SU956433A1 - Method for treating precipitate - Google Patents
Method for treating precipitate Download PDFInfo
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- SU956433A1 SU956433A1 SU803258472A SU3258472A SU956433A1 SU 956433 A1 SU956433 A1 SU 956433A1 SU 803258472 A SU803258472 A SU 803258472A SU 3258472 A SU3258472 A SU 3258472A SU 956433 A1 SU956433 A1 SU 956433A1
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(54) СПОСОБ ОБРАБОТКИ ОСАДКА(54) METHOD FOR PROCESSING SEDIMENTS
Изобретение относитс к способам обработки осадка, образующегос при электрокоагул ционной очистке сточных вод от ионов т желых металлов органи еск .их примесей (ПАВ, нефтепродукты и др.), и может ,быть использовано, например, при очистке стоков гальванического производства предпри тий машиностроени , цветной металлургии и т. д.The invention relates to methods for treating sludge formed during electrocoagulation sewage treatment from heavy metal ions of organic impurities (surfactants, oil products, etc.), and can be used, for example, in cleaning up drains of electroplating plants of mechanical engineering, non-ferrous metallurgy, etc.
Осадки, образующиес при электрокоагул ционной очистке сточных вод от ионов т желых металлов и органических примесей, представл ют собой труднораздел емые суспензии гидроокисей металлов, влаж1ность которых, например, после отсто в течение 6 ч составл ет в среднем 99,0- 99,5%. Обработка таких осадков представл ет собой сложный технологический процесс, включающий стадии кондиционировани , уплотнени и обезвоживани .The sediments formed during the electrocoagulation treatment of waste water from heavy metal ions and organic impurities are difficult to separate by suspensions of metal hydroxides, the moisture content of which, for example, after settling for 6 hours, is on average 99.0- 99.5% . The treatment of such sediments is a complex process involving the stages of conditioning, compaction and dewatering.
Известен способ обработки (т. е. улучшени водоотвод щих свойств) осадков путем их реагентной обработки коагул нтами и флокул нтами 1. Однако этот способ св зан с использованием дефицитных и дорогосто щих реагентов и, кроме того, недостаточно эффективен в случае осадков, образующихс ири электрокоагул ционной очистке сточных вод.A known method of treating (i.e., improving the drainage properties) of sediments by reagent treatment of them with coagulants and flocculants 1. However, this method is associated with the use of scarce and expensive reagents and, moreover, is not sufficiently effective in the case of precipitation resulting from electrocoagulation wastewater treatment.
Наиболее близки)м по технической сущности и достигаемому результату к предлагаемому способу вл етс способ обработки осадка, образующегос при электро5 коагул ционной очистке стоганых вод, заключающийс в последовательной обработке осадка сол ной кислотой и щелочью 2.The closest to the technical essence and the achieved result to the proposed method is a method of treating the sludge formed during the electro-coagulation purification of the stacked waters, which consists in the sequential treatment of the sludge with hydrochloric acid and alkali 2.
Недостатком этого способа вл етс 10 сложность эксплуатации реагентов, приготовлени и дозировани ра1боч;их растворов в кислоты и щелочи.The disadvantage of this method is the difficulty of 10 operating reagents, preparing and dispensing workers, their solutions in acids and alkalis.
Целью изобретени вл етс уменьшение объема осадка упрощение процесса.The aim of the invention is to reduce the volume of sediment to simplify the process.
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Поставленна цель дости1гаетс тем, что обработку осадка, образующегос при электрокоагул ционной очистке сточных вод от ионов т желых металлов и органических примесей, ведут последователь20 но сначала в анодной, а затем в катодной камерах аиафрагменного электролизера с использованием нерастворимых электродов при плотности тока 2-3 А/дм и напр женности электрического пол 500- 25 1500 В/м, причем обработку осадка в .аиодной камере ведут до достижени значени рН 4,0-5,0, а в катодной камере - до достижени (Значени рН 9,0-9,5.This goal is achieved by the treatment of sludge formed during electrocoagulation sewage purification from heavy metal ions and organic impurities, followed, first, in the anodic and then in the cathode chambers of the aiaphragm electrolyzer using insoluble electrodes at a current density of 2-3 A / dm and an electric field strength of 500–25 to 1500 V / m, and the sludge is treated in the ion chamber until a pH value of 4.0-5.0 is reached, and in a cathode chamber - until it is reached (pH value 9.0-9 ,five.
При такой обработке происходит агре30 гирование частлц осадка как под вли ниемUnder such treatment, aggregation of the sediment particles as under the influence of
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU803258472A SU956433A1 (en) | 1980-12-17 | 1980-12-17 | Method for treating precipitate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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SU803258472A SU956433A1 (en) | 1980-12-17 | 1980-12-17 | Method for treating precipitate |
Publications (1)
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SU956433A1 true SU956433A1 (en) | 1982-09-07 |
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SU803258472A SU956433A1 (en) | 1980-12-17 | 1980-12-17 | Method for treating precipitate |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5047126A (en) * | 1989-04-19 | 1991-09-10 | Bernard Greenberg | Method for recovering metal from waste stream |
-
1980
- 1980-12-17 SU SU803258472A patent/SU956433A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5047126A (en) * | 1989-04-19 | 1991-09-10 | Bernard Greenberg | Method for recovering metal from waste stream |
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