JPH0567358B2 - - Google Patents
Info
- Publication number
- JPH0567358B2 JPH0567358B2 JP13004789A JP13004789A JPH0567358B2 JP H0567358 B2 JPH0567358 B2 JP H0567358B2 JP 13004789 A JP13004789 A JP 13004789A JP 13004789 A JP13004789 A JP 13004789A JP H0567358 B2 JPH0567358 B2 JP H0567358B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- methane fermentation
- fermentation treatment
- trace elements
- organic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 70
- 239000010802 sludge Substances 0.000 claims description 50
- 238000000855 fermentation Methods 0.000 claims description 32
- 230000004151 fermentation Effects 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 22
- 235000013619 trace mineral Nutrition 0.000 claims description 22
- 239000011573 trace mineral Substances 0.000 claims description 22
- 239000002351 wastewater Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 description 7
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
Description
〔産業上の利用分野〕
本発明は、食品工業、紙パルプ工業、化学工業
等から排出される有機性廃水のメタン発酵処理に
関するものであり、また有機性汚泥の蒸発乾燥で
生ずる凝縮水のメタン発酵処理に関するものであ
る。
〔従来の技術〕
有機性廃水の処理方法の一つとしてメタン発酵
処理方法があり、この方法はメタン菌を作用させ
て廃水中の有機物質を分解して主としてメタンと
することにより、有機物質の量を減少させて廃水
を浄化するものであるが、メタン菌が増殖してそ
の作用を活発に行わせるには、窒素、燐の他に微
量のFe、Ni、Na、Ｋ、Ca、Mg等の無機元素
（これらの元素をこの明細書では「微量元素」と
いう）が必要であると言われている〔エツチ、ヘ
ンツら；固定式膜型反応器における廃水の嫌気性
処理−報文展望；「ウオータ・サイエンス・アン
ド・テクノロジイ」第15巻８／９号、1983年第20
頁（H.Henze et al：Anaerobic treatment of
waste water in fixed film reactors−ａ
literature review；Water Science and
Technology、Volume 15.Number8／９、1983.
p.20）〕。
食品工業、紙パルプ工業、化学工業等において
排出される有機性廃水の中に、Fe、Ni、Na、
Ｋ、Ca、Mg等の無機元素を含まないものがあ
り、このような有機性廃水についてメタン発酵処
理をしようとすると、前記の理由でメタン発酵が
十分に進行せず、処理が行われない。
そこで、このような有機性廃水に微量元素を添
加することが行われ、それは化合物、特に塩の形
で添加されていた。
また、有機性汚泥又は有機性汚泥の脱水ケーキ
などの加熱脱水のさいには、水分が減少した後で
もポンプ操作にかけ得る状態に保たれるように、
前記汚泥などに油を混合して流動しうる混合物と
し、該混合物を加熱して蒸発乾燥する方法が行わ
れているが、その方法における、その蒸発乾燥の
工程で発生する蒸気を凝縮して得た凝縮水も、
Fe、Ni、Na、Ｋ、Ca、Mg等の微量元素を含ま
ないため、それをメタン発酵処理をするのには必
要な微量元素の化合物、特に塩を添加することが
必要とされていた。
〔発明が解決しようとする課題〕
上記のように、有機性廃水に微量元素を化合物
の形で添加するためには、有機性廃水に均一に分
散させる必要から、その化合物を溶解して溶液を
調製し、その溶液を貯留し、有機性廃水にその処
理量に比例した量で添加しなければならないか
ら、それに必要な溶解槽、液貯槽、計量装置を設
けなければならなかつた。また、添加するための
微量元素の化合物を購入しなければならず、前記
の附属装置の装置費とともに処理コストを高くす
る要因となつている。
本発明は、前記の微量元素の化合物の添加を特
にしないで有機性廃水等のメタン発酵処理を行う
ことができるメタン発酵処理方法を提供すること
を目的とするものである。
〔課題を解決するための手段〕
本発明は、微量元素を含まない有機性廃水のメ
タン発酵処理方法において、該微量元素を含まな
い有機性廃水に初沈汚泥、活性汚泥、凝沈汚泥、
あるいはこれらの脱水ケーキよりなる微量元素を
含有する汚泥を添加してメタン発酵処理をするこ
とを特徴とするメタン発酵処理方法によつて、上
記の目的を達成した。
また、本発明は、有機性汚泥又は有機性汚泥の
脱水ケーキに油を混合して流動しうる混合物と
し、該混合物を加熱して蒸発乾燥する方法におけ
る、その蒸発乾燥の工程で発生する蒸気を凝縮し
て得た凝縮水に、初沈汚泥、活性汚泥、凝沈汚
泥、あるいはこれらの脱水ケーキよりなる微量元
素を含有する汚泥を添加してメタン発酵処理をす
ることを特徴とするメタン発酵処理方法によつ
て、前記凝縮水の処理について上記の目的を達成
した。
すなわち、本発明は、微量元素の化合物の代わ
りに、このメタン発酵系以外の系からの微量元素
を含有する汚泥を添加するものである。
本発明で処理しようとする有機性廃水は微量元
素を含まないものであり、また処理しようとする
前記凝縮水は、その水質分析結果の一例を示した
第１表に見られるように、アンモニア性窒素を多
量に含むが、燐及び他のメタン発酵処理に必要な
微量元素はほとんど含まれていない。
[Industrial Application Field] The present invention relates to methane fermentation treatment of organic wastewater discharged from the food industry, pulp and paper industry, chemical industry, etc., and also relates to methane fermentation treatment of condensed water produced by evaporation drying of organic sludge. It is related to fermentation processing. [Prior art] One of the methods for treating organic wastewater is the methane fermentation treatment method. This method uses methane bacteria to decompose organic substances in wastewater to mainly produce methane, thereby decomposing organic substances. This method purifies wastewater by reducing the amount of methane, but in order for methane bacteria to proliferate and actively carry out its action, in addition to nitrogen and phosphorus, trace amounts of Fe, Ni, Na, K, Ca, Mg, etc. are required. It is said that inorganic elements (these elements are referred to as "trace elements" in this specification) are necessary [Etsch, Hentz et al.; Anaerobic treatment of wastewater in a fixed membrane reactor - Report Perspective; "Water Science and Technology" Vol. 15, No. 8/9, 1983 No. 20
Page (H. Henze et al: Anaerobic treatment of
waste water in fixed film reactors−a
literature review；Water Science and
Technology, Volume 15. Number 8/9, 1983.
p.20)] Fe, Ni, Na,
Some organic wastewaters do not contain inorganic elements such as K, Ca, and Mg, and when attempting to perform methane fermentation treatment on such organic wastewater, the methane fermentation does not proceed sufficiently for the reasons mentioned above, and the treatment is not carried out. Therefore, it has been practiced to add trace elements to such organic wastewaters, which have been added in the form of compounds, especially salts. In addition, when heating and dewatering organic sludge or a dehydrated cake of organic sludge, it is necessary to keep it in a state where it can be pumped even after the water content has decreased.
A method has been used in which oil is mixed with the sludge to form a fluid mixture, and the mixture is heated and evaporated to dryness. The condensed water also
Since it does not contain trace elements such as Fe, Ni, Na, K, Ca, Mg, etc., it has been necessary to add necessary trace element compounds, especially salt, to perform methane fermentation treatment. [Problems to be Solved by the Invention] As mentioned above, in order to add trace elements in the form of compounds to organic wastewater, it is necessary to uniformly disperse them in the organic wastewater, so the compound must be dissolved to form a solution. Since the solution must be prepared, stored, and added to organic wastewater in an amount proportional to the amount to be treated, it was necessary to provide the necessary dissolution tank, liquid storage tank, and metering device. Furthermore, it is necessary to purchase a trace element compound for addition, which is a factor that increases the processing cost as well as the equipment cost of the above-mentioned auxiliary equipment. An object of the present invention is to provide a methane fermentation treatment method that can perform methane fermentation treatment on organic wastewater, etc., without the addition of any of the above-mentioned trace element compounds. [Means for Solving the Problems] The present invention provides a methane fermentation treatment method for organic wastewater that does not contain trace elements, in which the organic wastewater that does not contain trace elements is treated with primary sludge, activated sludge, coagulated sludge,
Alternatively, the above object was achieved by a methane fermentation treatment method characterized in that sludge containing trace elements made of these dehydrated cakes is added for methane fermentation treatment. The present invention also provides a method for mixing oil with organic sludge or a dehydrated cake of organic sludge to form a fluid mixture, and heating the mixture to evaporate and dry the mixture, in which steam generated in the evaporative drying step is removed. A methane fermentation process characterized by adding sludge containing trace elements such as initial settling sludge, activated sludge, flocculated sludge, or a dehydrated cake of these to the condensed water obtained by condensation to perform methane fermentation treatment. The method achieved the above objectives for the treatment of the condensate. That is, in the present invention, instead of trace element compounds, sludge containing trace elements from a system other than the methane fermentation system is added. The organic wastewater to be treated in the present invention does not contain trace elements, and the condensed water to be treated is ammoniacal, as shown in Table 1 showing an example of the water quality analysis results. Although it contains large amounts of nitrogen, it contains little phosphorus and other trace elements necessary for methane fermentation processing.
【表】
本発明において、これらの有機性廃水などへの
添加に用いる汚泥としては、下水の初沈汚泥、活
性汚泥法における活性汚泥（余剰汚泥）、凝沈汚
泥（「凝集沈殿汚泥」をいう）が挙げられ、これ
らは脱水されて脱水ケーキとなつたものでもよ
い。第２表に都市下水を対象とした活性汚泥処理
における余剰汚泥の金属含有率の一例を示す。[Table] In the present invention, the sludge used for addition to organic wastewater, etc. includes initial settling sludge of sewage, activated sludge (excess sludge) in the activated sludge method, and coagulated sludge (referring to "coagulated and settled sludge"). ), and these may be dehydrated to form a dehydrated cake. Table 2 shows an example of the metal content of surplus sludge in activated sludge treatment for urban sewage.
微量元素を含有しない有機性廃水及び前記凝縮
水は、メタン発酵処理をしたさいメタン発酵に必
要な微量元素を含有しないために、その発酵処理
が十分に進行しないが、それらに前記した汚泥を
添加すると、この汚泥中に含有される金属元素に
よつて添加された有機性廃水等は微量元素を含有
するものとなり、またメタン発酵の栄養素となる
有機物が混入しているので促進され、メタン発酵
処理を十分に行うことができる。
〔実施例〕
以下、実施例によつて本発明を具体的に示す。
ただし、本発明はこれらの実施例に限定されるも
のではない。
実施例 １
有機性廃水として食品工場の生産工程から排出
される凝縮水を取り上げ、これについてメタン発
酵処理をした実験例を示す。
メタン発酵処理方法としてはUASB法を用い
た。UASB法（Upflow Amaerobic Sludge
Blanket Processの略；上向流嫌気性汚泥床法）
は、メタン発酵微生物群によつて構成された粒状
化凝集体（グラニユール）からなる汚泥のブラン
ケツト型メタン発酵槽を用いるものであつて、高
密度の微生物ペレツトの存在下で処理するため
に、従来のメタン発酵処理法に比べて高負荷処理
が可能な方法である。
第１図はその実験装置を示す。実容積２の
UASB槽７にグラニユール汚泥８を入れ、これ
を恒温槽９内に置き、35℃±２℃で温度制御を行
つた。
第３表に処理すべき凝縮水の水質を示す。前記
凝縮水に含まれる有機物の主体は、酢酸、プロピ
オン酸、エタノール等である。
When organic wastewater and the condensed water that do not contain trace elements are subjected to methane fermentation treatment, the fermentation treatment does not proceed sufficiently because they do not contain the trace elements necessary for methane fermentation, but the above-mentioned sludge is added to them. Then, the organic wastewater added by the metal elements contained in this sludge contains trace elements, and is also mixed with organic matter that serves as nutrients for methane fermentation, which accelerates the methane fermentation process. can be carried out satisfactorily. [Example] Hereinafter, the present invention will be specifically illustrated by examples.
However, the present invention is not limited to these examples. Example 1 An experimental example will be shown in which condensed water discharged from the production process of a food factory as organic wastewater was taken up and subjected to methane fermentation treatment. The UASB method was used as the methane fermentation treatment method. UASB method (Upflow Amaerobic Sludge
Abbreviation for Blanket Process; upflow anaerobic sludge bed method)
This method uses a blanket-type methane fermentation tank for sludge consisting of granulated aggregates (granules) composed of methane-fermenting microorganisms. This method allows for higher load processing compared to the methane fermentation processing method. Figure 1 shows the experimental setup. Actual volume 2
Granule sludge 8 was placed in a UASB tank 7, placed in a constant temperature bath 9, and the temperature was controlled at 35°C±2°C. Table 3 shows the quality of condensed water to be treated. The organic substances contained in the condensed water are mainly acetic acid, propionic acid, ethanol, etc.
【表】
前記凝縮水１を原水貯槽４に入れ、それにリン
酸２をBCD：Ｐ≒100：１になるように添加し、
さらに汚泥３を添加した。添加する汚泥は、Ａ系
列（活性汚泥の余剰汚泥）、Ｂ系列（初沈汚泥）、
Ｃ系列（凝沈汚泥）の３種類を用い、それぞれに
ついて実験を行つた。なお、汚泥の添加率は第４
表に示す。
原水貯槽４から汚泥が添加された前記凝縮水５
を原水ポンプ６より吸引し、UASB槽７の底部
に送り、グラニユール汚泥８の存在下でメタン発
酵処理を行う。処理が終つた水はUASB槽７の
上部から処理水１１として取り出す。処理にさい
して発生した、主としてメタンからなるガス１２
はUASB槽７の上部に設けたガス室１０に貯め
られ、該室からガスメーター１３を経て取り出さ
れる。
比較のため、汚泥を添加せず、無機薬品を添加
してメタン発酵処理を行つた。これをＤ系列とす
る。
これらの実験による実験結果を次の第４表に示
す。[Table] Put the condensed water 1 into the raw water storage tank 4, add phosphoric acid 2 to it so that BCD:P≒100:1,
Furthermore, sludge 3 was added. The sludge to be added is A series (excess sludge of activated sludge), B series (primary settling sludge),
Experiments were conducted using three types of C series (settled sludge). In addition, the addition rate of sludge is the fourth
Shown in the table. The condensed water 5 to which sludge has been added from the raw water storage tank 4
is sucked by the raw water pump 6, sent to the bottom of the UASB tank 7, and subjected to methane fermentation treatment in the presence of the granule sludge 8. The treated water is taken out from the upper part of the UASB tank 7 as treated water 11. Gas mainly composed of methane generated during processing 12
is stored in a gas chamber 10 provided at the top of the UASB tank 7, and taken out from the chamber via a gas meter 13. For comparison, methane fermentation treatment was performed without adding sludge, but with the addition of inorganic chemicals. This is called the D series. The experimental results from these experiments are shown in Table 4 below.
【表】
〓
[Table] 〓
Claims (1)
処理方法において、該微量元素を含まない有機性
廃水に初沈汚泥、活性汚泥、凝沈汚泥、あるいは
これらの脱水ケーキよりなる微量元素を含有する
汚泥を添加してメタン発酵処理をすることを特徴
とするメタン発酵処理方法。 ２ 有機性汚泥又は有機性汚泥の脱水ケーキに油
を混合して流動しうる混合物とし、該混合物を加
熱して蒸発乾燥する方法における、その蒸発乾燥
の工程で発生する蒸気を凝縮して得た凝縮水に、
初沈汚泥、活性汚泥、凝沈汚泥、あるいはこれら
の脱水ケーキよりなる微量元素を含有する汚泥を
添加してメタン発酵処理をすることを特徴とする
メタン発酵処理方法。[Claims] 1. A method for methane fermentation treatment of organic wastewater that does not contain trace elements, wherein the organic wastewater that does not contain trace elements is made of primary sludge, activated sludge, flocculated sludge, or a dehydrated cake thereof. A methane fermentation treatment method characterized by performing methane fermentation treatment by adding sludge containing trace elements. 2 A method in which oil is mixed with organic sludge or a dehydrated cake of organic sludge to form a fluid mixture, and the mixture is heated and evaporated to dryness, obtained by condensing the vapor generated in the evaporation drying process. In the condensed water,
A methane fermentation treatment method comprising adding sludge containing trace elements such as initial settling sludge, activated sludge, flocculated sludge, or a dehydrated cake of these to perform methane fermentation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130047A JPH03199A (en) | 1989-05-25 | 1989-05-25 | Methane fermentation treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1130047A JPH03199A (en) | 1989-05-25 | 1989-05-25 | Methane fermentation treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03199A JPH03199A (en) | 1991-01-07 |
| JPH0567358B2 true JPH0567358B2 (en) | 1993-09-24 |
Family
ID=15024801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1130047A Granted JPH03199A (en) | 1989-05-25 | 1989-05-25 | Methane fermentation treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03199A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0274137B1 (en) * | 1987-01-07 | 1993-07-21 | Yamaha Corporation | Tone signal generation device having a tone sampling function |
| US6855254B1 (en) * | 2003-12-19 | 2005-02-15 | Shalom Recycling Inc. | Magerle metal waste recovery process |
| SE529177E (en) | 2005-12-01 | 2012-12-21 | Tekniska Verken Linkoeping Ab | Use of an additive for digestion of organic matter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57136995A (en) * | 1981-02-19 | 1982-08-24 | Kurita Water Ind Ltd | Treatment of waste water |
| JPS5845796A (en) * | 1981-09-16 | 1983-03-17 | Nishihara Environ Sanit Res Corp | Anaerobic digestion of highly-concentrated organic waste water |
| JPS59392A (en) * | 1982-06-25 | 1984-01-05 | Ebara Infilco Co Ltd | Treatment of organic waste liquor |
| JPS59395A (en) * | 1982-06-24 | 1984-01-05 | Ebara Infilco Co Ltd | Treatment of organic waste liquor containing ammonia nitrogen |
| JPS605293A (en) * | 1983-06-24 | 1985-01-11 | Nippon Kokan Kk <Nkk> | Two-phase anaerobic digestion treatment of organic waste liquid |
| JPS63252958A (en) * | 1987-04-10 | 1988-10-20 | Nippon Telegr & Teleph Corp <Ntt> | Production of ceramics |
-
1989
- 1989-05-25 JP JP1130047A patent/JPH03199A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57136995A (en) * | 1981-02-19 | 1982-08-24 | Kurita Water Ind Ltd | Treatment of waste water |
| JPS5845796A (en) * | 1981-09-16 | 1983-03-17 | Nishihara Environ Sanit Res Corp | Anaerobic digestion of highly-concentrated organic waste water |
| JPS59395A (en) * | 1982-06-24 | 1984-01-05 | Ebara Infilco Co Ltd | Treatment of organic waste liquor containing ammonia nitrogen |
| JPS59392A (en) * | 1982-06-25 | 1984-01-05 | Ebara Infilco Co Ltd | Treatment of organic waste liquor |
| JPS605293A (en) * | 1983-06-24 | 1985-01-11 | Nippon Kokan Kk <Nkk> | Two-phase anaerobic digestion treatment of organic waste liquid |
| JPS63252958A (en) * | 1987-04-10 | 1988-10-20 | Nippon Telegr & Teleph Corp <Ntt> | Production of ceramics |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03199A (en) | 1991-01-07 |
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Legal Events
| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |