发明名称 |
Purifying dung water from cattle stables - by homogenising, coagulating filtering, and purifying filtrate biologically and chemically and neutralising |
摘要 |
<p>Purificn. is of high organic material contg. dung water obtd. in large scale stabling of cattle. In a first step, dung water is homogenised under aerobic conditions, without phase separation. Homogenised dung water is treated with coagulants, pref. Al2(SO4)3 and >=1 anion-active polyelectrolyte. Solid phase obtd. is separated from liq. phase on filter presses. Liq. phase is purified in a biologically activated sludge step. Activated sludge is removed. Biologically purified filtrate water is re-purified chemically, pref. with CaO as precipitant, setting clarified water pH 10-11.5. Purified water is sepd. from solid phase and neutralised. Ppte. formed is sepd. from purified water in a further settling step. Water-consumption is minimised. Solids obtd. can be composted naturally, for use as agricultural fertilisers. Liq. phase can be used for watering fields and causes no pollution. It can be re-used for rinsing stables. Dung water contg. 1.8-8 wt. % organic material can be processed to 2 end-prods.: purified water and pressed sludge.</p> |
申请公布号 |
NL7708718(A) |
申请公布日期 |
1979.02.07 |
申请号 |
NL19770008718 |
申请日期 |
1977.08.05 |
申请人 |
TATABANYAI SZENBANYAK TE TATABANYA, HONGARIJE. |
发明人 |
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分类号 |
A01C3/00;C02F1/66;C02F3/12;C05F3/00;(IPC1-7):02C1/02;05F3/00 |
主分类号 |
A01C3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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