Перспективная технология очистки коммунальных сточных вод гранулированными илами

2019 ◽  
pp. 34-44
Author(s):  
M. Kevbrina ◽  
A. Akmentina ◽  
A. Dorofeev ◽  
A. Agarev ◽  
V. Aseeva ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Aeration Tank ◽  
Municipal Wastewater Treatment ◽  
Treatment Technology ◽  
Maximum Permissible Concentrations

Увеличение удельной биохимической мощности сооружений с применением так называемых гранулированных активных илов является одним из перспективных направлений развития технологий биологической очистки сточных вод. Гранулированные илы это микробные биоценозы, специализирующиеся на разложении и минерализации веществ, содержащихся в сточных водах. Отличие от обычных илов обусловлено двумя важными факторами: строением основной структурной единицы гранулированного ила гранулы, и высокой скоростью осаждения (до 20 м/ч). Это позволяет создавать в биореакторах очистки сточных вод дозы ила до 10 г/л. Представлены результаты разработки первой в РФ биотехнологии очистки городских сточных вод с применением гранулированного активного ила. Технология реализована на объектах АО Мосводоканал . Технология аэробной биологической очистки в реакторе последовательнопериодического действия с последовательной нитриденитрификацией и восходящим потоком сточной воды позволяет обеспечить качество очищенной воды, соответствующее нормативам предельно допустимых концентраций для сброса в водоемы рыбохозяйственного назначения. Техникоэкономическое сравнение разработанной технологии с технологией удаления биогенных элементов в аэротенке проточного типа показало, что затраты жизненного цикла сооружений с частично гранулированным активным илом в 1,4 раза меньше затрат традиционной технологии биологической очистки (для производительности 1000 м3/сут).Increasing the specific biochemical capacity of the facilities using the socalled granular activated sludge is one of the promising areas for the development of biological wastewater treatment technologies. Granular sludge is microbial biocenosis specializing in the decomposition and mineralization of substances present in wastewater. The main distinction from regular sludge is due to two important factors: the composition of the basic structural unit of granular sludge granules, and a high sedimentation rate (up to 20 m/h). This provides for developing sludge doses of up to 10 g/l in bioreactors of wastewater treatment. The results of the development of the first biotechnology in Russia for municipal wastewater treatment of using granular activated sludge are presented. The technology has been implemented at the facilities of Mosvodokanal JSC. The technology of aerobic biological treatment in a sequencing batch reactor with sequential nitridenitrification and an upward flow of wastewater provides for the quality of effluent that meets the standards for maximum permissible concentrations for discharge into fishery bodies. Technical and economic comparison of the developed technology with the technology of removing nutrients in flowthrough aeration tank showed that the life cycle costs of the facilities with partially granulated activated sludge are 1.4 times less than the costs of traditional biological treatment technology (for a capacity of 1000 m3/day).

scholarly journals Sewage sludge utilization for the municipality of Gdansk

2019 ◽  
pp. 169-177
Author(s):  
Ewa Sienkiewics ◽  
Piotr Kowalik ◽  
Stanislav Drzewinski ◽  
Klemens Herman
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Land Reclamation ◽  
Treatment Plant ◽  
Municipal Wastewater Treatment ◽  
Waste Dump ◽  
Treatment Technology ◽  
Phosphorus Extraction ◽  
Near Future

In the municipal wastewater treatment plant in Gdansk a biological treatment technology allowing removing of nutrients was launched recently. This will result in increasing of the volume of sludge from 27.3 t d.m./d now to about 45 t d.m./d in the near future. The analysis of various possibilities of sludge utilization was made. It was concluded that incineration of the sludge seems to be the most promising method, while the possibilities of application of sludge in agriculture, forestry or to land reclamation are limited. Therefore it is suggested that 90% of sludge should be incinerated and the remaining 10% - stabilized with lime and applicated to land reclamation. The ahses generated during the incineration of sludge should be deposited at the municipal waste dump, with possible phosphorus extraction in the future.

scholarly journals Loofah Sponges as Bio-Carriers in a Pilot-Scale Integrated Fixed-Film Activated Sludge System for Municipal Wastewater Treatment

2020 ◽  
Vol 12 (11) ◽  
pp. 4758
Author(s):  
Huyen T.T. Dang ◽  
Cuong V. Dinh ◽  
Khai M. Nguyen ◽  
Nga T.H. Tran ◽  
Thuy T. Pham ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Agricultural Product ◽  
Aeration Tank ◽  
Municipal Wastewater Treatment ◽  
Treatment Processes ◽  
Fixed Film ◽  
The Cost

Fixed-film biofilm reactors are considered one of the most effective wastewater treatment processes, however, the cost of their plastic bio-carriers makes them less attractive for application in developing countries. This study evaluated loofah sponges, an eco-friendly renewable agricultural product, as bio-carriers in a pilot-scale integrated fixed-film activated sludge (IFAS) system for the treatment of municipal wastewater. Tests showed that pristine loofah sponges disintegrated within two weeks resulting in a decrease in the treatment efficiencies. Accordingly, loofah sponges were modified by coating them with CaCO3 and polymer. IFAS pilot tests using the modified loofah sponges achieved 83% organic removal and 71% total nitrogen removal and met Vietnam’s wastewater effluent discharge standards. The system achieved considerably high levels of nitrification and it was not limited by the loading rate or dissolved oxygen levels. Cell concentrations in the carriers were twenty to forty times higher than those within the aeration tank. Through 16S-rRNA sequencing, the major micro-organism types identified were Kluyvera cryocrescens, Exiguobacterium indicum, Bacillus tropicus, Aeromonas hydrophila, Enterobacter cloacae, and Pseudomonas turukhanskensis. This study demonstrated that although modified loofah sponges are effective renewable bio-carriers for municipal wastewater treatment, longer-term testing is recommended.

scholarly journals Microalgal-Bacterial Granular Sludge Process in Non-Aerated Municipal Wastewater Treatment under Natural Day-Night Conditions: Performance and Microbial Community

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1479
Author(s):  
Shulian Wang ◽  
Lin Zhu ◽  
Bin Ji ◽  
Huan Hou ◽  
Yingqun Ma
Keyword(s):  
Wastewater Treatment ◽  
Relative Abundance ◽  
Municipal Wastewater ◽  
Engineering Application ◽  
Granular Sludge ◽  
System Stability ◽  
Municipal Wastewater Treatment ◽  
Treatment Technology ◽  
Filamentous Microorganisms ◽  
Removal Efficiencies

The microalgal-bacterial granular sludge (MBGS) process is expected to meet the future requirements of municipal wastewater treatment technology for decontamination, energy consumption, carbon emission and resource recovery. However, little research on the performance of the MBGS process in outdoor treatment was reported. This study investigated the performance of the MBGS system in treating municipal wastewater under natural alternate day and night conditions in late autumn. The results showed that the average removal efficiencies of Chemical oxygen demand (COD), NH4+-N and PO43−-P on daytime before cooling (stage I, day 1−4) could reach 59.9% ± 6.8%, 78.1% ± 7.9% and 61.5% ± 4.5%, respectively, while the corresponding average removal efficiencies at night were 47.6% ± 8.0%, 56.5% ± 17.9% and 74.2% ± 7.6%, respectively. Due to the dramatic changes in environmental temperature and light intensity, the microbial biomass and system stability was affected with fluctuation in COD and PO43−-P removal. In addition, the relative abundance of filamentous microorganisms (i.e., Clostridia and Anaerolineae) decreased, while Chlorella maintained a dominant position in the eukaryotic community (i.e., relative abundance > 99%). This study can provide a theoretical basis and technical support for the further engineering application of the MBGS process.

Biological treatment of municipal wastewater with deep tanks and flotation for secondary clarification

1996 ◽  
Vol 34 (3-4) ◽  
pp. 257-265
Author(s):  
R. Gnirss ◽  
A. Peter-Frölich
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Municipal Wastewater ◽  
Energy Requirements ◽  
Municipal Wastewater Treatment ◽  
Space Saving ◽  
Process Energy ◽  
Interesting Alternative ◽  
Pilot Tests

For municipal wastewater treatment, space-saving 10m deep activated sludge tanks are an interesting alternative to conventional tanks of shallow construction. Results from pilot tests in the Berlin-Ruhleben WWTP have shown that the biological P--elimination, nitrification and denitrification processes can be implemented with the same sucess as in shallow tanks. However, the activated sludge did not settle satisfactorily. Flotation was implemented in the process for secondary clarification and has been shown to be advantageous. Tests run over a period of some years with the pilot plant have proven the feasibility of this process. Energy requirements for both systems were found to be approximately the same. A cost estimate based on a preliminary plan revealed a 10% advantage in favour of the 10m WWTP with flotation.

Integration of membrane filtration into the activated sludge process in municipal wastewater treatment

1998 ◽  
Vol 38 (4-5) ◽  
pp. 429-436 ◽  
Author(s):  
N. Engelhardt ◽  
W. Firk ◽  
W. Warnken
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Pilot Plant ◽  
Membrane Filtration ◽  
Large Scale ◽  
Municipal Wastewater ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Municipal Wastewater Treatment ◽  
New Process

Energy-efficient membrane modules for microfiltration are available to realize a new process engineering in municipal wastewater treatment. The microfiltration membrane ensures that all microorganisms are retained in the aeration tank. A content of mixed-liquor suspended solids of e.g. 15 gMLSS/l can easily be achieved in a large scale plant. Thus the aeration tank is considerably reduced in size. A secondary clarifier is no longer needed. A filtration and a disinfection can be dismissed. A pilot plant gives first knowledge on the application of the activated sludge process with submersed membrane filtration. Based on the tests' results and the knowledge gained during the operation of the pilot plant, a WWTP with membrane filtration for 3000 inhabitants is designed. The costs of investment and operation are estimated.

Experience from 10 Years Advanced Wastewater Treatment – Technology and Results

1982 ◽  
Vol 14 (1-2) ◽  
pp. 121-133
Author(s):  
C Forsberg ◽  
B Hawerman ◽  
B Hultman
Keyword(s):  
Wastewater Treatment ◽  
Urban Population ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Municipal Wastewater Treatment ◽  
Treatment Technology ◽  
Removal Efficiencies ◽  
Municipal Wastewater Treatment Plants ◽  
Operational Modes ◽  
Polluted Waters

Experience from advanced municipal wastewater treatment plants and recovery of polluted waters are described for the last ten years in Sweden. Except in municipalities with large recipients, the urban population is served by treatment plants with combined biological and chemical treatment. Most of these plants are post-precipitation plants. Several modified operational modes have been developed in order to improve the removal efficiencies of pollutants and to reduce the costs. Results are presented on the recovery of specially investigated lakes with a lowered supply of total phosphorus and organic matter.

Municipal wastewater treatment in Berlin with deep tanks and flotation for secondary clarification

1996 ◽  
Vol 33 (12) ◽  
pp. 199-210
Author(s):  
R. Gnirss ◽  
A. Peter-Fröhlich ◽  
V. Schmidt
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Energy Requirements ◽  
Municipal Wastewater Treatment ◽  
Space Saving ◽  
Process Energy ◽  
Near Future ◽  
Interesting Alternative ◽  
Pilot Tests

For municipal wastewater treatment, space-saving 10m deep activated sludge tanks are an interesting alternative to conventional tanks of shallow construction. Results from pilot tests in the Berlin-Ruhleben WWTP have shown that the biological P-elimination, nutrification and denitrification processes can be implemented as in shallow tanks. However, the activated sludge did not settle satisfactorily. Flotation was implemented in the process for secondary clarification and in the meanwhile has shown to be advantageous. Tests run over a period of some years with the pilot plant have proven the feasibility of this process. Energy requirements for both systems were found to be approximately the same. A cost estimate based on a preplan revealed a 10% advantage in favour of the 10m WWTP with flotation. For these reasons, one 10m WWTP with flotation for secondary clarification and a capacity of 80,000 m3/d will be built in Berlin in the near future.

PARAMETERS FOR DYNAMIC SIMULATION OF W ASTEW ATER TREATMENT PLANTS WITH HIGH-RATE AND LOW-RATE ACTIVATED SLUDGE TANKS

1994 ◽  
Vol 30 (4) ◽  
pp. 211-214 ◽  
Author(s):  
E. Brands ◽  
M. Liebeskind ◽  
M. Dohmann
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Dynamic Simulation ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
High Rate ◽  
Yield Coefficient ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plants ◽  
Low Rate

This study shows a comparison of important parameters for dynamic simulation concerning the highrate and low-rate activated sludge tanks of several municipal wastewater treatment plants. The parameters for the dynamic simulation of the single-stage process are quite well known, but parameters for the high-ratellow-rate activated sludge process are still missi ng, although a considerable number of wastewater treatment plants are designed and operated that way. At present any attempt to simulate their operation is restricted to the second stage due to missing data concerning growth rate, decay rate, yield coefficient and others.

scholarly journals Nitrogen and Phosphorous Removal in Municipal Wastewater Treatment Plants in China: A Review

2010 ◽  
Vol 2010 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Qiu ◽  
Han-chang Shi ◽  
Miao He
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Water Environment ◽  
Optimization Techniques ◽  
Municipal Wastewater Treatment ◽  
Real Time Control ◽  
Operational Optimization ◽  
Municipal Wastewater Treatment Plants

Surface water environment in China was degraded rapidly in the last two decades, resulting in increasingly tighten criteria issued for municipal wastewater treatment plants (WWTPs). This paper reviewed the recent advances of process design and operational optimization for nutrients removal. Three major processes, as anaerobic-anoxic-oxic (AAO) process, oxidation ditch (OD), and sequencing batch reactor (SBR) occupied 65% of WWTPs amounts and 54% of treatment volumes of China in 2006. However conservative process designs and operational faults often impaired the process performances and energy efficiency. Therefore, typical processes were modified, combined, and innovated to meet the requirements of the diverse influent characteristics and lower energy consumptions. Furthermore, operational optimization techniques by modeling, simulation, and real-time control were also developed and applied in China to improve the process operation. Although great efforts had been contributed to improve the WWTPs performances in China, attentions should be continuously paid to the introduction, instruction, and implementation of advanced techniques. At last, the technical demands and appropriated techniques of WWTPs in China were briefly discussed.

Sign in / Sign up

Export Citation Format

Share Document