降低污泥处理的成本，适用于污水处理厂和处理站污泥的调理，具有广阔的应用前景。From the above description of the present invention, it can be seen that compared with the prior art, the present invention combines the oxidant/natural polymer flocculant/natural adsorption material for sludge conditioning, improves the comprehensive dewatering performance of sludge, and makes subsequent dehydration easier. Easier and thus lower cost of sludge disposal. Compared with using a single conditioner (oxidant or natural polymer flocculant or natural adsorption material) to condition the sludge, the specific resistance of the sludge decreased by 50-70%, 30-60% and 70-85%, respectively, reducing the sludge treatment The cost is suitable for the conditioning of sludge in sewage treatment plants and treatment stations, and has broad application prospects.
具体实施方式detailed description
由于各地污水水质和所采取的处理工艺不同，产生的剩余污泥性质有所差异，而且不同厂家的氧化剂/天然高分子絮凝剂/天然吸附材料的参数和性能有所区别，因此在不违背本发明实质和所附权利要求范围的前提下，可以对本发明的一些参数进行适当调整，以适应具体的情况。下面结合实施例对本发明作进一步详述，但本发明的保护范围并不仅限于此：Due to the different sewage water quality and treatment processes adopted in different places, the properties of the remaining sludge produced are different, and the parameters and performances of oxidants/natural polymer flocculants/natural adsorption materials of different manufacturers are different, so without violating this principle Under the premise of the essence of the invention and the scope of the appended claims, some parameters of the present invention can be properly adjusted to suit specific situations. Below in conjunction with embodiment the present invention is described in further detail, but protection scope of the present invention is not limited thereto:
实施例1：Example 1:
成都高新西区污水处理厂剩余污泥，性质如下：含水率为99.03±0.09％，污泥比阻为1.76±0.22×1010m·kg-1，pH为6.81±0.11。The properties of the remaining sludge from the West High-Tech Zone Sewage Treatment Plant in Chengdu are as follows: the moisture content is 99.03±0.09%, the specific resistance of the sludge is 1.76±0.22×1010 m·kg-1 , and the pH is 6.81±0.11.
取污泥100ml加入200ml的调理反应器中。在过硫酸根离子投加量0.5mmolSPS/gTS，催化剂亚铁离子投加量0.5mmolFe/gTS，壳聚糖投加量5mgCTS/gTS，硅藻土投加量0.5gDE/gTS，搅拌强度为50r/min，搅拌混合反应时间为2.5min的条件下，调理后污泥比阻变为1.01×109m·kg-1，下降率为91.55％，经0.02MPa真空抽滤78.1s后滤饼含水率下降为83.61％。与采用单一调理剂(氧化剂或天然高分子絮凝剂或天然吸附材料)调理污泥相比，污泥比阻分别下降了74.75％、59.44％、81.54％。Take 100ml of sludge and add it to a 200ml conditioning reactor. The dosage of persulfate ion is 0.5mmolSPS/gTS, the dosage of ferrous catalyst ion is 0.5mmolFe/gTS, the dosage of chitosan is 5mgCTS/gTS, the dosage of diatomaceous earth is 0.5gDE/gTS, and the stirring intensity is 50r /min, under the conditions of stirring and mixing reaction time of 2.5min, the sludge specific resistance after conditioning becomes 1.01×109 m·kg-1 , the decrease rate is 91.55%, and the filter cake contains water after 0.02MPa vacuum filtration for 78.1s The rate dropped to 83.61%. Compared with sludge conditioning with single conditioning agent (oxidant or natural polymer flocculant or natural adsorption material), the specific resistance of sludge decreased by 74.75%, 59.44%, and 81.54%, respectively.
实施例2：Example 2:
成都高新西区污水处理厂剩余污泥，性质如下：含水率为99.03±0.09％，污泥比阻为1.76±0.22×1010m·kg-1，pH为6.81±0.11。The properties of the remaining sludge from the West High-Tech Zone Sewage Treatment Plant in Chengdu are as follows: the moisture content is 99.03±0.09%, the specific resistance of the sludge is 1.76±0.22×1010 m·kg-1 , and the pH is 6.81±0.11.
取污泥100ml加入200ml的调理反应器中。在过硫酸根离子投加量1.0mmolSPS/gTS，催化剂亚铁离子投加量1.0mmolFe/gTS，壳聚糖投加量6.5mgCTS/gTS，硅藻土投加量0.65gDE/gTS，搅拌强度为150r/min，搅拌混合反应时间为2.5min的条件下，调理后污泥比阻变为1.74×109m·kg-1，下降率为85.49％，经0.02MPa真空抽滤89.16s后含水率下降为86.55％，与采用单一调理剂(氧化剂或天然高分子絮凝剂或天然吸附材料)调理污泥相比，污泥比阻分别下降了56.50％、30.12％、73.11％。Take 100ml of sludge and add it to a 200ml conditioning reactor. The dosage of persulfate ion is 1.0mmolSPS/gTS, the dosage of ferrous catalyst ion is 1.0mmolFe/gTS, the dosage of chitosan is 6.5mgCTS/gTS, the dosage of diatomaceous earth is 0.65gDE/gTS, and the stirring intensity is Under the conditions of 150r/min and stirring and mixing reaction time of 2.5min, the specific resistance of the sludge after conditioning becomes 1.74×109 m·kg-1 , the decrease rate is 85.49%, and the moisture content after 0.02MPa vacuum filtration for 89.16s It decreased to 86.55%. Compared with conditioning sludge with a single conditioner (oxidant or natural polymer flocculant or natural adsorption material), the specific resistance of sludge decreased by 56.50%, 30.12%, and 73.11%, respectively.
实施例3：Example 3:
成都高新西区污水处理厂剩余污泥，性质如下：含水率为99.03±0.09％，污泥比阻为1.76±0.22×1010m·kg-1，pH为6.81±0.11。The properties of the remaining sludge from the West High-Tech Zone Sewage Treatment Plant in Chengdu are as follows: the moisture content is 99.03±0.09%, the specific resistance of the sludge is 1.76±0.22×1010 m·kg-1 , and the pH is 6.81±0.11.
取污泥100ml加入200ml的调理反应器中。在过硫酸根离子投加量0.75mmolSPS/gTS，催化剂亚铁离子投加量0.5mmolFe/gTS，壳聚糖投加量5mgCTS/gTS，硅藻土投加量0.5gDE/gTS，搅拌强度为30r/min，搅拌混合反应时间为5min的条件下，调理后污泥比阻变为1.20×109m·kg-1，下降率为91.02％，经0.02MPa真空抽滤72.51s后含水率下降为79.61％，与采用单一调理剂(氧化剂或天然高分子絮凝剂或天然吸附材料)调理污泥相比，污泥比阻分别下降了70.00％、51.81％、81.45％。Take 100ml of sludge and add it to a 200ml conditioning reactor. The dosage of persulfate ion is 0.75mmolSPS/gTS, the dosage of ferrous catalyst ion is 0.5mmolFe/gTS, the dosage of chitosan is 5mgCTS/gTS, the dosage of diatomaceous earth is 0.5gDE/gTS, and the stirring intensity is 30r /min, and the stirring and mixing reaction time is 5min, the specific resistance of the conditioned sludge becomes 1.20×109 m·kg-1 , the decrease rate is 91.02%, and the moisture content decreases to 79.61%, compared with using a single conditioner (oxidant or natural polymer flocculant or natural adsorption material) to condition the sludge, the sludge specific resistance decreased by 70.00%, 51.81%, 81.45%, respectively.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201611261028.6ACN106587571A (en) | 2016-12-30 | 2016-12-30 | Method for co-conditioning of sludge through multiple types of agents |
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| CN201611261028.6ACN106587571A (en) | 2016-12-30 | 2016-12-30 | Method for co-conditioning of sludge through multiple types of agents |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20170426 | |
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