On Control Regulation of Urban Initial Period Rainwater Pollution

The initial period rainwater has a great influence on the quality of surface water in Tianjin city. To reducing the initial period rainwater pollution, the effective control measures must be taken for initial period rainwater. A comprehensive operation regulation by using the surplus capacity of sewage treatment plant, reservoirs and rivers is proposed and studied in this paper. The order of initial period rainwater storage is firstly in sewage treatment plant, then in reservoirs and finally drainage to rivers. By carefully arranging the intercepted amount of every storage stage, the pollution of initial period rainfall in an example Tianjin area is shown to be effectively solved.

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The Transformation of Heavy Metal Be in Activated Sludge Process

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.178-181.633 ◽

2012 ◽

Vol 178-181 ◽

pp. 633-636 ◽

Cited By ~ 1

Author(s):

Feng Chen ◽

Xiu Lian Zhu ◽

Wei Yu

Keyword(s):

Heavy Metal ◽

Activated Sludge ◽

Sewage Treatment ◽

Great Influence ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Urban Land Use ◽

Huge Number ◽

Sludge Treatment

Municipalsludge is refers to the product of sewage treatment plant, facing the huge number of municipalsludge, the disposal of the municipalsludge has aroused wide attention of all countries. Many studies consider that urban land use of the municipalsludge is the most effective method, However heavy metal accumulats in the sludge and the environment of the risk with agricultural appears day after day.The purpose of this study is: analysis the transfermation of heavy metals in the activated sludge system of various structures. put forward the solution of reducing heavy metal exceeded in the activated sludge treatment process.It appears that the coagulation can make colloid stabilized and sedimentation, can control the input of the heavy metal effectively; Adsorption of activated sludge to heavy metal is very fast, in 30 min basic reached adsorption balance, probably 80% or more;The change from oxygen to aerobic have great influence on Heavy metal biological adsorption;An aerobic digestion processes can reduce the volume and quality of sludge, but there is no enrichment role to heavy metal in sludge.

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Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operation

Oceanological and Hydrobiological Studies ◽

10.2478/v10009-007-0049-7 ◽

2008 ◽

Vol 37 (2) ◽

Author(s):

Maciej Walczak

Keyword(s):

Water Quality ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Sewage Treatment Plants ◽

Plant Operation ◽

Treated Sewage ◽

Microbiological Parameters ◽

Microbial Indices

Changes of microbial indices of water quality in the Vistula and Brda rivers as a result of sewage treatment plant operationThis paper reports the results of studies of microbiological changes in the water quality of the Vistula and Brda rivers after the opening of sewage treatment plants in Bydgoszcz. The study involved determining the microbiological parameters of water quality. Based on the results obtained, it was found that the quality of the water in both rivers had improved decidedly after the opening of the plants, although an increased number of individual groups of microorganisms was found at the treated sewage outlet from one of the plants.

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Control of Bulking in an Extended Aeration Sewage Treatment Plant

Water Quality Research Journal ◽

10.2166/wqrj.1972.004 ◽

1972 ◽

Vol 7 (1) ◽

pp. 13-20

Author(s):

D.D.P. Cane ◽

G.J. Farguhar

Keyword(s):

Dissolved Oxygen ◽

Control Measure ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Effective Control ◽

Organic Loading Rate ◽

Organic Loading ◽

Mixed Liquor ◽

Air Supply

Abstract A case of filamentous activated sludge bulking was investigated at an extended aeration plant treating wastes from a highway service centre. The purpose of the study was to find an effective control measure for the bulking and, if possible, to determine the cause of the bulking condition. Experiments were conducted to determine the effects upon bulking of: (a) a controlled copper dosage to the mixed liquor, (b) variations in the organic loading rate, and (c) maintenance of high and low dissolved oxygen concentrations in the mixed liquor. The microorganism responsible for the bulking condition was tentatively identified as Sphaerotilus natans. Extensive growths of these bacteria occurred in the sludge when the mixed liquor dissolved oxygen concentration dropped below 0.5 mg/1. Such dissolved oxygen levels had frequently occurred at this plant due to the use of timed aeration cycles and the use of insufficient air supply during peak loading periods. Variations in organic loading rates were found to have no adverse effect on sludge settleability. When bulking was slight, the condition could be improved by increasing the dissolved oxygen level to 1.5 mg/1, or more. The rate at which the filamentous growths could be eliminated from a highly filamentous sludge by increased aeration was very slow, but could be greatly increased by the simultaneous feeding of copper to the mixed liquor at a dosage rate of 1.0 mg/1, based on the raw sewage flows.

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Assessment of Environmental Quality of Soil Fertilized Grapefruit Trees with Municipal Sewage Sludge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.671-674.2736 ◽

2013 ◽

Vol 671-674 ◽

pp. 2736-2741

Author(s):

Yin An Ming ◽

Tao Tao

Keyword(s):

Sewage Sludge ◽

Environmental Quality ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Land Application ◽

Municipal Sewage ◽

Municipal Sewage Sludge ◽

Limiting Factor

To reuse municipal sewage sludge safely, experiment was carried out on grapefruit trees fertilized with composted sludge from Shiweitou Sewage Treatment Plant in Xiamen City of China, and a method was introduced of how to assess the environmental quality of grapefruit trees soil fertilized with sludge by Set Pair Analysis (SPA) model. The results showed that the soil in the surface layer (0-15cm) and the deeper layer (15-30cm) was less clean, and the environment of soil was not polluted. Thus it was feasible to use sludge as fruit fertilizer. The maximum service life of sludge for continuous land application was estimated by taking Cd as the limiting factor, which would provide scientific guide and technical support for safe land application of sludge.

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MBBR+two-stage AO in upgrading and rebuilding project Of a sewage treatment plant in north China

E3S Web of Conferences ◽

10.1051/e3sconf/201913606031 ◽

2019 ◽

Vol 136 ◽

pp. 06031

Author(s):

Shen Dongmei ◽

Yu Cairui ◽

Gao Yulan ◽

Song Xinwei ◽

Chu Jingsong

Keyword(s):

High Efficiency ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Oxidation Ditch ◽

Effluent Quality ◽

Second Stage ◽

The North ◽

Filter Process

A sewage treatment plant is located in the middle of Inner Mongolia. There is a large amount of slaughtering wastewater in the influent with high COD, SS, low annual temperature, poor nitrogen removal effect, and the effluent quality is only grade B. In order to solve the above problems, A\A\O-MBBR + high efficiency sedimentation tank continuous sand filter process was adopted to establish a new anaerobic tank and a first stage AO-MBBR bioreactor. The selection tank and partial oxidation ditch were transformed into the second stage A pool (anoxic pool), and the remaining part of the existing oxidation ditch was transformed into the second stage O pond (aerobic pool), which further removed phosphorus and reduced the SS in the sewage, and solved the problem of low temperature biological treatment in winter in the north of China. The quality of the effluent reached level A after the upgrading.

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Differences in the ASM model caused by data structure

E3S Web of Conferences ◽

10.1051/e3sconf/20184500036 ◽

2018 ◽

Vol 45 ◽

pp. 00036

Author(s):

Zbigniew Kowalewski

Keyword(s):

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Treated Wastewater ◽

Municipal Sewage ◽

Insufficient Amount ◽

The Usa ◽

Plant Monitoring ◽

Model Family

The process of designing and exploiting municipal sewage treatment plants has become much simpler and more efficient thanks to mathematical modeling. The ASM model family is able to simulate the operation of existing or designed objects in a satisfactory manner. The basic problem in Poland is the insufficient amount of data for simulations coming from plant monitoring. It is provided to create unstable model results with difficulties in calibration and validation. The aim of this article is to confirm how the amount of data and its completeness will affect the quality of the simulation performed in the ASM model. The study object is a sewage treatment plant located in Chicago in the USA. It is a sewage treatment plant operating with activated sludge technology, with regular monitoring of the quality of raw and treated wastewater. For modeling, a variant of the ASM model built into the BioWin 5.2 software was used.

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Causes of polytrophism of three lakes in the Wdzydze Landscape Park

Limnological Review ◽

10.2478/v10194-011-0031-3 ◽

2011 ◽

Vol 11 (3) ◽

pp. 97-103

Author(s):

Jerzy Jańczak ◽

Wojciech Maślanka ◽

Kamil Nowiński

Keyword(s):

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Phosphorus Compounds ◽

Lake Water Quality ◽

Nitrogen And Phosphorus ◽

Quality Of Water ◽

Quality Of Waters ◽

Lake Inflows

Causes of polytrophism of three lakes in the Wdzydze Landscape ParkIn the lakes Cheb and Słupino, located in the Wdzydze Landscape Park the quality of waters has been deteriorating in recent years. In the hydrologic year 2009 the quality of water was examined three times. Monthly measurements on the lake inflows and outflows were carried out 12 times to determine biogenic loads. In 2010 the supplementary measurements of biogenic loads were taken in the streams five times. According to Vollenweider's criterion, the loads of nitrogen and phosphorus compounds are too big, the heaviest to Lake Cheb. The discharge from the new sewage treatment plant is directed by the inflows into this lake. A similar situation takes place in the inflow to Lake Schodno. Paradoxically, in some catchments the construction of the sewage treatment plant may result in the deterioration of lake water quality.

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Effects of precipitation on the amount and quality of raw sewage entering a sewage treatment plant in Wodzisław Śląski

Journal of Water and Land Development ◽

10.1515/jwld-2017-0041 ◽

2017 ◽

Vol 34 (1) ◽

pp. 85-93 ◽

Cited By ~ 1

Author(s):

Krzysztof Chmielowski ◽

Piotr M. Bugajski ◽

Grzegorz Kaczor

Keyword(s):

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Precipitation Intensity ◽

Descriptive Statistics ◽

Mean Values ◽

Sewage Contamination ◽

Basic Parameters ◽

Research Period

Abstract The study presents the effects of precipitation on the amount and quality of raw sewage entering a sewage treatment plant in Wodzisław Śląski. It covers a six-year period between January 2010 and December 2015. The research period was divided into seven classes of precipitation intensity. The classes were characterized for their basic descriptive statistics of the raw sewage entering the investigated sewage treatment plant (STP). Data obtained from the collected material and derived from an analysis indicated a considerable influence of precipitation on the amount of sewage entering the investigated facility. Mean amount of sewage entering the STP was by 10.5% (884.9 m3·d-1) greater in B class and by 69.6% (6,153.9 m3·d-1) greater in G class than during dry weather. Individual classes of precipitation intensity were compared for their mean values of raw sewage contamination. Precipitation intensity was found to significantly affect concentrations of the investigated parameters of raw sewage contamination. Basic parameters of sewage contamination (BOD5, CODCr, total suspended solids) were determined and their basic descriptive statistics, such as median, mean, minimum and maximum value, standard deviation and coefficient of variation were calculated.

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