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Efficiency of promoting solid-liquid separation of primary sludge by free nitrous isoelectric point pretreatment
- Journal of Civil and Environmental Engineering Vol. 45, Issue 6, Pages: 189-197(2023)
- 作者机构：
重庆大学 三峡库区生态环境教育部重点实验室，重庆 400045
- 作者简介：
HE Qiang (1965- ), professor, doctorial supervisor, main research interests: treatment of town sewage and comprehensive improvement of water ecological environment in urban area, E-mail: Hq0980@126.com.
LIU Caihong （corresponding author）， PhD， E-mail： caihong.liu@cqu.edu.cn.
- 基金信息：Chongqing Technology Innovation and Application Development Special Project(cstc2019jscx-tjsbX0002)
DOI：10.11835/j.issn.2096-6717.2022.082
CLC： X703.1Received：06 April 2022，
Published：25 December 2023
- 稿件说明：
移动端阅览
何强,廖琪琪,李麟等.游离亚硝酸等电点预处理促进初沉污泥固液分离的特性[J].土木与环境工程学报,2023,45(06):189-197.
HE Qiang,LIAO Qiqi,LI Lin,et al.Efficiency of promoting solid-liquid separation of primary sludge by free nitrous isoelectric point pretreatment[J].Journal of Civil and Environmental Engineering,2023,45(06):189-197.
何强,廖琪琪,李麟等.游离亚硝酸等电点预处理促进初沉污泥固液分离的特性[J].土木与环境工程学报,2023,45(06):189-197. DOI： 10.11835/j.issn.2096-6717.2022.082.
HE Qiang,LIAO Qiqi,LI Lin,et al.Efficiency of promoting solid-liquid separation of primary sludge by free nitrous isoelectric point pretreatment[J].Journal of Civil and Environmental Engineering,2023,45(06):189-197. DOI： 10.11835/j.issn.2096-6717.2022.082.
摘要
城镇污水厂每天产生大量初沉污泥，初沉污泥成分复杂，无机质含量高，沉降性能不佳。等电点预处理能有效破坏初沉污泥的絮凝状态，游离亚硝酸通过有效破坏细菌结构促进有机物水解，经预处理后的污泥更有利于发酵回收利用和最终的处理处置。研究游离亚硝酸对初沉污泥作等电点预处理的效果，结果表明，在等电点条件下，初沉污泥沉降性能得到改善，CST从203.10 s降低至101.65 s，有机质在固相中得到最大程度保留，上清液中COD从1 246.59 mg/L降低至1 048.80 mg/L，同时，有效促进污泥中金属污染物溶出，减少了污泥外运处置可能导致的二次污染，但也促进了氮磷类污染物的溶出。投加300 mg/L NO
2
-
-N后进行预处理，初沉污泥SCOD溶出增大，但明显减少了氮磷类污染物的释放，预处理后NH
4
+
-N仅为118.88 mg/L，PO
4
3-
-P为6.91 mg/L。结果表明，NO
2
-
-N投加量为300 mg/L、预处理时长取1 h为最佳条件。
Abstract
WWTPs (Wastewater Treatment Plants) produce a large amount of daily primary sludge. The composition of primary sludge is complex. The inorganic content is high while the settleability is poor. Isoelectric point pretreatment can effectively destroy the flocculation state of the primary sludge. Free nitrous acid can effectively destruct bacterial structure and promote the hydrolysis of organic matter
the pre-treated primary sludge is more conducive to its fermentation
recycling
final treatment and disposal. The effect of isoelectric point pretreatment by free nitrous acid on primary sludge was studied in this study. Experimental results showed that the settling property of primary sludge is improved. The CST reduced from 203.10 s to 101.65 s. Organic matter is retained to the maximum extent in the solid phase. The COD in supernatant decreased from 1 246.59 mg/L to 1 048.80 mg/L. The metal pollutants in the sludge were released efficiently. The secondary pollution in transport and disposal was prevented and reduced. However
this condition also promoted the dissolution of nitrogen and phosphorus pollutants after 300 mg/L NO
2
-
-N was added for pretreatment
SCOD dissolution increased
but the release of nitrogen and phosphorus pollutants was significantly reduced. After pretreatment
NH
4
+
-N was only 118.88 mg /L and PO
4
3-
-P was 6.91 mg /L. These results showed that the best pretreatment condition for primary sludge is 300 mg/L NO
2
-
-N for 1 h.
关键词
Keywords
references
城乡建设统计年鉴 [R]. 北京 : 住房和城乡建设部 , 2020 .
China urban-rural construction statistical yearbook [R]. Beijing : Ministry of Housing and Urban-Rural Development of the People,s Republic of China , 2020 (in Chinese) .
戴晓虎 . 我国污泥处理处置现状及发展趋势 [J]. 科学 , 2020 , 72 ( 6 ): 30 - 34, 4 .
DAI X H . Applications and perspectives of sludge treatment and disposal in China [J]. Science , 2020 , 72 ( 6 ): 30 - 34, 4 . (in Chinese)
GONZALEZ A , HENDRIKS A T W M , VAN LIER J B , et al . Pre-treatments to enhance the biodegradability of waste activated sludge: Elucidating the rate limiting step [J]. Biotechnology Advances , 2018 , 36 ( 5 ): 1434 - 1469 .
WANG X B , CHEN T T , QI X F , et al . Organic matter release from primary sludge by mechanical cutting [J]. Journal of Water Process Engineering , 2021 , 40 : 101896 .
ESKICIOGLU C , KENNEDY K J , DROSTE R L . Initial examination of microwave pretreatment on primary, secondary and mixed sludges before and after anaerobic digestion [J]. Water Science and Technology , 2008 , 57 ( 3 ): 311 - 317 .
BOZKURT Y C , APUL O G . Critical review for microwave pretreatment of waste-activated sludge prior to anaerobic digestion [J]. Current Opinion in Environmental Science & Health , 2020 , 14 : 1 - 9 .
WANG D B , HUANG Y X , XU Q X , et al . Free ammonia aids ultrasound pretreatment to enhance short-chain fatty acids production from waste activated sludge [J]. Bioresource Technology , 2019 , 275 : 163 - 171 .
王琦 , 石寒松 , 李文超 , 等 . 超声处理初沉污泥研究 [J]. 广东化工 , 2017 , 44 ( 1 ): 87 - 88, 102 .
WANG Q , SHI H S , LI W C , et al . Research on ultrasonic treatment of primary sludge [J]. Guangdong Chemical Industry , 2017 , 44 ( 1 ): 87 - 88, 102 . (in Chinese)
NABI M , ZHANG G M , ZHANG P Y , et al . Contribution of solid and liquid fractions of sewage sludge pretreated by high pressure homogenization to biogas production [J]. Bioresource Technology , 2019 , 286 : 121378 .
KOR-BICAKCI G , ESKICIOGLU C . Recent developments on thermal municipal sludge pretreatment technologies for enhanced anaerobic digestion [J]. Renewable and Sustainable Energy Reviews , 2019 , 110 : 423 - 443 .
LU D , SUN F Q , ZHOU Y . Insights into anaerobic transformation of key dissolved organic matters produced by thermal hydrolysis sludge pretreatment [J]. Bioresource Technology , 2018 , 266 : 60 - 67 .
XU Y , ZHENG L K , GENG H , et al . Enhancing acidogenic fermentation of waste activated sludge via isoelectric-point pretreatment: Insights from physical structure and interfacial thermodynamics [J]. Water Research , 2020 , 185 : 116237 .
XU Y , LU Y Q , DAI X H , et al . Enhancing anaerobic digestion of waste activated sludge by solid-liquid separation via isoelectric point pretreatment [J]. ACS Sustainable Chemistry & Engineering , 2018 , 6 ( 11 ): 14774 - 14784 .
李卓君 , 王旭东 , 吕永涛 , 等 . 碱热处理对污泥颗粒及脱水性能的影响特性 [J]. 中国给水排水 , 2019 , 35 ( 13 ): 11 - 15 .
LI Z J , WANG X D , LÜ Y T , et al . Influence of alkaline-thermal treatment on sewage sludge particle and dewatering performance [J]. China Water ＆ Wastewater , 2019 , 35 ( 13 ): 11 - 15 . (in Chinese)
窦川川 , 刘玉玲 , 赵鹏鹤 , 等 . 碱预处理对剩余污泥DOM的溶出特征及平行因子分析 [J]. 中国给水排水 , 2021 , 37 ( 19 ): 14 - 21 .
DOU C C , LIU Y L , ZHAO P H , et al . Effect of alkaline pretreatment on DOM dissolution characteristics of excess sludge and parallel factor analysis [J]. China Water ＆ Wastewater , 2021 , 37 ( 19 ): 14 - 21 . (in Chinese)
BAHREINI G , NAZARI L , HO D , et al . Enzymatic pre-treatment for enhancement of primary sludge fermentation [J]. Bioresource Technology , 2020 , 305 : 123071 .
ZHEN G Y , LU X Q , KATO H , et al . Overview of pretreatment strategies for enhancing sewage sludge disintegration and subsequent anaerobic digestion: Current advances, full-scale application and future perspectives [J]. Renewable and Sustainable Energy Reviews , 2017 , 69 : 559 - 577 .
ZHEN G Y , LU X Q , LI Y Y , et al . Combined electrical-alkali pretreatment to increase the anaerobic hydrolysis rate of waste activated sludge during anaerobic digestion [J]. Applied Energy , 2014 , 128 : 93 - 102 .
NAOUM C , FATTA D , HARALAMBOUS K J , et al . Removal of heavy metals from sewage sludge by acid treatment [J]. Journal of Environmental Science and Health Part A , Toxic/Hazardous Substances & Environmental Engineering, 2001 , 36 ( 5 ): 873 - 881 .
WANG X L , ZHANG L , PENG Y Z , et al . Enhancing the digestion of waste activated sludge through nitrite addition: Insight on mechanism through profiles of extracellular polymeric substances (EPS) and microbial communities [J]. Journal of Hazardous Materials , 2019 , 369 : 164 - 170 .
国家环境保护总局 , 水和废水监测分析方法编委会 . 水和废水监测分析方法 [M]. 北京 : 中国环境科学出版社 , 2002 .
State Environmental Protection Agency , Editorial Board of Methods for Monitoring and Analysis of Water and Wastewater . Methods for monitoring and analysis of water and wastewater [M]. Beijing : China Environmental Science Press , 2002 . (in Chinese) .
CHEN W , WESTERHOFF P , LEENHEER J A , et al . Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matter [J]. Environmental Science & Technology , 2003 , 37 ( 24 ): 5701 - 5710 .
孟彩霞 . 焦化废水中亚硝酸盐和固体悬浮物对CODcr值的影响研究 [J]. 价值工程 , 2010 , 29 ( 36 ): 242 - 243 .
MENG C X . The influence of nitrite and suspended solid of coking wastewater to CODcr [J]. Value Engineering , 2010 , 29 ( 36 ): 242 - 243 . (in Chinese)
李航 , 董立春 , 吕利平 . 低C/N值污水强化生物脱氮性能研究 [J]. 中国给水排水 , 2022 , 38 ( 7 ): 80 - 85 .
LI H , DONG L C , LÜ L P . Enhanced biological nitrogen removal performance of low carbon to nitrogen ratio wastewater [J]. China Water ＆ Wastewater , 2022 , 38 ( 7 ): 80 - 85 . (in Chinese)
巩有奎 , 冯华 , 任丽芳 , 等 . pH调控反硝化除磷过程PAOs-GAOs竞争及N 2 O释放特性 [J]. 环境科学与技术 , 2021 , 44 ( 7 ): 145 - 153 .
GONG Y K , FENG H , REN L F , et al . Utilization of pH to regulate the PAOs-GAOs competition and N 2 O release in denitrification phosphorus removal process [J]. Environmental Science ＆ Technology , 2021 , 44 ( 7 ): 145 - 153 . (in Chinese)
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